WONDERWARE CORP
SC 14D1, 1998-03-02
PREPACKAGED SOFTWARE
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<PAGE>   1
 
================================================================================
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
 
                                 SCHEDULE 14D-1
              Tender Offer Statement Pursuant to Section 14(d)(1)
                     of the Securities Exchange Act of 1934
                            ------------------------
 
                             WONDERWARE CORPORATION
                           (NAME OF SUBJECT COMPANY)
 
                                   SIEBE PLC
                             WDR ACQUISITION CORP.
                                   (BIDDERS)
                            ------------------------
 
                    COMMON STOCK, PAR VALUE $.001 PER SHARE
                         (TITLE OF CLASS OF SECURITIES)
 
                                   978179109
                     (CUSIP NUMBER OF CLASS OF SECURITIES)
 
                            ------------------------
 
                                DAVID K. ROBBINS
                    FRIED, FRANK, HARRIS, SHRIVER & JACOBSON
                       350 SOUTH GRAND AVENUE, 32ND FLOOR
                             LOS ANGELES, CA 90071
                                 (213) 473-2000
 
            (NAME, ADDRESS AND TELEPHONE NUMBER OF PERSON AUTHORIZED
           TO RECEIVE NOTICES AND COMMUNICATIONS ON BEHALF OF BIDDER)
 
                           CALCULATION OF FILING FEE
 
<TABLE>
<S>                                           <C>
           TRANSACTION VALUATION: *                       AMOUNT OF FILING FEE:
                 $397,100,040                                    $79,420
</TABLE>
 
*  For purposes of calculating fee only. This amount is based on a per share
   offering price of $24.00, for 16,545,835 shares of common stock. Pursuant to
   the Agreement and Plan of Merger, dated as of February 24, 1998, by and among
   Wonderware Corporation (the "Company"), Siebe plc, WDR Acquisition Corp.
   (collectively, the "Bidders") and WDR Sub Corp., the Company represented to
   the Bidders that, as of such date, it had 14,314,078 shares of common stock
   issued and outstanding and 2,231,757 shares of common stock reserved for
   issuance upon exercise of outstanding stock options. The amount of the filing
   fee, calculated in accordance with Rule 0-11 under the Securities Exchange
   Act of 1934, as amended, equals 1/50 of one percent of the aggregate of the
   cash offered by the Bidder.
 
[ ]  Check box if any part of the fee is offset as provided by Rule 0-11 (a)(2)
     and identify the filing with which the offsetting fee was previously paid.
     Identify the previous filing by registration statement number, or the Form
     or Schedule and the date of its filing.
 
Amount Previously Paid: Not applicable
Form or Registration No.: Not applicable
Filing Party: Not applicable
Dated Filed: Not applicable
 
================================================================================
<PAGE>   2
 
     This Tender Offer Statement on Schedule 14D-1 relates to the offer by WDR
Acquisition Corp., a Delaware corporation (the "Offeror"), and an indirect
wholly owned subsidiary of Siebe plc, a public limited company organized under
the laws of the United Kingdom ("Parent"), to purchase all of the outstanding
shares of Common Stock, par value $0.001 per share, of Wonderware Corporation, a
Delaware corporation (the "Company"), including the associated preferred stock
purchase rights (the "Rights") issued pursuant to the Rights Agreement dated as
of February 15, 1996, as amended on February 24, 1998, by and between the
Company and The First National Bank of Boston, as Rights Agent (the "Shares"),
at a price of $24.00 per Share, net to the seller in cash and without interest
thereon, on the terms and subject to the conditions set forth in the Offer to
Purchase, dated March 2, 1998 (the "Offer to Purchase"), and the related Letter
of Transmittal (the "Letter of Transmittal," which together with the Offer to
Purchase, constitutes the "Offer"), copies of which are attached hereto as
Exhibits (a)(1) and (a)(2), respectively.
 
ITEM 1. SECURITY AND SUBJECT COMPANY
 
     (a) The subject company is Wonderware Corporation, a Delaware corporation
with its principal executive offices located at 100 Technology Drive, Irvine,
California 92618.
 
     (b) The information set forth in the Introduction, and Section 1 "Terms of
the Offer," of the Offer to Purchase is incorporated herein by reference.
 
     (c) The information set forth in Section 6 "Price Range of Shares;
Dividends on the Shares" of the Offer to Purchase is incorporated herein by
reference.
 
ITEM 2. IDENTITY AND BACKGROUND
 
     (a) through (d), (g) The information set forth in the Introduction, Section
9 "Certain Information Concerning Offeror," and Annex I of the Offer to Purchase
is incorporated herein by reference.
 
     (e) None of the Offeror, Parent or, to the best knowledge of Offeror or
Parent, any person listed in Annex I of the Offer to Purchase has, during the
last 5 years, been convicted in a criminal proceeding (excluding traffic
violations or similar misdemeanors).
 
     (f) None of the Offeror, Parent or, to the best knowledge of Offeror or
Parent, any person listed in Annex I of the Offer to Purchase has, during the
last 5 years, been a party to a civil proceeding of a judicial or administrative
body of competent jurisdiction and as a result of such proceeding was or is
subject to a judgment, decree or final order enjoining future violations of, or
prohibiting activities subject to, federal or state securities laws or finding
any violation of such laws.
 
ITEM 3. PAST CONTACTS, TRANSACTIONS OR NEGOTIATIONS WITH THE SUBJECT COMPANY
 
     (a) and (b) The information set forth in Section 11 "Background of Offer"
and Section 13 "The Transaction Documents" of the Offer to Purchase are
incorporated herein by reference.
 
     In 1995, The Foxboro Company, an indirect wholly owned subsidiary of Parent
("Foxboro"), initiated litigation against Soft Systems Engineering, Inc.
("SSE"), currently a subsidiary of the Company, to delay the acquisition of SSE
by the Company and subsequently amended its complaint to assert additional
claims with respect to Foxboro's ownership interest in certain software
developed by SSE. Following completion of the acquisition of SSE by the Company,
Foxboro withdrew its initial claims related directly to the acquisition. In
1996, SSE filed its answer and counterclaim to Foxboro's amended complaint,
seeking damages based upon SSE's allegation that Foxboro breached a purported
contractual obligation to sell its interest in the subject software. In January
1997, the parties negotiated an agreement for the mutual dismissal of the claims
asserted in the litigation. The litigation was thereafter dismissed.
 
ITEM 4. SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION
 
     (a) through (c) The information set forth in Section 10 "Source and Amount
of Funds" of the Offer to Purchase is incorporated herein by reference.
 
                                        2
<PAGE>   3
 
ITEM 5. PURPOSE OF THE TENDER OFFER AND PLANS OR PROPOSALS OF THE BIDDER
 
     (a) through (e) The information set forth in Section 12 "Purpose of the
Offer; The Merger; Plans for the Company," Section 13 "The Transaction
Documents," and Section 14 "Dividends and Distributions" of the Offer to
Purchase is incorporated herein by reference.
 
     (d) The information set forth in the Offer to Purchase is incorporated
herein by reference.
 
     (f) and (g) The information set forth in Section 7 "Effect of Offer on
NASDAQ/NMS Listing, Market for Shares and SEC Registration" of the Offer to
Purchase is incorporated herein by reference.
 
ITEM 6. INTEREST IN SECURITIES OF THE SUBJECT COMPANY
 
     (a) and (b) None.
 
ITEM 7. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS
WITH RESPECT TO THE SUBJECT COMPANY'S SECURITIES
 
     The information set forth in the Introduction, Section 1 "Terms of the
Offer," Section 11 "Background of Offer," Section 12 "Purpose of the Offer; The
Merger; Plans for the Company," Section 13 "The Transaction Documents," and
Section 14 "Dividends and Distributions" of the Offer to Purchase is
incorporated herein by reference.
 
ITEM 8. PERSONS RETAINED, EMPLOYED OR TO BE COMPENSATED
 
     The information set forth in Section 17 "Fees and Expenses" of the Offer to
Purchase is incorporated herein by reference.
 
ITEM 9. FINANCIAL STATEMENTS OF CERTAIN BIDDERS
 
     The information set forth in Section 9 "Certain Information Concerning
Offeror" and Annex II of the Offer to Purchase is incorporated herein by
reference. Attached as Exhibit (g)(1) to Item 11 of this Statement are copies of
the financial statements contained in the 1997 Report and Accounts of Parent and
in the 1997 Interim Report of Parent, and certain financial information
contained in the 1996 Report and Accounts of Parent, all of which are
incorporated herein by reference.
 
ITEM 10. ADDITIONAL INFORMATION
 
     (a) None or not applicable.
 
     (b) and (c) The information set forth in Section 16 "Certain Regulatory and
Legal Matters" of the Offer to Purchase is incorporated herein by reference.
 
     (d) The information set forth in Section 7 "Effect of Offer on NASDAQ/NMS
Listing, Market for Shares and SEC Registration" and Section 16 "Certain
Regulatory and Legal Matters" of the Offer to Purchase is incorporated herein by
reference.
 
     (e) None.
 
     (f) The Offer to Purchase, a copy of which is attached as Exhibit (a)(1)
hereto, and the Letter of Transmittal, a copy of which is attached as Exhibit
(a)(2) hereto, each of which is incorporated in its entirety herein by
reference.
 
ITEM 11. MATERIAL TO BE FILED AS EXHIBITS
 
<TABLE>
        <S>              <C>
        (a)(1)           -- Offer to Purchase, dated March 2, 1998.
        (a)(2)           -- Letter of Transmittal.
        (a)(3)           -- Letter from Merrill Lynch & Co., as Dealer Manager, to
                         Brokers, Dealers, Commercial Banks, Trust Companies and Other
                            Nominees.
</TABLE>
 
                                        3
<PAGE>   4

<TABLE>
        <S>              <C>
        (a)(4)           -- Letter to Clients from Brokers, Dealers, Commercial Banks, 
                            Trust Companies and Other Nominees.
        (a)(5)           -- Notice of Guaranteed Delivery.
        (a)(6)           -- Guidelines for Certification of Taxpayer Identification
                            Number on Substitute Form W-9.
        (a)(7)           -- Form of Summary Announcement, as published on March 2, 1998.
        (a)(8)           -- Press Release, as issued by Parent in the United Kingdom on
                            February 24, 1998.
        (a)(9)           -- Press Release, as jointly issued by Parent and the Company in
                            the United States on February 24, 1998.
        (a)(10)          -- Press Release, as issued by Parent on March 2, 1998.
        (a)(11)          -- Confidentiality Agreement dated, February 17, 1998, between
                            the Company and Parent.
        (b)              -- Revolving Credit Agreement, dated November 29, 1995, between
                            Parent, Siebe Inc., Deutsche Siebe GmbH, and Bankers Trust
                            Company, Natwest Capital Markets Limited and SBC Warburg, as
                            Arrangers, Swiss Bank Corporation as Agent, and lenders
                            parties thereto.
        (d) through (f)  -- None or not applicable.
        (c)(1)           -- The Agreement and Plan of Merger, dated as of February 24,
                            1998, among Offeror, Parent, WDR Sub Corp. and the Company.
        (g)(1)           -- Financial information contained in the 1997 and 1996 Reports
                            and Accounts of Parent and 1997 Interim Report of Parent.
</TABLE>
 
                                        4
<PAGE>   5
 
                                   SIGNATURES
 
     After due inquiry and to the best of the knowledge and belief of each of
the undersigned, each of the undersigned certifies that the information set
forth in this statement is true, complete and correct.
 
March 2, 1998
 
                                          SIEBE PLC
 
                                          By: /s/ COLIN P. BONSEY
 
                                            ------------------------------------
                                            Name: Colin P. Bonsey
                                            Title: Director of Planning
 
                                          WDR ACQUISITION CORP.
 
                                          By: /s/ JAMES C. BAYS
 
                                            ------------------------------------
                                            Name: James C. Bays
                                            Title: Vice President
 
                                        5
<PAGE>   6
 
                                 EXHIBIT INDEX
 
<TABLE>
<CAPTION>
        EXHIBIT                                                                 PAGE
        -------                                                                 ----
    <S>                <C>                                                      <C>
    (a)(1)             Offer to Purchase, dated March 2, 1998...............
    (a)(2)             Letter of Transmittal................................
    (a)(3)             Letter from Merrill Lynch & Co., as Dealer Manager,
                       to Brokers, Dealers, Commercial Banks, Trust
                       Companies and Other Nominees.........................
    (a)(4)             Letter to Clients from Brokers, Dealers, Commercial
                       Banks, Trust Companies and Other Nominees............
    (a)(5)             Notice of Guaranteed Delivery........................
    (a)(6)             Guidelines for Certification of Taxpayer
                       Identification Number on Substitute Form W-9.........
    (a)(7)             Form of Summary Announcement, as published on March
                       2, 1998..............................................
    (a)(8)             Press Release, as issued by Parent in the United
                       Kingdom on February 24, 1998.........................
    (a)(9)             Press Release, as jointly issued by Parent and the
                       Company in the United States on February 24, 1998....
    (a)(10)            Press Release, as issued by Parent on March 2,
                       1998.................................................
    (a)(11)            Confidentiality Agreement, dated February 17, 1998,
                       between the Company and Parent.......................
    (b)                Revolving Credit Agreement, dated November 29, 1995,
                       between Parent, Siebe Inc., Deutsche Siebe GmbH, and
                       Bankers Trust Company, Natwest Capital Markets
                       Limited and SBC Warburg, as Arrangers, Swiss Bank
                       Corporation as Agent, and lenders parties thereto....
    (d) through (f)    None or not applicable...............................
    (c)(1)             The Agreement and Plan of Merger, dated as of
                       February 24, 1998, among Offeror, Parent, WDR Sub
                       Corp. and the Company................................
    (g)(1)             Financial information contained in the 1997 and 1996
                       Reports and Accounts of Parent and 1997 Interim
                       Report of Parent.....................................
</TABLE>

<PAGE>   1
 
                           OFFER TO PURCHASE FOR CASH
 
                     ALL OUTSTANDING SHARES OF COMMON STOCK
                                       OF
 
                             WONDERWARE CORPORATION
                                       AT
 
                              $24.00 NET PER SHARE
                                       BY
 
                             WDR ACQUISITION CORP.
                     AN INDIRECT WHOLLY OWNED SUBSIDIARY OF
 
                                   SIEBE PLC
 
         THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT,
         NEW YORK CITY TIME, ON FRIDAY, APRIL 3, 1998, UNLESS EXTENDED.
 
     THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, THERE BEING VALIDLY
TENDERED AND NOT PROPERLY WITHDRAWN PRIOR TO THE EXPIRATION OF THE OFFER THAT
NUMBER OF SHARES OF COMMON STOCK, $.001 PAR VALUE PER SHARE, OF WONDERWARE
CORPORATION ("THE COMPANY"), INCLUDING THE ASSOCIATED PREFERRED STOCK PURCHASE
RIGHTS (COLLECTIVELY, THE "SHARES"), WHICH WOULD REPRESENT, ON A FULLY DILUTED
BASIS, AT LEAST A MAJORITY OF THE OUTSTANDING SHARES. THE OFFER IS ALSO SUBJECT
TO CERTAIN OTHER CONDITIONS CONTAINED IN THIS OFFER TO PURCHASE. SEE
INTRODUCTION AND SECTIONS 1 AND 15 HEREOF.
 
     THIS OFFER (THE "OFFER") IS BEING MADE IN CONNECTION WITH THE AGREEMENT AND
PLAN OF MERGER, DATED AS OF FEBRUARY 24, 1998 (THE "MERGER AGREEMENT"), AMONG
SIEBE PLC, WDR ACQUISITION CORP., WDR SUB CORP. AND THE COMPANY. THE BOARD OF
DIRECTORS OF THE COMPANY HAS UNANIMOUSLY APPROVED THE OFFER AND THE MERGER AND
DETERMINED THAT THE OFFER AND THE MERGER ARE FAIR TO, AND IN THE BEST INTERESTS
OF, THE COMPANY AND ITS STOCKHOLDERS, AND UNANIMOUSLY RECOMMENDS THAT
STOCKHOLDERS ACCEPT THE OFFER AND TENDER ALL OF THEIR SHARES PURSUANT TO THE
OFFER.
                            ------------------------
 
                                   IMPORTANT
 
     Any stockholder of the Company desiring to tender Shares should either (i)
complete and sign the Letter of Transmittal or a facsimile thereof in accordance
with the instructions in the Letter of Transmittal and deliver the Letter of
Transmittal with the Shares and all other required documents to the Depositary
(as defined herein) or follow the procedures for book-entry transfer set forth
in Section 3 or (ii) request such stockholder's broker, dealer, commercial bank,
trust company or other nominee to effect the transaction for the stockholder.
Stockholders having Shares registered in the name of a broker, dealer,
commercial bank, trust company or other nominee must contact such person if they
desire to tender their Shares.
 
     Any stockholder of the Company who desires to tender Shares and whose
certificates representing such Shares are not immediately available or who
cannot comply with the procedures for book-entry transfer on a timely basis or
who cannot deliver all required documents to the Depositary, in each case prior
to the expiration of the Offer, must tender such Shares pursuant to the
guaranteed delivery procedure set forth in Section 3.
 
     Questions and requests for assistance may be directed to Merrill Lynch,
Pierce, Fenner & Smith Incorporated, the Dealer Manager, or to D.F. King & Co.,
Inc., the Information Agent, at their respective addresses and telephone numbers
set forth on the back cover of this Offer to Purchase. Additional copies of this
Offer to Purchase, the Letter of Transmittal, the Notice of Guaranteed Delivery
and other related materials may be obtained from the Information Agent or from
brokers, dealers, commercial banks and trust companies.
                            ------------------------
 
                      The Dealer Manager for the Offer is:
                              MERRILL LYNCH & CO.
March 2, 1998
<PAGE>   2
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
 SECTION                                                                                   PAGE
- ----------                                                                                 ----
<C>         <S>                                                                            <C>
Introduction.............................................................................     1
        1.  Terms of the Offer...........................................................     2
        2.  Acceptance for Payment and Payment for Shares................................     3
        3.  Procedure for Tendering Shares...............................................     4
        4.  Withdrawal Rights............................................................     6
        5.  Certain Federal Income Tax Consequences......................................     6
        6.  Price Range of Shares; Dividends on the Shares...............................     7
        7.  Effect of Offer on NASDAQ/NMS Listing, Market for Shares and SEC
            Registration.................................................................     7
        8.  Certain Information Concerning the Company...................................     8
        9.  Certain Information Concerning Offeror.......................................    10
       10.  Source and Amount of Funds...................................................    11
       11.  Background of Offer..........................................................    11
       12.  Purpose of the Offer; The Merger; Plans for the Company......................    13
       13.  The Transaction Documents....................................................    15
       14.  Dividends and Distributions..................................................    20
       15.  Certain Conditions to Offeror's Obligations..................................    21
       16.  Certain Regulatory and Legal Matters.........................................    22
       17.  Fees and Expenses............................................................    23
       18.  Miscellaneous................................................................    24
  Annex I.  Certain Information Concerning the Directors and Executive Officers of Parent
            and Offeror..................................................................   I-1
 Annex II.  Summary of Significant Differences Between UK GAAP and US GAAP...............  II-1
</TABLE>
 
                                        i
<PAGE>   3
 
TO THE HOLDERS OF COMMON STOCK OF WONDERWARE CORPORATION:
 
                                  INTRODUCTION
 
     WDR Acquisition Corp., a Delaware corporation ("Offeror") and an indirect
wholly owned subsidiary of Siebe plc, a public limited company organized under
the laws of the United Kingdom ("Parent"), hereby offers to purchase all of the
outstanding shares of common stock, par value $0.001 per share, of Wonderware
Corporation, a Delaware corporation (the "Company"), including the associated
preferred stock purchase rights (the "Rights") issued pursuant to the Rights
Agreement, dated as of February 15, 1996, as amended on February 24, 1998 (the
"Rights Agreement"), between the Company and The First National Bank of Boston,
as Rights Agent (collectively, the "Shares"), at a purchase price of $24.00 per
share, net to the seller in cash, upon the terms and subject to the conditions
set forth in this Offer to Purchase and in the related Letter of Transmittal
(which together constitute the "Offer"). Tendering stockholders will not be
obligated to pay brokerage fees or commissions or, except as set forth in
Instruction 6 of the Letter of Transmittal, transfer taxes on the purchase of
Shares by Offeror pursuant to the Offer. Offeror will pay all charges and
expenses of Merrill Lynch, Pierce, Fenner & Smith Incorporated ("Merrill Lynch"
or the "Dealer Manager"), Bankers Trust Company (the "Depositary"), and D.F.
King & Co., Inc. (the "Information Agent") for their respective services in
connection with the Offer and the Merger (as hereinafter defined). See Section
17.
 
     Offeror is a corporation newly formed by Parent in connection with the
Offer and the transactions contemplated by the Merger Agreement (as hereinafter
defined).
 
     THE BOARD OF DIRECTORS OF THE COMPANY HAS UNANIMOUSLY APPROVED THE OFFER
AND THE MERGER AND DETERMINED THAT THE OFFER AND THE MERGER ARE FAIR TO AND IN
THE BEST INTERESTS OF THE COMPANY AND ITS STOCKHOLDERS AND UNANIMOUSLY
RECOMMENDS THAT STOCKHOLDERS ACCEPT THE OFFER AND TENDER THEIR SHARES.
 
     THE BOARD OF DIRECTORS HAS RECEIVED THE OPINION OF HAMBRECHT & QUIST LLC,
THE COMPANY'S FINANCIAL ADVISOR, TO THE EFFECT THAT THE CONSIDERATION TO BE
RECEIVED BY THE STOCKHOLDERS OF THE COMPANY PURSUANT TO THE OFFER AND THE MERGER
IS FAIR FROM A FINANCIAL POINT OF VIEW. A COPY OF THAT OPINION IS SET FORTH IN
FULL AS AN EXHIBIT TO THE COMPANY'S SOLICITATION/RECOMMENDATION STATEMENT ON
SCHEDULE 14D-9 WHICH IS BEING MAILED TO THE COMPANY'S STOCKHOLDERS, AND
STOCKHOLDERS ARE URGED TO READ THE OPINION IN ITS ENTIRETY.
 
     THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, THERE BEING VALIDLY
TENDERED AND NOT WITHDRAWN PRIOR TO THE EXPIRATION OF THE OFFER THAT NUMBER OF
SHARES (THE "MINIMUM NUMBER OF SHARES") WHICH WOULD REPRESENT AT LEAST A
MAJORITY OF ALL OUTSTANDING SHARES ON A FULLY DILUTED BASIS (THE "MINIMUM
CONDITION"). SEE SECTION 15.
 
     The Company has represented to Parent and Offeror that, as of February 24,
1998, there were 14,314,078 Shares issued and outstanding and 2,231,757 Shares
issuable in connection with outstanding stock options. Based on the foregoing,
Offeror believes that approximately 8,272,918 Shares must be validly tendered
and not withdrawn prior to the expiration of the Offer in order for the Minimum
Condition to be satisfied. See Section 1.
 
     The Offer is being made pursuant to an Agreement and Plan of Merger, dated
as of February 24, 1998 (the "Merger Agreement"), by and among Parent, Offeror,
WDR Sub Corp., a Delaware corporation and a wholly owned subsidiary of Offeror
("Merger Sub"), and the Company. The Merger Agreement provides, among other
things, for the making of the Offer by Offeror, and further provides that, upon
the terms and subject to certain conditions of the Merger Agreement, Merger Sub
or another direct or indirect subsidiary of Parent will be merged with and into
the Company (the "Merger"). The Merger Agreement is more fully described in
Section 13. The Merger is subject to a number of conditions, including the
approval and adoption of the Merger Agreement by stockholders of the Company, if
such approval is required by applicable law. See Section 12. In the Merger, each
outstanding Share shall automatically be cancelled and extinguished and each
outstanding Share (other than Shares owned by the Company as treasury stock, by
Parent, or any subsidiary thereof, or Shares held by stockholders who perfect
their appraisal rights under Delaware law) will be converted into and represent
the right to receive $24.00 (or any higher price that may be paid for each Share
pursuant to the Offer) in cash, without interest thereon (the "Offer Price").
 
     THIS OFFER TO PURCHASE AND THE RELATED LETTER OF TRANSMITTAL CONTAIN
IMPORTANT INFORMATION WHICH SHOULD BE READ BEFORE ANY DECISION IS MADE WITH
RESPECT TO THE OFFER.
 
     This Offer to Purchase contains forward-looking statements that involve
risks and uncertainties, including the risks associated with satisfying the
various conditions to the Offer. Certain of these factors as well as additional
risks and uncertainties, are detailed in the Company's periodic filings with the
Securities and Exchange Commission (the "Commission").
<PAGE>   4
 
1.  TERMS OF THE OFFER.
 
     Upon the terms and subject to the conditions set forth in the Offer
(including, if the Offer is extended or amended, the terms and conditions of any
extension or amendment), Offeror will accept for payment and pay for all Shares
validly tendered prior to the Expiration Date and not theretofore withdrawn in
accordance with Section 4. The term "Expiration Date" means 12:00 midnight, New
York City time, on April 3, 1998, unless Offeror shall have extended the period
of time for which the Offer is open, in which event the term "Expiration Date"
shall mean the latest time and date at which the Offer, as so extended by
Offeror, shall expire. In the Merger Agreement, Offeror has agreed that it shall
hold the Offer open not less than 25 business days.
 
     If Offeror shall decide, in its sole discretion, to increase the
consideration offered in the Offer to holders of Shares and, if at the time that
notice of such increase is first published, sent or given to holders of Shares
in the manner specified below, the Offer is scheduled to expire at any time
earlier than the expiration of a period ending on the tenth business day from,
and including, the date that such notice is first so published, sent or given,
then the Offer will be extended until the expiration of such period of ten
business days. For purposes of the Offer, a "business day" means any day other
than a Saturday, Sunday or a federal holiday, and consists of the time period
from 12:01 a.m. through 12:00 midnight, New York City time.
 
     THE OFFER IS CONDITIONED UPON SATISFACTION OF THE MINIMUM CONDITION. THE
OFFER IS ALSO SUBJECT TO OTHER TERMS AND CONDITIONS. SEE SECTION 15. As
described in the Introduction to this Offer to Purchase, Offeror believes the
Minimum Number of Shares is approximately 8,272,918. Offeror reserves the right
(but shall not be obligated), in accordance with applicable rules and
regulations of the Commission, subject to the limitations set forth in the
Merger Agreement and described below, to waive or reduce the Minimum Condition
or to waive any other condition to the Offer; provided, however, that pursuant
to the Merger Agreement, Offeror has agreed that it will not, without the
consent of the Company, waive the Minimum Condition, if such waiver would result
in less than a majority of the outstanding Shares being accepted for payment or
paid for pursuant to the Offer. If the Minimum Condition or any of the other
conditions set forth in Section 15 has not been satisfied by 12:00 midnight, New
York City time, on April 3, 1998 (or any other time then set as the Expiration
Date), Offeror may elect to (1) extend the Offer and, subject to applicable
withdrawal rights, retain all tendered Shares until the expiration of the Offer,
as extended, subject to the terms of the Offer, (2) subject to complying with
applicable rules and regulations of the Commission and to the terms of the
Merger Agreement, accept for payment all Shares so tendered and not extend the
Offer or (3) subject to the terms of the Merger Agreement, terminate the Offer
and not accept for payment any Shares and return all tendered Shares to
tendering stockholders.
 
     Subject to the limitations set forth in the Merger Agreement and described
below, Offeror reserves the right (but will not be obligated), at any time or
from time to time in its sole discretion, to extend the period during which the
Offer is open by giving oral or written notice of such extension to the
Depositary and by making a public announcement of such extension. There can be
no assurance that Offeror will exercise its right to extend the Offer. In the
Merger Agreement, Offeror has agreed that, except as hereinafter provided, it
will not extend the Offer beyond 60 days without the consent of the Company.
 
     Subject to the applicable rules and regulations of the Commission, Offeror
also expressly reserves the right, in its sole discretion at any time and from
time to time, (1) to delay payment for any Shares regardless of whether such
Shares were theretofore accepted for payment, or, subject to the limitations set
forth in the Merger Agreement, to terminate the Offer and not to accept for
payment or pay for any Shares not theretofore accepted for payment or paid for,
upon the occurrence of any of the conditions set forth in Section 15 by giving
oral or written notice of such delay or termination to the Depositary and (2)
subject to the limitations set forth in the Merger Agreement and described
below, at any time or from time to time, to amend the Offer in any respect.
Offeror's right to delay payment for any Shares or not to pay for any Shares
theretofore accepted for payment is subject to the applicable rules and
regulations of the Commission, including Rule 14e-1(c) under the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), relating to Offeror's
obligation to pay for or return tendered Shares promptly after the termination
or withdrawal of the Offer. In the Merger Agreement, Offeror has agreed that it
will not, without the prior written approval of the Company, (1) reduce the cash
price per Share to be paid pursuant to the Offer, (2) reduce the number of
Shares to be purchased pursuant to the Offer, (3) change the form of
consideration to be paid in the Offer, (4) increase the Minimum Number of
Shares, (5) waive the Minimum Condition if such waiver would result in less than
a majority of the outstanding Shares being accepted for payment or paid for
pursuant to the Offer, (6) impose additional conditions to the Offer, (7) extend
the period of the Offer beyond 60 days, unless all required waiting periods
under applicable law have not expired, or (8) otherwise amend the terms of the
Offer in a manner that is materially adverse to the stockholders of the Company.
 
     Any extension of the period during which the Offer is open, delay in
acceptance for payment or payment, or termination or amendment of the Offer,
will be followed, as promptly as practicable, by public announcement thereof,
such announcement in the case of an extension to be issued not later than 9:00
a.m. New York
 
                                        2
<PAGE>   5
 
City time, on the next business day after the previously scheduled Expiration
Date in accordance with the public announcement requirements of Rule 14d-4(c)
under the Exchange Act. Without limiting the obligation of Offeror under such
rule or the manner in which Offeror may choose to make any public announcement,
Offeror currently intends to make announcements by issuing a press release to
the Dow Jones News Service and making any appropriate filing with the
Commission.
 
     If Offeror makes a material change in the terms of the Offer or the
information concerning the Offer or if it waives a material condition of the
Offer (including a waiver of the Minimum Condition), Offeror will disseminate
additional tender offer materials and extend the Offer if and to the extent
required by Rules 14d-4(c), 14d-6(d) and 14(e)-1 under the Exchange Act or
otherwise. The minimum period during which an offer must remain open following
material changes in the terms of the offer or information concerning the offer,
other than a change in price or a change in percentage of securities sought,
will depend upon the facts and circumstances, including the relative materiality
of the terms or information changes. With respect to a change in price or a
change in percentage of securities sought, a minimum ten business day period is
generally required to allow for adequate dissemination to stockholders and
investor response.
 
     The Company has provided Offeror with the Company's list of stockholders
and security position listings for the purpose of disseminating the Offer to
holders of Shares. This Offer to Purchase and the Letter of Transmittal will be
mailed to record holders of the Shares and will be furnished to brokers,
dealers, commercial banks and similar persons whose names, or the names of whose
nominees, appear on the list of stockholders or, if applicable, who are listed
as participants in a clearing agency's security position listing for subsequent
transmittal to beneficial owners of Shares.
 
2.  ACCEPTANCE FOR PAYMENT AND PAYMENT FOR SHARES.
 
     Upon the terms and subject to the conditions of the Offer (including, if
the Offer is extended or amended, the terms and conditions of any such extension
or amendment), Offeror will purchase, by accepting for payment, and will pay
for, all Shares validly tendered prior to the Expiration Date (and not properly
withdrawn) promptly after the later to occur of (a) the Expiration Date and (b)
subject to compliance with Rule 14e-1(c) under the Exchange Act, the
satisfaction or waiver of the conditions set forth in Section 15. Subject to
compliance with Rule 14e-1(c) under the Exchange Act, Offeror expressly reserves
the right to delay payment for Shares in order to comply in whole or in part
with any applicable law. See Sections 1 and 15. In all cases, payment for Shares
accepted for payment pursuant to the Offer will be made only after timely
receipt by the Depositary of (i) certificates for such Shares or timely
confirmation (a "Book-Entry Confirmation") of a book-entry transfer of such
Shares into the Depositary's account at The Depository Trust Company or the
Philadelphia Depository Trust Company (collectively, the "Book-Entry Transfer
Facilities"), pursuant to the procedures set forth in Section 3, (ii) a properly
completed and duly executed Letter of Transmittal (or manually signed facsimile
thereof) with all required signature guarantees or, in the case of a book-entry
transfer, an Agent's Message (as defined below) and (iii) any other documents
required by the Letter of Transmittal.
 
     The term "Agent's Message" means a message transmitted by a Book-Entry
Transfer Facility to, and received by, the Depositary and forming a part of a
Book-Entry Confirmation, which states that such Book-Entry Transfer Facility has
received an express acknowledgment from the participant in such Book-Entry
Transfer Facility tendering the Shares that such participant has received and
agrees to be bound by the terms of the Letter of Transmittal and that the
Offeror may enforce such agreement against the participant.
 
     For purposes of the Offer, Offeror will be deemed to have accepted for
payment, and thereby purchased, Shares validly tendered and not withdrawn as, if
and when Offeror gives oral or written notice to the Depositary of Offeror's
acceptance of such Shares for payment. In all cases, payment for Shares
purchased pursuant to the Offer will be made by deposit of the purchase price
with the Depositary, which will act as agent for tendering stockholders for the
purpose of receiving payment from Offeror and transmitting such payment to
tendering stockholders. If, for any reason whatsoever, acceptance for payment of
any Shares tendered pursuant to the Offer is delayed, or Offeror is unable to
accept for payment Shares tendered pursuant to the Offer, then, without
prejudice to Offeror's rights under Section 15, the Depositary may,
nevertheless, on behalf of Offeror, retain tendered Shares, and such Shares may
not be withdrawn, except to the extent that the tendering stockholders are
entitled to withdrawal rights as described in Section 4 below and as otherwise
required by Rule 14e-1(c) under the Exchange Act. Under no circumstances will
interest be paid on the purchase price for Shares by Offeror by reason of any
delay in making such payment.
 
     If any tendered Shares are not accepted for payment pursuant to the terms
and conditions of the Offer for any reason, or if certificates are submitted for
more Shares than are tendered, certificates for such unpurchased or untendered
Shares will be returned, without expense to the tendering stockholder (or, in
the case of Shares delivered by book-entry transfer to a Book-Entry Transfer
Facility, such Shares will be credited to an account
 
                                        3
<PAGE>   6
 
maintained within such Book-Entry Transfer Facility), as promptly as practicable
after the expiration, termination or withdrawal of the Offer.
 
     If, prior to the Expiration Date, Offeror increases the consideration
offered to stockholders pursuant to the Offer, such increased consideration will
be paid to all stockholders whose Shares are purchased pursuant to the Offer.
 
     Offeror reserves the right to transfer or assign, in whole or from time to
time in part, to Parent or to one or more direct or indirect subsidiaries of
Parent, the right to purchase Shares tendered pursuant to the Offer, but any
such transfer or assignment will not relieve Offeror of its obligations under
the Offer and will in no way prejudice the rights of tendering stockholders to
receive payment for Shares validly tendered and accepted for payment pursuant to
the Offer.
 
3.  PROCEDURE FOR TENDERING SHARES.
 
     Valid Tenders.  For Shares to be validly tendered pursuant to the Offer, a
properly completed and duly executed Letter of Transmittal (or facsimile
thereof), with any required signature guarantees and any other required
documents, must be received by the Depositary at one of its addresses set forth
on the back cover of this Offer to Purchase prior to the Expiration Date. In
addition, either (i) certificates representing such Shares must be received by
the Depositary or such Shares must be tendered pursuant to the procedure for
book-entry transfer set forth below, and a Book-Entry Confirmation must be
received by the Depositary, in each case prior to the Expiration Date, or (ii)
the guaranteed delivery procedure set forth below must be complied with. No
alternative, conditional or contingent tenders will be accepted. DELIVERY OF
DOCUMENTS TO A BOOK-ENTRY TRANSFER FACILITY DOES NOT CONSTITUTE DELIVERY TO THE
DEPOSITARY.
 
     Book-Entry Transfer.  The Depositary will make a request to establish an
account with respect to the Shares at each Book-Entry Transfer Facility for
purposes of the Offer within two business days after the date of this Offer to
Purchase. Any financial institution that is a participant in a Book-Entry
Transfer Facility's system may make book-entry delivery of Shares by causing a
Book-Entry Transfer Facility to transfer such Shares into the Depositary's
account at a Book-Entry Transfer Facility in accordance with such Book-Entry
Transfer Facility's procedures for transfer. Although delivery of Shares may be
effected through book-entry at a Book-Entry Transfer Facility, the Letter of
Transmittal (or a manually signed facsimile thereof), properly completed and
duly executed, with any required signature guarantees and any other required
documents, must, in any case, be transmitted to and received by the Depositary
at one of its addresses set forth on the back cover of this Offer to Purchase
prior to the Expiration Date or the guaranteed delivery procedures described
below must be complied with.
 
     Signature Guarantee.  Signatures on the Letter of Transmittal need not be
guaranteed by a member firm of a registered national securities exchange
(registered under Section 6 of the Exchange Act), by a member of the National
Association of Securities Dealers, Inc. or by a commercial bank or trust company
having an office or correspondent in the United States or by any other "Eligible
Guarantor Institution," as defined in Rule 17Ad-15 under the Exchange Act
(collectively, "Eligible Institutions"), unless the Shares tendered thereby are
tendered (i) by a registered holder of Shares who has completed either the box
entitled "Special Delivery Instructions" or the box entitled "Special Payment
Instructions" on the Letter of Transmittal or (ii) as noted in the following
sentence. If the certificates evidencing Shares are registered in the name of a
person or persons other than the signer of the Letter of Transmittal, or if
payment is to be made or certificates for unpurchased Shares are to be issued to
a person other than the registered owner or owners, then the certificates must
be endorsed or accompanied by appropriate stock powers, in either case signed
exactly as the name or names of the registered owner or owners appear on the
certificates, with the signatures on the certificates or stock powers guaranteed
as provided in the Letter of Transmittal. See Instructions 1 and 5 to the Letter
of Transmittal.
 
     Guaranteed Delivery.  If a stockholder desires to tender Shares pursuant to
the Offer and such stockholder's certificates for Shares are not immediately
available or time will not permit all required documents to reach the Depositary
prior to the Expiration Date or the procedure for book-entry transfer cannot be
completed on a timely basis, such Shares may nevertheless be tendered if all of
the following guaranteed delivery procedures are duly complied with:
 
          (i) the tender is made by or through an Eligible Institution;
 
          (ii) a properly completed and duly executed Notice of Guaranteed
     Delivery, substantially in the form provided by Offeror herewith, is
     received by the Depositary, as provided below, prior to the Expiration
     Date; and
 
          (iii) the certificates for all tendered Shares, in proper form for
     transfer (or a Book-Entry Confirmation), together with a properly completed
     and duly executed Letter of Transmittal (or facsimile
 
                                        4
<PAGE>   7
 
     thereof), and any required signature guarantees and any other documents
     required by the Letter of Transmittal are received by the Depositary within
     five NASDAQ/National Market System ("NASDAQ/NMS") trading days after the
     date of such Notice of Guaranteed Delivery.
 
     The Notice of Guaranteed Delivery may be delivered by hand or transmitted
by telegram, telex, facsimile transmission or mail to the Depositary and must
include a guarantee by an Eligible Institution in the form set forth in the
Notice of Guaranteed Delivery.
 
     THE METHOD OF DELIVERY OF SHARES, THE LETTER OF TRANSMITTAL AND ALL OTHER
REQUIRED DOCUMENTS, INCLUDING DELIVERY THROUGH ANY BOOK-ENTRY TRANSFER FACILITY,
IS AT THE OPTION AND RISK OF THE TENDERING STOCKHOLDER. IF DELIVERY IS BY MAIL,
REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY INSURED, IS RECOMMENDED.
 
     Notwithstanding any other provision hereof, payment for Shares accepted for
payment pursuant to the Offer will in all cases be made only after timely
receipt by the Depositary of certificates for the Shares (or a Book-Entry
Confirmation), a properly completed and duly executed Letter of Transmittal (or
a manually signed facsimile thereof) and any other documents required by the
Letter of Transmittal.
 
     BACKUP FEDERAL INCOME TAX WITHHOLDING.  TO PREVENT BACKUP FEDERAL INCOME
TAX WITHHOLDING WITH RESPECT TO PAYMENT OF THE PURCHASE PRICE OF SHARES
PURCHASED PURSUANT TO THE OFFER, EACH STOCKHOLDER MUST PROVIDE THE DEPOSITARY
WITH HIS CORRECT TAXPAYER IDENTIFICATION NUMBER AND CERTIFY THAT HE IS NOT
SUBJECT TO BACKUP FEDERAL INCOME TAX WITHHOLDING BY COMPLETING THE SUBSTITUTE
FORM W-9 INCLUDED IN THE LETTER OF TRANSMITTAL. SEE INSTRUCTION 10 SET FORTH IN
THE LETTER OF TRANSMITTAL.
 
     Determinations of Validity.  All questions as to the form of documents and
the validity, eligibility (including time of receipt) and acceptance for payment
of any tender of Shares will be determined by Offeror, in its sole discretion,
and its determination will be final and binding on all parties. Offeror reserves
the absolute right to reject any or all tenders of any Shares that are
determined by it not to be in proper form or the acceptance of or payment for
which may, in the opinion of Offeror, be unlawful. Offeror also reserves the
absolute right to waive any of the conditions of the Offer (other than the
Minimum Condition, as described above) or any defect or irregularity in the
tender of any Shares. Offeror's interpretation of the terms and conditions of
the Offer (including the Letter of Transmittal and the Instructions to the
Letter of Transmittal) will be final and binding on all parties. No tender of
Shares will be deemed to have been validly made until all defects and
irregularities have been cured or waived. None of Offeror, the Dealer Manager,
the Depositary, the Information Agent or any other person will be under any duty
to give notification of any defects or irregularities in tenders or incur any
liability for failure to give any such notification.
 
     Other Requirements.  By executing the Letter of Transmittal as set forth
above, a tendering stockholder irrevocably appoints designees of Offeror as such
stockholder's proxies, each with full power of substitution, in the manner set
forth in the Letter of Transmittal, to the full extent of such stockholder's
rights with respect to the Shares tendered by such stockholder and accepted for
payment by Offeror (and any and all other Shares or other securities or rights
issued or issuable in respect of such Shares on or after February 24, 1998). All
such proxies shall be considered coupled with an interest in the tendered
Shares. This appointment is effective when, and only to the extent that, Offeror
deposits the payment for such Shares. Upon acceptance for payment, all prior
proxies given by the stockholder with respect to such Shares or other securities
or rights will, without further action, be revoked and no subsequent proxies may
be given (and, if given, will not be deemed effective). The designees of Offeror
will, with respect to the Shares and other securities or rights, be empowered to
exercise all voting and other rights of such stockholder as they in their sole
judgment deem proper in respect of any annual or special meeting of the
Company's stockholders, or any adjournment or postponement thereof, or in
connection with any action by written consent in lieu of any such meeting or
otherwise. Offeror reserves the right to require that, in order for Shares to be
deemed validly tendered, immediately upon Offeror's payment for such Shares,
Offeror must be able to exercise full voting and other rights with respect to
such Shares and the other securities or rights, including voting at any meeting
of stockholders then scheduled.
 
     The tender of Shares pursuant to any one of the procedures described above
will constitute the tendering stockholder's acceptance of the terms and
conditions of the Offer as well as the tendering stockholder's representation
and warranty that (a) such stockholder has a net long position in the Shares
being tendered within the meaning of Rule 14e-4 under the Exchange Act and (b)
the tender of such Shares complies with Rule 14e-4. It is a violation of Rule
14e-4 for a person, directly or indirectly, to tender Shares for such person's
own account unless, at the time of tender, the person so tendering (i) has a net
long position equal to or greater than the amount of (x) Shares tendered or (y)
other securities immediately convertible into or exchangeable or exercisable for
the Shares tendered and such person will acquire such Shares for tender by
conversion, exchange or exercise and (ii) will cause such Shares to be delivered
in accordance with the terms of the Offer. Rule 14e-4 provides a similar
restriction applicable to the tender or guarantee of a tender on behalf of
another person. Offeror's acceptance for payment of Shares tendered pursuant to
the Offer will constitute a binding
 
                                        5
<PAGE>   8
 
agreement between the tendering stockholder and Offeror upon the terms and
subject to the conditions of the Offer.
 
4.  WITHDRAWAL RIGHTS.
 
     Except as otherwise provided in this Section 4, tenders of Shares made
pursuant to the Offer are irrevocable. Shares tendered pursuant to the Offer may
be withdrawn at any time prior to the Expiration Date and, unless theretofore
accepted for payment pursuant to the Offer, may also be withdrawn at any time
after April 30, 1998. If purchase of or payment for Shares is delayed for any
reason or if Offeror is unable to purchase or pay for Shares for any reason,
then, without prejudice to Offeror's rights under the Offer, tendered Shares may
be retained by the Depositary on behalf of Offeror and may not be withdrawn
except to the extent that tendering stockholders are entitled to withdrawal
rights as set forth in this Section 4, subject to Rule 14e-1(c) under the
Exchange Act which provides that no person who makes a tender offer shall fail
to pay the consideration offered or return the securities deposited by or on
behalf of security holders promptly after the termination or withdrawal of the
Offer.
 
     For a withdrawal to be effective, a written, telegraphic, telex or
facsimile transmission notice of withdrawal must be timely received by the
Depositary at one of its addresses set forth on the back cover of this Offer to
Purchase. Any notice of withdrawal must specify the name of the person who
tendered the Shares to be withdrawn, the number of Shares to be withdrawn and
the name in which the certificates representing such Shares are registered, if
different from that of the person who tendered the Shares. If certificates for
Shares to be withdrawn have been delivered or otherwise identified to the
Depositary, then, prior to the physical release of such certificates, the serial
numbers shown on such certificates must be submitted to the Depositary and,
unless such Shares have been tendered by an Eligible Institution, the signatures
on the notice of withdrawal must be guaranteed by an Eligible Institution. If
Shares have been tendered pursuant to the procedures for book-entry transfer set
forth in Section 3, any notice of withdrawal must also specify the name and
number of the account at the applicable Book-Entry Transfer Facility to be
credited with the withdrawn Shares.
 
     All questions as to the form and validity (including time of receipt) of
notices of withdrawal will be determined by Offeror, in its sole discretion, and
its determination will be final and binding on all parties. None of Offeror, the
Dealer Manager, the Depositary, the Information Agent or any other person will
be under any duty to give notification of any defects or irregularities in any
notice of withdrawal or incur any liability for failure to give any such
notification.
 
     Any Shares properly withdrawn will be deemed not validly tendered for
purposes of the Offer, but may be retendered at any subsequent time prior to the
Expiration Date by following any of the procedures described in Section 3.
 
5.  CERTAIN FEDERAL INCOME TAX CONSEQUENCES.
 
     The following is a summary of the principal federal income tax consequences
of the Offer and the Merger to holders whose Shares are purchased pursuant to
the Offer or whose Shares are converted to cash in the Merger (including
pursuant to the exercise of appraisal rights). The discussion applies only to
holders of Shares in whose hands Shares are capital assets, and may not apply to
Shares received pursuant to the exercise of employee stock options or otherwise
as compensation, or to holders of Shares who are in special tax situations (such
as insurance companies, tax-exempt organizations or non-U.S. persons), or to
persons holding Shares as part of a "straddle," "hedge," or "conversion
transaction." This discussion does not address any aspect of state, local or
foreign taxation.
 
     THE FEDERAL INCOME TAX CONSEQUENCES SET FORTH BELOW ARE INCLUDED FOR
GENERAL INFORMATIONAL PURPOSES ONLY AND ARE BASED UPON CURRENT LAW. BECAUSE
INDIVIDUAL CIRCUMSTANCES MAY DIFFER, EACH HOLDER OF SHARES SHOULD CONSULT SUCH
HOLDER'S OWN TAX ADVISOR TO DETERMINE THE APPLICABILITY OF THE RULES DISCUSSED
BELOW TO SUCH STOCKHOLDER AND THE PARTICULAR TAX EFFECTS OF THE OFFER AND THE
MERGER, INCLUDING THE APPLICATION AND EFFECT OF STATE, LOCAL AND OTHER TAX LAWS.
 
     The receipt of cash for Shares pursuant to the Offer or the Merger
(including pursuant to the exercise of appraisal rights) will be a taxable
transaction for federal income tax purposes (and also may be a taxable
transaction under applicable state, local and other income tax laws). In
general, for federal income tax purposes, a holder of Shares will recognize gain
or loss equal to the difference between the holder's adjusted tax basis in the
Shares sold pursuant to the Offer or converted to cash in the Merger and the
amount of cash received therefor. Gain or loss must be determined separately for
each block of Shares (i.e., Shares acquired at the same cost in a single
transaction) sold pursuant to the Offer or converted to cash in the Merger. Such
gain or loss will be capital gain or loss (other than, with respect to the
exercise of appraisal rights, amounts, if any, which are or are deemed to be
interest for federal income tax purposes, which amounts will be taxed as
ordinary income) and will be (i) long-term gain or loss if, on the date of sale
(or, if applicable, the date of the Merger), the Shares were held for more than
eighteen months, and (ii) mid-term gain or loss if, on the date of
 
                                        6
<PAGE>   9
 
sale (or, if applicable, the date of the Merger), the Shares were held for more
than one year but not more than eighteen months.
 
     Payments in connection with the Offer or the Merger may be subject to
"backup withholding" at a 31% rate. Backup withholding generally applies if the
stockholder (a) fails to furnish his social security number or other taxpayer
identification number ("TIN"), (b) furnishes an incorrect TIN, (c) fails
properly to report interest or dividends or (d) under certain circumstances,
fails to provide a certified statement, signed under penalties of perjury, that
the TIN provided is his correct number and that he is not subject to backup
withholding. Backup withholding is not an additional tax but merely an advance
payment, which may be refunded to the extent it results in an overpayment of
tax. Certain persons generally are entitled to exemption from backup
withholding, including corporations and financial institutions. Certain
penalties apply for failure to furnish correct information and for failure to
include the reportable payments in income. Each stockholder should consult with
his own tax advisor as to his qualification for exemption from withholding and
the procedure for obtaining such exemption.
 
6.  PRICE RANGE OF SHARES; DIVIDENDS ON THE SHARES.
 
     According to the Company's Annual Report on Form 10-K for the fiscal year
ended December 31, 1996 (the "Company 10-K"), the Shares are traded on
NASDAQ/NMS under the symbol "WNDR" and the Company has never paid any cash
dividends on the Shares. Pursuant to the Merger Agreement, the Company has
agreed not to declare, set aside for payment or pay any dividends or other
distributions with respect to the Shares prior to consummation of the Merger.
The following table sets forth the high and low sales prices per Share on the
NASDAQ/NMS for the periods indicated, as reported in published financial
sources.
 
<TABLE>
<CAPTION>
                                                                      HIGH        LOW
                                                                    --------    -------
        <S>                                                         <C>         <C>
        Year ended December 31, 1996:
             First Quarter........................................    $24.75    $ 14.25
             Second Quarter.......................................     24.63      17.88
             Third Quarter........................................     19.38       7.88
             Fourth Quarter.......................................     11.25       7.00
        Year ended December 31, 1997:
             First Quarter........................................     11.75       8.75
             Second Quarter.......................................     14.75       8.75
             Third Quarter........................................     20.38      13.88
             Fourth Quarter.......................................     18.75      12.13
        Year ending December 31, 1998:
             First Quarter (through February 27, 1998)............     23.75      12.75
</TABLE>
 
     The closing sale price per Share on the NASDAQ/NMS on February 23, 1998,
the last full day of trading prior to the public announcement of Offeror's
intention to make the Offer, was $16.00. The closing sale price per Share on the
NASDAQ/NMS on February 27, 1998, the last full day of trading prior to the
commencement of the Offer, was $23.63. Stockholders are urged to obtain current
market quotations for the Shares and to review all information received by them
from the Company, including the proxy materials and annual and quarterly reports
referred to in Section 8.
 
7.  EFFECT OF OFFER ON NASDAQ/NMS LISTING, MARKET FOR SHARES AND SEC
REGISTRATION.
 
     The purchase of the Shares by Offeror pursuant to the Offer will reduce the
number of Shares that might otherwise trade publicly and may reduce the number
of holders of Shares, which could adversely affect the liquidity and market
value of the remaining Shares held by stockholders other than Offeror. The
Company 10-K indicates that, as of February 28, 1997, there were approximately
303 stockholders of record.
 
     Depending upon the number of Shares purchased pursuant to the Offer, the
Shares may no longer meet the standards for continued inclusion on the
NASDAQ/NMS. If trading volume were lower than such standards, quotations might
continue to be published in the "additional list" or in one of the "local
lists", or such quotations might not be published at all. If the number of
holders of Shares (based on round lots) fell below 400, NASDAQ might cease to
provide quotations but quotations might still be available from other sources.
Offeror cannot predict whether NASDAQ trading volume standards for publication
will be met after the Offer.
 
     The Shares are currently registered under the Exchange Act. Such
registration may be terminated upon application by the Company to the Commission
if there are fewer than 300 record holders of Shares. It is the intention of
Offeror to seek to cause an application for such termination to be made as soon
after
 
                                        7
<PAGE>   10
 
consummation of the Offer as the requirements for termination of registration of
the Shares are met. If such registration were terminated, the Company would no
longer legally be required to disclose publicly in proxy materials distributed
to stockholders the information which it now must provide under the Exchange Act
or to make public disclosure of financial and other information in annual,
quarterly and other reports required to be filed with the Commission under the
Exchange Act; the officers, directors and 10% stockholders of the Company would
no longer be subject to the "short-swing" insider trading reporting and profit
recovery provisions of the Exchange Act or the proxy statement requirements of
the Exchange Act in connection with stockholders' meetings; and the Shares would
no longer be eligible for NASDAQ reporting or for continued inclusion on the
Federal Reserve Board's "margin list". Furthermore, if such registration were
terminated, persons holding "restricted securities" of the Company may be
deprived of their ability to dispose of such securities under Rule 144
promulgated under the Securities Act of 1933, as amended.
 
8.  CERTAIN INFORMATION CONCERNING THE COMPANY.
 
     Except as specifically set forth herein, the information concerning the
Company contained in this Offer to Purchase has been taken from or is based upon
publicly available documents and records on file with the Commission and other
public sources. Neither Parent nor Offeror has any knowledge that would indicate
that any statements contained herein based on such documents and records are
untrue. However, neither Parent nor Offeror assumes any responsibility for the
accuracy or completeness of the information concerning the Company, furnished by
the Company or contained in such documents and records or for any failure by the
Company to disclose events which may have occurred or which may affect the
significance or accuracy of any such information but which are unknown to
Offeror.
 
     The Company is a Delaware corporation with its principal executive offices
located at 100 Technology Drive, Irvine, California 92618. According to the
Company 10-K, the Company supplies Microsoft Windows-based software products for
the industrial automation market that enable customers to rapidly develop
personal computer applications providing dynamic, graphical representations of
physical processes in a factory that can interact with and control that process.
 
     Set forth below is certain summary consolidated financial information with
respect to the Company and its subsidiaries excerpted or derived from the
consolidated financial statements presented in the Company's January 26, 1998
earnings release and in the Company 10-K. More comprehensive financial
information is included in such reports and in other documents filed by the
Company with the Commission (which may be inspected or obtained in the manner
set forth below), and the following summary is qualified in its entirety by
reference to such reports and other documents and all of the financial
information and notes contained therein or incorporated therein by reference.
 
                                        8
<PAGE>   11
 
                             WONDERWARE CORPORATION
 
                  SELECTED CONSOLIDATED FINANCIAL INFORMATION
                    (IN THOUSANDS EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                             YEAR ENDED DECEMBER 31,
                                                    ------------------------------------------
                                                     1997*       1996        1995       1994
                                                    -------    --------    --------    -------
<S>                                                 <C>        <C>         <C>         <C>
CONSOLIDATED STATEMENT OF OPERATIONS DATA:
Revenues..........................................  $82,519    $ 64,924    $ 55,011    $35,705
Operating income (loss)...........................    3,691     (10,240)    (21,703)     9,772
Net income (loss).................................    4,284      (6,121)    (14,302)     7,575
Per share:
  Net income (loss) per share.....................      .29        (.45)      (1.13)       .58
  Weighted average number of common and common
     equivalents..................................   14,570      13,658      12,650     13,131
</TABLE>
 
<TABLE>
<CAPTION>
                                                                      AT DECEMBER 31,
                                                              -------------------------------
                                                               1997*        1996       1995
                                                              --------    --------    -------
<S>                                                           <C>         <C>         <C>
CONSOLIDATED BALANCE SHEET DATA:
Total current assets........................................  $ 74,747    $ 70,437    $80,913
Property and equipment, net.................................    12,421      13,396      6,272
Investments, goodwill, non-current deferred taxes and other
  assets....................................................    10,927       9,666      4,176
  Total assets..............................................    98,095      93,499     91,362
  Total liabilities.........................................    11,640      14,893      9,521
  Total stockholders' equity................................    86,455      78,606     81,841
</TABLE>
 
- ---------------
 
* Unaudited
 
     During the course of discussions between Parent and the Company that led to
the execution of the Merger Agreement (see Section 11), the Company provided
Parent with certain information relating to the Company which Offeror believes
is not publicly available. This information included an operating budget for the
Company for 1998 developed by the Company's senior management predicated on
their assumptions for macroeconomic conditions, gross profits and operating
expenses. The Company's 1998 operating budget projected 1998 revenues of $100
million; operating income in a range between $15,099,000 and $17,899,000; net
income in a range between $11,615,000 and $13,463,000; and net income per Share
in a range between $.78 and $.90 (based on weighted average Shares of
15,125,000). The foregoing information has been excerpted from the materials
presented to Parent and does not reflect consummation of the Offer or the
Merger.
 
     The foregoing projections constitute forward-looking statements that
involve risks and uncertainties, including, but not limited to, risks associated
with fluctuations in quarterly results, product introductions, competition,
rapid technological change, reliance on distribution channels, international
sales and other factors. These risks and uncertainties are discussed in greater
detail in the Company's periodic filings with the Commission.
 
     The Company does not as a matter of course make public any projections as
to future performance or earnings, and the estimates set forth above are
included in this Offer to Purchase only because the information was made
available to Parent by the Company. The Company has informed Parent that the
projections were not prepared with a view to public disclosure or compliance
with the published guidelines of the Commission or the guidelines established by
the American Institute of Certified Public Accountants regarding projections or
forecasts. The Company has also informed Parent that its internal financial
forecasts (upon which the projections provided to Parent were based in part)
are, in general, prepared solely for internal use and capital budgeting and
other management decision-making purposes and are subjective in many respects
and thus susceptible to various interpretations and periodic revision based on
actual experience and business developments. Projected information of this type
is based on estimates and assumptions that are inherently subject to significant
economic and competitive uncertainties and contingencies, all of which are
difficult to predict and many of which are beyond the control of the Company,
Offeror or Parent or their respective financial advisors. Many of the
assumptions upon which the projections were based, none of which were approved
by Parent or Offeror, are dependent upon economic forecasting (both general and
specific to the Company's businesses), which is inherently uncertain and
subjective. The inclusion of the foregoing projections should not be regarded as
an indication that the Company, Offeror, Parent or any other person who received
such information considers it an accurate prediction of future events, and
neither Offeror nor Parent has relied on them as such. None of the Company,
Offeror or Parent or their respective financial advisors assumes any
responsibility for the accuracy or validity of any of the projections.
 
                                        9
<PAGE>   12
 
     The Company is subject to the information and reporting requirements of the
Exchange Act and, in accordance therewith, is obligated to file reports and
other information with the Commission relating to its business, financial
condition, and other matters. Information as of particular dates concerning the
Company's directors and officers, their remuneration, stock options granted to
them, the principal holders of the Company's securities, any material interests
of such persons in transactions with the Company, and other matters is required
to be disclosed in proxy statements distributed to the Company's stockholders
and filed with the Commission. Such reports, proxy statements, and other
information should be available for inspection at the Commission's Public
Reference Room, Room 1024, 450 Fifth Street, N.W., Washington, D.C. 20549, and
copies should be obtainable upon payment of the Commission's customary charges
by writing to the Commission's principal office at 450 Fifth Street, N.W.,
Washington, D.C. 20549. Such material should also be available for inspection
and copying at the regional offices of the Commission located at Seven World
Trade Center, 13th Floor, New York, New York, 10048 and Citicorp Center, 500
West Madison Street, Suite 1400, Chicago, Illinois 60661. The Commission also
maintains a World Wide Web site on the Internet at http://www.sec.gov that
contains reports, proxy statements and other information regarding registrants
that file electronically with the Commission.
 
9.  CERTAIN INFORMATION CONCERNING OFFEROR.
 
     Offeror, a Delaware corporation, was recently incorporated for the purpose
of making the Offer and Merger Sub, a Delaware corporation, was recently
incorporated for the purpose of the Merger. All of the outstanding capital stock
of Merger Sub is owned by Offeror.
 
     Until, with respect to Offeror, immediately prior to the time it purchases
Shares pursuant to the Offer, and, with respect to Merger Sub, immediately prior
to the Merger, it is not anticipated that Offeror or Merger Sub will have any
significant assets or liabilities or engage in activities other than those
incidental to their formation and capitalization and the transactions
contemplated by the Offer and the Merger. Since Offeror and Merger Sub are newly
formed and have minimal assets and capitalization, no meaningful financial
information is available with respect to either of them.
 
     Parent is a holding company which, through its subsidiaries and related
companies, engages in the design, manufacture and marketing of process
automation and building control systems, temperature and appliance controls and
engineered industrial equipment.
 
     The principal executive offices of Offeror and Merger Sub are located at
1013 Centre Road, Wilmington, Delaware 19805. The principal executive offices of
Parent are located at Saxon House, 2-4 Victoria Street, Windsor, Berkshire SL4
1EN, United Kingdom.
 
     The name, business address, past and present principal occupations and
citizenship of each of the directors and executive officers of Offeror and
Parent are set forth in Annex I to this Offer to Purchase.
 
     Set forth below is certain summary consolidated financial information with
respect to Parent. The summary below is qualified in its entirety by reference
to Parent financial information contained in Parent's 1997 and 1996 Annual
Reports and Accounts and 1997 Interim Report filed as an exhibit to the Tender
Offer Statement on Schedule 14D-1 with respect to the Offer filed by the Offeror
and Parent (the "Schedule 14D-1") which may be inspected and copies obtained at
the offices of the Commission as set forth in Section 8 (except that they will
not be available at the regional offices of the Commission), and such financial
information and related notes are incorporated herein by reference.
 
     Neither Offeror nor Parent is subject to the informational filing
requirements of the Exchange Act. Offeror does not file reports or other
information with the Commission relating to its business, financial condition or
other matters. Parent files certain reports (including its Annual Report and
Accounts) and information pursuant to Rule 12g3-2(b)(1) under the Exchange Act,
which may be inspected and copies obtained at the offices of the Commission set
forth in Section 8 (except that they will not be available at the regional
offices of the Commission). In addition, stockholders of the Company may also
obtain copies of Parent's 1997 and 1996 Annual Reports and Accounts and 1997
Interim Report by contacting the Corporate Secretary of Parent at Parent's
principal executive offices in the United Kingdom set forth above.
 
     Parent's consolidated financial statements have been prepared in accordance
with United Kingdom accounting practices ("UK GAAP") which practices are
described in the notes to such statements. UK GAAP are not the same as generally
accepted accounting principles in the United States ("US GAAP"). Parent has not
determined its financial position or results of operations for any period under
US GAAP. See Annex II hereto for a description of the material differences
between UK GAAP and US GAAP. Offeror believes that the differences between US
GAAP and UK GAAP are not, for purposes of this Offer, material to a decision by
a stockholder of the Company whether to sell, tender or hold any Shares since
any such differences would not affect the ability of Offeror to obtain all funds
necessary to pay for Shares to be acquired pursuant to the Offer and the Merger.
 
                                       10
<PAGE>   13
 
                    SELECTED CONSOLIDATED FINANCIAL DATA(1)
 
<TABLE>
<CAPTION>
                                           SIX MONTHS ENDED SEPTEMBER 30,                       FISCAL YEAR ENDED
                                       --------------------------------------    ------------------------------------------------
                                                                                    APRIL 5,       APRIL 5,   APRIL 6,   APRIL 1,
                                            1997*         1997*       1996*           1997           1997       1996       1995
                                       ---------------   --------    --------    ---------------   --------   --------   --------
                                         (US DOLLARS       (POUNDS STERLING        (US DOLLARS            (POUNDS STERLING
                                       IN MILLIONS)(2)       IN MILLIONS)        IN MILLIONS)(2)            IN MILLIONS)
<S>                                    <C>               <C>         <C>         <C>               <C>        <C>        <C>
CONSOLIDATED PROFIT AND LOSS ACCOUNT
  DATA:
  Sales..............................      2,747.5        1,706.5     1,471.4        4,838.5        3,005.3   2,599.1     2,146.2
  Profit on ordinary activities
    before taxation..................        356.9          221.7       190.4          682.8          424.1     331.1       275.1
  Taxation on ordinary activities....       (127.8)         (79.4)      (71.4)        (252.6)        (156.9)   (126.8)     (108.7)
  Profit on ordinary activities after
    taxation.........................        229.1          142.3       119.0          430.2          267.2     204.3       166.4
  Minority interests.................         (8.7)          (5.4)       (6.9)         (21.6)         (13.4)    (11.3)       (6.1)
  Attributable to Siebe..............        220.4          136.9       112.1          408.6          253.8     193.0       160.3
CONSOLIDATED BALANCE SHEET DATA (AT
  END OF PERIOD):
  Cash at bank and in hand...........        403.0          250.3       270.3          339.4          210.8     282.3       280.1
  Current assets excluding cash......      2,826.7        1,755.7     1,435.7        2,265.3        1,407.0   1,240.3     1,113.0
  Fixed assets.......................      2,807.4        1,743.7     1,542.3        2,467.2        1,532.4   1,423.7     1,210.8
  Current liabilities................     (1,809.3)      (1,123.8)     (869.3)      (1,530.2)        (950.4)   (832.5)     (809.3)
  Other liabilities..................     (2,060.7)      (1,279.9)   (1,116.1)      (1,693.4)      (1,051.8)   (972.4)     (749.4)
                                          --------       --------    --------       --------       --------   -------    --------
BALANCE SHEET TOTAL..................      2,167.1        1,346.0     1,262.9        1,848.3        1,148.0   1,141.4     1,045.2
                                          ========       ========    ========       ========       ========   =======    ========
  Capital and reserves...............      1,951.2        1,211.9     1,106.4        1,636.7        1,016.6   1,062.3       966.2
  Minority interests.................        215.9          134.1       156.5          211.6          131.4      79.1        79.0
                                          --------       --------    --------       --------       --------   -------    --------
BALANCE SHEET TOTAL..................      2,167.1        1,346.0     1,262.9        1,848.3        1,148.0   1,141.4     1,045.2
                                          ========       ========    ========       ========       ========   =======    ========
</TABLE>
 
- ---------------
 
  * Unaudited.
 
(1) See Annex II for a description of certain differences between UK GAAP and US
    GAAP.
 
(2) Pounds Sterling ("L") are translated into U.S. Dollars at L1-$1.61, the Noon
    Buying Rate on September 30, 1997.
 
10.  SOURCE AND AMOUNT OF FUNDS.
 
     If all Shares (including Shares covered by options outstanding at February
24, 1998) are tendered to and purchased by Offeror, the aggregate purchase price
and all estimated commissions, fees and expenses will be approximately $403
million. Offeror intends to obtain all of such funds from Parent which in turn
would obtain such funds from Parent's existing working capital, from drawings
under Parent's currently existing unsecured $1.5 billion revolving credit
facility arranged by Bankers Trust Company, Natwest Capital Markets Limited and
SBC Warburg, and from proceeds from the exercise of the Company's outstanding
stock options. As of the close of business on February 27, 1998, the undrawn
amount available to Parent under this facility was approximately $507 million.
Amounts drawn under the facility are unsecured, bear interest at an effective
rate of 5.9% (as of February 27, 1998) and mature on November 29, 2000. The
Parent believes that all such borrowings will be repayable from its operations
and subsequent refinancings which may be entered into from time to time in the
ordinary course of business. The Offer is not conditioned on the Offeror or the
Parent obtaining any financing.
 
     Parent will effect loans or contributions to capital in order to make funds
available to Offeror, as determined by Parent. Parent will prepare
documentation, on terms and conditions satisfactory to Parent and customary in
such loans between Parent and its subsidiaries, to evidence such intercompany
loans or contributions to capital.
 
11.  BACKGROUND OF OFFER.
 
     The Company is engaged in lines of business similar or complimentary to
those of Parent and its affiliates. Accordingly, subsidiaries of Parent have
followed the business activities of the Company for some time.
 
     In October 1997, Merrill Lynch initially contacted Parent to discuss the
possibility of a business combination transaction between the Company and
Parent. Merrill Lynch advised Parent that it had not been retained by, nor had
it had any discussions with, the Company with respect to a possible transaction.
 
     On January 9, 1998, representatives of Parent met with representatives of
the Company in Atlanta, Georgia to discuss a possible technology joint venture
relationship. Parent and the Company concluded that they were interested in
pursuing a joint technology program. The parties did not discuss a possible
acquisition of the Company by Parent at that time.
 
                                       11
<PAGE>   14
 
     On January 13, 1998, Dr. George W. Sarney, President and Chief Operating
Officer of the Siebe Control Systems division of Parent, contacted Roy H.
Slavin, Chairman of the Board, Chief Executive Officer and President of the
Company, to schedule a meeting between Dr. Sarney, Mr. Slavin and Allen M.
Yurko, Managing Director and Chief Executive Officer of Parent, in San
Francisco, California on January 20, 1998, a date on which all of them would be
in San Francisco attending a trade seminar. Dr. Sarney did not inform Mr. Slavin
that the purpose of the meeting was to discuss a possible acquisition of the
Company by Parent.
 
     On January 20, 1998, Mr. Yurko, Dr. Sarney and Mr. Slavin met in San
Francisco. At this meeting, Mr. Yurko expressed his view that there could be
significant benefits associated with a business combination between Parent and
the Company. Mr. Yurko indicated that Parent was willing to consider a possible
acquisition of the Company at a purchase price as high as a 50% premium to the
then current market price for the Shares (the closing sale price for the Shares
on January 16, 1998, the last full day of trading prior to the January 20, 1998
meeting, was $13.75). Mr. Slavin then discussed in general terms the current
status of the Company's business affairs, future prospects and opportunities for
growth. Mr. Slavin stated that the Company's financial results for the fiscal
year ended December 31, 1997 would be released shortly and the parties concluded
that any further discussions regarding a possible acquisition should not be
pursued until those year-end financial results of the Company were released. The
Company released its 1997 fiscal year-end financial results to the public on
January 26, 1998.
 
     On February 3, 1998, Dr. Sarney contacted Mr. Slavin and informed him that
Parent continued to be interested in pursuing a business combination with the
Company and that Parent was willing to consider a purchase price with respect to
a possible acquisition of the entire Company at $22.00 per share, subject to
increase should the Company demonstrate additional value. Mr. Slavin advised Dr.
Sarney that the Company would consider the merits of an acquisition of the
Company at such a price level in due course.
 
     On February 11, 1998, Mr. Slavin contacted Dr. Sarney to schedule in-person
meetings between representatives of Parent and the Company so that Parent could
conduct preliminary due diligence and the parties could further discuss the
possibility and terms of a business combination transaction. A meeting was
scheduled for February 18, 1998 in Irvine, California. During the telephone
conversation on February 11, 1998, Dr. Sarney reiterated Parent's willingness to
consider a possible acquisition of the Company at a purchase price of $22.00 and
up to $24.00 per share, depending on the results of Parent's due diligence
review of the Company. Shortly thereafter, the Company provided Parent with
certain financial and other information concerning the Company and, in response
to a request by Dr. Sarney, representatives of senior management of the Company
(Mr. Slavin and Sam M. Auriemma, the Company's Chief Financial Officer)
delivered to Parent preliminary views on possible post-combination compensation
for senior management of the Company.
 
     Parent executed a Confidentiality Agreement with the Company, effective as
of February 17, 1998, that required Parent and its representatives to maintain
certain confidential information provided to them by or on behalf of the Company
confidential and also included customary standstill restrictions.
 
     On February 18, 1998, representatives of the parties met to discuss a
potential business combination transaction and Parent commenced a limited
business review of the Company. Following that review of the Company, Parent
proposed a purchase price of $23.00 per share. Mr. Slavin informed Parent that
he believed $23.00 was not likely to be acceptable to the Company's Board of
Directors but that he would discuss the offer with the Company's Board of
Directors, certain senior members of management of the Company and the Company's
advisors. Thereafter, after a period of due diligence and intense negotiations,
Parent agreed to increase its offer to $24.00 per share, subject to the
execution and delivery of a mutually satisfactory Merger Agreement, including
provisions regarding payment of a Termination Fee (as defined in Section 13).
 
     Also, commencing on February 18, 1998, representatives of Parent met
separately with members of senior management to discuss Parent's desire to
ensure that such senior managers and other significant employees of the Company
would continue with the Company following the acquisition. These discussions
continued through February 23, 1998. Although the parties did not reach any
legally binding obligation regarding employment arrangements and benefits for
senior management and significant employees of the Company after the Merger, the
parties each acknowledged that they currently expected that Mr. Slavin, Mr.
Auriemma, Jeffrey L. Kissling, the Company's Vice President, Development, Joe
Cowan, the Company's Vice President, Marketing, Victoria Stowe, Vice President,
Wonderware Studios, and Pankaj Mody, the Company's Chief Technology Officer
(each an "executive" and collectively, the "executives"), would be offered
employment benefits following the Merger on substantially the terms described
below. In addition, representatives of the Parent requested as a condition to,
and inducement for, entering into the Merger Agreement, and representatives of
the Company and the executives agreed, that the Company and each of the
executives enter into the consulting and non-competition agreements more fully
described under the heading "Consulting Agreements" in Section 13.
 
                                       12
<PAGE>   15
 
     The parties currently expect that each of the executives will enter into
new three-year employment agreements following the Merger, which will provide
for salary and annual bonus compensation on the same terms as are in place for
the current year, and retention bonuses which become payable over the three-year
term of the employment agreements (subject to forfeiture of the unpaid amounts
if an executive's employment is terminated for cause or if the executive resigns
prior to the end of the three-year term). It is currently anticipated that their
employment agreements will provide that the executives will be entitled to
receive retention bonuses of an aggregate of approximately $2 million for the
first full fiscal year during the employment term, approximately $3 million for
the second year, and approximately $3.4 million for the third year. It is
currently anticipated that the aggregate retention bonus pool for each year will
be allocated among the six executives so that Mr. Slavin receives approximately
50% of the total pool, Messrs. Auriemma, Cowan, and Kissling and Ms. Stowe each
receives approximately 11% and Mr. Mody receives approximately 6%.
 
     In addition, it is currently anticipated that each of the executives, and
approximately twenty other key employees to be designated by Mr. Slavin ("key
employees" and collectively with the executives, the "Holders"), will be
entitled to participate in two phantom stock plans pursuant to which all of the
Holders will be granted phantom units, which will vest over a three-year period
(subject to forfeiture if the Holder's employment is terminated for cause or if
the Holder resigns prior to the end of the third year). Of the total number of
units to be granted to the Holders under each plan, it is currently anticipated
that Mr. Slavin will receive approximately one-third, Messrs. Auriemma, Cowan
and Kissling and Ms. Stowe will each receive approximately 7%, Mr. Mody will
receive approximately 4%, and the key employees will receive in the aggregate
the remaining approximately one-third. The value attributed to units granted
under the plans is expected to be determined under two formulae which would be
intended to represent the notional increase in the value of the Company over the
first three years following the Merger. The formula that is expected to be used
under one of the plans would compare the value of the Company immediately before
the announcement of the Offer with a proposed multiple of the Company's
revenues. The formula expected to be used with the second plan would compare an
adjusted pre-Offer value of the Company with a proposed multiple of the
Company's earnings before interest and taxes. The ultimate value of awards under
the two plans would together represent 7.5% of the notional increase in the
Company's value during the three-year period as determined under the revenue and
earnings-based formulae.
 
     The Merger Agreement and the Consulting Agreements were executed and
delivered in the early morning on February 24, 1998.
 
     Following the Offer and the Merger, Parent intends to operate the Company
on a basis generally consistent with the Company's existing plans and programs.
 
12.  PURPOSE OF THE OFFER; THE MERGER; PLANS FOR THE COMPANY.
 
     The purpose of the Offer and the Merger is for Offeror to acquire control
of, and the entire equity interest in, the Company. The purpose of the Merger is
for Offeror to acquire all Shares not purchased pursuant to the Offer. Upon
consummation of the Merger, the Company will become a wholly owned subsidiary of
Offeror. The Offer is being made pursuant to the Merger Agreement.
 
     Under the Delaware General Corporation Law (the "DGCL"), the approval of
the Board of Directors of the Company and the affirmative vote of the holders of
a majority of the outstanding Shares are required to approve and adopt the
Merger Agreement and the transactions contemplated thereby, including the
Merger. The Board of Directors of the Company has unanimously approved and
adopted the Merger Agreement and the transactions contemplated thereby, and,
unless the Merger is consummated pursuant to the short-form merger provisions
under the DGCL described below, the only remaining required corporate action of
the Company is the approval and adoption of the Merger Agreement and the
transactions contemplated thereby by the affirmative vote of the holders of a
majority of the Shares. Accordingly, if the Minimum Condition is satisfied,
Offeror will have sufficient voting power to cause the approval and adoption of
the Merger Agreement and the transactions contemplated thereby without the
affirmative vote of any other stockholders.
 
     In the Merger Agreement, the Company has agreed to take all action
necessary to convene a meeting of its stockholders as soon as practicable after
the consummation of the Offer for the purpose of considering and taking action
on the Merger Agreement and the transactions contemplated thereby, if such
action is required by the DGCL. Parent and Offeror have agreed that all Shares
owned by them will be voted in favor of the Merger Agreement and the
transactions contemplated thereby.
 
     Board Representation.  If Offeror purchases a majority of the outstanding
Shares pursuant to the Offer, the Merger Agreement provides that Parent and
Offeror will be entitled to designate representatives to serve on the Board in
proportion to Offeror's ownership of Shares following such purchase. See Section
13. Parent currently intends to designate a majority of the directors of the
Company following consummation of the Offer. It is currently anticipated that
Parent will designate Allen M. Yurko, Dr. George W. Sarney, Roger Mann,
 
                                       13
<PAGE>   16
 
Colin P. Bonsey and James C. Bays or such other person listed on Annex I as
Parent shall determine, to serve as directors of the Company following
consummation of the Offer. See Annex I. Offeror expects that such representation
would permit Offeror to exert substantial influence over the Company's conduct
of its business and operations.
 
     Short Form Merger.  Under the DGCL, if Offeror acquires, pursuant to the
Offer, at least 90% of the outstanding Shares, Offeror will be able to approve
the Merger without a vote of the Company's stockholders. In such event, Parent
and Offeror anticipate that they will take all necessary and appropriate action
to cause the Merger to become effective as soon as reasonably practicable after
such acquisition, without a meeting of the Company's stockholders. If, however,
Offeror does not acquire at least 90% of the outstanding Shares pursuant to the
Offer or otherwise and a vote of the Company's stockholders is required under
the DGCL, a significantly longer period of time would be required to effect the
Merger. Pursuant to the Merger Agreement the Company has agreed to take all
action necessary under the DGCL and its certificate of incorporation and by-laws
to convene a meeting of its stockholders promptly following consummation of the
Offer to consider and vote on the Merger, if a stockholders' vote is required.
 
     Appraisal Rights.  No appraisal rights are available in connection with the
Offer. However, if the Merger is consummated, stockholders will have certain
rights under the DGCL to dissent and demand appraisal of, and to receive payment
in cash of the fair value of, their Shares. Such rights to dissent, if the
statutory procedures are complied with, could lead to a judicial determination
of the fair value of the Shares, as of the day prior to the date on which the
stockholders' vote was taken approving the Merger or similar business
combination (excluding any element of value arising from the accomplishment or
expectation of the Merger), required to be paid in cash to such dissenting
holders for their Shares. In addition, such dissenting stockholders would be
entitled to receive payment of a fair rate of interest from the date of
consummation of the Merger on the amount determined to be the fair value of
their Shares. In determining the fair value of the Shares, the court is required
to take into account all relevant factors. Accordingly, such determination could
be based upon considerations other than, or in addition to, the market value of
the Shares, including, among other things, asset values and earning capacity. In
Weinberger v. UOP, Inc., the Delaware Supreme Court stated, among other things,
that "proof of value by any techniques or methods which are generally considered
acceptable in the financial community and otherwise admissible in court" should
be considered in an appraisal proceeding. Therefore, the value so determined in
any appraisal proceeding could be the same as, or more or less than, the
purchase price per Share in the Offer or the Merger consideration.
 
     In addition, several decisions by Delaware courts have held that, in
certain circumstances, a controlling stockholder of a company involved in a
merger has a fiduciary duty to other stockholders which requires that the merger
be fair to such other stockholders. In determining whether a merger is fair to
minority stockholders, Delaware courts have considered, among other things, the
type and amount of consideration to be received by the stockholders and whether
there was fair dealing among the parties. The Delaware Supreme Court stated in
Weinberger and Rabkin v. Philip A. Hunt Chemical Corp. that the remedy
ordinarily available to minority stockholders in a cash-out merger is the right
to appraisal described above. However, a damages remedy or injunctive relief may
be available if a merger is found to be the product of procedural unfairness,
including fraud, misrepresentation or other misconduct.
 
     Rule 13e-3.  The Commission has adopted Rule 13e-3 under the Exchange Act
which is applicable to certain "going private" transactions and which may under
certain circumstances be applicable to the Merger or another business
combination following the purchase of Shares pursuant to the Offer or otherwise
in which Offeror seeks to acquire the remaining Shares not held by it. Offeror
believes, however, that Rule 13e-3 will not be applicable to the Merger, if the
Merger is consummated within one year after the Expiration Date at the same per
Share price as paid in the Offer. If applicable, Rule 13e-3 requires, among
other things, that certain financial information concerning the Company and
certain information relating to the fairness of the proposed transaction and the
consideration offered to minority stockholders in such transaction be filed with
the Commission and disclosed to stockholders prior to consummation of the
transaction.
 
     Plans for the Company.  Except as otherwise set forth in this Offer to
Purchase, it is expected that, initially following the Merger, the business and
operations of the Company will be continued by the Company substantially as they
are currently being conducted. Parent will continue to evaluate the business and
operations of the Company during the pendency of the Offer and after the
consummation of the Offer and the Merger, and will take such actions as it deems
appropriate under the circumstances then existing. Parent intends to seek
additional information about the Company during this period. Thereafter, Parent
intends to review such information as part of a comprehensive review of the
Company's business, operations, capitalization and management with a view to
optimizing exploitation of the Company's potential in conjunction with Parent's
businesses, particularly the businesses conducted by its Siebe Control Systems
division.
 
     In connection with granting Parent and its representatives access to
certain confidential information of the Company, Parent executed a
Confidentiality Agreement with the Company, dated February 17, 1998 (the
                                       14
<PAGE>   17
 
"Confidentiality Agreement"), that provides, among other things, that for a
period of eighteen months, (a) Parent will not make any public announcement with
respect to, or submit any proposal for, a transaction between the Company or any
of its security holders and Parent or any of its affiliates (other than in the
ordinary course of business), unless such proposal is directed and disclosed
solely to management of the Company or its designated representatives and the
Company shall have requested in advance in writing, the submission of each
proposal and (b) unless the Company shall have consented in advance in writing,
Parent and its successors will not directly or indirectly, by purchase or
otherwise, acquire, offer to acquire, or agree to acquire, ownership of any
securities or direct or indirect rights (including convertible securities) or
options to acquire such ownership of any securities of the Company or any of its
affiliates (or act in concert with others with respect thereto) or otherwise
seek to influence or control the management or policies of the Company or any of
its affiliates. The Company waived these provisions with respect to the Offer
and the Merger (or Subsequent Merger (as defined in Section 13)) and such
restrictions shall not apply following consummation of the Offer. In addition,
in the Merger Agreement, the Company has agreed that (i) following notification
to Parent of a specified written proposal from a third party and until any
Alternative Transaction (as defined in Section 13) resulting from such proposal
shall have been consummated or abandoned, Parent shall be entitled to propose or
present to the Company any offer in response to such third party's offer and
(ii) if prior to the Effective Time or termination of the Merger Agreement, any
third party announces an intention to commence, or commences, any tender offer
to acquire Shares, Parent and Offeror shall be entitled to make any public
announcement or proposal, or to take any other action, in response thereto.
 
     Except as indicated in this Offer to Purchase, neither Parent nor Offeror
have any present plans or proposals which relate to or would result in an
extraordinary corporate transaction, such as a merger, reorganization or
liquidation, involving the Company or any subsidiary, a sale or transfer of a
material amount of assets of the Company or any subsidiary or any material
change in the Company's capitalization or dividend policy or any other material
changes in the Company's corporate structure or business, or the composition of
the Company's Board of Directors or management.
 
13.  THE TRANSACTION DOCUMENTS.
 
  The Merger Agreement
 
     The Merger Agreement provides for the commencement of the Offer not later
than five business days after the execution of the Merger Agreement, provided
that certain of the conditions to the Offer have not occurred. Parent, Offeror
and the Company are required to use all reasonable efforts to take all action as
may be necessary or appropriate in order to effectuate the Offer and the Merger
as promptly as possible and to carry out the transactions provided for or
contemplated by the Merger Agreement.
 
     The Merger Agreement provides that, as soon as practicable after expiration
of the Offer and the receipt of any required approvals and adoption of the
Merger Agreement by the stockholders of the Company, to the extent required by
the DGCL, and the satisfaction or waiver, if possible, of certain other
conditions contained in the Merger Agreement, Merger Sub (or another direct or
indirect Delaware subsidiary of Parent) will be merged with and into the Company
(the "Merger"), with the Company continuing as the surviving corporation (the
"Surviving Corporation") in the Merger under the corporate name it possesses
immediately prior to the effective time of the Merger (the "Effective Time").
Notwithstanding the foregoing, the parties to the Merger Agreement have agreed
that Offeror may revise the structure of the Merger (including merging the
Company into Merger Sub or merging the Company with or into another direct or
indirect wholly-owned subsidiary of Parent) provided that any such restructuring
does not adversely affect the stockholders of the Company or cause the Company
to breach its representations and warranties under the Merger Agreement.
 
     In the Merger Agreement, the Company has agreed, if required by the DGCL,
in order to consummate the Merger, to take all action necessary in accordance
with the DGCL to convene a meeting of its stockholders promptly following
consummation of the Offer for the purpose of considering and approving the
Merger. The Company, acting through its Board of Directors, has further agreed
that if a stockholders' meeting is convened, the Board of Directors shall
recommend that stockholders of the Company vote in favor of the Merger and that
such recommendation shall not be withdrawn or adversely modified except by
resolution of the Board of Directors adopted in the exercise of applicable
fiduciary duties upon the advice of counsel. In the event that proxies are to be
solicited from the Company's stockholders, the Company shall, if and to the
extent requested by Offeror, subject to the exercise by the Company's Board of
Directors of its fiduciary duties, use its best efforts to solicit from
stockholders of the Company proxies in favor of the Merger, and to take all
other reasonable action necessary or, in the opinion of Offeror, helpful to
secure the vote of its stockholders in favor of the Merger. At any such meeting,
all of the Shares then owned by Offeror and by any of its subsidiaries and by
the Company will be voted in favor of the Merger.
 
     At the Effective Time, each Share issued and outstanding immediately prior
thereto shall be cancelled and extinguished and each Share (other than Shares
held in the treasury of the Company, Shares held by
 
                                       15
<PAGE>   18
 
Parent or any subsidiary thereof, and Shares with respect to which appraisal
rights are properly exercised ("Dissenting Shares")) shall, by virtue of the
Merger and without any action on the part of Offeror, the Company or the holders
of the Shares, be converted into the right to receive the Offer Price upon the
surrender of the certificate formerly representing such Share. Each share of
common stock of Merger Sub issued and outstanding immediately prior to the
Effective Time shall, at the Effective Time, by virtue of the Merger and without
any action on the part of Offeror, Merger Sub, the Company or the holders of
Shares, be converted into and shall thereafter evidence one validly issued and
outstanding share of common stock of the Surviving Corporation. In the Merger
Agreement, the Company has agreed that, on or before the Effective Time, each
holder of an outstanding option to purchase Shares (collectively the "Options")
whether held under any employee or non-employee compensation plan or arrangement
of the Company or other agreement or arrangement, whether or not then
exercisable, shall become fully exercisable and vested, and in lieu of
exercising such Options, the holders of Options shall, upon surrender for
cancellation of the same to the Company on or before the Effective Time, be
entitled to receive from the Company for each Share subject to such Option an
amount in cash equal to the excess, if any, of (a) the product of the number of
Shares covered by such Options multiplied by the Offer Price, over (b) the
product of the number of Shares covered by such Options multiplied by the
per-Share exercise price payable upon exercise, subject to any required
withholding taxes, and such Option will be cancelled; provided, that the
foregoing shall be subject to the obtaining of any necessary consents of Option
holders agreeing to cancel such Option. The Company has agreed in the Merger
\Agreement that, on or before the Effective Time, it shall use its best efforts
to obtain such consents and to make any changes in the Company's benefit plans
or rights granted thereunder that are necessary.
 
     The obligations of the parties to effect the Merger following completion of
the Offer are subject to the following conditions:
 
          (i) The Merger shall have been approved and adopted by the vote of the
     stockholders of the Company to the extent required by the DGCL;
 
          (ii) All waiting, review and investigation periods (and any extension
     thereof) applicable to the consummation of the Merger under the Hart-Scott
     Rodino Antitrust Improvements Act of 1976, as amended (the
     "Hart-Scott-Rodino Act") shall have expired or been terminated;
 
          (iii) There shall have been no law, statute, rule or order, domestic
     or foreign, enacted or promulgated which would make consummation of the
     Merger illegal; and
 
          (iv) No injunction or other order entered by a United States (state or
     federal) court of competent jurisdiction shall have been issued and remain
     in effect which would prohibit consummation of the Merger.
 
     The Merger Agreement provides that, if the Offer is terminated by Offeror
as a result of a failure of the conditions of the Offer (see Section 15) to be
satisfied, Parent and Offeror shall have the right, but not the obligation, to
notify the Company that it or they desire, subject to the prior written approval
of the Board of Directors of the Company, to seek approval of the Company's
stockholders for the Merger pursuant to the DGCL. Unless the Company's Board of
Directors determines, upon advice of counsel, that such actions would have a
material adverse economic effect on the Company's stockholders, or that
cooperation by the Company would constitute a breach of fiduciary duty by the
Company's Board of Directors, the Company shall take all necessary actions to
obtain stockholder approval and to accomplish the Merger (the "Subsequent
Merger"), except as otherwise required by the fiduciary duties of the Company's
Board of Directors. In such case, in addition to the conditions to the Merger
set forth above, the Subsequent Merger will also be subject to the following
conditions:
 
          (a) The representations and warranties of the Company contained in the
     Merger Agreement shall have been true and correct in all material respects
     when made;
 
          (b) There shall not have occurred, after February 24, 1998, any event,
     condition or state of facts, which has resulted, or is reasonably likely to
     result, in (i) a material adverse effect on the financial condition,
     properties, business, or results of operations of the Company or the
     Surviving Corporation, and their respective subsidiaries taken as a whole
     (a "Company Material Adverse Effect") or (ii) a material adverse effect on
     the ability of Parent, Offeror or Merger Sub to consummate the Merger;
 
          (c) All Options shall have been exercised, cancelled or terminated
     prior to or concurrently with the Effective Time; and
 
          (d) There shall not be pending or threatened any action, proceeding or
     investigation by any court or governmental or regulatory authority or body
     (i) challenging or seeking damages in connection with the Subsequent
     Merger, (ii) seeking to require the divestiture by Parent, Offeror or the
     Company or any of their respective affiliates of Shares or any business,
     asset or property of Parent or the Company or any of their respective
     affiliates, or (iii) seeking to restrain or prohibit the consummation of
     the Subsequent
                                       16
<PAGE>   19
 
     Merger or otherwise limit the right of Parent, or its subsidiaries to
     transact business with the Company or otherwise own or operate in the
     current manner all or any portion of the businesses or assets of the
     Company or its subsidiaries, which, in either case, is reasonably likely to
     have a Company Material Adverse Effect prior to or after the Effective
     Time, or to subject the Company, Parent, Offeror, Merger Sub or any of
     their respective subsidiaries or any of their respective officers or
     directors to substantial penalties or criminal liability.
 
     In the Merger Agreement, the Company has agreed that simultaneously with,
or as promptly as possible after, the commencement of the Offer, it will file
with the Commission and promptly mail to its stockholders, a
Solicitation/Recommendation Statement on Schedule 14D-9 (the "Schedule 14D-9")
containing the recommendation of the Board of Directors that the Company's
stockholders accept the Offer, tender their Shares thereunder to Offeror and, if
required by applicable law, approve the Merger; provided, that such
recommendation may be withdrawn or modified to the extent the Board of Directors
determines to do so in the exercise of its fiduciary duties, based upon the
advice of counsel.
 
     The Merger Agreement provides that promptly upon the payment by Offeror or
any of Parent's direct or indirect subsidiaries pursuant to the Offer for such
number of Shares which represents at least a majority of the outstanding Shares,
and from time to time thereafter, Offeror shall be entitled to designate members
of the Board of Directors such that Offeror, subject to the provisions of
Section 14(f) of the Exchange Act, will have a number of representatives on the
Board of Directors, rounded up to the next whole number, equal to the product
obtained by multiplying nine (9) by the percentage of Shares beneficially owned
by Parent and any of its subsidiaries. The Company has agreed, upon the request
of Offeror, to promptly increase the size of the Board of Directors as permitted
in accordance with the Certificate of Incorporation of the Company and/or use
its best efforts to secure the resignations of such number of directors as is
necessary to enable Offeror's designees to be elected to the Board of Directors
and has agreed to use its best efforts to cause Offeror's designees to be so
elected. The Company has agreed, at the request of Offeror and at its expense,
to take all actions necessary to effect any such election, including the mailing
to its stockholders of the information required by Section 14(f) of the Exchange
Act and Rule 14f-1 promulgated thereunder, in form and substance reasonably
satisfactory to Offeror and its counsel.
 
     Parent currently intends to designate a majority of the directors of the
Company following consummation of the Offer. It is currently anticipated that
Parent will designate Messrs. Yurko, Mann, Bonsey, and Bays and Dr. Sarney to
serve as directors of the Company following consummation of the Offer. See Annex
I.
 
     In the Merger Agreement, the Company has made customary representations and
warranties to Parent, Offeror and Merger Sub, including, but not limited to,
representations and warranties relating to the Company's organization and
qualification, capitalization and authority to enter into the Merger Agreement
and carry out the related transactions, the Company's subsidiaries, Commission
filings (including financial statements), the documents supplied by the Company
relating to the Offer, required consents and approvals, employee benefit plans,
litigation, the material liabilities of the Company and its subsidiaries,
environmental matters relating to the Company and its subsidiaries, labor
matters, trademarks, patents and other intellectual property, the payment of
taxes, arrangements with financial advisors, the Rights Agreement, the absence
of product liability claims, related party transactions, and the absence of
certain material adverse changes or events since December 31, 1997.
 
     In the Merger Agreement, the Company agreed to take, by March 1, 1998, all
action necessary to render the Rights Agreement inapplicable to the Offer, the
Merger, the Merger Agreement and the transactions contemplated thereby or
therein.
 
     Parent, Offeror and Merger Sub have also made customary representations and
warranties to the Company, including, but not limited to, representations and
warranties relating to Parent's, Offeror's and Merger Sub's organization and
qualification, their authority to enter into the Merger Agreement and consummate
the Offer and the Merger, required consents and approvals, documents related to
the Offer, the applicability of certain margin rules and the availability of
sufficient financing to consummate the Offer.
 
     Pursuant to the Merger Agreement, the Company has agreed that, prior to the
Effective Time, unless Offeror shall otherwise have agreed in writing or as
otherwise contemplated by the Merger Agreement, the Company will (i) carry on
the business of the Company and its subsidiaries only in, and will maintain its
and its subsidiaries facilities in, the ordinary course of business and
consistent with past practice, (ii) use its reasonable efforts and shall cause
its subsidiaries to use reasonable efforts, to preserve intact their respective
business organizations and goodwill, keep available the services of their
current officers and employees as a group and maintain satisfactory
relationships with customers, suppliers, distributors and others having business
dealings with them, (iii) confer on a regular and frequent basis with
representatives of Offeror and Merger Sub to report operational matters and the
general status of ongoing operations, (iv) not take any action which would
render, or which reasonably may be expected to render, any representation or
warranty made by the
 
                                       17
<PAGE>   20
 
Company in the Merger Agreement untrue at any time prior to the Effective Time,
and (v) notify Offeror and Merger Sub of any emergency or other change in the
normal course of the Company's or any of its subsidiaries' business or in the
operation of the Company's or the subsidiaries' properties and of any
governmental or third party complaints, investigations or hearings (or
communications indicating that the same may be contemplated) if such emergency,
change, complaint, investigation or hearing would have a Company Material
Adverse Effect or would materially adversely affect any party's ability to
consummate the transaction contemplated by the Merger Agreement.
 
     The Company has also agreed pursuant to the Merger Agreement that, prior to
the Effective Time, it will not directly or indirectly do or permit to occur any
of the following: (i) issue, sell, pledge, dispose of or encumber (or permit any
of its subsidiaries to issue, sell, pledge, dispose of or encumber) any shares
of, or any options, warrants, conversion privileges or rights of any kind to
acquire any shares of any capital stock of the Company or any of its
subsidiaries (other than shares issuable upon exercise of the outstanding (as of
the date of the Merger Agreement) Options or rights to purchase Shares pursuant
to the Company's Employee Stock Purchase Plan, in each case in accordance with
their terms in effect on the date of the Merger Agreement); (ii) amend or
propose to amend the Certificate or Articles of Incorporation or By-Laws of the
Company or any of its subsidiaries; (iii) split, combine or reclassify any
outstanding Shares, or declare, set aside or pay any dividend or other
distribution payable in cash, stock, property or otherwise with respect to the
Shares; (iv) redeem, purchase or acquire or offer to acquire (or permit any of
its subsidiaries to redeem, purchase or acquire or offer to acquire) any Shares
or other securities of the Company or any of its subsidiaries other than as
contemplated by the Merger Agreement and other than for the repurchase by the
Company, pursuant to existing agreements, of any outstanding Shares upon
termination of any employment, director or consulting relationship with the
Company; or (v) enter into or modify any agreement, commitment or arrangement
with respect to any of the foregoing.
 
     Pursuant to the Merger Agreement, the Company has agreed that neither the
Company nor any of the subsidiaries shall: (i) sell, pledge, lease, dispose of
or encumber any material assets other than in the ordinary course of business
consistent with past practice; (ii) acquire (by merger, consolidation,
acquisition of stock or assets or otherwise) any corporation, partnership or
other business organization or enterprise or material assets thereof; (iii)
incur any indebtedness for borrowed money or issue any debt securities except
for borrowings in the ordinary course of business and consistent with past
practice; (iv) guarantee, endorse or otherwise become liable or responsible
(whether directly, contingently or otherwise) for the obligations of any other
person (other than a subsidiary of the Company or the Company) except in the
ordinary course of business consistent with past practice and in amounts
immaterial to the Company; (v) enter into or modify any contract, agreement,
commitment or arrangement with respect to any of the foregoing; (vi) enter into
or modify any employment, severance or similar agreements or arrangements with,
or grant any bonuses, salary increases, severance or termination pay to, any
officers or directors; (vii) in the case of employees who are not officers or
directors, take any action other than in the ordinary course of business
consistent with past practice (none of which actions shall be unreasonable or
unusual) with respect to the grant of any bonuses, salary increases, severance
or termination pay or with respect to any increase of benefits in effect on the
date of the Merger Agreement; or (viii) adopt or amend any bonus, profit
sharing, compensation, stock option, pension, retirement, deferred compensation,
employment or other employee benefit plan, agreement, trust fund or arrangement
for the benefit or welfare of any employee.
 
     In addition, the Company has agreed that it will not (i) except to the
extent required by fiduciary obligations under applicable law and as advised by
counsel, call any meeting (other than as contemplated by the Merger Agreement)
of its stockholders or waive or modify any provision of, or terminate any,
confidentiality or standstill agreement entered into by the Company with any
person; and (ii) except as expressly contemplated in the Merger Agreement,
modify or accelerate the exercisability of any Options, rights or warrants
presently outstanding, and shall not amend, change or waive (or exempt any
person from the effect of) the Rights Agreement, except in the exercise of the
fiduciary duties of the Company's Board of Directors or as expressly
contemplated by the Merger Agreement.
 
     The Company has also agreed that neither it nor any of its subsidiaries
will: (i) adopt a plan of liquidation, dissolution, merger, consolidation,
restructuring, recapitalization or reorganization; or (ii) make any material tax
election or settle or compromise any material federal, state, local or foreign
tax liability, except in the ordinary course of business consistent with past
practice. In addition, the Merger Agreement also requires the Company to use its
best efforts to cause its current insurance (or reinsurance) policies not to be
cancelled or terminated or any of the coverage thereunder to lapse, unless
simultaneously with such termination, cancellation or lapse, replacement
policies providing coverage equal to or greater than the coverage under the
cancelled, terminated or lapsed policies for substantially similar premiums are
in full force and effect.
 
     The Company has agreed in the Merger Agreement that from the date of the
Merger Agreement until the Effective Time or the termination of the Merger
Agreement, the Company will not, directly or indirectly,
 
                                       18
<PAGE>   21
 
through any of its affiliates, officers, directors or agents, or otherwise
solicit, initiate or encourage any proposals or offers from any other person
other than Parent or its affiliates (a "third party") relating to any possible
acquisition of the Company or any of its subsidiaries (whether by way of merger,
purchase of capital stock, purchase of assets, or otherwise), or engage in any
sale of any equity interest in or substantial assets of the Company or any of
its subsidiaries (other than pursuant to the exercise of options or warrants
outstanding on the date of the Merger Agreement) to a third party (an
"Alternative Transaction"), nor will the Company participate in any negotiations
regarding, or furnish to any person any information with respect to, or
otherwise cooperate with, facilitate or encourage any effort or attempt by any
person to do or seek an Alternative Transaction ("Non-Solicitation
Obligations"). However, the Company may participate in negotiations with or
furnish information to a third party in response to a written proposal if the
Company notifies Parent in writing of the receipt of such proposal and if the
Board of Directors reasonably believes, upon the advice of independent counsel,
that the failure to do so would constitute a breach of its fiduciary duties. In
the event such a proposal is determined by the Board of Directors based on the
advice of the Company's outside financial advisors to be on terms financially
superior to its stockholders as compared with the Offer and the Merger (a "Bona
Fide Offer"), the Company may terminate the Merger Agreement and must pay the
Termination Fee (as hereinafter defined).
 
     Parent has agreed in the Merger Agreement to cause the Surviving
Corporation to maintain, for six years from the date Parent, Offeror and Merger
Sub together acquire a majority of the Shares, all rights to indemnification
existing in favor of the directors, officers, employees and agents of the
Company pursuant to the Company's By-Laws at or prior to the Effective Time,
unless required by law. Parent has also agreed in the Merger Agreement to cause
the Surviving Corporation, to use its reasonable best efforts to maintain in
full force and effect for a period of six years from the Effective Time if
available directors' and officers' liability insurance, containing terms and
provisions comparable to the terms and provisions of the current policy
maintained by the Company, for the benefit of existing and former officers,
directors, employees and agents of the Company, but only to the extent
obtainable at a cost not more than 20% greater than that incurred by the Company
on the date of the Merger Agreement (the "Insurance Cap"). If such premiums for
insurance would at any time exceed the Insurance Cap, then the Surviving
Corporation shall cause to be maintained policies of insurance which, in the
Surviving Corporation's good faith determination, provide the maximum coverage
available for a premium equal to the Insurance Cap.
 
     Pursuant to the Merger Agreement, the Company has agreed to take such
actions, on or before the Effective Time, as are necessary to terminate the
Company's Employee Stock Purchase Plan. After such termination, any employee who
is a participant in the Company's Employee Stock Purchase Plan will not be
permitted to continue to have the Company withhold any monies for investment in
such plan and each such employee will be permitted to elect to receive invested
cash or purchase Shares in accordance with the terms of such plan.
 
     In addition, Parent has agreed that it will cause the Company to honor
without modification (except to the extent modified by the mutual agreement of
the parties) all employment agreements and severance agreements in effect prior
to the date of the Merger Agreement between the Company and any employee of the
Company, all of which the Company has represented to have been disclosed in
writing to Parent prior to the date of the Merger Agreement.
 
     The Merger Agreement provides that it may be terminated at any time prior
to the consummation of the Offer or, if the Offer has been terminated and Parent
and Offeror determine to seek to consummate the Subsequent Merger, the Effective
Time, (a) by mutual consent of the Boards of Directors of Parent and the
Company, (b) by either Offeror or the Company if the Offer shall not have been
consummated on or before May 31, 1998 or a Subsequent Merger shall not have
occurred by September 30, 1998; provided, however, that a party shall not be
entitled to terminate the Merger Agreement pursuant to such provision if such
party is in material breach of its obligations under the Merger Agreement, (c)
by Offeror if the Board of Directors of the Company shall have withdrawn or
adversely modified either its recommendation of the Offer or the Merger,
provided that a finding by the Company's Board of Directors that an Alternative
Acquisition may be superior from a financial point of view shall not be deemed a
withdrawal or adverse modification of its recommendation unless such finding is
publicly stated or otherwise disseminated, (d) by Offeror prior to the purchase
of Shares pursuant to the Offer in the event that the conditions to the Offer
set forth in the Merger Agreement shall not have been satisfied, or (e) by the
Company if (i) the Offer shall not have commenced substantially in accordance
with the terms of the Merger Agreement; (ii) the Offer shall have expired or
been terminated without any Shares having been purchased thereunder, or (iii) a
tender offer for Shares is commenced by a person or entity, or the Company
receives an offer for an Alternative Transaction, in the case of any of which
the Company's Board of Directors determines, in the exercise of its fiduciary
duties and subject to compliance with the Merger Agreement, makes necessary or
advisable the termination of the Merger Agreement; provided that the provisions
of the Merger Agreement relating to the Termination Fee and allowing Parent to
make proposals in response to third-party offers shall survive termination of
the Merger Agreement pursuant to such
                                       19
<PAGE>   22
 
provision. If the Merger Agreement is terminated (a) the Merger Agreement will
become void and there will be no liability or further obligation on the part of
Parent, Offeror, Merger Sub or the Company (except as described below) or their
respective stockholders, officers or directors, except for expense
reimbursement, confidentiality obligations, and the standstill obligations of
the parties and (b) Offeror and Merger Sub shall terminate the Offer, if still
pending, without purchasing any Shares thereunder.
 
     The Company has agreed in the Merger Agreement that if the Merger Agreement
is terminated (a) by the Company pursuant to clause (e)(iii) of the preceding
paragraph or because it has received a Bona Fide Offer, (b) by Offeror because
the Company's Board of Directors has withdrawn or adversely modified its
recommendation in favor of the Offer and the Merger, or (c) pursuant to its
terms for any reason other than a material breach of the Merger Agreement by
Parent or Merger Sub and, in case of a termination described in the foregoing
clause (c) within six months thereafter either (x) a definitive agreement is
entered into between the Company and any person other than Offeror or any
affiliate of Offeror for the acquisition of all or substantially all of the
assets or a majority of the capital stock of the Company, or for a merger,
consolidation or other reorganization of the Company at a price equivalent to a
price per Share in excess of $24.00, or (y) any person or "group" (as that term
is used in Section 13(d)(3) of the Exchange Act) other than Offeror or any
affiliate of Offeror acquires by way of a public tender offer beneficial
ownership of 50% or more of the outstanding Shares at a price per Share in
excess of $24.00, then the Company shall pay to Parent upon demand the amount of
$12.6 million (the "Termination Fee") to compensate Parent, Offeror and Merger
Sub for taking actions to consummate the Merger Agreement, to reimburse them for
the time and expense relating thereto and for other direct or indirect costs in
connection with the transactions contemplated by the Merger Agreement. If the
Company fails to pay the Termination Fee promptly when due, the Company has
agreed to pay to Parent all costs and expenses (including attorneys' fees and
expenses) incurred by Parent in connection with the collection of the
Termination Fee, together with interest from the date the Termination Fee was
due until such time as payment is received by Parent at the lesser of 10% per
annum or the maximum rate permitted by law.
 
     The Merger Agreement further provides that in the event of a material
breach (other than a willful and knowing breach by the Company or any of its
representatives of its Non-Solicitation Obligations) by either Parent, Offeror
and Merger Sub, on the one hand, and the Company, on the other hand, the
breaching party's liability for any damages incurred by the nonbreaching party
shall not exceed $12.6 million.
 
     The foregoing is a summary of certain provisions of the Merger Agreement, a
copy of which has been filed as an exhibit to the Schedule 14D-1 and which is
available in the manner set forth in Section 8. Such summary is qualified in its
entirety by reference to the text of such agreements.
 
  The Consulting Agreements
 
     As a condition and inducement to entering into the Merger Agreement, the
Parent requested that the Company enter into agreements (the "Consulting
Agreements") with each of Messrs. Slavin, Auriemma, Kissling, Cowan and Mody,
and Ms. Stowe. The Consulting Agreements become effective upon consummation of
the Offer, and provide that if the employee resigns from the Company, he or she
agrees to serve as a consultant to the Company for a period of two years, for
compensation of $25,000 per year. In order to induce Mr. Kissling to enter into
his consulting agreement, his agreement also provides that he will be entitled
to a one-time payment of $60,000 upon consummation of the Offer. During the term
of the consulting arrangement, the consultant will not be permitted to directly
or indirectly, own, manage, operate, join, control, be employed by, or
participate in the ownership, management, operation or control of, any Competing
Enterprise (defined as any person or entity engaged in the development,
marketing and sale of industrial automation and process control software
products or other business conducted by the Company or the Siebe Control Systems
division of Parent); provided, however, that the employee may own 2% or less of
any class of equity securities of an entity that has a class of equity
securities registered under Section 12 of the Exchange Act. The Consulting
Agreements also (i) contain confidentiality restrictions and (ii) provide that
during the consulting period, the employee shall not interfere with the
Company's relationship with, or endeavor to entice away from the Company, any
person who at any time during the consulting period was an employee or customer
of the Company or otherwise had a material business relationship with the
Company.
 
14.  DIVIDENDS AND DISTRIBUTIONS.
 
     The Merger Agreement provides that neither the Company nor any of its
subsidiaries will, among other things, (a) issue, sell, pledge, dispose of or
encumber (or permit any of its subsidiaries to issue, sell, pledge, dispose of
or encumber) any shares of, or any options, warrants, conversion privileges or
rights of any kind to acquire any shares of any capital stock of the Company of
any of its subsidiaries (other than shares issuable upon exercise of the
outstanding (as of the date of the Merger Agreement) Options or any rights to
purchase Shares pursuant to the Company's Employee Stock Purchase Plan, in each
case in accordance with their
 
                                       20
<PAGE>   23
 
respective terms in effect on the date of the Merger Agreement); (b) split,
combine or reclassify any outstanding Shares, or declare, set aside or pay any
dividend or other distribution payable in cash, stock, property or otherwise
with respect to the Shares; or (c) redeem, purchase or acquire or offer to
acquire (or permit any of its subsidiaries to redeem, purchase or acquire or
offer to acquire) any Shares or other securities of the Company or any of its
subsidiaries other than as contemplated by the Merger Agreement and other than
for the repurchase by the Company, pursuant to existing agreements, of any
outstanding Shares upon termination of any employment, director or consulting
relationship with the Company. See Section 13.
 
15.  CERTAIN CONDITIONS TO OFFEROR'S OBLIGATIONS.
 
     Offeror shall not be required to commence or continue the Offer or accept
for payment, purchase or pay for any Shares tendered, or may postpone the
acceptance, purchase or payment for Shares, or may amend (to the extent
permitted by the Merger Agreement) or terminate the Offer (1) if the Minimum
Condition is not satisfied as of the expiration of the Offer; (2) any applicable
waiting period under the Hart-Scott-Rodino Act in respect of the Offer shall not
have expired or have been terminated prior to the expiration of the Offer
(provided, however, that Offeror shall extend the expiration date of the Offer
from time to time until May 31, 1998, if, when and as necessary to satisfy any
request by the Federal Trade Commission (the "FTC") or the Department of
Justice, Antitrust Division (the "Division") for additional information under
the Hart-Scott-Rodino Act) or (3) if, at any time on or after February 24, 1998
and prior to the time of payment for any such Shares (whether or not any Shares
have theretofore been accepted for payment or paid for pursuant to the Offer),
any of the following events shall have occurred (each of paragraphs (a) through
(i) providing a separate and independent condition to Offeror's obligations
pursuant to the Offer):
 
          (a) the Company or any subsidiary of the Company shall have
     authorized, recommended or proposed, or shall have announced an intention
     to authorize, recommend or propose, or shall have entered into an agreement
     or agreement in principle with respect to, any merger, consolidation or
     business combination (other than the Merger), any acquisition or
     disposition of a material amount of assets or securities or any material
     change in its capitalization, the Company's Board of Directors shall have
     withdrawn or adversely modified (including by amendment to the Schedule
     14D-9) its favorable recommendations with respect to the Offer and the
     Merger, or any corporation, entity, "group" or "person" (as defined in the
     Exchange Act) other than Parent, Offeror or Merger Sub, shall have acquired
     beneficial ownership of more than 50% of the outstanding Shares;
 
          (b) the Company or any of its subsidiaries shall have authorized,
     recommended or proposed, or shall have announced an intention to authorize,
     recommend or propose, or shall have entered into an agreement or agreement
     in principle with respect to, any release or relinquishment of any material
     contract rights not in the ordinary course of business, which release or
     relinquishment would have a Company Material Adverse Effect.
 
          (c) there shall be instituted or pending any action, litigation,
     proceeding, investigation or other application before any court of
     competent jurisdiction or other governmental entity by any governmental
     entity that is reasonably likely to: (i) result in a restriction or
     prohibition on the consummation of the transactions contemplated by the
     Offer or the Merger; (ii) prohibit, or impose any material limitations on
     Offeror's or Merger Sub's ownership or operation of all or a material
     portion of their or the Company's business or assets, or to compel Offeror
     or Merger Sub to dispose of or hold separate all or a material portion of
     Offeror's or Merger Sub's or the Company's business or assets; (iii) make
     the acceptance for payment of, purchase of, or payment for, some or all of
     the Shares illegal or rendering Offeror or Merger Sub unable to, or
     restricting or prohibiting, the ability of Offeror or Merger Sub to accept
     for payment, purchase or pay for some or all of the Shares; or (iv) impose
     material limitations on the ability of Offeror or Merger Sub effectively to
     acquire or hold or to exercise full rights of ownership of the Shares
     including, without limitation, the right to vote the Shares purchased by
     them on an equal basis with all other Shares on all matters properly
     presented to the stockholders of the Company;
 
          (d) any statute, rule, regulation, order or injunction shall be
     enacted, promulgated, entered, enforced or deemed to or become applicable
     to the Offer or the Merger that results in any of the consequences referred
     to in clauses (i) through (iv) of paragraph (c) above;
 
          (e) there shall have occurred (i) any general suspension of, or
     limitation on prices for, trading in securities on any national securities
     exchange or in the over the counter market in the United States or on the
     London Stock Exchange, (ii) the declaration of a banking moratorium or any
     suspension of payments in respect of banks in the United States or the
     United Kingdom, (iii) the commencement of war, armed hostilities or other
     military action, or other international or national calamity, having a
     Company Material Adverse Effect, (iv) any limitation of any governmental
     authority on, or any other event which might materially adversely affect,
     the extension of credit by banks or other lending institutions in the
     United States or the United Kingdom, (v) from the date of the Merger
     Agreement through the close of business
                                       21
<PAGE>   24
 
     on the business day immediately prior to the date of termination or
     scheduled expiration of the Offer, a decline of at least 25% in the
     Standard & Poor's 500 Index, or (vi) in the case of any of the foregoing
     existing at the time of the commencement of the Offer, a material
     acceleration or worsening thereof;
 
          (f) except as set forth in the Company's reports, proxy statements;
     registration statements and other documents filed with the Commission prior
     to February 24, 1998 or the disclosure schedule to the Merger Agreement,
     any change shall have occurred which individually or in the aggregate had,
     is continuing to have, or is reasonably likely to have a Company Material
     Adverse Effect;
 
          (g) the representations and warranties of the Company in the Merger
     Agreement shall not have been true and correct in all material respects
     when made, or the Company shall not have performed in all material respects
     each material covenant and complied with each material agreement to be
     performed and complied with by it under the Merger Agreement provided that
     if the breach of any such covenant or agreement is cured within 5 calendar
     days after notice by the Offeror of its intent to terminate the Offer or if
     the breach shall not have a Company Material Adverse Effect or a material
     adverse effect on the ability of Parent or the Offeror to consummate the
     Offer, the Merger, or the transactions contemplated by the Merger
     Agreement, the Offeror shall not terminate the Offer;
 
          (h) the Company and Offeror shall have reached an agreement or
     understanding regarding termination of the Offer or the Merger Agreement
     shall have been terminated in accordance with its terms; or
 
          (i) all governmental consents required to be obtained in connection
     with the purchase of Shares pursuant to the Offer shall not have been
     obtained or any governmental agency shall have announced an intention to
     seek to prohibit or interfere with the purchase of Shares pursuant to the
     Offer;
 
which, in the good faith judgment of Offeror, in any such case, and regardless
of the circumstances giving rise to any such condition, make it inadvisable to
proceed with acceptance for payment or purchase of or payment for the Shares.
 
     The foregoing conditions are for the sole benefit of Offeror and Parent and
may be asserted by Offeror and Parent regardless of the circumstances giving
rise to such conditions, or may be waived by Offeror or Merger Sub in whole at
any time or in part from time to time in their sole discretion. The failure by
Offeror or Parent at any time to exercise any of the foregoing rights shall not
be deemed a waiver of any such right and each such right shall be deemed an
ongoing right and may be asserted at any time and from time to time. Any
determination by Offeror concerning the conditions described in this Section
shall be final and binding upon all parties.
 
16.  CERTAIN REGULATORY AND LEGAL MATTERS.
 
     Except as set forth in this Section, Offeror is not aware of any approval
or other action by any governmental or administrative agency which would be
required for the acquisition or ownership of Shares by Offeror as contemplated
herein. Should any such approval or other action be required, it will be sought,
but Offeror has no current intention to delay the purchase of Shares tendered
pursuant to the Offer pending the outcome of any such matter, subject, however,
to Offeror's right to decline to purchase Shares if any of the conditions
specified in Section 15 shall have occurred. There can be no assurance that any
such approval or other action, if needed, would be obtained or would be obtained
without substantial conditions, or that adverse consequences might not result to
the Company's business or that certain parts of the Company's business might not
have to be disposed of if any such approvals were not obtained or other action
taken.
 
     Antitrust.  The Hart-Scott-Rodino Act provides that the acquisition of
Shares by Offeror may not be consummated unless certain information has been
furnished to the Division (the "Division") and the FTC and certain waiting
period requirements have been satisfied. The rules promulgated by the FTC under
the Hart-Scott-Rodino-Act require the filing of a Notification and Report Form
(the "Form") with the Division and the FTC and that the acquisition of Shares
under the Offer may not be consummated until 15 days after receipt of the Form
by the Division and the FTC. Within such 15 day period the Division or the FTC
may request additional information or documentary material from Offeror. In the
event of such request the acquisition of Shares under the Offer may not be
consummated until 10 days after receipt of such additional information or
documentary material by the Division or the FTC. Offeror filed its Form with the
Division and the FTC on February 27, 1998. The Company advised the Offeror that
the Company expects to file its Form with the Division and the FTC on March 2,
1998.
 
     If any applicable waiting period under the Hart-Scott-Rodino Act in respect
of the Offer has not expired or been terminated prior to the Expiration Date,
Offeror has agreed in the Merger Agreement to extend the Expiration Date from
time to time until May 31, 1998, if, when and as necessary to satisfy any
request by the FTC or the Division under the Hart-Scott-Rodino Act. See Section
15.
 
                                       22
<PAGE>   25
 
     Federal Reserve Board Regulations.  Federal Reserve Board Regulations G, T,
U and X (the "Margin Regulations") promulgated by the Federal Reserve Board
place restrictions on the amount of credit that may be extended for the purpose
of purchasing margin stock (including the Shares) if such credit is secured
directly or indirectly by margin stock. Because, among other reasons, Parent's
Revolving Credit Agreement is unsecured, Parent and Offeror believe the
financing for the acquisition of the Shares will comply with the Margin
Regulations.
 
     State Takeover Laws.  The Company is incorporated under the laws of the
State of Delaware. In general, Section 203 of the DGCL prevents an "interested
stockholder" (generally a person who owns or has the right to acquire 15% or
more of a corporation's outstanding voting stock, or an affiliate or associate
thereof) from engaging in a "business combination" (defined to include mergers
and certain other transactions) with a Delaware corporation for a period of
three years following the date such person became an interested stockholder
unless, among other things, prior to such date the board of directors of the
corporation approved either the business combination or the transaction in which
the interested stockholder became an interested stockholder. On February 22,
1998, prior to the execution of the Merger Agreement, the Board of Directors of
the Company, by unanimous vote of all directors present at a meeting held on
such date, (i) approved and adopted the Merger Agreement and the transactions
contemplated thereby, (ii) determined that the Merger Agreement and the
transactions contemplated thereby, including each of the Offer and the Merger,
is fair to and in the best interests of, the stockholders of the Company and
(iii) recommended that the stockholders of the Company accept the Offer and
approve and adopt the Merger Agreement and the transactions contemplated
thereby. Accordingly, Section 203 is inapplicable to the Offer and the Merger.
 
     A number of other states have adopted laws and regulations applicable to
attempts to acquire securities of corporations which are incorporated, or have
substantial assets, stockholders, principal executive offices or principal
places of business, or whose business operations otherwise have substantial
economic effects, in such states. In Edgar v. MITE Corp., the Supreme Court of
the United States invalidated on constitutional grounds the Illinois Business
Takeover Statute, which, as a matter of state securities law, made takeovers of
corporations meeting certain requirements more difficult. However, in 1987 in
CTS Corp. v. Dynamics Corp. of America, the Supreme Court held that the State of
Indiana may, as a matter of corporate law and, in particular, with respect to
those aspects of corporate law concerning corporate governance, constitutionally
disqualify a potential acquiror from voting on the affairs of a target
corporation without the prior approval of the remaining stockholders. The state
law before the Supreme Court was by its terms applicable only to corporations
that had a substantial number of stockholders in the state and were incorporated
there.
 
     The Company, directly or through subsidiaries, conducts business in a
number of states throughout the United States, some of which have enacted
takeover laws. Offeror does not know whether any of these laws will, by their
terms, apply to the Offer or the Merger and has not complied with any such laws.
Should any person seek to apply any state takeover law, Offeror will take such
action as then appears desirable, which may include challenging the validity or
applicability of any such statute in appropriate court proceedings. In the event
it is asserted that one or more state takeover laws is applicable to the Offer
or the Merger, and an appropriate court does not determine that it is
inapplicable or invalid as applied to the Offer, Offeror might be required to
file certain information with, or receive approvals from, the relevant state
authorities. In addition, if enjoined, Offeror might be unable to accept for
payment any Shares tendered pursuant to the Offer, or be delayed in continuing
or consummating the Offer and the Merger. In such case, Offeror may not be
obligated to accept for payment any Shares tendered. See Section 15.
 
17.  FEES AND EXPENSES.
 
     Neither Offeror nor Parent will pay any fees or commissions to any broker
or dealer or other person (other than the Dealer Manager) for soliciting tenders
of Shares pursuant to the Offer. Brokers, dealers, commercial banks and trust
companies will, upon request, be reimbursed by Offeror for customary mailing and
handling expenses incurred by them in forwarding material to their customers.
 
     Merrill Lynch is acting as Dealer Manager in connection with the Offer and
has provided certain financial advisory services to Parent in connection with
the proposed acquisition of the Company. Parent has agreed to pay Merrill Lynch
a commencement fee of $1 million, which is currently payable and a transaction
fee of $3 million (against which the commencement fee will be credited). The
transaction fee will become payable in the event Offeror acquires more than a
majority of the outstanding Shares. In addition, Parent has agreed to reimburse
Merrill Lynch for all reasonable out-of-pocket expenses incurred by Merrill
Lynch, including the reasonable fees and disbursements of its legal counsel, and
to indemnify Merrill Lynch and certain related persons against certain
liabilities and expenses, including, without limitation, certain liabilities
under the federal securities laws.
 
     Offeror has retained D.F. King & Co., Inc. as Information Agent and Bankers
Trust Company as Depositary in connection with the Offer. The Information Agent
and the Depositary will receive reasonable
                                       23
<PAGE>   26
 
and customary compensation for their services hereunder and reimbursement for
their reasonable out-of-pocket expenses. The Depositary will also be indemnified
by Offeror against certain liabilities in connection with the Offer.
 
18.  MISCELLANEOUS.
 
     The Offer is not being made to, nor will tenders be accepted from or on
behalf of, holders of Shares residing in any jurisdiction in which the making or
acceptance thereof would not be in compliance with the securities or blue sky
laws of such jurisdiction. In any jurisdiction where the securities or blue sky
laws require the Offer to be made by a licensed broker or dealer, the Offer
shall be deemed to be made on behalf of Offeror by one or more registered
brokers or dealers which are licensed under the laws of such jurisdiction.
 
     No person has been authorized to give any information or make any
representation on behalf of Offeror other than as contained in this Offer to
Purchase or in the Letter of Transmittal, and, if any such information or
representation is given or made, it should not be relied upon as having been
authorized by Offeror.
 
     Offeror has filed with the Commission a statement on Schedule 14D-1,
pursuant to Section 14(d)(1) of the Exchange Act and Rule 14d-1 promulgated
thereunder, furnishing certain information with respect to the Offer. Such
statement and any amendments thereto, including exhibits, may be examined and
copies may be obtained at the same places and in the same manner as set forth
with respect to the Company in Section 8 (except that they will not be available
at the regional offices of the Commission).
 
                                         WDR ACQUISITION CORP.
 
March 2, 1998
 
                                       24
<PAGE>   27
 
                                                                         ANNEX I
 
                        DIRECTORS AND EXECUTIVE OFFICERS
                             OF PARENT AND OFFEROR
 
     The names and ages of the directors and executive officers of Parent and
Offeror, and their present principal occupations, are set forth below. Unless
otherwise indicated, each individual is a citizen of the United Kingdom and his
business address is Saxon House, 2-4 Victoria Street, Windsor, Berkshire SL4
1EN, United Kingdom.
 
                                   SIEBE PLC
 
<TABLE>
<CAPTION>
                                                 PRESENT PRINCIPAL OCCUPATION OR
                                          EMPLOYMENT WITH SIEBE, PLC; MATERIAL POSITIONS
          NAME AND AGE                           HELD DURING THE PAST FIVE YEARS
- --------------------------------  --------------------------------------------------------------
<S>                               <C>
Sir Philip Beck (63)(a)           Chairman since March 1, 1998, and a member of the Board of
                                  Directors for more than the past five years. Formerly Chairman
                                  and Chief Executive Officer of John Mowlem and Company plc
Sir Colin Marshall (64)(b)        Deputy Chairman, and a member of the Board of Directors since
                                  January 1, 1998. Chairman of British Airways plc since 1993;
                                  Deputy Chairman and Chief Executive Officer prior to 1993.
                                  Also Chairman of Inchcape since 1996; Deputy Chairman of
                                  British Telecommunications plc since 1995 and Board Director
                                  of the New York Stock Exchange Inc. since 1994
Allen M. Yurko (46)(c)            Member of the Board of Directors, Managing Director and Chief
                                  Executive Officer since January 1, 1994; Managing Director and
                                  Chief Operating Officer from October 1, 1992 to December 31,
                                  1993
Dr. George W. Sarney (58)(d)      Member of the Board of Directors since January 1994; President
                                  and Chief Operating Officer, Siebe Control Systems, since
                                  September 1993; Director, President and Chief Operating
                                  Officer, Siebe Temperature and Appliance Controls from June to
                                  September 1993; Director, Bowthorpe plc, since 1996; Senior
                                  Vice President, Energy and Environmental Group, Raytheon
                                  Company, prior to 1993
Roger Mann (58)                   Member of the Board of Directors and Group Finance Director
                                  for more than the past five years
Colin P. Bonsey (51)              Member of the Board of Directors and Director of Planning for
                                  more than the past five years
James C. Bays (48)(e)             Vice President, General Counsel and Chief Legal Officer since
                                  March 1996. Vice President, Law and Assistant General Counsel,
                                  GenCorp Inc., from April 1993 to March 1996
R.P.A. Coles (55)                 Director of Legal Affairs and Company Secretary for more than
                                  the past five years
Sir Richard Lloyd, Bt. (69)(f)    Member of the Board of Directors for more than the past five
                                  years
Lord Trefgarne PC (56)(g)         Member of the Board of Directors since 1991; Chairman of the
                                  Engineering Training Authority since 1994; President of the
                                  Mechanical and Metals Trades Confederation since 1990; former
                                  Minister of State
Mr. Peter A. M. Curry (67)(h)     Member of the Board of Directors since June 1997; Executive
                                  Chairman of Unitech plc prior to May 1996
Mr. Timothy K. Thornton           Member of the Board of Directors since 1995; Director of
  (62)(i)                         Kleinwort Benson Securities Limited prior to 1995.
Mr. James Mueller (51)(j)         Member of the Board of Directors since April 1996; President
                                  and Chief Operating Officer of Siebe Temperature and Appliance
                                  Controls since 1993; President of Ranco Inc., an indirect
                                  wholly owned subsidiary of Parent, briefly in early 1993.
</TABLE>
 
                                       I-1
<PAGE>   28
 
                                    OFFEROR
 
<TABLE>
<CAPTION>
                                               PRESENT PRINCIPAL OCCUPATION OR
                                         EMPLOYMENT WITH OFFEROR; MATERIAL POSITIONS
         NAME AND AGE                          HELD DURING THE PAST FIVE YEARS
         ------------                    -------------------------------------------
<S>                              <C>
Allen M. Yurko                   Chairman and Member of the Board of Directors (see notation
                                 above for age and employment history)
Dr. George W. Sarney             Member of the Board of Directors and President (see notation
                                 above for age and employment history)
James C. Bays                    Member of the Board of Directors and Vice President (see
                                 notation above for age and employment history)
Thomas G. Foley (58)(k)          Vice President; Executive Vice President and Chief Financial
                                 Officer, Siebe Control Systems and Executive Vice President
                                 and Chief Financial Officer, The Foxboro Company, since
                                 September 1990
Gregory M. Miller (49)(l)        Vice President and Treasurer; Vice President of
                                 International Finance, Parent, since January 1998; Vice
                                 President, Finance and Administration, Siebe Inc. (a holding
                                 company for Siebe plc's U.S. investments) since September
                                 1990
R.P.A. Coles                     Secretary (See notation above for age and employment
                                 history)
</TABLE>
 
- ---------------
 
(a) Sir Philip Beck's business address is Phylle Manor, Phylle, Shepton Mallet,
    Somerset, BA4 6TD, United Kingdom.
 
(b) Sir Colin Marshall's business address is British Airways, Berkeley Square
    House, Berkeley Square, London, W1X 6BA, United Kingdom.
 
(c) Mr. Yurko is a citizen of the United States.
 
(d) Dr. Sarney is a citizen of the United States and his business address is 33
    Commercial Street, Bristol Park, Foxboro, Massachusetts 02035.
 
(e) Mr. Bays is a citizen of the United States.
 
(f) Sir Richard Lloyd's business address is Sundridge Place, Sundridge,
    Sevenoaks, Kent TN14 6DD, United Kingdom.
 
(g) Lord Trefgarne's business address is The Old Barn, Kettlewell Close, Horsell
    Nr. Woking, Surrey GU 21 4HZ, United Kingdom.
 
(h) Mr. Curry's business address is The Old Vicarage, Valley End, Chobham,
    Surrey, GU24 8TB, United Kingdom.
 
(i) Mr. Thornton's business address is Juthware Hall, Halstock, Nr. Yeovil,
    Somerset, BA22 9SG, United Kingdom.
 
(j) Mr. Mueller is a citizen of the United States and his business address is
    8161 US Route 42N, Plain City, Ohio 43064.
 
(k) Mr. Foley is a citizen of the United States and his business address is 33
    Commercial Street, Foxboro, Massachusetts 02035.
 
(l) Mr. Miller is a citizen of the United States and his business address is 33
    Commercial Street, Foxboro, Massachusetts 02035
 
                                       I-2
<PAGE>   29
 
                                                                        ANNEX II
 
         SUMMARY OF SIGNIFICANT DIFFERENCES BETWEEN UK GAAP AND US GAAP
 
     Below are the major differences between UK GAAP and US GAAP as they relate
to Parent:
 
  Goodwill and Other Intangibles
 
     Under U.K. GAAP, Parent writes off goodwill, being the excess of cost over
the fair value attributable to the net assets acquired, to consolidated equity
in the year of acquisition. Under U.S. GAAP, goodwill is capitalized and
amortized through the statement of income over a period representing the
estimated useful life, not exceeding 40 years. In calculating any gain or loss
resulting from a disposition of assets, goodwill previously written off, subject
to certain adjustments, is restored to original cost under U.K. GAAP.
 
     In accordance with U.K. GAAP, development prototype expenditure and
associated software costs on development of defined commercial projects are
capitalized and amortized through the profit and loss account over a period of
three to ten years. Under U.S. GAAP, such expenditure is generally expensed as
it is incurred.
 
  Deferred Taxation
 
     Under U.K. GAAP, provision is made for deferred taxation under the
liability method unless there is reasonable certainty that such deferred
taxation will not become payable in the foreseeable future. Under U.S. GAAP,
deferred taxation is accounted for on all temporary differences which will
result in taxable or tax deductible amounts in future years subject to a
valuation allowance to reduce the deferred tax asset if it is more likely than
not that the related tax benefit will not be realized.
 
  Dividends
 
     Under U.K. GAAP, dividends are provided for in the year to which they
relate. These dividends are deducted from current year earnings and therefore
reserves. U.S. GAAP recognizes proposed dividends as a reduction of retained
earnings in the accounting period in which they are formally declared.
 
  Pensions
 
     Contributions to the pension funds are assessed in accordance with advice
from actuaries and charged to the income statement so as to spread the pension
cost over the expected service lives of the employees with the pension plan.
Pension accounting under U.S. GAAP is more prescriptive than that under U.K.
GAAP, where a more flexible and judgmental approach is taken. Accordingly, there
may be differences in the actuarial assumptions and methods of valuation of the
plan assets compared with those that would be made under U.S. GAAP.
 
  Acquisition Accounting
 
     Prior to the adoption of Financial Reporting Standard No. 7 -- "Fair Values
in Acquisition Accounting" ("FRS7"), Parent provided for certain costs as part
of the purchase accounting adjustments on an acquisition which under U.S. GAAP
should have been included in the statement of income when those costs were
incurred. Examples of such items include certain costs in respect of salaries of
individuals made redundant, the closure of certain of the Parent's existing
operations and the rectification of inadequate operating systems.
 
     With effect from April 2, 1994, Parent adopted FRS7, FRS7 sets out rules
for accounting for acquisitions in consolidated financial statements. The fair
value balance sheet of the acquired company cannot include provisions for
integration and reorganization costs set up by the acquiring company. In
compliance with FRS7, comparative figures have not been restated. Under U.S.
GAAP, certain integration and reorganization costs, meeting specific criteria,
may be considered liabilities assumed and included in the allocation of the
acquisition cost.
 
  Restructuring and Integration Costs
 
     Under U.K. GAAP, when a decision has been taken to restructure part of
Parent's business, provisions are made for the impairment of asset values
together with severance and other costs. U.S. GAAP requires a number of specific
criteria to be met before such costs can be recognized as an expense. Among
these criteria is the requirement that all significant actions arising from a
restructuring and integration plan and their completion dates must be identified
by the balance sheet date and employees must have been informed of their
 
                                      II-1
<PAGE>   30
 
severance benefits. These criteria also apply to the recognition of integration
costs considered liabilities assumed on acquisition.
 
  Earnings per Ordinary Share
 
     Under U.K. GAAP, earnings per ordinary share is computed using the weighted
average number of ordinary shares in issue during the year. U.S. GAAP also
includes in the computation for earnings per ordinary share the dilutive effect
of all outstanding share options and common share equivalents under the treasury
stock method. Under U.K. GAAP, the weighted average number of ordinary shares
for prior years is restated to reflect the bonus element of rights issued. Under
U.S. GAAP, no restatement is made.
 
  Cash Flows
 
     Under U.K. GAAP, Parent complies with the Revised Financial Reporting
Standard No. 1 -- "Cash flow statements" ("FRS1"). Its objective and principles
are similar to those set out in the Statements of Financial Accounting Standards
No. 95 -- "Statement of Cash Flows" ("SFAS No. 95").
 
     The principal difference between U.K. GAAP and U.S. GAAP is in respect of
classification. Under U.K. GAAP, Parent presents its cash flows for operating
activities, returns on investments and servicing of finance, taxation, capital
expenditures and financial investments, acquisitions and disposals, equity
dividends paid, management of liquid resources, and financing. U.S. GAAP
requires only three categories of cash flow activities which are operating,
investing and financing activities.
 
     Cash flows arising from taxation and returns on investments and servicing
of finance under U.K. GAAP would, with the exception of dividends paid, be
included as operating activities under U.S. GAAP; dividend payments would be
included as a financing activity under U.S. GAAP. In addition, capital
expenditures and financial investment, acquisition and disposals, and management
of liquid resources under U.K. GAAP would be presented as investing activities
under U.S. GAAP.
 
     Furthermore, under U.K. GAAP, cash and cash equivalents include short term
borrowings which under U.S. GAAP would be presented as financing activities.
 
  Investment Securities
 
     Trade investments are carried at cost, reduced for any permanent diminution
in value. Under U.S. GAAP, investments in marketable equity securities and all
debt securities would be classified as "available for sale" securities and
recorded at fair value, with unrealized gains and losses, net of tax, presented
as a component of equity.
 
  Share Option Scheme
 
     Parent does not recognize any compensation for performance-based options
granted to directors and executives. U.S. GAAP requires compensation cost to be
recorded over the service period for the excess of the market value of the
underlying shares over the exercise price of the options.
 
                                      II-2
<PAGE>   31
 
     Facsimile copies of the Letter of Transmittal, properly completed and duly
signed, will be accepted. The Letter of Transmittal, certificates for Shares and
any other required documents should be sent or delivered by each stockholder of
the Company or his broker, dealer, commercial bank, trust company or other
nominee to the Depositary, at one of the addresses set forth below:
 
                               The Depositary is:
 
                             BANKERS TRUST COMPANY
 
<TABLE>
<S>                                <C>                                <C>
             By Mail                            By Hand                  By Overnight Mail or Courier
   BT Services Tennessee, Inc.           Bankers Trust Company           BT Services Tennessee, Inc.
       Reorganization Unit           Corporate Trust & Agency Group     Corporate Trust & Agency Group
         P.O. Box 292737              Receipt and Delivery Window            Reorganization Unit
     Nashville, TN 37229-2737        123 Washington St., 1st Floor         648 Grassmere Park Road
                                           New York, NY 10006                Nashville, TN 37211
                                         Facsimile Copy Number:
                                             (615) 835-3701
                                    (For Eligible Institutions Only)
                                      For Confirmation Telephone:
                                             (615) 835-3572
                                       For Information Telephone:
                                             (800) 735-7777
</TABLE>
 
     Questions and requests for assistance may be directed to the Information
Agent or the Dealer Manager at their respective addresses and telephone numbers
listed below. Additional copies of this Offer to Purchase, the Letter of
Transmittal and other tender offer materials may be obtained from the
Information Agent as set forth below and will be furnished promptly at Offeror's
expense. You may also contact your broker, dealer, commercial bank, trust
company or other nominee for assistance concerning the Offer.
 
                    The Information Agent for the Offer is:
 
                             D.F. KING & CO., INC.
                                77 Water Street
                            New York, New York 10005
                                 (800) 714-3310
 
                      The Dealer Manager for the Offer is:
 
                              MERRILL LYNCH & CO.
 
                             World Financial Center
                                  North Tower
                         New York, New York 10281-1305
                         (212) 449-4954 (Call Collect)

<PAGE>   1
 
                             LETTER OF TRANSMITTAL
 
                        TO TENDER SHARES OF COMMON STOCK
 
                                       OF
 
                             WONDERWARE CORPORATION
 
                       PURSUANT TO THE OFFER TO PURCHASE
                              DATED MARCH 2, 1998
 
                                       BY
 
                             WDR ACQUISITION CORP.
                     AN INDIRECT WHOLLY OWNED SUBSIDIARY OF
 
                                   SIEBE PLC
 
         THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT,
         NEW YORK CITY TIME, ON FRIDAY, APRIL 3, 1998, UNLESS EXTENDED.
 
                        The Depositary for the Offer is:
                             BANKERS TRUST COMPANY
 
<TABLE>
<S>                               <C>                               <C>
             By Mail:                          By Hand:               By Overnight Mail or Courier:
 
   BT Services Tennessee, Inc.          Bankers Trust Company          BT Services Tennessee, Inc.
       Reorganization Unit          Corporate Trust & Agency Group    Corporate Trust & Agency Group
         P.O. Box 292737              Receipt & Delivery Window            Reorganization Unit
     Nashville, TN 37229-2737      123 Washington Street, 1st Floor      648 Grassmere Park Road
                                          New York, NY 10006               Nashville, TN 37211
 
                                        Facsimile Copy Number:
                                            (615) 835-3701
                                   (For Eligible Institutions Only)
 
                                     For Confirmation Telephone:
                                            (615) 835-3572
 
                                      For Information Telephone:
                                            (800) 735-7777
</TABLE>
 
                            ------------------------
 
     DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET
FORTH ABOVE OR TRANSMISSION OF INSTRUCTIONS VIA A FACSIMILE TRANSMISSION TO
A NUMBER OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY. YOU
MUST SIGN THIS LETTER OF TRANSMITTAL IN THE APPROPRIATE SPACE THEREFOR PROVIDED
BELOW AND COMPLETE THE SUBSTITUTE FORM W-9 SET FORTH BELOW.
 
     THE INSTRUCTIONS ACCOMPANYING THIS LETTER OF TRANSMITTAL SHOULD BE READ
CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL IS COMPLETED.
 
     This Letter of Transmittal is to be completed by holders of Shares (as
defined below) of Wonderware Corporation (the "Stockholders") if certificates
evidencing Shares ("Certificates") are to be forwarded herewith or, unless an
Agent's Message (as defined in the Offer to Purchase) is utilized, if delivery
of Shares is to be made by book-entry transfer to an account maintained by the
Depositary at The Depository Trust Company ("DTC") or the Philadelphia
Depository Trust Company ("PDTC") (each a "Book-Entry Transfer Facility")
pursuant to the procedures set forth in Section 3 of the Offer to Purchase.
<PAGE>   2
 
     Stockholders whose Certificates are not immediately available or who cannot
deliver their Certificates for, or a Book-Entry Confirmation (as defined in
Section 2 of the Offer to Purchase) with respect to, their Shares and all other
required documents to the Depositary prior to the Expiration Date (as defined in
Section 1 of the Offer to Purchase) must tender their Shares according to the
guaranteed delivery procedures set forth in Section 3 of the Offer to Purchase.
See Instruction 2 hereof.
- --------------------------------------------------------------------------------
                         DESCRIPTION OF SHARES TENDERED
 
<TABLE>
<S>                                                         <C>                <C>                            <C>
- ------------------------------------------------------------------------------------------------------------------------------
      NAME(S) AND ADDRESS(ES) OF REGISTERED HOLDERS(S)                                 SHARES TENDERED
                 (PLEASE FILL IN, IF BLANK)                                 (ATTACH ADDITIONAL LIST IF NECESSARY)
 ------------------------------------------------------------------------------------------------------------------------------
                                                             SHARE CERTIFICATE        NUMBER OF SHARES         NUMBER OF SHARES
                                                                NUMBER(S)*     REPRESENTED BY CERTIFICATE(S)*     TENDERED**
 ------------------------------------------------------------------------------------------------------------------------------
 
 ------------------------------------------------------------------------------------------------------------------------------
 
 ------------------------------------------------------------------------------------------------------------------------------
 
 ------------------------------------------------------------------------------------------------------------------------------
                                                               TOTAL SHARES
 ------------------------------------------------------------------------------------------------------------------------------
</TABLE>
 
  *  Need not be completed by stockholders tendering by book-entry transfer.
 ** Unless otherwise indicated, it will be assumed that all Shares represented
    by any certificates delivered to the Depositary are being tendered. See
    Instruction 4.
- --------------------------------------------------------------------------------
 
                    NOTE: SIGNATURES MUST BE PROVIDED BELOW.
                     PLEASE READ THE INSTRUCTIONS CAREFULLY
 
[ ] CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER
    MADE TO AN ACCOUNT MAINTAINED BY THE DEPOSITARY WITH A BOOK-ENTRY TRANSFER
    FACILITY, AND COMPLETE THE FOLLOWING (ONLY PARTICIPANTS IN A BOOK-ENTRY
    TRANSFER FACILITY MAY DELIVER SHARES BY BOOK-ENTRY TRANSFER).
 
Name of Tendering Institution:
 
Account No.:  at
 
     [ ] The Depository Trust Company
 
     [ ] Philadelphia Depository Trust Company
 
Transaction Code No.:
 
                                        2
<PAGE>   3
 
[ ] CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED PURSUANT TO A NOTICE OF
    GUARANTEED DELIVERY PREVIOUSLY SENT TO THE DEPOSITARY AND COMPLETE THE
    FOLLOWING:
 
   Name(s) of Tendering Shareholder(s):
 
   Date of Execution of Notice of Guaranteed Delivery:
 
   Window Ticket Number (if any):
 
   Name of Institution which Guaranteed Delivery:
 
   If delivery is by book-entry transfer:
 
   Name of Tendering Institution:
 
   Account No.:
 
        [ ] The Depository Trust Company
 
        [ ] Philadelphia Depository Trust Company
 
   Transaction Code Number:
 
                   ---------------------------------------------
 
Ladies and Gentlemen:
 
     The undersigned hereby tenders to WDR Acquisition Corp., a Delaware
corporation ("Offeror") and an indirect wholly owned subsidiary of Siebe plc, a
public limited company organized under the laws of the United Kingdom
("Parent"), the above-described shares of Common Stock, $0.001 par value per
share, of Wonderware Corporation, a Delaware corporation (the "Company"),
including the associated preferred stock purchase rights issued pursuant to the
Rights Agreement, dated as of February 15, 1996, as amended February 24, 1998,
by and between the Company and The First National Bank of Boston, as Rights
Agent (collectively, the "Shares") for $24.00 per share, net to the seller in
cash, upon the terms and subject to the conditions set forth in the Offer to
Purchase, dated March 2, 1998 (the "Offer to Purchase"), receipt of which is
hereby acknowledged, and in this Letter of Transmittal (which together
constitute the "Offer"). The Offer is being made in connection with the
Agreement and Plan of Merger, dated as of February 24, 1998, among the Parent,
Offeror, WDR Sub Corp., a Delaware corporation and a wholly owned subsidiary of
Offeror, and the Company (the "Merger Agreement"). The undersigned understands
that Offeror reserves the right to transfer or assign, in whole or from time to
time in part, to one or more of its or Parent's affiliates, the right to
purchase all or any portion of the Shares tendered pursuant to the Offer, but
any such transfer or assignment will not relieve Offeror of its obligations
under the Offer or prejudice the rights of tendering holders of the Shares
("Stockholders") to receive payment for Shares validly tendered and accepted for
payment pursuant to the Offer.
 
     Subject to, and effective upon, acceptance for payment of, or payment for,
Shares tendered herewith in accordance with the terms and subject to the
conditions of the Offer (including, if the Offer is extended or amended, the
terms or conditions of any such extension or amendment), the undersigned hereby
sells, assigns and transfers to, or upon the order of, Offeror all right, title
and interest in and to all of the Shares that are being tendered hereby and any
and all other Shares or other securities issued or issuable in respect of such
Shares on or after the date of the Offer (a "Distribution"), and constitutes and
appoints the Depositary the true and lawful agent and attorney-in-fact of the
undersigned with respect to such Shares (and any Distributions), with full power
of substitution (such power of attorney being deemed to be an irrevocable power
coupled with an interest), to (i) deliver Certificates evidencing such Shares
(and any Distributions), or transfer ownership of such Shares (and any
Distributions) on the account books maintained by a Book-Entry Transfer Facility
together, in any such case, with all accompanying evidences of transfer and
authenticity to, or upon the order of, Offeror, upon receipt by the Depositary,
as the undersigned's agent, of the purchase price with respect to such Shares,
(ii) present such Shares (and any Distributions) for transfer on the books of
the Company and (iii) receive all benefits and otherwise exercise all rights of
beneficial ownership of such Shares (and any Distributions), all in accordance
with the terms and subject to the conditions of the Offer.
 
     The undersigned hereby irrevocably appoints each designee of Offeror as the
attorney-in-fact and proxy of the undersigned, each with full power of
substitution, to the full extent of the undersigned's rights with respect to all
Shares tendered hereby and accepted for payment and paid for by Offeror (and any
Distributions), including, without limitation, the right to vote such Shares
(and any Distributions) in such manner as each such attorney and proxy or his
substitute shall, in his sole discretion, deem proper. All such powers of
attorney
 
                                        3
<PAGE>   4
 
and proxies, being deemed to be irrevocable, shall be considered coupled with an
interest in the Shares tendered herewith. Such appointment will be effective
when, and only to the extent that, Offeror accepts such Shares for payment. Upon
such acceptance for payment, all prior powers of attorney and proxies given by
the undersigned with respect to such Shares (and any Distributions) will be
revoked, without further action, and no subsequent powers of attorney and
proxies may be given (and, if given, will be deemed ineffective). The designees
of Offeror will, with respect to the Shares (and any Distributions) for which
such appointment is effective, be empowered to exercise all voting and other
rights of the undersigned with respect to such Shares (and any Distributions) as
they in their sole discretion may deem proper. Offeror reserves the absolute
right to require that, in order for Shares to be deemed validly tendered,
immediately upon the acceptance for payment of such Shares, Offeror or its
designees are able to exercise full voting rights with respect to such Shares
(and any Distributions).
 
     All authority conferred or agreed to be conferred in this Letter of
Transmittal shall be binding upon the successors, assigns, heirs, executors,
administrators and legal representatives of the undersigned and shall not be
affected by, and shall survive, the death or incapacity of the undersigned.
Except as stated in the Offer to Purchase, this tender is irrevocable.
 
     The undersigned hereby represents and warrants that the undersigned has
full power and authority to tender, sell, assign and transfer the Shares
tendered hereby (and any Distributions) and that, when the same are accepted for
payment and paid for by Offeror, Offeror will acquire good, marketable and
unencumbered title thereto, free and clear of all liens, restrictions, charges
and encumbrances including irrevocable proxies, and that the Shares tendered
hereby (and any Distributions) will not be subject to any adverse claim. The
undersigned, upon request, will execute and deliver any additional documents
deemed by the Depositary or Offeror to be necessary or desirable to complete the
sale, assignment and transfer of Shares tendered hereby (and any Distributions).
In addition, the undersigned shall promptly remit and transfer to the
Depositary, for the account of Offeror, all Distributions issued to the
undersigned on or after February 24, 1998, in respect of the Shares tendered
hereby, accompanied by appropriate documentation of transfer; and pending such
remittance and transfer or appropriate assurance thereof, Offeror shall be
entitled to all rights and privileges as owner of any such Distributions and may
withhold the entire purchase price or deduct from the purchase price the amount
of value thereof, as determined by Offeror in its sole discretion.
 
     The undersigned understands that Offeror's acceptance for payment of any
Shares tendered hereby will constitute a binding agreement between the
undersigned and Offeror with respect to such Shares upon the terms and subject
to the conditions of the Offer.
 
     The undersigned recognizes that, under certain circumstances set forth in
the Offer to Purchase, Offeror may not be required to accept for payment any of
the Shares tendered hereby or may accept for payment fewer than all of the
Shares tendered hereby.
 
     Unless otherwise indicated herein under "Special Payment Instructions,"
please issue the check for the purchase price and/or return any Certificates
evidencing Shares not tendered or not accepted for payment in the name(s) of the
registered holder(s) appearing under "Description of Shares Tendered."
Similarly, unless otherwise indicated under "Special Delivery Instructions,"
please mail the check for the purchase price and/or return any Certificates
evidencing Shares not tendered or not accepted for payment (and accompanying
documents, as appropriate) to the address(es) of the registered holder(s)
appearing under "Description of Shares Tendered." In the event that both the
"Special Payment Instructions" and the "Special Delivery Instructions" are
completed, please issue the check and/or return any such Certificates evidencing
Shares not tendered or not accepted for payment in the name(s) of, and deliver
such check and/or return such Certificates to, the person(s) so indicated.
Unless otherwise indicated herein under "Special Payment Instructions," in the
case of a book-entry delivery of Shares, please credit the account maintained at
the Book-Entry Transfer Facility indicated above with respect to any Shares not
accepted for payment. The undersigned recognizes that Offeror has no obligation
pursuant to the "Special Payment Instructions" to transfer any Shares from the
name of the registered holder thereof if Offeror does not accept for payment any
of the Shares tendered hereby.
 
                                        4
<PAGE>   5
 
                          SPECIAL PAYMENT INSTRUCTIONS
                      (SEE INSTRUCTIONS 1, 4, 5, 6 AND 7)
 
      To be completed ONLY if Certificates not tendered or not accepted for
 payment and/or the check for the purchase price of Shares accepted for payment
 are to be issued in the name of someone other than the undersigned, or if
 Shares delivered by book-entry transfer that are not accepted for payment are
 to be returned by credit to an account maintained at a Book-Entry Transfer
 Facility, other than to the account indicated above.
 
 Issue:  [ ] Check  [ ] Certificate(s) to:
 
 Name
      ------------------------------------------------------------------------
                                 (PLEASE PRINT)
 Address
        -----------------------------------------------------------------------

- -------------------------------------------------------------------------------

- -------------------------------------------------------------------------------
                                                                     (ZIP CODE)
 
- --------------------------------------------------------------------------------
                (TAXPAYER IDENTIFICATION OR SOCIAL SECURITY NO.)
 
                           (SEE SUBSTITUTE FORM W-9)
 
 [ ] Credit Shares by book-entry transfer and not purchased to the account set
     forth below
 
 Check appropriate Box:
 [ ] The Depository Trust Company
 [ ] Philadelphia Depository Trust Company
 
 Acct No.:
          ----------------------------------------------------------------------
 

                         SPECIAL DELIVERY INSTRUCTIONS
                      (SEE INSTRUCTIONS 1, 4, 5, 6 AND 7)
 
      To be completed ONLY if Certificates not tendered or not accepted for
 payment and/or the check for the purchase price of Shares accepted for payment
 are to be sent to someone other than the undersigned or to the undersigned at
 an address other than that shown above.
 
 Mail check and/or certificates to:
 
 Name
      --------------------------------------------------------------------------
                                 (PLEASE PRINT)
 Address
         -----------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                                                                    (ZIP CODE)
 
- --------------------------------------------------------------------------------
                (TAXPAYER IDENTIFICATION OR SOCIAL SECURITY NO.)
 
                           (SEE SUBSTITUTE FORM W-9)
<PAGE>   6
 
                                  INSTRUCTIONS
 
             FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER
 
     1. Guarantee of Signatures.  Except as otherwise provided below, signatures
on this Letter of Transmittal need not be guaranteed by a member firm of a
registered national securities exchange (registered under Section 6 of the
Securities Exchange Act of 1934, as amended (the "Exchange Act")) or by a member
firm of the National Association of Securities Dealers, Inc., by a commercial
bank or trust company having an office or correspondent in the United States or
by any other "Eligible Guarantor Institution" (bank, stockholder, savings and
loan association or credit union with membership approved signature guarantee
medallion program) as defined in Rule 17Ad-15 under the Exchange Act (each of
the foregoing constituting an "Eligible Institution"), unless the Shares
tendered hereby are tendered (i) by the registered holder (which term, for
purposes of this document, shall include any participant in a Book-Entry
Transfer Facility whose name appears on a security position listing as the owner
of Shares) of such Shares who has completed either the box entitled "Special
Payment Instructions" or the box entitled "Special Delivery Instructions" herein
or (ii) as noted in the following sentence. If the Certificates are registered
in the name of a person other than the signer of this Letter of Transmittal, or
if payment is to be made to, or Certificates evidencing unpurchased Shares are
to be issued or returned to, a person other than the registered owner, then the
tendered Certificates must be endorsed or accompanied by duly executed stock
powers, in either case signed exactly as the name(s) of the registered owner(s)
appear(s) on the Certificates, with the signatures on the Certificates or stock
powers guaranteed by an Eligible Institution as provided herein. See Instruction
5.
 
     2. Requirements of Tender.  This Letter of Transmittal is to be completed
by Stockholders if Certificates evidencing Shares are to be forwarded herewith
or, unless an Agent's Message (as defined in the Offer to Purchase) is utilized,
if delivery of Shares is to be made pursuant to the procedures for book-entry
transfer set forth in Section 3 of the Offer to Purchase. For a Stockholder to
validly tender Shares pursuant to the Offer, either (a) a properly completed and
duly executed Letter of Transmittal (or a manually signed facsimile thereof),
with any required signature guarantees and any other required documents, or an
Agent's Message in the case of a book-entry delivery, must be received by the
Depositary at one of its addresses set forth herein prior to the Expiration Date
and either (i) Certificates for tendered Shares must be received by the
Depositary at one of such addresses prior to the Expiration Date or (ii) Shares
must be delivered pursuant to the procedures for book-entry transfer set forth
in Section 3 of the Offer to Purchase and a Book-Entry Confirmation must be
received by the Depositary prior to the Expiration Date or (b) the tendering
Stockholder must comply with the guaranteed delivery procedures set forth below
and in Section 3 of the Offer to Purchase.
 
     Stockholders whose Certificates are not immediately available or who cannot
deliver their Certificates and all other required documents to the Depositary or
complete the procedures for book-entry transfer prior to the Expiration Date may
tender their Shares by properly completing and duly executing a Notice of
Guaranteed Delivery pursuant to the guaranteed delivery procedures set forth in
Section 3 of the Offer to Purchase. Pursuant to such procedure: (i) such tender
must be made by or through an Eligible Institution, (ii) a properly completed
and duly executed Notice of Guaranteed Delivery, substantially in the form made
available by Offeror, must be received by the Depositary prior to the Expiration
Date, and (iii) the Certificates representing all tendered Shares in proper form
for transfer, or a Book-Entry Confirmation with respect to all tendered Shares,
together with a Letter of Transmittal (or a manually signed facsimile thereof),
properly completed and duly executed, with any required signature guarantees and
any other documents required by this Letter of Transmittal, must be received by
the Depositary within five NASDAQ/National Market System trading days after the
date of such Notice of Guaranteed Delivery. If Certificates are forwarded
separately to the Depositary, a properly completed and duly executed Letter of
Transmittal (or a manually signed facsimile thereof) must accompany each such
delivery.
 
     THE METHOD OF DELIVERY OF CERTIFICATES, THIS LETTER OF TRANSMITTAL AND ANY
OTHER REQUIRED DOCUMENTS, IS AT THE OPTION AND SOLE RISK OF THE TENDERING
STOCKHOLDER AND, EXCEPT AS OTHERWISE PROVIDED IN THIS INSTRUCTION 2, THE
DELIVERY WILL BE DEEMED MADE ONLY WHEN ACTUALLY RECEIVED BY THE DEPOSITARY. IF
DELIVERY IS BY
<PAGE>   7
 
MAIL, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY INSURED, IS
RECOMMENDED. IN ALL CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO ENSURE TIMELY
DELIVERY.
 
     No alternative, conditional or contingent tenders will be accepted. All
tendering Stockholders, by execution of this Letter of Transmittal (or a
facsimile thereof), waive any right to receive any notice of the acceptance of
their Shares for payment.
 
     3. Inadequate Space.  If the space provided herein is inadequate, the
information required under "Description of Shares Tendered" should be listed on
a separate signed schedule attached hereto.
 
     4. Partial Tenders.  If less than all of the Shares represented by any
Certificates delivered to the Depositary herewith is to be tendered hereby, fill
in the number of Shares which are to be tendered in the box entitled "Number of
Shares Tendered." In such case, a new Certificate for the remainder of the
Shares that were evidenced by the old Certificate(s) will be sent, without
expense, to the person(s) signing this Letter of Transmittal, unless otherwise
provided in the box entitled "Special Payment Instructions" or the box entitled
"Special Delivery Instructions" on this Letter of Transmittal, as soon as
practicable after the Expiration Date. All Shares represented by Certificate(s)
delivered to the Depositary will be deemed to have been tendered unless
otherwise indicated.
 
     5. Signatures on Letter of Transmittal, Instruments of Transfer and
Endorsements.  If this Letter of Transmittal is signed by the registered
holder(s) of the Shares tendered hereby, the signature(s) must correspond
exactly with the name(s) as written on the face of the Certificate(s) without
alteration, enlargement or any change whatsoever.
 
     If any of the Shares tendered hereby are owned of record by two or more
joint owners, all such owners must sign this Letter of Transmittal.
 
     If any of the tendered Shares are registered in different names on several
Certificates, it will be necessary to complete, sign and submit as many separate
Letters of Transmittal as there are different registrations of Certificates. To
obtain additional Letters of Transmittal, you may either make a photocopy of
this Letter of Transmittal or call D.F. King & Co., Inc., the Information Agent,
at (800) 714-3310.
 
     If this Letter of Transmittal or any Certificates or instruments of
transfer are signed by a trustee, executor, administrator, guardian,
attorney-in-fact, officer of a corporation or other person acting in a fiduciary
or representative capacity, such person should so indicate when signing, and
proper evidence satisfactory to Offeror of such person's authority to so act
must be submitted.
 
     If this Letter of Transmittal is signed by the registered holder(s) of the
Shares listed and transmitted hereby, no endorsements of Certificates or
separate instruments of transfer are required unless payment is to be made, or
Certificates not tendered or not purchased are to be issued or returned, to a
person other than the registered holder(s).
 
     If this Letter of Transmittal is signed by a person other than the
registered holder(s) of the Shares evidenced by the Certificate(s) listed and
transmitted hereby, the Certificate(s) must be endorsed or accompanied by
appropriate instruments of transfer, in either case signed exactly as the
name(s) of the registered holder(s) appear(s) on the Certificate(s).
Signature(s) on such Certificate(s) and such endorsements or instruments of
transfer must be guaranteed by an Eligible Institution.
 
     6. Transfer Taxes.  Except as set forth in this Instruction 6, Offeror will
pay or cause to be paid any transfer taxes with respect to the transfer and sale
of purchased Shares to it or its order pursuant to the Offer. If, however,
payment of the purchase price is to be made to, or (in the circumstances
permitted hereby) if Certificates for Shares not tendered or not purchased are
to be registered in the name of, any person other than the registered holder(s),
or if tendered Certificates are registered in the name of any person other than
the person(s) signing this Letter of Transmittal, the amount of any transfer
taxes (whether imposed on the registered holder(s) or such person) payable on
account of the transfer to such person will be deducted from the purchase price
unless satisfactory evidence of the payment of such taxes or exemption therefrom
is submitted herewith.
<PAGE>   8
 
     EXCEPT AS PROVIDED IN THIS INSTRUCTION 6, IT WILL NOT BE NECESSARY FOR
TRANSFER TAX STAMPS TO BE AFFIXED TO THE CERTIFICATE(S) LISTED IN THIS LETTER OF
TRANSMITTAL.
 
     7. Special Payment and Delivery Instructions.  If a check and/or
Certificates for unpurchased Shares are to be issued in the name of a person
other than the signer of this Letter of Transmittal or if a check is to be sent
and/or such Certificates are to be returned to someone other than the signer of
this Letter of Transmittal or to an address other than that shown above, the
appropriate boxes on this Letter of Transmittal should be completed. If any
tendered Shares are not purchased for any reason and such Shares are delivered
by book-entry transfer to a Book-Entry Transfer Facility, such Shares will be
credited to an account maintained at the appropriate Book-Entry Transfer
Facility.
 
     8. Requests for Assistance or Additional Copies.  Questions and requests
for assistance may be directed to the Information Agent or the Dealer Manager at
their respective addresses or telephone numbers set forth below and requests for
additional copies of the Offer to Purchase, this Letter of Transmittal and the
Notice of Guaranteed Delivery may be directed to the Information Agent or
brokers, dealers, commercial banks and trust companies and such materials will
be furnished at Offeror's expense.
 
     9. Waiver of Conditions.  The conditions of the Offer may be waived by
Offeror, in whole or in part, at any time or from time to time, at Offeror's
sole discretion, subject to the terms of the Offer and the Merger Agreement.
 
     10. Backup Withholding Tax.  Each tendering Stockholder is required to
provide the Depositary with a correct Taxpayer Identification Number ("TIN") on
Substitute Form W-9, which is provided under "Important Tax Information" below.
FAILURE TO PROVIDE THE INFORMATION ON THE SUBSTITUTE FORM W-9 MAY SUBJECT THE
TENDERING STOCKHOLDER TO 31% FEDERAL INCOME TAX BACKUP WITHHOLDING ON THE
PAYMENT OF THE PURCHASE PRICE FOR THE SHARES. The tendering Stockholder should
indicate in the box in Part III of the Substitute Form W-9 if the tendering
Stockholder has not been issued a TIN and has applied for or intends to apply
for a TIN in the near future, in which case the tendering Stockholder should
complete the Certificate of Awaiting Taxpayer Identification Number provided
below. If the Stockholder has indicated in the box in Part III that a TIN has
been applied for and the Depositary is not provided a TIN within 60 days, the
Depositary will withhold 31% of all payments of the purchase price, if any, made
thereafter pursuant to the Offer until a TIN is provided to the Depositary.
 
     11. Lost or Destroyed Certificates.  If any Certificate(s) representing
Shares has been lost or destroyed, the holders should promptly notify the
Depositary. The holders will then be instructed as to the procedure to be
followed in order to replace the Certificate(s). This Letter of Transmittal and
related documents cannot be processed until the procedures for replacing lost or
destroyed Certificate(s) have been followed.
 
     IMPORTANT: THIS LETTER OF TRANSMITTAL (TOGETHER WITH CERTIFICATES OR A
BOOK-ENTRY CONFIRMATION FOR SHARES AND ANY OTHER REQUIRED DOCUMENTS) MUST BE
RECEIVED BY THE DEPOSITARY, OR A NOTICE OF GUARANTEED DELIVERY MUST BE RECEIVED
BY THE DEPOSITARY, PRIOR TO THE EXPIRATION DATE.
 
                           IMPORTANT TAX INFORMATION
 
     Under federal income tax law, a Stockholder whose tendered Shares are
accepted for payment is required to provide the Depositary (as payer) with such
Stockholder's correct TIN on Substitute Form W-9 below. If such Stockholder is
an individual, the TIN is his social security number. If the tendering
Stockholder has not been issued a TIN and has applied for a number or intends to
apply for a number in the near future, such Stockholder should so indicate on
the Substitute Form W-9 and should complete the Certificate of Awaiting Taxpayer
Identification Number provided below. See Instruction 10. If the Depositary is
not provided with the correct TIN, the Stockholder may be subject to a $50
penalty imposed by the Internal Revenue Service. In addition, payments that are
made to such Stockholders with respect to Shares purchased pursuant to the Offer
may be subject to federal income tax backup withholding.
<PAGE>   9
 
     Certain Stockholders (including among others, all corporations and certain
foreign individuals) are not subject to these backup withholding and reporting
requirements. In order for a foreign individual to qualify as an exempt
recipient, that Stockholder must submit a statement, signed under penalties of
perjury, attesting to that individual's exempt status. Forms for such statements
can be obtained from the Depositary. See the enclosed Guidelines for
Certification of Taxpayer Identification Number on Substitute Form W-9 for
additional instructions.
 
     If backup withholding applies, the Depositary is required to withhold 31%
of any payments made to the Stockholder. Backup withholding is not an additional
tax. Rather, the tax liability of persons subject to backup withholding will be
reduced by the amount of tax withheld. If withholding results in an overpayment
of taxes, a refund may be obtained from the Internal Revenue Service.
 
PURPOSE OF SUBSTITUTE FORM W-9
 
     To prevent federal income tax backup withholding with respect to payment of
the purchase price for Shares purchased pursuant to the Offer, a Stockholder
must provide the Depositary with his correct TIN by completing the Substitute
Form W-9 below, certifying that the TIN provided on Substitute Form W-9 is
correct (or that such Stockholder is awaiting a TIN) and that (1) such
Stockholder has not been notified by the Internal Revenue Service that he is
subject to backup withholding as a result of failure to report all interest or
dividends or (2) the Internal Revenue Service has notified the Stockholder that
he is no longer subject to backup withholding.
 
WHAT NUMBER TO GIVE THE DEPOSITARY
 
     The Stockholder is required to give the Depositary the social security
number or employer identification number of the record holder of the Shares
tendered hereby. If the Shares are in more than one name or are not in the name
of the actual owner, consult the enclosed Guidelines for Certification of
Taxpayer Identification Number on Substitute Form W-9 for additional guidance on
which number to report.
<PAGE>   10
 
                                   SIGN HERE
                      (COMPLETE SUBSTITUTE FORM W-9 BELOW)
 
   --------------------------------------------------------------------------
 
   --------------------------------------------------------------------------
                            SIGNATURE(S) OF OWNER(S)
 
                                                                      Name(s)
   --------------------------------------------------------------------------
 
   --------------------------------------------------------------------------
                                 (PLEASE PRINT)
 
   Capacity (Full Title)
   --------------------------------------------------------------------------
 
                                                                      Address
   --------------------------------------------------------------------------
 
   --------------------------------------------------------------------------
 
   --------------------------------------------------------------------------
                               (INCLUDE ZIP CODE)
 
   --------------------------------------------------------------------------
 
   Area Code and Telephone Number
   --------------------------------------------------------------------------
 
   Taxpayer Identification or Social Security Number
   ----------------------------------------------------------------------
                                                 (SEE SUBSTITUTE FORM W-9)
 
   Dated:
   --------------------------------- , 1998
 
   (Must be signed by registered holder(s) exactly as name(s) appear(s) on
   stock certificate(s) or on a security position listing or by the person(s)
   authorized to become registered holder(s) by certificates and documents
   transmitted herewith. If signature is by a trustee, executor,
   administrator, guardian, attorney-in-fact, agent, officer of a corporation
   or other person acting in a fiduciary or representative capacity, please
   set forth full title and see Instruction 5).
 
                           GUARANTEE OF SIGNATURE(S)
                           (SEE INSTRUCTIONS 1 AND 5)
 
                    FOR USE BY FINANCIAL INSTITUTIONS ONLY.
 
   Authorized Signature(s)
   --------------------------------------------------------------------------
 
                                                                         Name
   --------------------------------------------------------------------------
 
   --------------------------------------------------------------------------
                                 (PLEASE PRINT)
 
   Name of Firm
   --------------------------------------------------------------------------
                               (INCLUDE ZIP CODE)
 
   Area Code and Telephone Number
   --------------------------------------------------------------------------
 
   Dated:
   --------------------------------- , 1998
<PAGE>   11
 
<TABLE>
<C>                 <S>                                         <C>
- --------------------------------------------------------------------------------------------------------
                                  PAYOR'S NAME: BANKERS TRUST COMPANY
- --------------------------------------------------------------------------------------------------------
     SUBSTITUTE      PART I -- PLEASE PROVIDE YOUR TIN IN THE    PART III -
      FORM W-9       BOX AT THE RIGHT AND CERTIFY BY SIGNING AND  TIN: _________________________________
                     DATING BELOW.                               Social Security Number
                                                                 or Employer Identification Number
                    ------------------------------------------------------------------------------------
 DEPARTMENT OF THE   PART II -- For Payees exempt from backup withholding, see the enclosed Guidelines
     TREASURY,       for Certification of Taxpayer Identification Number on Substitute Form W-9 and
  INTERNAL REVENUE   complete as instructed therein.
      SERVICE
                    ------------------------------------------------------------------------------------
  PAYOR'S REQUEST    Certification -- Under penalties of perjury, I certify that:
    FOR TAXPAYER     (1) The number shown on this form is my correct TIN (or I am waiting for a number
   IDENTIFICATION    to be issued to me); and
   NUMBER ("TIN")    (2) I am not subject to backup withholding because (a) I am exempt from backup
 AND CERTIFICATION       withholding or (b) I have not been notified by the Internal Revenue Service
                         ("IRS") that I am subject to backup withholding as a result of a failure to
                         report all interest or dividends, or (c) the IRS has notified me that I am no
                         longer subject to backup withholding.
 
                    ------------------------------------------------------------------------------------
                    Signature: __________________________________________________  Date:  ______________
- --------------------------------------------------------------------------------------------------------
</TABLE>
 
     CERTIFICATION INSTRUCTIONS -- You must cross out item (2) above if you have
been notified by the IRS that you are subject to backup withholding because of
underreporting interest or dividends on your tax return. However, if after being
notified by the IRS that you were subject to backup withholding, you received
another notification from the IRS that you were no longer subject to backup
withholding, do not cross out item (2). (Also see the instructions in the
enclosed Guidelines.)
 
NOTE: FAILURE TO COMPLETE AND RETURN THIS SUBSTITUTE FORM W-9 MAY RESULT IN
      BACKUP WITHHOLDING OF 31% OF ANY PAYMENTS MADE TO YOU PURSUANT TO THE
      OFFER. PLEASE REVIEW THE ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER
      IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL DETAILS.
 
      YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU ARE AWAITING YOUR TIN.
 
- --------------------------------------------------------------------------------
 
             CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER
 
      I certify under penalties of perjury that a TIN has not been issued to
 me, and either (1) I have mailed or delivered an application to receive a TIN
 to the appropriate IRS Center or Social Security Administration Officer or
 (2), I intend to mail or deliver an application in the near future. I
 understand that if I do not provide a TIN by the time of payment, 31% of all
 payments pursuant to the Offer made to me thereafter will be withheld until I
 provide a number.
 
 Signature: ____________________________________________  Date:  ______________
 
<PAGE>   12
 
                    The Information Agent for the Offer is:
 
                             D.F. KING & CO., INC.
                                77 Water Street
                               New York, NY 10005
                                 Call Toll Free
                                 (800) 714-3310
 
                      The Dealer Manager for the Offer is:
 
                              MERRILL LYNCH & CO.
                             World Financial Center
                                  North Tower
                            New York, NY 10281-1305
                         (212) 449-4954 (Call Collect)

<PAGE>   1
 
(LOGO)                                                World Financial Center
                                                      North Tower
                                                      New York, New York
                                                      10281-1305
                                                      (212) 449-4954 (Call
                                                      Collect)
 
                           OFFER TO PURCHASE FOR CASH
 
                     ALL OUTSTANDING SHARES OF COMMON STOCK
                                       OF
                             WONDERWARE CORPORATION
                                       AT
                              $24.00 NET PER SHARE
                                       BY
 
                             WDR ACQUISITION CORP.
                     AN INDIRECT WHOLLY OWNED SUBSIDIARY OF
 
                                   SIEBE PLC
 
    THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK
             CITY TIME, ON FRIDAY, APRIL 3, 1998, UNLESS EXTENDED.
 
                                                                   March 2, 1998
 
To Brokers, Dealers, Commercial Banks,
  Trust Companies and Other Nominees:
 
     We have been appointed by WDR Acquisition Corp., a Delaware corporation
(the "Offeror") and an indirect wholly owned subsidiary of Siebe plc, a public
limited company organized under the laws of the United Kingdom ("Parent"), to
act as Dealer Manager in connection with Offeror's offer to purchase all
outstanding shares of Common Stock, $0.001 par value per share, of Wonderware
Corporation (the "Company"), including the associated preferred stock purchase
rights issued pursuant to the Rights Agreement, dated as of February 15, 1996,
as amended on February 24, 1998, by and between the Company and The First
National Bank of Boston, as Rights Agent (collectively, the "Shares"), at a
purchase price of $24.00 per Share, net to the seller in cash, without interest
thereon, upon the terms and subject to the conditions set forth in the Offer to
Purchase, dated March 2, 1998 (the "Offer to Purchase"), and in the related
Letter of Transmittal (which together with any amendments or supplements
thereto, collectively constitute the "Offer") enclosed herewith. The Offer is
being made in connection with the Agreement and Plan of Merger, dated as of
February 24, 1998, among Parent, Offeror, WDR Sub Corp., a Delaware corporation
and a wholly owned subsidiary of Offeror, and the Company (the "Merger
Agreement"). Holders of Shares whose certificates for such Shares are not
immediately available or who cannot deliver their certificates and all other
required documents to Bankers Trust Company (the "Depositary") or complete the
procedures for book-entry transfer prior to the Expiration Date (as defined in
Section 1 of the Offer to Purchase) must tender their Shares according to the
guaranteed delivery procedures set forth in Section 3 of the Offer to Purchase.
 
     THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, THERE BEING VALIDLY
TENDERED AND NOT PROPERLY WITHDRAWN PRIOR TO THE EXPIRATION OF THE OFFER THAT
NUMBER OF SHARES OF COMMON STOCK, $.001 PAR VALUE PER SHARE, OF THE COMPANY,
INCLUDING THE ASSOCIATED PREFERRED STOCK PURCHASE RIGHTS, WHICH WOULD REPRESENT,
ON A FULLY DILUTED BASIS, AT LEAST A MAJORITY OF THE OUTSTANDING SHARES. THE
OFFER IS ALSO SUBJECT TO CERTAIN OTHER CONDITIONS CONTAINED IN THIS OFFER TO
PURCHASE. SEE SECTIONS 1 AND 15 OF THE OFFER TO PURCHASE.
 
     Please furnish copies of the enclosed materials to those of your clients
for whose accounts you hold Shares registered in your name or in the name of
your nominee.
<PAGE>   2
 
     For your information and for forwarding to your clients for whom you hold
Shares registered in your name or in the name of your nominee, or who hold
Shares registered in their own names, we are enclosing the following documents:
 
          1. The Offer to Purchase, dated March 2, 1998.
 
          2. The Letter of Transmittal to be used by holders of Shares in
     accepting the Offer and tendering Shares. Facsimile copies of the Letter of
     Transmittal (with manual signatures) may be used to tender Shares.
 
          3. A letter to stockholders of the Company from Roy H. Slavin, the
     Chairman of the Board, President and Chief Executive Officer of the
     Company, together with a Solicitation/Recommendation Statement on Schedule
     14D-9 filed with the Securities and Exchange Commission by the Company and
     mailed to the stockholders of the Company.
 
          4. The Notice of Guaranteed Delivery for Shares to be used to accept
     the Offer if neither of the two procedures for tendering Shares set forth
     in the Offer to Purchase can be completed on a timely basis.
 
          5. A printed form of letter which may be sent to your clients for
     whose accounts you hold Shares registered in your name or in the name of
     your nominee, with space provided for obtaining such clients' instructions
     with regard to the Offer.
 
          6. Guidelines of the Internal Revenue Service for Certification of
     Taxpayer Identification Number on Substitute Form W-9.
 
          7. A return envelope addressed to the Depositary.
 
     Upon the terms and subject to the conditions of the Offer (including, if
the Offer is extended or amended, the terms and conditions of any such extension
or amendment), Offeror will accept for payment and will pay for all Shares
validly tendered prior to the Expiration Date and not theretofore withdrawn in
accordance with Section 4 of the Offer to Purchase promptly after the later to
occur of (a) the Expiration Date and (b) the satisfaction or waiver of the
conditions set forth in Section 15 of the Offer to Purchase related to
regulatory matters. Subject to compliance with Rule 14e-1(c) under the Exchange
Act, Offeror expressly reserves the right to delay payment for Shares in order
to comply in whole or in part with any applicable law. See Sections 1 and 16 of
the Offer to Purchase. In all cases, payment for Shares tendered and accepted
for payment pursuant to the Offer will be made only after timely receipt by the
Depositary of (i) certificates for such Shares or timely confirmation of a
book-entry transfer of such Shares into the Depositary's account at The
Depository Trust Company or the Philadelphia Depository Trust Company, pursuant
to the procedures set forth in Section 3 of the Offer to Purchase, (ii) a
properly completed and duly executed Letter of Transmittal (or a manually signed
facsimile thereof) with all required signature guarantees or, in the case of a
book-entry transfer, an Agent's Message (as defined in Section 2 of the Offer to
Purchase) and (iiii) any other documents required by the Letter of Transmittal.
 
     Neither Offeror nor Parent will pay any fees or commissions to any broker,
dealer or any other person (other than the Dealer Manager, the Information Agent
and the Depositary as described in Section 17 of the Offer to Purchase) in
connection with the solicitation of tenders of Shares pursuant to the Offer. The
Offeror will, however, upon request, reimburse you for customary mailing and
handling expenses incurred by you in forwarding any of the enclosed materials to
your clients.
 
     Offeror will pay or cause to be paid any stock transfer taxes incident to
the transfer to it of validly tendered Shares, except as otherwise provided in
Instruction 6 of the Letter of Transmittal.
 
     YOUR PROMPT ACTION IS REQUESTED. WE URGE YOU TO CONTACT YOUR CLIENTS AS
PROMPTLY AS POSSIBLE. PLEASE NOTE THAT THE OFFER AND WITHDRAWAL RIGHTS WILL
EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY TIME, ON FRIDAY, APRIL 3, 1998, UNLESS
THE OFFER IS EXTENDED.
 
     In order to take advantage of the Offer, (i) a duly executed and properly
completed Letter of Transmittal (or a manually signed facsimile thereof) with
any required signature guarantees, or, in the case of a book-entry transfer, an
Agent's Message or other required documents should be sent to the Depositary and
(ii) certificates representing the tendered Shares or a timely Book-Entry
Confirmation (as defined in Section 2 of the Offer to Purchase) should be
delivered to the Depositary in accordance with the instructions set forth in the
Offer.
 
     If holders of Shares wish to tender, but it is impracticable for them to
forward their certificates or other required documents or complete the
procedures for book-entry transfer prior to the Expiration Date, a tender
 
                                        2
<PAGE>   3
 
must be effected by following the guaranteed delivery procedures specified in
Section 3 of the Offer to Purchase.
 
     Any inquiries you may have with respect to the Offer should be addressed to
D.F. King & Co., Inc., the Information Agent for the Offer, at 77 Water Street,
New York, New York 10005, 1-800-714-3310 or Merrill Lynch, Pierce, Fenner &
Smith Incorporated, the Dealer Manager, at World Financial Center, North Tower,
New York, New York 10281-1305, 212-449-4954 (call collect).
 
     Additional copies of the enclosed materials may be obtained by calling D.F.
King & Co., Inc., the Information Agent at 1-800-714-3310 or from brokers,
dealers, commercial banks or trust companies.
 
                                      Very truly yours,
 
                                      MERRILL LYNCH, PIERCE, FENNER &
                                        SMITH INCORPORATED
 
     NOTHING CONTAINED HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL CONSTITUTE YOU
OR ANY OTHER PERSON AS AN AGENT OF PARENT, OFFEROR, THE COMPANY, THE DEPOSITARY,
THE INFORMATION AGENT, THE DEALER MANAGER OR ANY AFFILIATE OF ANY OF THE
FOREGOING, OR AUTHORIZE YOU OR ANY OTHER PERSON TO MAKE ANY STATEMENT OR USE ANY
DOCUMENT ON BEHALF OF ANY OF THEM IN CONNECTION WITH THE OFFER OTHER THAN THE
ENCLOSED DOCUMENTS AND THE STATEMENTS CONTAINED THEREIN.
 
                                        3

<PAGE>   1
 
                           OFFER TO PURCHASE FOR CASH
 
                     ALL OUTSTANDING SHARES OF COMMON STOCK
                                       OF
                             WONDERWARE CORPORATION
                                       AT
                              $24.00 NET PER SHARE
                                       BY
 
                             WDR ACQUISITION CORP.
                     AN INDIRECT WHOLLY OWNED SUBSIDIARY OF
 
                                   SIEBE PLC
 
         THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT,
         NEW YORK CITY TIME, ON FRIDAY, APRIL 3, 1998, UNLESS EXTENDED.
 
                                                                   March 2, 1998
 
To Our Clients:
 
     Enclosed for your consideration are the Offer to Purchase, dated March 2,
1998 (the "Offer to Purchase"), and the related Letter of Transmittal (which
together constitute the "Offer") relating to the offer by WDR Acquisition Corp.,
a Delaware corporation (the "Offeror") and an indirect wholly owned subsidiary
of Siebe plc, a public limited company organized under the laws of the United
Kingdom ("Parent"), to purchase all of the outstanding shares of Common Stock,
$0.001 par value per share, of Wonderware Corporation, a Delaware corporation
(the "Company"), including the associated preferred stock purchase rights issued
pursuant to the Rights Agreement, dated as of February 15, 1996, as amended as
of February 24, 1998, by and between the Company and The First National Bank of
Boston, as Rights Agent (collectively, the "Shares"), at a price of $24.00 per
Share, net to the Seller in cash, upon the terms and subject to the conditions
set forth in the Offer. The Offer is being made in connection with the Agreement
and Plan of Merger, dated as of February 24, 1998, among Parent, Offeror, WDR
Sub Corp., a Delaware corporation and a wholly owned subsidiary of Offeror, and
the Company (the "Merger Agreement"). Holders of Shares whose certificates for
such Shares (the "Certificates") are not immediately available or who cannot
deliver their Certificates and all other required documents to the Depositary or
complete the procedures for book-entry transfer prior to the Expiration Date (as
defined in the Offer to Purchase) must tender their Shares according to the
guaranteed delivery procedures set forth in Section 3 of the Offer to Purchase.
 
     WE ARE (OR OUR NOMINEE IS) THE HOLDER OF RECORD OF SHARES HELD BY US FOR
YOUR ACCOUNT. A TENDER OF SUCH SHARES CAN BE MADE ONLY BY US AS THE HOLDER OF
RECORD AND PURSUANT TO YOUR INSTRUCTIONS. THE LETTER OF TRANSMITTAL IS FURNISHED
TO YOU FOR YOUR INFORMATION ONLY AND CANNOT BE USED TO TENDER SHARES HELD BY US
FOR YOUR ACCOUNT.
 
     Accordingly, we request instructions as to whether you wish us to tender on
your behalf any or all of the Shares held by us for your account, pursuant to
the terms and conditions set forth in the Offer.
 
     Please note the following:
 
          1. The tender price is $24.00 per Share, net to the seller in cash.
 
          2. The Offer is subject to a Minimum Condition (as defined in the
     Offer to Purchase) and certain other conditions. See Sections 1 and 15 of
     the Offer to Purchase.
 
          3. The Offer is being made for all of the outstanding Shares.
 
          4. Tendering stockholders will not be obligated to pay brokerage fees
     or commissions or, except as otherwise provided in Instruction 6 of the
     Letter of Transmittal, transfer taxes on the purchase of Shares by Offeror
     pursuant to the Offer. However, federal income tax backup withholding at a
     rate of 31% may be required, unless an exemption is provided or unless the
     required taxpayer identification information is provided. See Instruction
     10 of the Letter of Transmittal.
<PAGE>   2
 
          5. The Offer and withdrawal rights will expire at 12:00 Midnight, New
     York City time, on Friday, April 3, 1998, unless the Offer is extended.
 
          6. The Board of Directors of the Company (the "Board") has unanimously
     approved the Offer and the Merger Agreement (as defined in the Offer to
     Purchase) and determined that the Offer and the Merger are fair to and in
     the best interests of the Company and its stockholders and unanimously
     recommends that the stockholders accept the Offer and tender their Shares.
 
          7. Notwithstanding any other provision of the Offer, payment for
     Shares accepted for payment pursuant to the offer will in all cases be made
     only after timely receipt by the Depositary of (a) Certificates pursuant to
     the procedures set forth in Section 3 of the Offer to Purchase, or a timely
     Book-Entry Confirmation (as defined in Section 2 of the Offer to Purchase)
     with respect to such Shares, (b) the Letter of Transmittal (or a manually
     signed facsimile thereof), properly completed and duly executed, with any
     required signature guarantees or, in the case of a book-entry transfer, an
     Agent's Message (as defined in Section 2 of the Offer to Purchase) and (c)
     any other documents required by the Letter of Transmittal. Accordingly,
     payment may not be made to all tendering stockholders at the same time
     depending upon when Certificates are actually received by the Depositary.
 
     If you wish to have us tender any or all of the Shares held by us for your
account, please so instruct us by completing, executing, detaching and returning
to us the instruction form set forth below. If you authorize the tender of your
Shares, all such Shares will be tendered unless otherwise specified below. YOUR
INSTRUCTIONS TO US SHOULD BE FORWARDED PROMPTLY TO US IN AMPLE TIME TO PERMIT US
TO SUBMIT A TENDER ON YOUR BEHALF PRIOR TO THE EXPIRATION OF THE OFFER.
 
     The Offer is not being made to (nor will tenders be accepted from or on
behalf of) holders of Shares residing in any jurisdiction in which the making of
the offer or the acceptance thereof would not be in compliance with the
securities, blue sky or other laws of such jurisdiction. However, Offeror may,
in its discretion, take such action as it may deem necessary to make the Offer
in any jurisdiction and extend the Offer to holders of shares in such
jurisdiction.
 
     In any jurisdiction where the securities, blue sky or other laws require
the Offer to be made by a licensed broker or dealer, the Offer will be deemed to
be made on behalf of Offeror by Merrill Lynch, Pierce, Fenner & Smith
Incorporated or one or more registered brokers or dealers that are licensed
under the laws of such jurisdiction.
 
                                        2
<PAGE>   3
 
                          INSTRUCTIONS WITH RESPECT TO
                         THE OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
                                       OF
                             WONDERWARE CORPORATION
                                       BY
                             WDR ACQUISITION CORP.
 
     The undersigned acknowledge(s) receipt of your letter, the enclosed Offer
to Purchase of WDR Acquisition Corp. dated March 2, 1998, and the related Letter
of Transmittal (which together constitute the "Offer") in connection with the
offer by WDR Acquisition Corp., a Delaware corporation and an indirect wholly
owned subsidiary of Siebe plc, a public limited company organized under the laws
of England, to purchase all outstanding shares of Common Stock of Wonderware
Corporation, a Delaware corporation, including the associated preferred stock
purchase rights issued pursuant to the Rights Agreement, dated as of February
15, 1996, as amended February 24, 1998, by and between the Company and The First
National Bank of Boston, as Rights Agent (collectively, the "Shares").
 
     This will instruct you to tender to Offeror the number of Shares indicated
below (or if no number is indicated below, all Shares) which are held by you for
the account of the undersigned, upon the terms and subject to the conditions set
forth in the Offer.
- ------------------------------------------------------------
 
 Number of Shares to be Tendered:*
- ------------------
- ------------------------------------------------------------
 
                                                        SIGN HERE
 
Account Number:                           --------------------------------------
 
Date: , 1998                              --------------------------------------
                                                       Signature(s)
 
                                          --------------------------------------
 
                                          --------------------------------------
                                                     (Print Name(s))
 
                                          --------------------------------------
 
                                          --------------------------------------
                                                   (Print Address(es))
 
                                          --------------------------------------
                                           (Area Code and Telephone Number(s))
 
                                          --------------------------------------
                                               (Taxpayer Identification or
                                                Social Security Number(s))
 
- ---------------
 
* Unless otherwise indicated, it will be assumed that all Shares held by us for
  your account are to be tendered.
                                        3

<PAGE>   1
 
                         NOTICE OF GUARANTEED DELIVERY
                      FOR TENDER OF SHARES OF COMMON STOCK
                                       OF
 
                             WONDERWARE CORPORATION
                                       AT
 
                              $24.00 NET PER SHARE
                                       BY
 
                             WDR ACQUISITION CORP.
                     AN INDIRECT WHOLLY OWNED SUBSIDIARY OF
 
                                   SIEBE PLC
 
         THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT,
         NEW YORK CITY TIME, ON FRIDAY, APRIL 3, 1998, UNLESS EXTENDED.
 
     This Notice of Guaranteed Delivery or one substantially equivalent hereto
must be used to accept the Offer (as defined below) if certificates representing
the Common Stock, $0.001 par value per share of Wonderware Corporation, a
Delaware Corporation (the "Company"), including the associated preferred stock
purchase rights issued pursuant to the Rights Agreement, dated as of February
15, 1996, as amended as of February 24, 1998, by and between the Company and The
First National Bank of Boston, as Rights Agent (collectively, the "Shares"), are
not immediately available or the procedures for book-entry transfer cannot be
completed on a timely basis or time will not permit all required documents to
reach Bankers Trust Company (the "Depositary") prior to the Expiration Date (as
defined in Section 1 of the Offer to Purchase). This Notice of Guaranteed
Delivery may be delivered by hand or transmitted by facsimile transmission or
United States mail, overnight mail or courier to the Depositary. See Section 3
of the Offer to Purchase.
 
                        The Depositary for the Offer is:
                             BANKERS TRUST COMPANY
 
<TABLE>
<S>                                <C>                                <C>
             By Mail:                           By Hand:                By Overnight Mail or Courier:
   BT Services Tennessee, Inc.           Bankers Trust Company           BT Services Tennessee, Inc.
       Reorganization Unit           Corporate Trust & Agency Group     Corporate Trust & Agency Group
         P.O. Box 292737               Receipt & Delivery Window             Reorganization Unit
     Nashville, TN 37229-2737       123 Washington Street, 1st Floor       648 Grassmere Park Road
                                           New York, NY 10006                Nashville, TN 37211
                                         Facsimile Copy Number:
                                             (615) 835-3701
                                    (For Eligible Institutions Only)
                                      For Confirmation Telephone:
                                             (615) 835-3572
                                       For Information Telephone:
                                             (800) 735-7777
</TABLE>
 
                            ------------------------
 
     DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS OTHER THAN AS
SET FORTH ABOVE OR TRANSMISSION OF INSTRUCTIONS VIA A FACSIMILE TRANSMISSION TO
A NUMBER OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY.
 
     This Notice of Guaranteed Delivery is not to be used to guarantee
signatures. If a signature on a Letter of Transmittal is required to be
guaranteed by an "Eligible Institution" under the instructions thereto, such
signature guarantee must appear in the applicable space provided in the
signature box on the Letter of Transmittal.
 
     The Eligible Institution that completes this form must communicate the
guarantee to the Depositary and must deliver the Letter of Transmittal and
certificates for Shares to the Depositary within the time period shown herein.
Failure to do so could result in a financial loss to such Eligible Institution.
 
              THE GUARANTEE ON THE REVERSE SIDE MUST BE COMPLETED.
<PAGE>   2
 
Ladies and Gentlemen:
 
     The undersigned hereby tenders to WDR Acquisition Corp., a Delaware
corporation ("Offeror") and an indirect wholly owned subsidiary of Siebe plc, a
public limited company organized under the laws of the United Kingdom
("Parent"), upon the terms and subject to the conditions set forth in the Offer
to Purchase, dated March 2, 1998 (the "Offer to Purchase"), and in the related
Letter of Transmittal (which together constitute the "Offer"), receipt of which
is hereby acknowledged, the number of Shares indicated below pursuant to the
guaranteed delivery procedure set forth in Section 3 of the Offer to Purchase.
Number of Shares:
 
Certificate Numbers (if available):
 
======================================
Check ONE box if Share(s) will be
tendered
by book entry transfer:
[ ] The Depositary Trust Company
[ ] Philadelphia Depositary Trust
Company
Account No.:
 
Date:
 
                THE GUARANTEE SET FORTH BELOW MUST BE COMPLETED
 
                                   GUARANTEE
                    (Not to be used for signature guarantee)
 
     The undersigned, an Eligible Institution (as defined in Section 3 of the
Offer to Purchase), hereby guarantees to deliver to the Depositary the
certificates representing Shares tendered hereby, in proper form for transfer,
or a Book-Entry Confirmation (as defined in Section 2 of the Offer to Purchase)
with respect to such Shares, in either case together with a properly completed
and duly executed Letter of Transmittal (or a manually signed facsimile
thereof), with any required signature guarantees, and any other documents
required by the Letter of Transmittal, all within five NASDAQ/National Market
System trading days after the date hereof.
Name of Firm:
Address:
- --------------------------------------
              (Zip Code)
Area Code and Tel. No.:
 
NOTE: DO NOT SEND CERTIFICATES FOR SHARES WITH THIS NOTICE OF GUARANTEED
      DELIVERY. CERTIFICATES FOR SHARES SHOULD BE SENT ONLY TOGETHER WITH YOUR
      LETTER OF TRANSMITTAL.
                                          Name(s) of Record Holder(s):
 
                                          --------------------------------------
 
                                          --------------------------------------
                                                  (Please Type or Print)
                                          Address(es):
 
                                          --------------------------------------
 
                                          --------------------------------------
                                                        (Zip Code)
 
                                          Area Code and Tel. No(s).:
                                          Signature(s):
 
                                          ======================================
                                                  (Authorized Signature)
                                          Name:   (Please Type or Print)
                                          Title:
                                          Date:
                                        2

<PAGE>   1
 
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
 
GUIDELINES FOR DETERMINING THE PROPER IDENTIFICATION NUMBER TO GIVE THE
PAYER -- Social Security numbers have nine digits separated by two hyphens: i.e.
000-00-0000. Employer identification numbers have nine digits separated by only
one hyphen: i.e. 00-0000000. The table below will help determine the number to
give the Payer.
 
<TABLE>
<C>  <S>                            <C>
- -----------------------------------------------------------
                                    GIVE THE NAME AND
FOR THIS TYPE OF ACCOUNT:           SOCIAL SECURITY
                                    NUMBER OF --
===========================================================
                                    GIVE THE NAME AND
FOR THIS TYPE OF ACCOUNT:           EMPLOYER
                                    IDENTIFICATION
                                    NUMBER OF --
- -----------------------------------------------------------
  1. Individual                     The individual
  2. Two or more individuals        The actual owner of the
     (joint account)                account or, if combined
                                    funds, the first
                                    individual on the
                                    account(1)
  3. Custodian account of a minor   The Minor(2)
     (Uniform Gift to Minors Act)
  4. a. The usual revocable         The grantor-
     savings trust (grantor is      trustee(1)
        also trustee)
     b. So-called trust account     The actual owner(1)
     that is not a legal or valid
        trust under state law
  5. Sole proprietorship            The owner(3)
  6. Sole proprietorship            The owner(3)
  7. A valid trust, estate or       The legal entity (Do
     pension trust                  not furnish the
                                    identifying number of
                                    the personal
                                    representative or
                                    trustee unless the
                                    legal entity itself is
                                    not designated in the
                                    account title.)(4)
  8. Corporate                      The corporation
  9. Association, club, religious,  The organization
     charitable, educational, or
     other tax-exempt organization
 10. Partnership                    The partnership
 11. A broker or registered         The broker or nominee
     nominee
 12. Account with the Department    The public entity
     of Agriculture in the name of
     a public entity (such as a
     State or local government,
     school district, or prison)
     that receives agricultural
     program payments
</TABLE>
 
=============================================================
 
(1) List first and circle the name of the person whose number you furnish. If
    only one person on a joint account has a SSN, that person's number must be
    furnished.
 
(2) Circle the minor's name and furnish the minor's social security number.
 
(3) You must show your individual name, but you may also enter your business or
    "doing business as" name. You may use either your social security number or
    employment identification number (if you have one).
 
(4) List first and circle the name of the legal trust, estate or pension trust.
 
NOTE:If no name is circled when there is more than one name, the number will be
     considered to be that of the first name listed.
<PAGE>   2
 
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
 
                         NUMBER ON SUBSTITUTE FORM W-9
 
                                     PAGE 2
 
OBTAINING A NUMBER
If you don't have a taxpayer identification number or you don't know your
number, obtain Form SS-5, Application for a Social Security Number Card, or Form
SS-4, Application for Employer Identification Number (for businesses and all
other entities), or Form W-7 for Individual Taxpayer Identification Number (for
alien individuals required to file U.S. tax returns), at an office of the Social
Security Administration or the Internal Revenue Service.
 
PAYEES EXEMPT FROM BACKUP WITHHOLDING
Payees specifically exempted from backup withholding on all payments include the
following:
 
  -- A financial institution.
  -- An organization exempt from tax under section 501(a), or an individual
     retirement plan, or a custodial account under Section 403(b)(7).
  -- The United States or any agency or instrumentality thereof.
  -- A State, the District of Columbia, a possession of the United States, or
     any political subdivision or instrumentality thereof.
  -- A foreign government, a political subdivision of a foreign government, or
     any agency or instrumentality thereof.
  -- An international organization or any agency, or instrumentality thereof.
Payees that may be exempted from backup withholding:
 
  -- A corporation.
  -- A registered dealer in securities or commodities registered in the U.S. or
     a possession of the U.S.
  -- A real estate investment trust.
  -- A common trust fund operated by a bank under section 584(a).
  -- An entity registered at all times during the tax year under the Investment
     Company Act of 1940.
  -- A foreign central bank of issue.
Payments of dividends and patronage dividends not generally subject to backup
withholding include the following:
  -- Payments to nonresident aliens subject to withholding under section 1441.
  -- Payments to partnerships not engaged in a trade or business in the U.S. and
     which have at least one nonresident partner.
  -- Payments of patronage dividends where the amount received is not paid in
     money.
  -- Payments made by certain foreign organizations.
Payments of interest not generally subject to backup withholding include the
following:
  -- Payments of interest on obligations issued by individuals.
  NOTE: You may be subject to backup withholding if this interest is $600 or
   more and is paid in the course of the payer's trade or business and you have
   not provided your correct taxpayer identification number to the payer.
  -- Payments of tax-exempt interest (including exempt-interest dividends under
     section 852).
  -- Payments described in section 6049(b)(5) to nonresident aliens.
  -- Payments on tax-free covenant bonds under section 1451.
  -- Payments made by certain foreign organizations.
  -- Mortgage interest paid to you.
 
Exempt payees described above should file a Substitute Form W-9 to avoid
possible erroneous backup withholding. FILE THIS FORM WITH THE PAYER, FURNISH
YOUR TAXPAYER IDENTIFICATION NUMBER, WRITE "EXEMPT" ON THE FACE OF THE FORM, AND
RETURN IT TO THE PAYER. IF THE PAYMENTS ARE INTEREST, DIVIDENDS, OR PATRONAGE
DIVIDENDS, ALSO SIGN AND DATE THE FORM.
  Certain payments other than interest, dividends, and patronage dividends that
are not subject to information reporting are also not subject to backup
withholding. For details, see sections 6041, 6041A(a), 6042, 6044, 6045, 6049,
6050A, and 6050N, and their regulations.
 
PRIVACY ACT NOTICE.--Section 6109 requires most recipients of dividend,
interest, or other payments to give taxpayer identification numbers to payers
who must report the payments to the IRS. The IRS uses the numbers for
identification purposes and to help verify the accuracy of your tax return.
Payers must be given the numbers whether or not recipients are required to file
tax returns. Payers must generally withhold 31% of taxable interest, dividend
and certain other payments to a payee who does not furnish a taxpayer
identification number to a payer. Certain penalties may also apply.
 
PENALTIES
(1) PENALTY FOR FAILURE TO FURNISH TAXPAYER IDENTIFICATION NUMBER.--If you fail
to furnish your correct taxpayer identification number to a payer, you are
subject to a penalty of $50 for each such failure unless your failure is due to
reasonable cause and not to willful neglect.
(2) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING.--If you
make a false statement with no reasonable basis which results in no imposition
of backup withholding, you are subject to a penalty of $500.
(3) CRIMINAL PENALTY FOR FALSIFYING INFORMATION.--Falsifying certifications or
affirmations may subject you to criminal penalties including fines and/or
imprisonment.
FOR ADDITIONAL INFORMATION CONTACT YOUR TAX CONSULTANT OR THE INTERNAL REVENUE
SERVICE.

<PAGE>   1
 
THIS ANNOUNCEMENT IS NEITHER AN OFFER TO PURCHASE NOR A SOLICITATION OF AN OFFER
 TO SELL SHARES. THE OFFER IS MADE SOLELY BY THE OFFER TO PURCHASE, DATED MARCH
  2, 1998, AND THE RELATED LETTER OF TRANSMITTAL AND IS NOT BEING MADE TO, AND
  TENDERS WILL NOT BE ACCEPTED FROM OR ON BEHALF OF, HOLDERS OF SHARES IN ANY
 JURISDICTION IN WHICH THE MAKING OF THE OFFER OR THE ACCEPTANCE THEREOF WOULD
NOT BE IN COMPLIANCE WITH THE LAWS OF SUCH JURISDICTION. IF THE SECURITIES LAWS
OF ANY JURISDICTION REQUIRE THE OFFER TO BE MADE BY A LICENSED BROKER OR DEALER,
   THE OFFER SHALL BE DEEMED TO BE MADE ON BEHALF OF WDR ACQUISITION CORP. BY
MERRILL LYNCH & CO. OR ONE OR MORE REGISTERED BROKERS OR DEALERS LICENSED UNDER
                         THE LAWS OF SUCH JURISDICTION.
 
                          NOTICE OF OFFER TO PURCHASE
                     ALL OUTSTANDING SHARES OF COMMON STOCK
 
          (INCLUDING THE ASSOCIATED PREFERRED STOCK PURCHASE RIGHTS)
                                       OF
 
                             WONDERWARE CORPORATION
                                       AT
 
                          $24.00 NET PER SHARE IN CASH
                                       BY
 
                             WDR ACQUISITION CORP.
                     AN INDIRECT WHOLLY-OWNED SUBSIDIARY OF
 
                                   SIEBE PLC
 
     WDR Acquisition Corp., a Delaware corporation (the "Purchaser") and an
indirect wholly-owned subsidiary of Siebe plc, a public limited company
organized under the laws of England ("Parent"), is offering to purchase all
outstanding shares of Common Stock, par value $0.001 per share of Wonderware
Corporation, a Delaware corporation (the "Company"), including the associated
preferred stock purchase rights (the "Rights") issued pursuant to the Rights
Agreement, dated as of February 15, 1996, by and between the Company and The
First National Bank of Boston, as Rights Agent (the "Shares"), at a purchase
price of $24.00 per Share (such amount, or any greater amount per Share paid
pursuant to the Offer (as defined below), being hereinafter referred to as 
the "Offer Price"), net to the seller in cash, without interest thereon, less 
any required withholding taxes, upon the terms and subject to the conditions 
set forth in the Offer to Purchase, dated March 2, 1998, and the related 
Letter of Transmittal (which together constitute the "Offer"). See the Offer 
to Purchase for capitalized terms used but not defined herein.
 
  THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
         TIME, ON FRIDAY, APRIL 3, 1998, UNLESS THE OFFER IS EXTENDED.
 
     The Offer is conditioned upon, among other things, (i) there being validly
tendered and not withdrawn prior to the Expiration Date (as defined below)
Shares representing not less than a majority of the Shares then outstanding on a
fully diluted basis on the date of purchase (the "Minimum Condition") and (ii)
the expiration or termination of any applicable waiting periods imposed by the
Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended. See Sections 1
and 15 of the Offer to Purchase.
 
     The Offer is not conditioned on obtaining financing.
 
     The Offer is being made pursuant to the Agreement and Plan of Merger, dated
as of February 24, 1998 (the "Merger Agreement"), by and among Parent,
Purchaser, WDR Sub Corp. ("Merger Sub") and the Company. The Merger Agreement
provides, among other things, for the commencement of the Offer by Purchaser and
further provides that, after the purchase of Shares pursuant to the Offer and
subject to the
<PAGE>   2
 
satisfaction or waiver of certain conditions set forth therein, Merger Sub will
be merged with and into the Company (the "Merger"), with the Company surviving
the Merger as an indirect wholly-owned subsidiary of Parent. Pursuant to the
Merger, each outstanding Share (other than (i) Shares owned by Parent, Purchaser
or any subsidiaries thereof or Shares held in the Company's treasury and (ii)
Shares held by holders who have properly exercised their appraisal rights under
the Delaware General Corporation Law (the "DGCL")) immediately prior to the
Effective Time (as defined in the Merger Agreement), will be converted into the
right to receive the Offer Price, in cash, without interest thereon, less any
required withholding of taxes, upon the surrender of certificates formerly
representing such Shares.
 
     THE BOARD OF DIRECTORS OF THE COMPANY (THE "BOARD") HAS UNANIMOUSLY
APPROVED THE OFFER AND THE MERGER AND DETERMINED THAT THE OFFER AND THE MERGER
ARE FAIR TO AND IN THE BEST INTERESTS OF THE COMPANY AND THE HOLDERS OF SHARES
(THE "STOCKHOLDERS") AND UNANIMOUSLY RECOMMENDED THAT THE STOCKHOLDERS ACCEPT
THE OFFER AND TENDER THEIR SHARES.
 
     For purposes of the Offer, Purchaser will be deemed to have accepted for
payment (and thereby purchased) Shares validly tendered to Purchaser and not
withdrawn on or prior to the Expiration Date if, as and when Purchaser gives
oral or written notice to Bankers Trust Company (the "Depositary") of
Purchaser's acceptance for payment of such Shares. Upon the terms and subject to
the conditions of the Offer, payment for Shares accepted for payment pursuant to
the Offer will be made by deposit of the purchase price therefor with the
Depositary, which will act as agent for tendering Stockholders for the purpose
of receiving payment from Purchaser and transmitting payments to tendering
Stockholders. Upon the deposit of funds with the Depositary for the purpose of
making payments to tendering Stockholders, Purchaser's obligation to make such
payment will be satisfied, and tendering Stockholders must thereafter look
solely to the Depositary for payments of amounts owed to them by reason of the
acceptance for payment of Shares pursuant to the Offer.
 
     Pursuant to the terms of the Merger Agreement, Purchaser expressly reserves
the right (but will not be obligated) to waive any or all of the conditions of
the Offer (other than the Minimum Condition) without the prior consent of the
Company. If the Minimum Condition, or any of the other conditions set forth in
Section 15 of the Offer to Purchase, has not been satisfied by 12:00 midnight,
New York City time, on April 3, 1998 (or any other time then set as the
Expiration Date), Purchaser may elect to (i) extend the Offer and, subject to
applicable withdrawal rights, retain all tendered Shares until the expiration of
the Offer, as extended, subject to the terms of the Offer, (ii) subject to
complying with applicable rules and regulations of the Commission and to the
terms of the Merger Agreement, accept for payment all Shares so tendered and not
extend the Offer or (iii) subject to the terms of the Merger Agreement,
terminate the Offer and not accept for payment any Shares and return all
tendered Shares to tendering Stockholders.
 
     Subject to the terms of the Merger Agreement, Purchaser expressly reserves
the right, subject to applicable law, to extend the period of time during which
the Offer is open by giving oral or written notice of such extension to the
Depositary and by making a public announcement of such extension. There can be
no assurance that Purchaser will extend the Offer. Any extension, delay in
payment, termination or amendment will be followed as promptly as practicable by
public announcement, the announcement in the case of an extension to be issued
no later than 9:00 a.m., New York City time, on the next business day after the
previously scheduled Expiration Date. The reservation by Purchaser of the right
to delay acceptance for payment of, or payment for, Shares is subject to the
provisions of Rule 14e-l(c) under the Securities Exchange Act of 1934, as
amended (the "Exchange Act"), which requires that Purchaser pay consideration
offered or return the Shares deposited by or on behalf of Stockholders promptly
after the termination or withdrawal of the Offer. The Purchaser shall not have
any obligation to pay interest on the purchase price for tendered Shares whether
or not the Purchaser exercises its right to extend the Offer.
 
     The term "Expiration Date" means 12:00 midnight, New York City time, on
Friday, April 3, 1998, unless and until Purchaser, in accordance with the terms
of the Offer and the Merger Agreement, shall have extended the period of time
during which the Offer is open, in which event the term "Expiration Date" means
the latest time and date at which the Offer, as so extended, expires.
 
     Tenders of Shares made pursuant to the Offer are irrevocable, except as
otherwise provided in Section 4 of the Offer to Purchase. Shares tendered
pursuant to the Offer may be withdrawn pursuant to the procedures
<PAGE>   3
 
set forth in Section 4 of the Offer to Purchase at any time prior to the
Expiration Date and, unless theretofore accepted for payment and paid for by
Purchaser pursuant to the Offer, may also be withdrawn at any time after April
30, 1998. For a withdrawal to be effective, a written, telegraphic or facsimile
transmission notice of withdrawal must be timely received by the Depositary at
one of its addresses set forth on the back cover of the Offer to Purchase. Any
such notice of withdrawal must specify the name of the persons who tendered the
Shares to be withdrawn, the number of Shares to be withdrawn and the name of the
registered holder, if different from that of the person who tendered such
Shares. If certificates evidencing Shares to be withdrawn have been delivered or
otherwise identified to the Depositary, then, prior to the physical release of
such certificates, the tendering Stockholder must also submit to the Depositary
the serial numbers shown on the particular certificates evidencing the Shares to
be withdrawn, and the signature on the notice of withdrawal must be guaranteed
by an Eligible Institution (as defined below), except in the case of Shares
tendered for the account of an Eligible Institution. If Shares have been
tendered pursuant to the procedure for book-entry transfer set forth in Section
3 of the Offer to Purchase, the notice of withdrawal must also specify the name
and number of the account at the applicable Book-Entry Transfer Facility to be
credited with the withdrawn Shares and otherwise comply with such Book-Entry
Transfer Facility's procedures. An Eligible Institution is a member firm of a
registered national securities exchange (registered under Section 6 of the
Exchange Act), a member of the National Association of Securities Dealers, Inc.
or a commercial bank or trust company having an office or correspondent in the
United States or any other "Eligible Guarantor Institution," as defined in Rule
17Ad-15 under the Exchange Act.
 
     THE INFORMATION REQUIRED TO BE DISCLOSED BY RULE 14D-6(E)(1)(VII) OF THE
GENERAL RULES AND REGULATIONS UNDER THE EXCHANGE ACT IS CONTAINED IN THE OFFER
TO PURCHASE AND IS INCORPORATED HEREIN BY REFERENCE.
 
     The Company has provided Purchaser with its stockholder list and security
position listings for the purpose of disseminating the Offer to Stockholders.
The Offer to Purchase, the related Letter of Transmittal and other relevant
materials will be mailed to record holders of Shares and will be furnished to
brokers, dealers, commercial banks, trust companies and similar persons whose
names, or the names of whose nominees, appear on the Company's Stockholder list,
or, if applicable, who are listed as participants in a clearing agency's
security position listing for subsequent transmittal to beneficial owners of
Shares.
 
     STOCKHOLDERS ARE URGED TO READ THE OFFER TO PURCHASE AND THE RELATED LETTER
OF TRANSMITTAL CAREFULLY BEFORE DECIDING WHETHER TO TENDER THEIR SHARES PURSUANT
TO THE OFFER.
 
     Questions and requests for assistance or for copies of the Offer to
Purchase, the Letter of Transmittal, the Notice of Guaranteed Delivery or other
related materials may be directed to the Information Agent or the Dealer Manager
at their respective addresses and telephone numbers set forth below, and copies
will be furnished promptly at Purchaser's expense. Holders of Shares may also
contact brokers, dealers, commercial bankers and trust companies for additional
copies of the Offer to Purchase, the Letter of Transmittal, the Notice of
Guaranteed Delivery or other related materials.
 
                    THE INFORMATION AGENT FOR THE OFFER IS:
 
                             D.F. KING & CO., INC.
                                77 WATER STREET
                            NEW YORK, NEW YORK 10005
                                 (800) 714-3310
 
                      THE DEALER MANAGER FOR THE OFFER IS:
 
                              MERRILL LYNCH & CO.
                             WORLD FINANCIAL CENTER
                                  NORTH TOWER
                         NEW YORK, NEW YORK 10281-1314
                         (212) 449-4954 (CALL COLLECT)
March 2, 1998

<PAGE>   1

[LOGO MERRILL LYNCH]                                               NEWS RELEASE
- -------------------------------------------------------------------------------


                                                            24 February 1998


                                   SIEBE plc
                          ----------------------------
                          RECOMMENDED TENDER OFFER FOR
                             WONDERWARE CORPORATION


Siebe plc ("Siebe") has reached agreement with the Board of Directors of
Wonderware Corporation (""Wonderware") on the terms of a recommended cash
tender offer for Wonderware to be made by Siebe in the US (the "Offer"). The
Offer has been unanimously approved by the Board of Directors and has the full
support of the Senior Management of Wonderware. Wonderware is a leading
supplier of Microsoft Windows-based software applications for the industrial
automation market and is quoted on Nasdaq (WNDR).

The Offer:

o  values each Wonderware share at $24.00 (Pounds 14.63) in cash; 

o  values Wonderware at approximately $375 million (Pounds 228 million),
   exclusive of $51.5 million (Pounds 31.4 million) net cash balances held by
   Wonderware);

o  represents a premium of 50 per cent, to the closing middle market price of
   $16.00 (Pounds 9.76) per Wonderware Share on 23 February 1998 (the last
   business day prior to this announcement);

o  represents, on a fully diluted basis, a multiple of 57.8 times Wonderware's
   earnings before interest and tax (pre exceptional items) for the year ended
   31 December 1997 and 66.1 times Wonderware's profits after tax (pre
   exceptional items) for the year ended 31 December 1997;

o  recognises the recent significant strengthening of Wonderware's financial
   performance and expected strong future performance (Wonderware reported
   fourth quarter 1997 turnover of $23.7 million (Pounds 14.5 million) and
   operating profit of $4.2 million (Pounds 2.6 million)); and

o  is to be funded from existing Siebe lines of credit.

Siebe is one of Britain's largest diversified engineering and electronics
groups, incorporating over 200 companies and employing over 50,000 people
worldwide. The Group designs and manufactures temperature and appliance
controls, process automation and control systems, and industrial equipment.
Siebe's Control Systems division is a world leader in the commercial building,
factory and process automation and systems markets. Leading subsidiaries of
Siebe Control Systems include Foxboro, Barber-Colman, Triconex and APV. For the
financial year ended 5 April 1997, Siebe reported turnover of Pounds 3,005.3
million with profit before tax of Pounds 424.1 million. For the 6 months ended
30 September 1997, Siebe


                                       1
<PAGE>   2
reported turnover of Pounds 1,706.5 million with profit before tax of Pounds
221.7 million. Siebe's current equity capitalisation is Pounds 5.8 billion.

Founded in 1987, Wonderware pioneered Microsoft Windows-based software for
developing industrial automation applications. The company's FactorySuite(TM)
product line is an integrated suite of easy-to-use software tools for creating
any factory application, providing one of the broadest ranges of functionality
available on the market today. Based in Irvine, California, Wonderware has
regional offices in the U.S., Europe, Latin America and Asia to provide support
to its network of nearly 150 distributor offices. For the financial year ended
31 December 1997, Wonderware reported turnover of $82.5 million with profit
before tax of $5.9 million ($7.8 million before an exceptional charge of $1.9
million) and net assets of $86.5 million. In the fourth quarter ended 31
December 1997, Wonderware reported turnover of $23.7 million with profit before
tax of $4.6 million. The increased level of Wonderware profits in the fourth
quarter 1997 in part reflected the expanding market penetration of the
FactorySuite(TM) product.

The acquisition of Wonderware will enable Siebe to:

o  add to the established achievements of Wonderware's management team by
   providing access to Siebe's global sales and distribution network and provide
   Siebe with strong additional cross opportunities for Siebe Control Systems;

o  provide Wonderware with additional technological leadership through the
   provision of Siebe's object driven technology into Wonderware's
   FactorySuite(TM) product line;

o  gain much broader exposure to the small/medium size user of Microsoft
   Windows-based process and factory controls and systems;

o  extend its leadership in process control systems;

o  bring the financial resources and technical marketing strength of Siebe to
   Wonderware ensuring the continued development and acceptance of Wonderware's
   products as the industry standard in its market.

It is the strong intention that the current Wonderware management team will
continue in their existing roles following the acquisition.

Allen Yurko, Chief Executive of Siebe, said:

"We are excited about the opportunity this acquisition gives Siebe to further
expand our Windows NT-based industrial automation software product range.
Industrial automation is clearly a core area of focus for Siebe and more
recently our significant success at launching the Foxboro I/A(R) system on
Microsoft Windows NT was an important strategic milestone. The acquisition of
Wonderware and its high growth FactorySuite(TM) software products will clearly
complement Siebe's already strong software position in batch and process
applications, providing Siebe with the broadest range of both UNIX and Windows
NT software for the industrial automation market."

Roy Slavin,  Chairman and Chief Executive of Wonderware, said:

"We're pleased with this transaction and excited by the strategic alliance this
represents going forward. Our shareholders will receive a significant premium
to Wonderware's current market value. Our customers will benefit from the
association with a powerful and experienced global group that is committed to a
fully integrated range of industrial

                                       2
<PAGE>   3
automation software products. In addition, our employees and distributors will
benefit from the opportunities soon to be available across a broader industrial
stage."


ENQUIRIES:

SIEBE PLC
Allen Yurko, Chief Executive
Barry Francis, Group Public Relations Director
Telephone: +44 1753 855 411

WONDERWARE CORPORATION
Roy Slavin, Chairman and Chief Executive
Sam Auriemma, Vice President, CFO
Telephone +714 450-7967

MERRILL LYNCH
Philip Yates, Managing Director
Telephone: +44 171 628 1000

COLLEGE HILL - LONDON
Alex Sandberg
Gareth David

Telephone: +44 171 457 2020

TAYLOR RAFFERTY - NEW YORK
Jim Prout
Alison Kirby
Telephone: +212 889-4350

CONFERENCE CALL FOR ANALYSTS AND INSTITUTIONS

A dial-in conference call for analysts and institutions, to be chaired by Allen
Yurko, chief executive of Sieve, has been arranged for today at 3.00pm London
time and 10.00am New York time. The contact telephone number is 0181 781 0579
in the UK and 0800 857 5752 in the USA.

Merrill Lynch International, which is regulated in the UK by the Securities
and Futures Authority Limited, is acting for Siebe and no one else in connection
with the Offer and will not be responsible to anyone other than Siebe for
providing the protections afforded to its customers or for giving advice in
relation to the Offer.



                                       3
<PAGE>   4
Note:

1.   US Dollar equivalents based on an exchange rate at 23rd February 1998 of
     $1.64 per Pound Sterling.

2.   Offer value based on fully diluted share capital (representing 14.3 million
     issued shares and 2.2 million options). The Offer value includes net
     proceeds of $22 million receivable by Wonderware in respect of options
     exercisable at an average exercise price of $10.02.

3.   The Offer will be commenced within 5 business days of this announcement and
     will be conditional on a majority of Wonderware's shares being tendered by
     Wonderware shareholders and other customary conditions.

END





                                       4

<PAGE>   1


                                                          FOR IMMEDIATE RELEASE



U.K.-BASED SIEBE PLC TO ACQUIRE WONDERWARE CORPORATION


        IRVINE, CALIF., FEB. 24, 1998 -- Siebe plc and Wonderware Corporation
(Nasdaq Trading Symbol: WNDR) announced today that Siebe has entered into a
definitive agreement to acquire Wonderware for $24 per share in cash, or
approximately $375 million.

        The offer was unanimously approved by Wonderware's Board of Directors.
Siebe plc expects to initiate a cash tender offer as soon as possible to
complete the transaction, which is expected to occur in April of 1998.

        Founded in 1987, Wonderware pioneered Microsoft Windows-based software
for developing industrial automation applications. The company's
FactorySuite(TM) product line is an integrated suite of easy-to-use software
tools for creating factory applications and provides one of the broadest ranges
of functionality available on the market today. Based in Irvine, Calif.,
Wonderware has regional offices in the U.S., Europe, Latin America and Asia to
provide support to its network of nearly 150 distributor offices. The company
reported record revenues of $82.5 million for 1997.

        "We are excited about the opportunity this acquisition gives Siebe to
further expand our Windows NT-based industrial automation software product
range," said Allen Yurko, Siebe managing director and chief executive officer.
"Industrial automation is clearly a core area for

<PAGE>   2
Siebe and our recent significant success at launching the Foxboro I/A system on
Microsoft Windows NT was an important strategic milestone.

        "The acquisition of Wonderware and its high growth FactorySuite
software products will clearly complement our already strong software position
in batch and process applications, providing Siebe with the broadest range of
both UNIX and Windows NT software for the industrial automation market," Yurko
added.

        "We're pleased with this transaction and excited by the strategic
alliance this represents going forward," said Roy H. Slavin, Wonderware
chairman, president and chief executive officer. "Our shareholders will receive
a significant premium to Wonderware's current market value. Our customers will
benefit from the association with a powerful and experienced global group that
is committed to a fully integrated range of industrial automation software
products. In addition, our employees and distributors will benefit from the
opportunities that will soon be available across a broader industrial stage."

        Siebe intends to finance the acquisition of Wonderware with existing
lines of credit. Siebe expects to promptly commence a tender offer, at $24 per
share, for all outstanding shares of Wonderware. The offer is subject to the
condition that a majority of the shares are tendered and other customary
conditions. If the tender offer is successful, it will be followed as promptly
as possible by a merger in which any remaining shares of Wonderware stock will
be converted into the right to receive $24 per share in cash. Siebe was advised
in the acquisition by Merrill Lynch. Wonderware was advised by Hambrecht &
Quist LLC.

        Siebe, based in Windsor, Berkshire, is one of Britain's largest
diversified engineering and electronics groups, incorporating more than 200
companies and employing more than 50,000 people worldwide. The group designs
and manufactures temperature and appliance controls, process automation and
control systems, and industrial equipment. Leading


                                                                               2
<PAGE>   3
subsidiaries of Siebe Control Systems include Foxboro, Barber-Colman, Triconex
and APV. For the year ended April 5, 1997, Siebe reported revenues of more than
Pounds 3 billion (approximately US$4.95 billion).

        This news release contains forward-looking statements that involve
risks and uncertainties, including the risks associated with satisfying the
various conditions to closing the proposed transaction. Certain of these
factors as well as additional risks and uncertainties, are detailed from time
to time in Wonderware's periodic filings with the Securities and Exchange
Commission.


        For more information, contact:

SIEBE PLC
Allen Yurko, Chief Executive
Barry Francis, Group Public Relations Director
Telephone: (+44) 1753 855 411

WONDERWARE CORPORATION
Roy Slavin, Chairman & CEO
Sam Auriemma, Vice President, CFO
Telephone (714) 450-7967


CONFERENCE CALL FOR ANALYSTS AND INSTITUTIONS

A dial-in conference call for analysts and institutions, to be chaired by Allen
Yurko, chief executive of Siebe, has been arranged for today (2/24/98) at 3:00
p.m. London time, 10:00 a.m. New York time, and 7:00 a.m. California time. The
contact telephone number in the U.K. is 0181 781 0579 and in the U.S.A. is (800)
857-5752.




                                                                              3

<PAGE>   1

[SIEBE LETTERHEAD AND LOGO]



FOR IMMEDIATE RELEASE
- ---------------------


          SIEBE PLC COMMENCES TENDER OFFER FOR WONDERWARE CORPORATION

New York, March 2, 1998 -- British-based Siebe plc ("Siebe") announced today
that its indirect wholly owned subsidiary, WDR Acquisition Corp., is today
commencing its tender offer for all outstanding shares of Common Stock of
Wonderware Corporation (NASDAQ:WNDR) ("Wonderware"), at a price of $24.00 per
share, net in cash. The offer, which has been unanimously approved and
recommended by Wonderware's Board of Directors, is being made pursuant to the
merger agreement between the companies, which was announced on February 24,
1998.

The tender offer, which is currently scheduled to expire at 12:00 midnight, New
York City time, Friday, April 3, 1998, unless extended, is subject to the tender
by Wonderware shareholders of that number of shares of Wonderware which would
represent a majority of the outstanding shares of Wonderware on a fully diluted
basis and other customary conditions.

Siebe is one of Britain's largest diversified engineering and electronics
groups, incorporating over 200 companies and employing over 50,000 people
worldwide. The Group designs and manufactures temperature and appliance
controls, process automation and control systems, and industrial equipment.
Siebe's Control Systems division is a world leader in the commercial building,
factory and process automation and systems markets.

Founded in 1987, Wonderware pioneered Microsoft Windows-based software for
developing industrial automation applications. The Company's FactorySuite(TM)
product line is an integrated suite of easy-to-use software tools for creating
factory applications and provides one of the broadest ranges of functionality
available on the market today.

Merrill Lynch, Pierce, Fenner & Smith Incorporated is acting as dealer manager
for the tender offer, D.F. King & Co., Inc. is acting as information agent, and
Bankers Trust Company is acting as depositary.

For more information, contact: Siebe plc, Allen Yurko, Chief Executive Officer,
Barry Francis, Group Public Relations Director, Telephone: (+44) 1753-855-411;
D.F. King & Co., Inc., Thomas A. Long, Telephone: (212) 493-6920; Taylor
Rafferty Associates, James P. Prout, (212) 889-4350.

<PAGE>   1
                     [Letterhead of Wonderware Corporation]

                                                               February 17, 1998

PERSONAL AND CONFIDENTIAL

Mr. Jim Bays
Siebe PLC
Saxon House
2-4 Victoria Street
Windsor, Berkshire, SL4 1EN

Gentlemen:

         In connection with consideration by Siebe PLC ("Siebe") of a possible
transaction with Wonderware Corporation ("Wonderware"), each of Siebe and
Wonderware has requested information concerning the other. As a condition to
each party being furnished such information regarding the other, each party who
receives any information hereunder (the "Receiving Party") agrees to treat any
information concerning the other which is furnished by or on behalf of the other
party (the "Disclosing Party") whether furnished on or after the date of this
letter agreement (herein collectively referred to as the "Evaluation Material")
in accordance with the provisions of this letter agreement (this "Agreement").
The term "Evaluation Material" does not include information which (i) was or
becomes generally available to the public other than as a result of a disclosure
by the Receiving Party or its directors, officers, employees, agents or
advisors, or (ii) was or becomes available to the Receiving Party on a
nonconfidential basis from a source other than the Disclosing Party to be bound
by a written confidentiality obligation with the Disclosing Party, or (iii) was
within the Receiving Party's possession prior to it being furnished to the
Receiving Party by or on behalf of the Disclosing Party, provided that the
source of such information was not known by the Receiving Party to be bound by a
confidentiality obligation with the Disclosing Party in respect thereof, or (iv)
was demonstrated by the Receiving Party to have been independently developed by
Receiving Party.

         Each party hereby agrees that the Evaluation Material provided by or on
behalf of the other party will be used by the Receiving Party solely for the
purpose of evaluating a possible transaction involving the Disclosing Party, and
that, except as required by law, such information will be kept strictly
confidential by Receiving Party and its advisors; provided, however, that (i)
any such information may be disclosed to the Receiving Party's directors,
officers, employees, advisors and representatives of the Receiving Party's
advisors who need to know such information (collectively "Informed Person") for
the purpose of evaluating any such possible transaction involving the Disclosing
Party and the Receiving Party (it being agreed that all Informed Persons shall
be informed by

<PAGE>   2

February 17, 1998
Page 2


the Receiving Party of the confidential nature of such information and the
Receiving Party shall instruct them to treat such information confidentially,
and (ii) any disclosure of such information may be made to which the Disclosing
Party consents in writing. Without prior written consent of Disclosing Party,
Receiving Party will not, except as required by law, and will direct all its
Informed Persons not to, except as required by law, disclose to any person
either the fact that discussions or negotiations are taking place concerning a
possible transaction involving Disclosing Party or any of the terms, conditions
or other facts with respect to any such possible transaction, including the
status thereof. The term "person" as used in this agreement shall be broadly
interpreted to include, without limitation, any corporation, company, group,
partnership, other entity or individual.

         Receiving Party hereby acknowledges that Receiving Party is aware, and
that Receiving Party will advise all Informed Persons, that the United States
securities laws prohibit any person who has material, nonpublic information
concerning the matters which are the subject of this Agreement from purchasing
or selling securities of a company which may be a party to a transaction of a
type contemplated by this Agreement or from communicating such information to
any other person under circumstances in which it is reasonably foreseeable that
such person is likely to purchase or sell such securities.

         In the event that Receiving Party is requested or required (by oral
questions, interrogatories, requests for information or documents, subpoena,
civil investigative demand or similar process) to disclose any information
supplied to Receiving Party in the course of Receiving Party's dealings with
Disclosing Party or its representatives, it is agreed that Receiving Party will
(i) provide Disclosing Party with prompt notice of such request(s) and the
documents requested thereby so that Disclosing Party may seek an appropriate
protective order and/or waive Receiving Party's compliance with the provisions
of this Agreement, and (ii) consult with Disclosing Party on the advisability of
taking legally available steps to resist or narrow such request. It is further
agreed that if in the absence of a protective order or the receipt of a waiver
hereunder Receiving Party is nonetheless, on the advice of Receiving Party's
counsel, compelled to disclose information concerning Disclosing Party to any
tribunal or else stand liable for contempt or suffer other censure or penalty,
Receiving Party may disclose such information to such tribunal without liability
hereunder; provided, however, that Receiving Party shall give Disclosing Party
notice of the information to be so disclosed in a commercially reasonable manner
so that Disclosing Party will have an opportunity to obtain an order or other
reliable assurance that confidential treatment will be accorded to such portion
of the information required to be disclosed as Disclosing Party designates.


                                      -2-
<PAGE>   3

February 17, 1998
Page 3


         Siebe hereby acknowledges that the Evaluation Material is being
furnished to Siebe in consideration of Siebe's agreement that, for a period of
eighteen months from the date hereof: (i) Siebe will not make any public
announcement with respect to, or submit any proposal for, a transaction between
Wonderware or any of its security holders and Siebe or any of its affiliates
(other than transactions in the ordinary course of business of the parties)
whether or not any other parties are also involved, directly or indirectly, in
such proposal or transaction, unless such proposal is directed and disclosed
solely to the management of Wonderware or its designated representatives and
Wonderware shall have requested in advance in writing, the submission of each
proposal; and (ii) unless Wonderware shall have consented in advance in writing
Siebe and its successors (whether by merger or otherwise) will not directly or
indirectly, by purchase or otherwise, through its affiliates or otherwise, alone
or with others, acquire, offer to acquire, or agree to acquire, ownership
(including, but not limited to, beneficial ownership as defined in Rule 13d-3
under the Securities Exchange Act of 1934) of any securities or direct or
indirect rights (including convertible securities) or options to acquire such
ownership of any securities of Wonderware or any of its affiliates (or otherwise
act in concert with any person which so owns or acquires, offers to acquire, or
agrees to acquire any such securities, rights or options), or otherwise seek to
influence or control the management or policies of Wonderware or any of its
affiliates.

         Siebe agrees that neither it nor any of its affiliates for a period of
two years from the date hereof, will solicit or otherwise attempt to induce any
executive, manager or key software employee of Wonderware or any affiliate of
Wonderware to leave the employment of Wonderware or its affiliates to accept
employment with Siebe or of any of its affiliates; provided, however, that
neither general advertisements nor use of independent executive search firms
shall constitute an employee solicitation without use of the Evaluation
Material.

         Receiving Party agrees that, except as required by law, Receiving Party
will have no discussion, correspondence, or other contact concerning Disclosing
Party or its securities, or any transaction with or concerning Disclosing Party
or its securities, except with the management of Disclosing Party or except as
otherwise contemplated by this Agreement. Receiving Party further acknowledges
and agrees that Disclosing Party reserves the right, in its sole and absolute
discretion, to reject any or all proposals and to terminate discussions and
negotiations with Receiving Party at any time.

         At any time upon Disclosing Party's request Receiving Party shall
promptly redeliver to Disclosing Party, or destroy, all written material
containing or reflecting any information contained in the Evaluation Material
(whether prepared by Disclosing Party or otherwise, and whether in Receiving
Party's possession or the possession of the Informed Persons) and will not
retain any copies, extracts or other reproductions in whole


                                      -3-
<PAGE>   4
February 17, 1998
Page 4


or in part of such written material. All documents, memoranda, notes and other
writings whatsoever (including all copies, extracts or other reproductions)
prepared by Receiving Party based on the information contained in the Evaluation
Material shall be destroyed, and such destruction shall be certified in writing
to Disclosing Party by an authorized officer who supervised such destruction.
The redelivery of such material shall not relieve Receiving Party's obligation
of confidentiality or other obligations hereunder.

         Although Disclosing Party has endeavored to include in the Evaluation
Material information known to Disclosing Party which Disclosing Party believes
to be relevant for the purpose of Receiving Party's investigation, Receiving
Party understands that Disclosing Party does not make any representation or
warranty as to the accuracy or completeness of the Evaluation Material except as
may be set forth in a definitive Purchase Agreement.

         It is further understood and agreed that no failure or delay by
Disclosing Party in exercising any right, power or privilege hereunder shall
operate as a waiver thereof nor shall any single or partial exercise thereof
preclude any other or further exercise of any right, power or privilege.

         It is further understood and agreed that money damages would not be a
sufficient remedy for any breach of this Agreement by Receiving Party and that
Disclosing Party shall be entitled to seek specific performance and injunctive
or other equitable relief as a remedy for any such breach, and Receiving Party
further agrees to waive any requirement for the securing or posting of any bond
in connection with such remedy. Such remedy shall not be deemed to be the
exclusive remedy for Receiving Party's breach of this Agreement, but shall be in
addition to all other remedies available at law or equity to Disclosing Party.

         This Agreement shall be governed by and construed in accordance with
the internal laws of the State of California without giving effect to the
principles of conflict of laws thereof.

         If either party hereto incurs legal fees, whether or not an action is
instituted, to enforce the terms of this Agreement or to recover damages or
injunctive relief for breach of this Agreement, it is agreed that the successful
or prevailing party shall be entitled to reasonable attorneys' fees, expert
witness fees and other costs in addition to any other relief to which it may be
entitled.

         This Agreement shall terminate two years after the date of this
Agreement. All evaluation material not theretofore redelivered to Disclosing
Party shall be redelivered to Disclosing Party or destroyed in accordance with
the provisions of this Agreement upon


                                      -4-
<PAGE>   5
February 17, 1998
Page 5


termination. The obligation to redeliver all evaluation material shall survive
termination of this Agreement.

         If Receiving Party is in agreement with the foregoing, please so
indicate by signing and returning one copy of this Agreement, whereupon it will
constitute the agreement between Receiving Party and Disclosing Party with
respect to the subject matter hereof.

Very truly yours,                                 CONFIRMED AND AGREED TO:

Wonderware Corporation                            Siebe PLC

  /s/ Sam Auriemma                                 /s/ George Sarney
- --------------------------------------            ------------------------------
By: Sam Auriemma                                  By: __________________________
Its: Vice President, Chief Financial Officer      Its:__________________________




                                      -5-

<PAGE>   1
                                                                  CONFORMED COPY




                                    AGREEMENT




                           DATED 29th November, 1995-




                                US$1,500,000,000


                            REVOLVING CREDIT FACILITY



                                       FOR



                                    SIEBE plc


                                   ARRANGED BY


                              BANKERS TRUST COMPANY


                         NATWEST CAPITAL MARKETS LIMITED


                                       AND


                                   SBC WARBURG





                                  ALLEN & OVERY
                                     London



<PAGE>   2



                                      INDEX

<TABLE>
<CAPTION>
CLAUSE                                                                                                           PAGE
- ------                                                                                                           ----
<S>                                                                                                              <C>
1. INTERPRETATION.................................................................................................2
2. THE FACILITY..................................................................................................14
3 PURPOSE........................................................................................................14
4. CONDITIONS PRECEDENT..........................................................................................15
5. DRAWDOWN......................................................................................................16
6. REPAYMENT.....................................................................................................18
7. PREPAYMENT AND CANCELLATION...................................................................................18
8. INTEREST......................................................................................................20
9. OPTIONAL CURRENCIES...........................................................................................21
10. PAYMENTS.....................................................................................................24
11. TAXES........................................................................................................26
17. UNDERTAKINGS.................................................................................................39
18. DEFAULT......................................................................................................52
19. THE AGENT AND THE ARRANGERS..................................................................................56
26. CHANGES TO THE PARTIES.......................................................................................66
27. DISCLOSURE OF INFORMATION....................................................................................70
28. SET-OFF......................................................................................................71
29. PRO RATA SHARING.............................................................................................71
30. SEVERABILITY.................................................................................................73
31. COUNTERPARTS.................................................................................................73
32. NOTICES......................................................................................................73
33. LANGUAGE.....................................................................................................74
34. JURISDICTION.................................................................................................74
35. GOVERNING LAW................................................................................................76
</TABLE>



<PAGE>   3


SCHEDULES

<TABLE>
<S>                                                                              <C>
1    Banks and Commitments.....................................................
2    Condtions Precedent Documents.............................................
Part I -- To be delivered before the first Loan................................
Part II -- To be delivered by an Additional Borrower...........................
3    Calculation of the MA Cost................................................
4    Form of Request...........................................................
5    Form of accession documents...............................................
Part I -- Form of Novation Certificate.........................................
Part II -- Borrower Accession Agreement........................................
Part III -- Borrower Cessation Notice..........................................
6    Timetable.................................................................
7    Facility Offices..........................................................
Signatories....................................................................
</TABLE>




<PAGE>   4

THIS AGREEMENT is dated 29th November, 1995 between:

(1)      SIEBE plc (incorporated in England and Wales, registered no.  166023) 
         (the "COMPANY");

(2)      SIEBE INC.  (incorporated in the State of Delaware, U.S.A.) and 
         DEUTSCHE SIEBE GmbH (incorporated in Germany) as original borrowers
         (the "ORIGINAL BORROWERS");

(3)      BANKERS TRUST COMPANY, NATWEST CAPITAL MARKETS LIMITED
         and SBC WARBURG, a division of SWISS BANK CORPORATION, as arrangers
         (in this capacity the "ARRANGERS");

(4)      THE FINANCIAL INSTITUTIONS listed in Schedule 1 as banks (the "BANKS");
         and

(5)      SWISS BANK CORPORATION as agent (in this capacity the "AGENT").

IT IS AGREED as follows:

1.       INTERPRETATION

1.1      DEFINITIONS

         In this Agreement:

         "ADDITIONAL BORROWER"

         means a member of the Group which becomes a Borrower in accordance with
         Clause 26.4 (Additional Borrowers).

         "AFFILIATE"

         means a Subsidiary or a Holding Company (as defined in Section 736 of
         the Companies Act 1985) of a person and any other Subsidiary of that
         Holding Company.

         "AGENT'S SPOT RATE OF EXCHANGE"

         means the Agent's spot rate of exchange for the purchase of the
         relevant Optional Currency in the London foreign exchange market with
         Dollars at or about 11.00 a.m. on a particular day.



                                      - 2 -

<PAGE>   5
         "BALANCE SHEET"

         means, at any time, the latest published audited consolidated balance
         sheet of the Group.

         "BORROWER"

         means any of the Company, an Original Borrower or an Additional
         Borrower (and "BORROWERS" shall mean all of them).

         "BORROWER ACCESSION AGREEMENT"

         means a letter substantially in the form of Part 11 of Schedule 5 with
         such amendments as the Agent may approve or reasonably require.

         "BORROWER CESSATION NOTICE"

         means a notice substantially in the form set out in Part III of
         Schedule 5 with such amendments as the Agent may approve or reasonably
         require.

         "BORROWINGS"

         means:

         (a)      all items which are of a type which would be accounted for as
                  borrowings in accordance with the accounting principles
                  applied in connection with the Original Group Accounts; and

         (b)      (without double counting) all guarantees, indemnities or other
                  forms of assurance against financial loss in respect of any
                  such item in paragraph (a) above of any person.

         "BUSINESS DAY"

         means a day (other than a Saturday or a Sunday) on which banks are open
         for business in London and New York City and (in relation to a
         transaction involving ECUs) Paris and Brussels and (in relation to a
         transaction involving any other Optional Currency) the principal
         financial centre of the country of that Optional Currency.

         "CANADIAN DOLLARS"

         means the lawful currency for the time being of Canada.


                                      - 3 -

<PAGE>   6

         "COMMITMENT"

         means, subject to Clause 26.2 (Transfers by Banks), the amount in
         Dollars set opposite the name of a Bank in Schedule 1, to the extent
         not cancelled, transferred or reduced under this Agreement.

         "DEFAULT"

         means an Event of Default or an event which, with the giving of notice
         and/or expiry of any grace period, would constitute an Event of
         Default.

         "DEUTSCHMARKS"

         means the lawful currency for the time being of Germany.

         "DOLLARS" OR "US$"

         means the lawful currency for the time being of the United States of
         America.

         "DOUBLE TAXATION TREATY"

         means any convention between a government of the jurisdiction of
         incorporation of a Borrower and any other government for the avoidance
         of double taxation and the prevention of fiscal evasion with respect to
         taxes on income and capital gains.

         "DRAWDOWN DATE"

         means the date of the advance of a Loan.

         "ECU"

         means the European Currency Unit used in the European Monetary System.

         "EVENT OF DEFAULT"

         means an event specified as such in Clause 18.1 (Events of Default).

         "EXISTING FACILITIES"

         means:

         (a)      the Company's syndicated revolving credit facility dated 25th
                  July, 1994 arranged by NatWest Capital Markets Limited and
                  S.G. Warburg & Co. Ltd; and


                                      - 4 -

<PAGE>   7

         (b)      Siebe Inc.'s secured facility dated 27th July, 1990 arranged
                  by Bankers Trust Company.

         "FACILITY"

         means the facility referred to in Clause 2.1 (Facility).

         "FACILITY OFFICE"

         means, in relation to a Bank, the office(s) notified by a Bank to the
         Agent:

         (a)      on or before the date it becomes a Bank; or

         (b)      by not less than 5 Business Days' notice,

         as the office(s) through which it will perform all or any of its
         obligations under this Agreement being, at the date of this Agreement,
         the addresses set out in Schedule 7.

         "FEE LETTERS"

         means the letters dated the date of this Agreement between the Company
         and, respectively, the Agent and the Arrangers setting out the amount
         of various fees referred to in Clause 20 (Fees).

         "FINAL REPAYMENT DATE"

         means the fifth anniversary of the date of this Agreement.

         "FINANCE DOCUMENT"

         means this Agreement, the Fee Letters, a Novation Certificate or any
         other document designated in writing as such by the Agent and the
         Company.

         "FINANCE PARTY"

         means an Arranger, a Bank or the Agent.

         "FINANCIAL INDEBTEDNESS"

         means any indebtedness in respect of:

         (a)      moneys borrowed and debit balances at banks; or

         (b)      any debenture, bond, note, loan stock or other security (other
                  than equity which is not a mechanism for borrowing): or


                                      - 5 -

<PAGE>   8

         (c)      any acceptance or documentary credit, except for any such
                  credit opened in the ordinary course of trade the term of
                  which is 180 days or less; or

         (d)      recourse in respect of receivables sold or discounted in the
                  event that these receivables cannot be collected; or

         (e)      the acquisition cost of any asset (other than any asset
                  obtained on normal commercial terms in the ordinary course of
                  trading) to the extent payable before or after the time of
                  acquisition or possession by the party liable where the
                  advance or deferred payment is arranged primarily as a method
                  of raising finance or financing the acquisition of that asset;
                  or

         (f)      leases (whether in respect of land, machinery, equipment or
                  otherwise) entered into primarily as a method of raising
                  finance or financing the acquisition of the asset leased; or

         (g)      currency or interest swap, cap or collar arrangements; or

         (h)      any guarantee or indemnity given in respect of indebtedness of
                  a type referred to in sub-paragraphs (a) to (g) above,

         "FRENCH FRANCS"

         means the lawful currency for the time being of France.

         "GROUP"

         means the Company and its Subsidiaries.

         "LOAN"

         means a loan made by the Banks under the Facility or the principal
         amount outstanding of that loan.

         "LIBOR"

         means, in relation to a Loan:

         (a)      the arithmetic mean (rounded upward to the nearest four
                  decimal places) of the offered quotations for deposits in the
                  currency of that Loan for a period comparable to its Term
                  which appear on the relevant Page (if any) of the Reuters
                  Screen at or about 11.00 a.m. on the applicable Rate Fixing
                  Date; or


                                      - 6 -

<PAGE>   9

         (b)      if one only or no such offered quotation appears on the
                  relevant Page of the Reuters Screen or there is no relevant
                  Page, the rate per annum of the offered quotation for deposits
                  in the currency of that Loan for a period comparable to its
                  Term which appears on Telerate Page 3750 or Telerate Page 3740
                  (as appropriate) at or about 12.00 noon (showing the rate as
                  at 11.00 am.) on the applicable Rate Fixing Date; or

         (c)      if one only or no such offered quotation appears on the
                  relevant Page of the Reuters Screen or there is no relevant
                  Page and no such offered quotation appears on the relevant
                  Telerate Page by 12 noon, the arithmetic mean (rounded upward
                  to the nearest four decimal places) of the rates, as supplied
                  to the Agent at its request, quoted by each Reference Bank to
                  leading banks in the London interbank market at or about 11.00
                  a.m. on the applicable Rate Fixing Date for the offering of
                  deposits in the currency of that Loan for a period equal or
                  comparable to its Term.

         For the purposes of this definition, "TELERATE PAGE 3750" or "TELERATE
         PAGE 3740" means the display designated as "Page 3750" or "Page 3740"
         on the Telerate Service (or such other page as may replace Page 3750 or
         Page 3740 on that service) or such other service as may be nominated by
         the British Bankers' Association as the information vendor for the
         purpose of displaying British Bankers' Association Interest Settlement
         Rates.

         "MAJORITY BANKS"

         means, at any time, Banks whose Commitments:

         (a)      then aggregate more than 67 per cent. of the Total
                  Commitments; or

         (b)      if the Total Commitments have been reduced to zero, aggregated
                  more than 67 per cent. of the Total Commitments immediately
                  before the reduction.

         "MARGIN"

         means 0.2 per cent.  per annum.

         "MATERIAL SUBSIDIARY"

         means, at any time:

         (a)      a Borrower; or

         (b)      a Subsidiary of the Company the gross assets or profit before
                  tax and exceptional items and extraordinary items (in both
                  cases, shown as such in 

                                      - 7 -

<PAGE>   10

                  its most recently audited accounts) of which (consolidated in
                  the case of a Subsidiary which itself has Subsidiaries) amount
                  to 5 per cent. or more of the consolidated gross assets or
                  profits before tax and exceptional items and extraordinary
                  items (shown as such in the Balance Sheet or the Profit and
                  Loss Account) of the Group (all as calculated by reference to
                  the latest audited consolidated accounts of the Group); or

         (c)      a Subsidiary of the Company to which has been transferred
                  (whether by one transaction or a series of transactions,
                  related or not) the whole or substantially the whole of the
                  assets of a Subsidiary which immediately prior to such
                  transactions was a Material Subsidiary.

         For the purposes of this definition:

         (i)      if a Subsidiary of the Borrower becomes a Material Subsidiary
                  under paragraph (c) above, then the Material Subsidiary from
                  which the relevant transfer was made shall, subject to
                  paragraph (b) above, cease to be a Material Subsidiary; and

         (ii)     if a Subsidiary is acquired by the Company after the end of
                  the financial period to which the latest audited consolidated
                  accounts relate, those accounts shall be adjusted as if that
                  Subsidiary had been shown in them by reference to its then
                  latest audited accounts (consolidated if appropriate) until
                  consolidated accounts of the Group for the financial period in
                  which the acquisition is made have been prepared and audited.

         "MLA COST"

         means the cost imputed to the Banks of compliance with the mandatory
         liquid assets requirements of the Bank of England during the Term of a
         Loan denominated in Sterling, determined in accordance with Schedule 3.

         "NOVATION CERTIFICATE"

         has the meaning given to it in Clause 26.3 (Procedure for novations).

         "OPTIONAL CURRENCY"

         means Sterling, Canadian Dollars, French Francs, Yen, Deutschmarks,
         Swiss Francs or ECUs or any other currency (other than Dollars) which
         the Agent certifies is readily available and freely transferable in the
         London interbank market.

                                     - 8 -

<PAGE>   11

         "ORIGINAL DOLLAR AMOUNT"

         means:

         (a)      the principal amount of a Loan denominated in Dollars; or

         (b)      the principal amount of a Loan denominated in an Optional
                  Currency, translated into Dollars on the basis of the Agent's
                  Spot Rate of Exchange on the date of receipt by the Agent of
                  the Request for that Loan.

         "ORIGINAL GROUP ACCOUNTS"

         means the audited consolidated accounts of the Group for the year ended
         1st April, 1995.

         "PARTICIPATION DATE"

         means:

         (a)      in relation to a Bank which is an original Party, the date of
                  this Agreement; and

         (b)      in relation to any other Bank, the date on which it becomes a
                  Party.

         "PARTY"

         means a party to this Agreement.

         "PRESCRIBED TIME"

         means the time set opposite the number of a sub-Clause or paragraph
         under the heading "TIME" in Schedule 6.

         "PROFIT AND LOSS ACCOUNT"

         means, at any time, the latest published audited consolidated profit
         and loss account of the Group.

         "QUALIFYING LENDER"

         means a bank or financial institution which either:

         (a)      for a Loan to a Borrower incorporated in the U.K.


                                     - 9 -
<PAGE>   12

                  (i)      is recognised by the Inland Revenue as a bank
                           carrying on a bona fide banking business in the U.K.
                           for the purpose of Section 349 of the Income and
                           Corporation Taxes Act 1988 and takes any interest
                           received by it under this Agreement into account as a
                           trading receipt of such a business; or

                  (ii)     is a Treaty Bank; or

         (b)      for a Loan to a U.S.  Borrower:

                  (i)      is either not a foreign person for U.S. federal
                           income tax purposes or payments of principal,
                           interest, fees and other amounts under the Finance
                           Documents are effectively connected with the conduct
                           of a trade or business in the United States of
                           America; or

                  (ii)     is a Treaty Bank.

         "RATE FIXING DATE"

         means:

         (a)      the Drawdown Date for a Loan denominated in Sterling; or

         (b)      the second Business Day before the Drawdown Date for a Loan
                  denominated in Dollars or an Optional Currency other than
                  Sterling.

         "REFERENCE BANKS"

         means, subject to Clause 26.5 (Reference Banks), the principal London
         offices of National Westminster Bank Plc, Swiss Bank Corporation and
         Bankers Trust Company.

         "REGULATION D COSTS"

         means, in relation to any Loan made to a US Borrower (or deposits
         maintained by a Bank to fund such a Loan), the amount (if any)
         certified by a Bank to be the cost to it of complying with Regulation D
         of the Board of Governors of the United States Federal Reserve System
         (or any similar reserve requirements) in respect of that Loan or those
         deposits.

         "REPAYMENT DATE"

         means the last day of the Term of a Loan.


                                     - 10 -
<PAGE>   13

         "REQUEST"

         means a request made by a Borrower for a Loan, substantially in the
         form of Schedule 4.

         "ROLLOVER LOAN"

         means a Loan which:

         (a)      is being borrowed solely to refinance an outstanding Loan; and

         (b)      is in the same currency as and is in an amount equal to or
                  less than that outstanding Loan.

         "SECURITY INTEREST"

         means any mortgage, pledge, lien, charge, assignment operating by way
         of security, hypothecation or security interest, or, in relation to a
         jurisdiction other than England and Wales, any other equivalent or
         analogous agreement or arrangement having the effect of conferring
         security, but excludes, for the avoidance of doubt, set off rights
         enjoyed by or against any bank or financial institution which do not
         amount to a cash management scheme.

         "STERLING" OR "(POUND)"

         means the lawful currency for the time being of the U.K.

         "SUBSIDIARY"

         means a subsidiary within the meaning of Section 736 of the Companies
         Act 1985, as amended by Section 144 of the Companies Act 1989. "Swiss
         Francs" means the lawful currency for the time being of Switzerland.

         "SWISS FRANCS"

         means the lawful currency for the time being of Switzerland.

         "TERM"

         means, in relation to a Loan, the period for which the Loan is
         borrowed, as selected by a Borrower in the Request relevant to that
         Loan.


                                     - 11 -
<PAGE>   14

         "TOTAL COMMITMENTS"

         means the aggregate for the time being of the Commitments being
         US$1,500,000,000 at the date of this Agreement

         "TREATY BANK"

         means a bank or financial institution which is entitled at its
         Participation Date to the benefit of a provision in a Double Taxation
         Treaty giving exemption from withholding or deduction in respect of
         taxation on interest by a Borrower and which does not carry on business
         in the jurisdiction of incorporation of that Borrower through a
         permanent establishment with which the indebtedness under the Finance
         Documents in respect of which the interest is paid is effectively
         connected.

         "U.K."

         means the United Kingdom of Great Britain and Northern Ireland.

         "US BORROWER"

         means Siebe Inc. or a Borrower that is incorporated or organised under
         the laws of any of the United States of America or the District of
         Columbia.

         "U.S.  FACILITY"

         means the US$150,000,000 11.22% Senior Secured Notes due 2001 issued by
         Siebe Inc.

         YEN"

         means the lawful currency for the time being of Japan.

1.2      CONSTRUCTION

(a)      In this Agreement, unless the contrary intention appears, a reference 
         to:

         (i)      "ASSETS" includes properties, revenues and rights of every
                  description;

                  an "AUTHORISATION" includes an authorisation, consent,
                  approval, resolution, licence, exemption, filing, registration
                  and notarisation;

                  a "MONTH" is a reference to a period starting on one day in a
                  calendar month and ending on the numerically corresponding day
                  in the next calendar month, except that:


                                     - 12 -
<PAGE>   15

                  (A)      if there is no numerically corresponding day in the
                           month in which that period ends, that period shall
                           end on the last Business Day in that calendar month;
                           and

                  (B)      if a Term for a Loan commences on the last Business
                           Day of a calendar month, that Term shall end on the
                           last Business Day in the month in which it is to end;

                  a "REGULATION" includes any regulation, rule, official
                  directive, request or guideline (whether or not having the
                  force of law, but if not having the force of law, only if
                  compliance with the regulation is in accordance with
                  the general practice of persons to whom the regulation is
                  intended to apply) of any governmental body, agency,
                  department or regulatory, self-regulating or other authority
                  or organisation;

                  (ii)     a provision of a law is a reference to that provision
                           as amended or re-enacted;

                  (iii)    a Clause or a Schedule is a reference to a clause of
                           or a schedule to this Agreement;

                  (iv)     a person includes its successors and assigns;

                  (v)      a Finance Document or another document (other than
                           the U.S. Facility) is a reference to that Finance
                           Document or that other document as amended, novated
                           or supplemented;

                  (vi)     a time of day is a reference to London time; and

                  (vii)    a Bank is a reference to a Bank and any of its
                           successors and permitted assigns and any other bank
                           or financial institution which becomes a Bank whether
                           by way of Novation Certificate or otherwise.

         (b)      NatWest Capital Markets Limited in its capacity as an Arranger
                  is a Party as agent for National Westminster Bank Plc a member
                  of IMRO. All references to NatWest Capital Markets Limited as
                  an Arranger include National Westminster Bank Plc unless the
                  context otherwise requires. This paragraph does not affect the
                  rights or obligations of National Westminster Bank Plc under
                  this Agreement.

         (c)      Unless the contrary intention appears, a term used in any
                  other Finance Document or in any notice given under or in
                  connection with any Finance 


                                     - 13 -
<PAGE>   16

                  Document has the same meaning in that Finance Document or
                  notice as in this Agreement.

         (d)      The index to and the headings in this Agreement are for
                  convenience only and are to be ignored in construing this
                  Agreement.

2.       THE FACILITY

2.1      FACILITY

         Subject to the terms of this Agreement, the Banks grant to the
         Borrowers a commited revolving multicurrency advance facility under
         which the Banks shall, when requested by a Borrower, make to that
         Borrower Loans up to an aggregate Original Dollar Amount not exceeding,
         at any time, the Total Commitments at that time. No Bank is obliged to
         lend more than its Commitment.

2.2      NUMBER OF REQUESTS AND DRAWDOWNS

         No more than one Loan with a Term of 7 days and no more than 30 other
         Loans may be outstanding at any time. Subject to the above, up to 10
         Requests may be delivered on the same day and up to 10 Loans may be
         requested with the same Drawdown Date, whether or not the currencies
         and Terms requested are similar.

2.3      NATURE OF A FINANCE PARTY'S RIGHTS AND OBLIGATIONS

(a)      The obligations of a Finance Party under the Finance Documents are
         several. Failure of a Finance Party to carry out those obligations does
         not relieve any other Party of its obligations under the Finance
         Documents. No Finance Party is responsible for the obligations of any
         other Finance Party under the Finance Documents.

(b)      The rights of a Finance Party under the Finance Documents are divided
         rights. A Finance Party may, except as otherwise stated in the Finance
         Documents, separately enforce those rights.

3        PURPOSE

(a)      Each Borrower shall apply each Loan towards its general corporate
         purposes, including refinancing the Existing Facilities.

(b)      Without affecting the obligations of any Borrower in any way, no
         Finance Party is bound to monitor or verify the application of any
         Loan.


                                     - 14 -
<PAGE>   17

4.       CONDITIONS PRECEDENT

4.1      DOCUMENTARY CONDITIONS PRECEDENT

         The obligations of each Finance Party to a Borrower under this
         Agreement are subject to the condition precedent that the Agent has
         notified the Company and the Banks that it has received all of the
         documents set out in Part I of Schedule 2 relevant to that Borrower and
         the Company in form and substance satisfactory to the Agent. The Agent
         shall use all reasonable endeavours to give that notification promptly
         after receiving all of those documents.

4.2      CONDITION PRECEDENT TO THE FIRST LOAN

         The obligations of each Bank to participate in the first Loan are
         subject to the further condition precedent that the Agent has notified
         the Banks that it has received confirmation from the Company that the
         proceeds of the first Loan will be utilised in repaying or prepaying
         the Existng Facilities in whole and that all commitments under the
         Existing Facilities have been, or will be, cancelled in full on or
         before the first Drawdown Date.

4.3      FURTHER CONDITIONS PRECEDENT

         The obligations of each Bank to participate in a Loan are subject to
         the further conditions precedent that on both the date of the Request
         and the Drawdown Date for that Loan:

         (a)      the representations and warranties in Clause 16
                  (Representations and warranties) to be repeated on those dates
                  in accordance with Clause 16.14 (Times for making
                  representations and warranties) are correct (other than those
                  which have been expressly waived in accordance with this
                  Agreement) and will be correct immediately after the Loan is
                  made;

         (b)      (in the case of any Loan other than a Rollover Loan) no
                  Default is outstanding or will result from the making of the
                  Loan (which has not been waived in accordance with this
                  Agreement); and

         (c)      the borrowing of the Loan will not cause the aggregate of:

                  (i)      the Original Dollar Amount of all outstanding Loans
                           (but, for the purpose of this sub-paragraph (c) only,
                           disregarding any outstanding Loan which falls to be
                           repaid on or before, and including any Loan which is
                           scheduled to be made prior to or on, the Drawdown
                           Date of that Loan); and


                                     - 15 -
<PAGE>   18

                  (ii)     the Original Dollar Amount of that Loan,

                  to exceed the Total Commitments at that time.

         if an Event of Default is outstanding (which has not been waived in
         accordance with this Agreement) or will result from the making of a
         rollover Loan, the Borrower must not select a Term of more than one
         month.

5.       DRAWDOWN

5.1      RECEIPT OF REQUESTS

         A Borrower may utilise the Facility if the Agent receives, not later
         than the Prescribed Time, a duly completed Request.

5.2      COMPLETION OF REQUESTS

         A Request will not be regarded as having been duly completed unless:

         (a)      the Drawdown Date is a Business Day;

         (b)      only one currency is specified and the principal amount of the
                  Loan is for an amount equal to the aggregate of the then
                  undrawn Commitments or, if less, is:

                  (i)      if the currency is Dollars, a minimum of US$5,000,000
                           and an integral multiple of US$ 1,000,000; or

                  (ii)     if the currency is Sterling, a minimum of
                           (pound)5,000,000 and an integral multiple of
                           (pound)1,000,000; or

                  (iii)    if the currency is an Optional Currency other than
                           Sterling, a minimum and integral multiple of the
                           amounts agreed between the relevant Borrower and the
                           Agent before the delivery of that Request or failing
                           agreement, the equivalent in the Optional Currency of
                           a minimum amount of US$2,000,000 and an integral
                           multiple of US$1,000,000 calculated at the Agent's
                           Spot Rate of Exchange at the Prescribed Time referred
                           to in Clause 5.1 (Receipt of Requests) rounded on
                           such basis as may be reasonably determined by the
                           Agent and notified to that Borrower; or

                  (iv)     such other amount as the Agent and the relevant
                           Borrower may agree;


                                     - 16 -
<PAGE>   19

         (c)      only one Term is specified which:

                  (i)      does not overrun the Final Repayment Date; and

                  (ii)     is a period of an approved duration or of an optional
                           duration;

                  and

         (d)      the payment instructions comply with Clause 10 (Payments).

         In this Agreement:

         "APPROVED DURATION" means a period of 7 days or 1, 2, 3 or 6 months;
         and

         "OPTIONAL DURATION" means a period of 12 months or such other period as
         the Borrower and the Banks may agree,

5.3      AMOUNT OF EACH BANK'S PARTICIPATION IN THE LOAN

         The amount of a Bank's participation in the Loan will be the proportion
         of the Loan which its Commitment bears to the Total Commitments on the
         date of receipt of the relevant Request.

5.4      NOTIFICATION OF THE BANKS

         The Agent shall, not later than the Prescribed Time, notify each Bank
         of the details of the requested Loan and the amount of its
         participation in the Loan.

5.5      SELECTION OF AN OPTIONAL DURATION

(a)      If a Borrower selects a Term of an optional duration, it may also
         select in the relevant Request a Term of an approved duration to apply
         if the selection of a Term of in optional duration becomes ineffective
         in accordance with paragraph (b) below.

(b)      If:

         (i)      a Borrower requests a Term of an optional duration; and

         (ii)     the Agent receives notice from a Bank not later than the
                  Prescribed Time that it does not agree to the request,

         the Term for the proposed Loan shall be of the alternative approved
         duration specified in the relevant Request or, in the absence of any
         alternative selection, 6 months.


                                     - 17 -
<PAGE>   20

(c)      If the Agent receives a notice from a Bank under paragraph (b) above,
         it shall notify the relevant Borrower and the Banks of the new Term for
         the proposed Loan by not later than the Prescribed Time.

5.6      PAYMENT OF PROCEEDS

         Subject to the terms of this Agreement, each Bank shall make its
         participation in the Loan available to the Agent for the relevant
         Borrower on the relevant Drawdown Date.

6.       REPAYMENT

         Each Borrower shall repay each Loan made to it in full on its Repayment
         Date to the Agent for the Banks. Amounts repaid may, in accordance with
         the terms of this Agreement, be reborrowed.

7.       PREPAYMENT AND CANCELLATION

7.1      AUTOMATIC CANCELLATION OF THE TOTAL COMMITMENTS

         The Commitment of each Bank shall be automatically cancelled at close
         of business on the Final Repayment Date.

7.2      VOLUNTARY CANCELLATION

         The Company may, by giving not less than 14 days' prior notice to the
         Agent, cancel the unutilised portion of the Total Commitments in whole
         or in part (but, if in part, in minimum amounts of US$20,000,000 and
         integral multiples of US$10,000,000 thereafter) without premium or
         penalty. Any cancellation in part shall be applied against the
         Commitment of each Bank pro rata.

7.3      VOLUNTARY PREPAYMENT

         A Borrower may, by giving not less than 14 days' prior notice to the
         Agent, prepay any Loan, or any part of it which is of a minimum amount
         or a higher integral multiple of the amounts in the relevant currency
         specified in Clause 5.2(b) (Completion of Requests).

7.4      MANDATORY PREPAYMENT

         If any single person, or group of persons acting in concert (as defined
         in the City Code on Take-Overs and Mergers), acquires control (as
         defined in Section 416 of the Income and Corporation Taxes Act 1988) of
         the Company, the Company shall notify the Agent promptly after becoming
         aware of the relevant event. The Agent


                                     - 18 -
<PAGE>   21
         (on behalf of and after consultation with the Banks) shall negotiate
         with the Company with a view to agreeing terms and conditions
         acceptable to the Banks for continuing the Facility. Any terms and
         conditions agreed in writing by the Agent (on behalf of and with the
         consent of all the Banks) and the Company within 30 days of the
         occurrence of the event in question shall take effect in accordance
         with its terms. If no such agreement is reached within that 30 day
         period, then, if so instructed by the Majority Banks at any time
         thereafter, the Agent shall by notice to the Company:

         (a)      cancel the Total Commitments; and/or

         (b)      demand that all or part of the Loans, together with accrued
                  interest and all other amounts accrued under this Agreement be
                  immediately due and payable, whereupon they shall become
                  immediately due and payable.

7.5      ADDITIONAL RIGHT OF PREPAYMENT AND CANCELLATION

         If any Borrower is required to pay any amount to a Bank under Clause 11
         (Taxes) or Clause 13 (Increased Costs), the Company may, whilst the
         circumstances giving rise to the requirement continue, serve a notice
         of prepayment and cancellation on that Bank through the Agent. In that
         event:

         (a)      each Borrower shall prepay that Bank's participation in all
                  the Loans made to that Borrower on the date falling 5 Business
                  Days after the date of service of the notice together with all
                  other amounts payable by it to that Bank under this Agreement;
                  and

         (b)      the Bank's Commitment shall be cancelled on the date of
                  service of the notice.

7.6      MITIGATION

         If any circumstances arise which result, or would on the giving of
         notice (or the like) result, in a Borrower having to make a payment to
         or for the account of a Bank under Clause 11 (Taxes), 13 (Increased
         costs) or 14 (Illegality), then, without in any way limiting, reducing
         or otherwise qualifying any of the obligations of any Borrower under
         those Clauses, the Bank shall promptly notify that Borrower and
         negotiate in good faith and shall take such steps as are reasonably
         open to it and as are acceptable to that Borrower to mitigate or remove
         those circumstances, including (without limitation) change of its
         Facility Office, restructuring of its participation in the Facility or
         the transfer of its obligations to an Affiliate or other person
         acceptable to that Borrower. Nothing in this Clause requires a Bank to
         take any action which, in its sole opinion, might be in any way
         prejudicial to it or


                                     - 19 -
<PAGE>   22

         conflict with its banking policies or to disclose any information
         regarding its or its Affiliates' tax affairs.

7.7      MISCELLANEOUS PROVISIONS

(a)      Any notice of prepayment and/or cancellation under this Agreement is
         irrevocable. The Agent shall notify the Banks promptly of receipt of
         any such notice.

(b)      All prepayments under this Agreement shall be made together with
         accrued interest on the amount prepaid.

(c)      No prepayment or cancellation is permitted except in accordance with
         the express terms of this Agreement.

(d)      Without prejudice to the right of a Borrower, subject to the term of
         this Agreement, to re-borrow Loans repaid in accordance with Clause 6
         (Repayment) or prepaid in accordance with Clause 7.3 (Voluntary
         prepayment), no amounts prepaid under this Agreement (other than
         pursuant to Clause 7.3 (Voluntary prepayment)) may be reborrowed. No
         amount of the Total Commitments cancelled under this Agreement may
         subsequently be reinstated.

8.       INTEREST

8.1      INTEREST RATE

         The rate of interest on each Loan for its Term is the rate per annum
         determined by the Agent to be the aggregate of the applicable:

         (a)      Margin;

         (b)      LIBOR; and

         (c) in the case of Loans denominated in Sterling, MLA Cost.

8.2      DUE DATES

         Except as otherwise provided in this Agreement, accrued interest on
         each Loan is payable by the relevant Borrower on its Repayment Date and
         also, in the case of a Loan with a Term longer than 6 months, on the
         dates falling at 6 monthly intervals after its Drawdown Date.

8.3      DEFAULT INTEREST

(a)      If a Borrower fails to pay any amount payable by it under this
         Agreement, it shall forthwith on demand by the Agent pay interest on
         the overdue amount from the 


                                     - 20 -
<PAGE>   23

         due date up to the date of actual payment, as well after as before
         judgment, at a rate (the "DEFAULT RATE") determined by the Agent to be
         1 per cent. per annum above the rate which would have been payable if
         the overdue amount had, during the period of non-payment, constituted a
         Loan in the currency of the overdue amount for such successive Terms of
         such duration as the Agent may determine (each a "DESIGNATED TERM").

(b)      The default rate will be determined on each Business Day or the first
         day of, or two Business Days before the first day of, the relevant
         Designated Term, as appropriate.

(c)      If the Agent determines that deposits in the currency of the overdue
         amount are not at the relevant time being made available by the
         Reference Banks to leading banks in the London interbank market, the
         default rate will be determined by reference to the cost of funds to
         the Agent from whatever sources it reasonably selects.

(d)      Default interest will be compounded at the end of each Designated
         Term.

8.4      NOTIFICATION OF RATES OF INTEREST

         The Agent shall promptly notify each relevant Party of the
         determination of a rate of interest under this Agreement.

9.       OPTIONAL CURRENCIES

9.1      CHANGE OF CURRENCY

         If, before 9.30 a.m. on the Rate Fixing Date of a Loan to be
         denominated in an Optional Currency, the Agent receives notice from a
         Bank that:

         (a)      it is impracticable for the Bank to fund its participation in 
         the Loan for its Term in that Optional Currency in the ordinary course
         of business in the London interbank market; or

         (b)      the use of the proposed Optional Currency might contravene any
         law or regulation,

         then:

         (i)      the Agent shall promptly and in any event before 10.30 a.m. on
                  that Rate Fixing Date notify the relevant Borrower and the
                  Banks;


                                     - 21 -
<PAGE>   24

         (ii)     if the Agent receives notice from the relevant Borrower
                  specifying the Loan should not be made by 11.00 a.m. on the
                  relevant Rate Fixing Date, the Loan shall not be made;

         (iii)    if the Agent does not receive any notice under sub-paragraph
                  (ii) above, the Loan will be denominated instead in Dollars
                  (unless the Agent receives notice under sub-paragraph (iv)
                  below) in an amount equal to its Original Dollar Amount, and
                  there shall be substituted in the definition of "LIBOR"
                  (insofar as it applies to that Loan in Dollars) in Clause 1.1
                  (Definitions) the times "l.00 p.m." and "2.00 p.m." for,
                  respectively, the times "11.00 a.m." and "12.00 noon"; and

         (iv)     if the Agent receives notice from the relevant Borrower
                  specifying the Loan shall be made in Sterling by 11.00 a.m. on
                  the relevant Rate Fixing Date, the Loan shall be made in
                  Sterling.

9.2      NOTIFICATION OF RATES AND AMOUNTS

         The Agent shall notify each relevant Party of any applicable Agent's
         Spot Rate of Exchange or Original Dollar Amount promptly after it is
         ascertained.

9.3      ECU

         (a)      If, at any time:-

         (i)      the ECU ceases to be utilised as the basic accounting unit of
                  the European Union;

         (ii)     the ECU ceases to be used in the European Monetary System;

         (iii)    it becomes illegal, impossible or impracticable for payments
                  to be made under this Agreement in ECU; or

         (iv)     the Agent determines that any event mentioned in sub-paragraph
                  (i) to (iii) above is likely to occur before the Final
                  Repayment Date.

         then:-

         (1)      the Agent shall notify the Company and the Banks promptly upon
                  becoming aware of the event;

         (2)      the Banks shall not be obliged to make any Loans denominated
                  in ECU on or after the date of that notification; and

                                     - 22 -
<PAGE>   25

         (3)      subsequently each amount which would otherwise have been
                  payable by the relevant Borrower under this Agreement in ECU
                  shall be paid by that Borrower in Dollars or any component
                  currency of the ECU or any other currency acceptable to all of
                  the Banks (the "REPLACEMENT CURRENCY") and the amount of
                  replacement currency so payable will be determined in
                  accordance with paragraph (b) below.

(b)      (i)      The equivalent in replacement currency of the Loan in ECU for
                  the purposes of paragraph (a) above will be calculated by the
                  Agent as the sum of the equivalent in replacement currency of
                  the components of the ECU;

         (ii)     the components of the ECU for this purpose will be the
                  currency amounts that were components of the ECU when the ECU
                  was most recently used in the European Monetary System, except
                  that, if the ECU is being used for the settlement of
                  transactions by public institutions of or within the European
                  Community, or was so used after its most recent use in the
                  European Monetary System, the components will be:-

                   (1)     the currency amounts that are components of the ECU
                           as so used on the day the calculation of the amount
                           of replacement currency is to be made (the "DAY OF
                           VALUATION"); or

                  (2)      the currency amounts that were components of the ECU
                           when it was most recently so used, as appropriate;

         (iii)    the rates to be used by the Agent for the above purposes will
                  be its rates for the purchase in the London foreign exchange
                  market of replacement currency with each of the components at
                  or about 11.00 a.rn. on the day of valuation for value on the
                  day the relevant payment in replacement currency is due; and

         (iv)     the day of valuation will be the day determined by the Agent
                  for the purposes of calculating the equivalent in replacement
                  currency of any amount in ECU and, unless the Agent considers
                  it inappropriate, will be the day two Business Days before the
                  relevant payment in replacement currency is due.


                                     - 23 -
<PAGE>   26

10.      PAYMENTS

10.1     PLACE

         All payments by a Borrower or a Bank under this Agreement shall be made
         to the Agent or to its account at such office or bank as it may notify
         to that Borrower or Bank for this purpose.

10.2     FUNDS

         Payments under this Agreement to the Agent shall be made for value on
         the due date at such times and in such funds as the Agent may specify
         to the Party concerned as being customary at the time for the
         settlement of transactions in the relevant currency in the place for
         payment.

10.3     DISTRIBUTION

(a)      Each payment received by the Agent under this Agreement for another
         Party shall, subject to paragraphs (b) and (c) below, be made available
         by the Agent to that Party by payment (on the date and in the currency
         and funds of receipt) to its account with such bank in the principal
         financial centre of the country of the relevant currency (or, in the
         case of ECU, a principal financial centre selected by the relevant
         Party in which payments in ECU may be cleared) as it may notify to the
         Agent for this purpose by not less than 1 Business Day's prior notice.

(b)      The Agent shall apply any amount received by it for a Borrower in any
         currency (the "FIRST CURRENCY") in or towards:

         (i)      payment (on the date and in the currency and funds of receipt)
                  of any amount in the first currency due from that Borrower
                  under this Agreement; or

         (ii)     if that Borrower and the Agent so agree, the purchase of any
                  amount of any other currency (the "SECOND CURRENCY") to be
                  applied in payment of any amount in the second currency due
                  from that Borrower under this Agreement; the resultant amount
                  shall be deemed to be the amount received by the Agent after
                  allowing for costs of conversion.

         Nothing in this Clause 10.3(b) shall be effective to create a charge.

(c)      Where a sum is to be paid under this Agreement to the Agent for the
         account of another Party, the Agent is not obliged to pay that sum to
         that Party until it has established that it has actually received that
         sum. The Agent may, however, assume that the sum has been paid to it in
         accordance with this Agreement and, in

                                     - 24 -
<PAGE>   27

         reliance on that assumption, make available to that Party a
         corresponding amount. If the sum has not been made available but the
         Agent has paid a corresponding amount to another Party, that Party
         shall forthwith on demand refund the corresponding amount to the Agent
         together with interest on that amount from the date of payment to the
         date of receipt, calculated at a rate determined by the Agent to
         reflect its cost of funds.

10.4     CURRENCY

(a)      A repayment or prepayment of a Loan is payable in the currency in which
         the Loan is denominated.

(b)      Interest is payable in the currency in which the relevant amount in
         respect of which it is payable is denominated.

(c)      Amounts payable in respect of costs, expenses, taxes and the like are
         payable in the currency in which they are incurred.

(d)      Any other amount payable under this Agreement is, except as otherwise
         provided in this Agreement, payable in Dollars.

10.5     SET-OFF AND COUNTERCLAIM

         All payments made by a Borrower under this Agreernent shall be made
         without set-off or counterclaim.

10.6     NON-BUSINESS DAYS

(a)      If a payment under this Agreement is due on a day which is not a
         Business Day, the due date for that payment shall instead be the next
         Business Day in the same calendar month (if there is one) or the
         preceding Business Day (if there is not).

(b)      During any extension of the due date for payment of any principal under
         this Agreement interest is payable on the principal at the rate payable
         on the original due date.

10.7     PARTIAL PAYMENTS

(a)      If the Agent receives a payment insufficient to discharge all the
         amounts then due and payable by a Borrower under this Agreement, the
         Agent shall apply that payment towards the obligations of that Borrower
         under this Agreement in the following order:


                                     - 25 -
<PAGE>   28

         (i)      FIRST, in or towards payment of any unpaid costs and
                  reasonable expenses of the Agent under this Agreement;

         (ii)     SECONDLY, in or towards payment pro rata of any accrued fees
                  due but unpaid by that Borrower under Clause 20.2 (Commitment
                  fee);

         (iii)    THIRDLY, in or towards payment pro rata of any accrued
                  interest due but unpaid by that Borrower under this Agreement;

         (iv)     FOURTHLY, in or towards payment pro rata of any principal due
                  but unpaid by that Borrower under this Agreement; and

         (v)      FIFTHLY, in or towards payment pro rata of any other sum due
                  but unpaid by that Borrower under this Agreement.

(b)      The Agent shall, if so directed by all the Banks, vary the order set
         out in sub-paragraphs (a)(ii) to (v) above.

(c)      Paragraphs (a) and (b) above shall override any appropriation made by a
         Borrower.

11.      TAXES

11.1     GROSS-UP

         Subject to Clause 11.5 (Exceptions to Gross-up), all payments by a
         Borrower under the Finance Documents shall be made without any
         deductions and free and clear of and without deduction for or on
         account of any taxes, except to the extent that the Borrower is
         required by law to make payment subject to any taxes. Subject to Clause
         11.5 (Exceptions to Gross-up), if any tax or amounts in respect of tax
         must be deducted, or any other deductions must be made, from any
         amounts payable or paid by a Borrower, or paid or payable by the Agent
         to a Bank, under the Finance Documents, the Borrower shall pay such
         additional amounts as may be necessary to ensure that the relevant Bank
         receives a net amount equal to the full amount which it would have
         received had payment not been made subject to tax or any such other
         deduction. This Clause shall only apply to taxes imposed, levied or
         assessed by or on behalf of the United Kingdom or the jurisdiction of
         incorporation of a Borrower or any other jurisdiction from or through
         which a Borrower may choose to make any payment under this Agreement
         (or any federation or organisation of which the United Kingdom or any
         such other jurisdiction is a member) or any political sub-division or
         authority of any of the foregoing.


                                     - 26 -
<PAGE>   29

11.2     TAX RECEIPTS

         All taxes required by law to be deducted or withheld by a Borrower from
         any amounts paid or payable under this Agreement shall be paid by that
         Borrower when due and that Borrower shall, within 30 days of the
         payment being made, deliver to the Agent for the relevant Bank evidence
         satisfactory to that Bank (including any relevant tax receipts) that
         the payment has been duly remitted to the appropriate authority.

11.3     US TAX FORMS

(a)      Each Bank (other than any that is organised under the federal laws of,
         or the laws of any of, the United States of America or the District of
         Columbia) shall, subject to paragraph (c) below, deliver to each US
         Borrower and the Agent as soon as practicable and in any case within 30
         days of the later of its Participation Date and the date on which the
         US Borrower becomes a Party (and prior to the expiry of any such form
         previously provided), the appropriate number of copies of duly executed
         US Internal Revenue Service Form 1001 or 4224, whichever is applicable
         (in each case together with a Form W-8, if required) or any successor
         to such relevant form allowing the US Borrower to make payments to that
         Bank without deduction or withholding in respect of taxes in the United
         States of America.

(b)      Each Bank that is organised under the federal laws of, or the laws of
         any of, the United States of America of the District of Columbia shall,
         subject to paragraph (c) below, deliver to each US Borrower and the
         Agent as soon as practicable and in any case within 30 days of its
         Participation Date (and prior to the expiry of any such form previously
         provided) the appropriate number of copies of duly executed US Internal
         Revenue Service Form W-9 or any successor to such form.

(c)      No Bank is obliged to deliver any form(s) under paragraph (a) or (b)
         above to the extent that the Bank is unable to do so, or it would be
         inappropriate for it to do so, as a result of the introduction of or
         any change in, or in the interpretation or application by any relevant
         authority of, any law or regulation or any practice or concession of
         the US Internal Revenue Service after the date of this Agreement.

11.4     OTHER TAX FORMS

(a)      Each Bank shall, so far as it is able, promptly (in respect of the
         Company) and (in respect of any Additional Borrower) promptly on
         request by the relevant Borrower, provide any applicable information or
         documentation to the appropriate tax authority in the jurisdiction of
         incorporation of that Borrower and (if applicable) the jurisdiction in
         which the Facility Office of that Bank is situated with a view to
         ensuring that, by virtue of the application of any Double Taxation


                                     - 27 -
<PAGE>   30

         Treaty or otherwise, that Borrower is enabled to make payments to that
         Bank without deduction or withholding in respect of taxes in the
         jurisdiction of incorporation of that Borrower.

(b)      Each Bank shall, so far as it is able, promptly complete and file with
         the relevant tax authorities all applicable forms required by that
         Borrower and shall use reasonable endeavours to procure that the
         applicable forms are lodged with the appropriate tax authority in the
         jurisdiction of incorporation of that Borrower and (if applicable) the
         jurisdiction in which the Facility Office of that Bank is situated as
         soon as reasonably practicable.

11.5     EXCEPTIONS TO GROSS-UP

(a)      If, otherwise than as a result of the introduction of, change in, or
         general change in the official interpretation, administration or
         application of, any law or regulation or any practice or concession of
         the appropriate tax authority in the jurisdiction of incorporation of a
         Borrower or the relevant Double Taxation Treaty on or after its
         Participation Date, a Bank is not or ceases to be a Qualifying Lender,
         that Borrower is not liable to pay to that Bank under Clause 11.1
         (Gross-up) any amount in respect of taxes levied or imposed by the
         jurisdiction of incorporation of that Borrower or any taxing authority
         thereof or therein in excess of the amount it would have been obliged
         to pay if that Bank had not ceased to be a Qualifying Lender.

(b)      For a Treaty Bank Clause 11.1 (Gross-up) shall not apply to the extent
         that deduction or withholding on account of the relevant taxes could
         have been avoided by obtaining the appropriate direction or regulation
         from the appropriate tax authority in the jurisdiction of incorporation
         of a Borrower to make a payment gross prior to the relevant payment,
         and the failure to obtain such a direction results solely from the
         relevant Bank failing to comply with its obligations under Clause 11.4
         (Other tax forms).

(c)      If a Bank fails to perform its obligations under Clause 11.3 (U.S. Tax
         forms), a US Borrower is not liable to pay that Bank under Clause 11.1
         (Gross-up) any amount in respect of taxes levied or imposed by the
         United States of America or any taxing authority thereof or therein in
         excess of the amount it would have been obliged to pay if that Bank had
         performed its obligations under Clause 11.3 (U.S. Tax forms).

11.6     WARRANTY BY EACH BANK

         Each Bank warrants to the Company that:

         (a)      it is a Qualifying Lender;


                                     - 28 -
<PAGE>   31

         (b)      it is in compliance with its obligations under Clause 11.4 
                  (Other tax forms); and

         (c)      for a Loan to a US Borrower, it is in compliance with its
                  obligations under Clause 11.3 (US tax forms).

         Those warranties will be deemed to be repeated by each Bank from its
         Participation Date and on the due date of each payment of interest to
         that Bank on a Loan, unless that Bank is not able to make them on that
         date as a result of the introduction of, change in, or general change
         in the official interpretation, administration or application of, any
         relevant law or any relevant practice or concession of the appropriate
         tax authority in the jurisdiction of incorporation of a Borrower the
         relevant Double Taxation Treaty after the date of this Agreement. If at
         any time after the date of this Agreement any Bank is aware that it is,
         or will become, unable to make those warranties (for whatever reason),
         it shall promptly notify the Company.

11.7     REFUND OF TAX CREDITS

         If a Borrower makes a payment under Clause 11.1 (a "TAX PAYMENT") in
         respect of a payment to the Agent or a Bank under this Agreement and
         the Agent or Bank determines in its discretion that it has obtained a
         refund of tax or obtained and used a credit against tax on its overall
         net income (a "TAX CREDIT") which the Agent or Bank is able to identify
         as attributable to that Tax Payment, then the Agent or Bank shall
         reimburse that Borrower such amount as the Agent or Bank determines to
         be such proportion of that Tax Credit as will leave the Agent or Bank
         (after that reimbursement) in no better or worse position in respect of
         its worldwide tax liabilities than it would have been in if no Tax
         Payment had been required. That Bank or the Agent shall not be obliged
         to disclose any information regarding its tax affairs and computations.

12.      MARKET DISRUPTION

(a)      Where paragraph (c) of the definition of LIBOR applies, if a Reference
         Bank does not supply an offered rate by 12.30 p.m. (or, where Clause
         9.1 (Change of Currency) applies, 2.30 p.m.) on a Rate Fixing Date, the
         applicable LIBOR shall, subject to paragraph (b) below, be determined
         on the basis of the quotations of the remaining Reference Banks.

(b)      If, in relation to any proposed Loan:


                                     - 29 -
<PAGE>   32

         (i)      where paragraph (c) of the definition of LIBOR applies, no, or
                  only one, Reference Bank supplies a rate for the purposes of
                  determining the applicable LIBOR; or

         (ii)     the Agent receives notification from Banks whose
                  participations in a Loan exceed 50 per cent. of that Loan
                  that, in their opinion:

                  (A)      matching deposits are not reasonably likely to be
                           available to them in the London interbank market in
                           the ordinary course of business to fund their
                           participations in that Loan for the relevant Term; or

                  (B)      the cost to them of matching deposits in the London
                           interbank market would be in excess of the relevant
                           LIBOR.

         the Agent shall promptly notify the relevant Borrower and the relevant
         Banks of the fact and that this Clause 12 is in operation.

(c)      After any notification under paragraph (b) above

         (i)      unless the relevant Borrower notifies the Agent before close
                  of business in London on the day it receives notification
                  under paragraph (b) above that it no longer wishes the Loan to
                  be made (in which case the Loan shall not be made) the Loan
                  shall be made;

         (ii)     within 5 Business Days of receipt of the notification, that
                  Borrower, the Company and the Agent shall enter into
                  negotiations for a period of not more than 30 days with a view
                  to agreeing a substitute basis for determining the rate of
                  interest and/or funding applicable to that Loan and any future
                  Loan to be denominated in the currency of the affected Loan;

         (iii)    any substitute basis agreed under sub-paragraph (ii) above
                  shall be, with the prior consent of all the Banks, binding on
                  all the Parties;

                  (iv) if no alternative basis is agreed under sub-paragraph
                  (ii) above, each Bank (through the Agent) shall certify on or
                  before the last day of the Term to which the notification
                  relates an alternative basis for maintaining its participation
                  in that Loan;

         (v)      any alternative basis referred to in sub-paragraph (iv) above
                  may include an alternative method of fixing the interest rate,
                  alternative Terms or alternative currencies but it must
                  reflect the cost to the Bank of funding its participation in
                  the Loan from whatever sources it may reasonably select plus
                  the Margin plus any applicable MLA Cost; and


                                     - 30 -
<PAGE>   33

         (vi)     each alternative basis so certified shall be binding on the
                  relevant Borrower and the certifying Bank and treated as part
                  of this Agreement.

13.      INCREASED COSTS

13.1     INCREASED COSTS

(a)      Subject to Clause 13.2 (Exceptions), the Company shall forthwith on
         demand by a Finance Party pay that Finance Party the amount of any
         increased cost incurred by it or its Holding Company as a result of the
         introduction of or any change in or change in the interpretation or
         application of any law or regulation (including any relating to
         taxation or reserve asset, special deposit, cash ratio, liquidity or
         capital adequacy requirements or any other form of banking or monetary
         control).

(b) In this Agreement "INCREASED COST" means:

         (i)      an additional cost incurred by a Finance Party or its Holding
                  Company as a result of the Finance Party having entered into,
                  or performing, maintaining or funding its obligations under,
                  this Agreement;

         (ii)     that portion of an additional cost incurred by a Finance Party
                  or its Holding Company in the Finance Party making, funding or
                  maintaining all or any advances comprised in a class of
                  advances formed by or including the participations in the
                  Loans made or to be made under this Agreement as is
                  attributable to it making, funding or maintaining those
                  participations; or

         (iii)    a reduction in any amount payable to a Finance Party or the
                  effective return to a Finance Party or its Holding Company
                  under this Agreement or on its capital; or

         (iv)     the amount of any payment made by a Finance Party or its
                  Holding Company, or the amount of interest or other return
                  foregone by a Finance Party or its Holding Company, calculated
                  by reference to any amount received or receivable by a Finance
                  Party from any other Party under this Agreement.

         (c)      When calculating an increased cost, the Finance Party
                  concerned may allocate or spread costs, liabilities and losses
                  to or across its liabilities or assets, or any class of
                  liabilities or assets, and on such basis, as it reasonably
                  considers fair and appropriate. At the same time as it makes a
                  demand under (a) above, the Finance Party shall supply a
                  certificate of its increased costs containing reasonable
                  details of the amount and basis of its claim. No


                                     - 31 -
<PAGE>   34

                  Finance Party is under an obligation to disclose information
                  which it reasonably considers to be confidential.

13.2     EXCEPTIONS

         Clause 13.1 (Increased costs) does not apply to any increased cost:

         (a)      compensated for by the payment of the MLA Cost;

         (b)      compensated for by the operation of Clause 11 (Taxes) or which
                  would be so compensated but for Clause 11.5 (Exceptions to
                  Gross-up);

         (c)      on account of tax on the overall net income of a Bank (or the
                  overall net income of a division or branch of the Bank)
                  imposed in the jurisdiction in which its principal office or
                  Facility Office is situate; or

         (d)      which results from the implementation, as contemplated as at
                  the signing of this Agreement, of the matters set out in the
                  July 1988 report of the Basle Committee on Banking Regulations
                  and Supervisory Practices entitled "International Convergence
                  of Capital Measurement and Capital Standards", the Directive
                  of the Council of the European Communities on a Solvency Ratio
                  for Credit Institutions (89/647/EEC of 18th December, 1989)
                  and/or the Directive of the Council of the European
                  Communities on Own Funds of Credit Institutions (89/299/EEC of
                  l7th April, 1989) in each case as amended prior to the date of
                  this Agreement) unless it results from any change in, or in
                  the interpretation or application of, these matters after the
                  signing of this Agreement.

13.3     REGULATION D COSTS

         Each US Borrower shall, promptly upon demand by any Bank (through the
         Agent), pay to that Bank the amount of any Regulation D Costs actually
         incurred by that Bank in respect of any Loans made by it to that US
         Borrower. Any such demand shall contain reasonable details of the
         calculation of the relevant Regulation D Costs.

         14.      ILLEGALITY

         If it becomes unlawful in any jurisdiction for a Bank to give effect to
         any of its obligations as contemplated by this Agreement or to fund or
         maintain its participation in any Loan, then:

         (a)      the Bank may notify the Company through the Agent accordingly;
                  and


                                     - 32 -
<PAGE>   35

         (b)      (i)      each Borrower shall forthwith prepay that Bank's
                           participation in all the Loans to that Borrower,
                           together with all other amounts payable by it to that
                           Bank under this Agreement; and

                  (ii)     the Bank's Commitment shall be cancelled.

15.      GUARANTEE

15.1     GUARANTEE

         The Company irrevocably and unconditionally:

         (a)      as principal obligor, guarantees to each Finance Party the due
                  and punctual payment within 3 Business Days of demand of any
                  and every sum or sums of money which any Borrower (other than
                  the Company) under the Finance Documents shall at any time be
                  liable to pay to each Finance Party and which have not been
                  paid at the time such demand is made; and

         (b)      indemnifies each Finance Party within 3 Business Days of
                  demand against any loss or liability suffered by it if any
                  obligation guaranteed by the Company is or becomes
                  unenforceable, invalid or illegal the amount of such loss or
                  liability being the amount which the Party suffering the same
                  would otherwise have been entitled to recover from the Company
                  under this Clause 15 (Guarantee).

15.2     CONTINUING GUARANTEE

         This guarantee is a continuing guarantee and will extend to the
         ultimate balance of all sums payable by the Borrowers under the Finance
         Documents, regardless of any intermediate payment or discharge in whole
         or in part.

15.3     REINSTATEMENT

(a)      Where any discharge (whether in respect of the obligations of any
         Borrower or any security for those obligations or otherwise) is made in
         whole or in part or any arrangement is made on the faith of any
         payment, security or other disposition which is avoided or must be
         restored on insolvency, liquidation or otherwise without limitation,
         the liability of the Company under this Clause 15 (Guarantee) shall
         continue as if the discharge or arrangement had not occurred.

(b)      Each Finance Party may concede or compromise any claim that any
         payment, security or other disposition is liable to avoidance or
         restoration.


                                     - 33 -
<PAGE>   36

15.4     WAIVER OF DEFENCES

         The obligations of the Company under this Clause 15 (Guarantee) will
         not be affected by any act, omission, matter or thing which, but for
         this provision, would reduce, release or prejudice any of its
         obligations under this Clause 15 (Guarantee) or prejudice or diminish
         those obligations in whole or in part, including (whether or not known
         to it or any Finance Party):

         (a)      any time or waiver granted to, or composition with, any
                  Borrower or other person;

         (b)      the taking, variation, compromise, exchange, renewal or
                  release of, or refusal or neglect to perfect, take up or
                  enforce, any rights against, or security over assets of, any
                  Borrower or other person or any non-presentation or
                  non-observance of any formality or other requirement of any
                  security;

         (c)      any incapacity or lack of powers, authority or legal
                  personality of or dissolution or change in the members or
                  status of a Borrower or any other person;

         (d)      any variation (however fundamental) or replacement of a
                  Finance Document or any other document or security so that
                  references to that Finance Document in this Clause 15
                  (Guarantee) shall include each variation or replacement;

         (e)      any unenforceability, illegality or invalidity of any
                  obligation of any person under any Finance Document or any
                  other document or security, to the intent that the Company's
                  obligations under this Clause 15 (Guarantee) shall remain in
                  full force and its guarantee be construed accordingly, as if
                  there were no unenforceability, illegality or invalidity;

         (f)      any postponement, discharge, reduction, non-provability or
                  other similar circumstances affecting any obligation of any
                  Borrower under a Finance Document resulting from any
                  insolvency, liquidation or dissolution proceedings or from any
                  law, regulation or order so that each such obligation shall
                  for the purposes of the Company's obligations under this
                  Clause 15 (Guarantee) be construed as if there were no such
                  circumstance.

15.5     IMMEDIATE RECOURSE

         The Company waives any right it may have of first requiring any Finance
         Party (or any trustee or agent on its behalf) to proceed against or
         enforce any other rights or 


                                     - 34 -
<PAGE>   37

         security or claim payment from any person before claiming from the
         Company under this Clause 15 (Guarantee).

15.6     APPROPRIATIONS

         Until all amounts which may be or become payable by the Borrowers under
         or in connection with the Finance Documents have been irrevocably paid
         in full, each finance Party (or any trustee or agent on its behalf)
         may:

         (a)      refrain from applying or enforcing any other moneys, security
                  or rights held or received by that Finance Party (or any
                  trustee or agent on its behalf) in respect of those amounts,
                  or apply and enforce the same in such manner and order as it
                  sees fit (whether against those amounts or otherwise) and the
                  Company shall not be entitled to the benefit of the same; and

         (b)      hold in an interest bearing suspense account any moneys
                  received from the Company or on account of the Company's
                  liability under this Clause 15 (Guarantee).

15.7     NON-COMPETITION

         Until all amounts which may be or become payable by the Borrowers under
         or in connection with the Finance Documents have been irrevocably paid
         in full, the Company shall not, after a claim has been made or by
         virtue of any payment or performance by it under this Clause 15
         (Guarantee):

         (a)      be subrogated to any rights, security or moneys held, received
                  or receivable by any Finance Party (or any trustee or agent on
                  its behalf) or be entitled to any right of contribution or
                  indemnity in respect of any payment made or moneys received on
                  account of the Company's liability under this Clause 15
                  (Guarantee);

         (b)      claim, rank, prove or vote as a creditor of any Borrower or
                  its estate in competition with any Finance Party (or any
                  trustee or agent on its behalf); or

         (c)      receive, claim or have the benefit of any payment,
                  distribution or security from or on account of any Borrower,
                  or exercise any right of set-off as against any Borrower.

         The Company shall hold in trust for and forthwith pay or transfer to
         the Agent for the Finance Parties any payment or distribution or
         benefit of security received by it 


                                     - 35 -
<PAGE>   38

         contrary to this Clause 15.7 (Non-competition). Nothing in this Clause
         15.7 (Non-competition) shall be effective to create a Security
         Interest.

15.8     ADDITIONAL SECURITY

         This guarantee is in addition to and is not in any way prejudiced by
         any other security now or hereafter held by any Finance Party.

16.      REPRESENTATIONS AND WARRANTIES

16.1     REPRESENTATIONS AND WARRANTIES

(a)      Each Borrower (other than the Company) makes, in respect of itself, the
         representations and warranties set out in this Clause 16
         (Representations and warranties) to each Finance Party; and

(b)      the Company, in respect of itself and each Material Subsidiary, makes
         the representations and warranties set out in this Clause 16
         (Representations and warranties) to each Finance Party.

16.2     STATUS

(a)      It is a limited liability company, duly incorporated and validly
         existing under the laws of the jurisdiction of its incorporation and,
         in the case of a US Borrower, is in good standing under such laws; and

(b)      it and each of the Material Subsidiaries has the power to own its
         assets and carry on its business as it is being conducted.

16.3     POWERS AND AUTHORITY

         It has the power to enter into and perform, and has taken all necessary
         action to authorise the entry into, performance and delivery of, the
         Finance Documents to which it is or will be a party and the
         transactions contemplated by those Finance Documents.

16.4     LEGAL VALIDITY

         Each Finance Document to which it is or will be a party constitutes, or
         when executed in accordance with its terms will constitute, its legal,
         valid and binding obligation enforceable in accordance with its terms
         (subject to the qualifications as to matters of law only contained in
         any legal opinion delivered to the Agent under Schedule 2).


                                     - 36 -
<PAGE>   39

16.5     NON-CONFLICT

         The entry into and performance by it of, and the transactions
         contemplated by, the Finance Documents do not and will not:

         (a)      conflict in any respect with any law or regulation or judicial
                  or official order to which it is subject; or

         (b)      conflict with its constitutional documents; or

         (c)      conflict in any material respect with any material document
                  which is binding upon it or any of the Material Subsidiaries
                  or any of its assets or the assets of any of the Material
                  Subsidiaries.

16.6     NO DEFAULT

(a)      No Event of Default is outstanding or will result from the making of
         any Loan; and

(b)      no other event is outstanding which constitutes a material default
         under any document which is binding on it or any of the Material
         Subsidiaries or any asset of it or any of the Material Subsidiaries to
         an extent or in a manner which would be reasonably likely to have a
         material adverse effect on the ability of the Company to perform its
         obligations under this Agreement.

16.7     AUTHORISATIONS

         All necessary authorisations in connection with the entry into,
         performance, validity and enforceability of, and the transactions
         contemplated by, the Finance Documents have been obtained or effected
         (as appropriate) and are in full force and effect.

16.8     ACCOUNTS

         In the case of the Company only, the audited consolidated accounts of
         the Group most recently delivered to the Agent (which, at the date of
         this Agreement, are the Original Group Accounts):

         (a)      have been prepared in accordance with accounting principles
                  and practices generally accepted in the United Kingdom
                  consistently applied; and

         (b)      present a true and fair view of the consolidated financial
                  condition of the Group as at the date to which they were drawn
                  up.


                                     - 37 -
<PAGE>   40

16.9     LITIGATION

         No litigation, arbitration or administrative proceedings are current
         or, to its knowledge, pending or threatened in which it is reasonably
         likely that there will be a determination adverse to the Company and
         which would, if adversely determined, have a material adverse effect on
         the ability of the Company to perform its obligations under this
         Agreement.

16.10    CERTAIN US GOVERNMENTAL REGULATION

         In the case of a US Borrower only, no US Borrower is subject to
         regulation under the United States Public Utility Holding Company Act
         of 1935, the United States Federal Power Act or the United States
         Investment Company Act of 1940 or to any United States federal or state
         statute or regulation limiting its ability to incur indebtedness.

16.11    SECURITIES ACTIVITIES

         In the case of a US Borrower only, no US Borrower is engaged
         principally, or as one of its important activities, in the business of
         extending credit for the purpose of purchasing or carrying any margin
         stock (within the meaning of Regulation U of the Board of Governors of
         the United States Federal Reserve System).

16.12    SOLVENCY

         In the case of a US Borrower only, each US Borrower:

         (a)      owns assets the fair saleable value of which is greater than
                  the amount that will be required to pay its probable liability
                  on its existing debts as they mature;

         (b)      has capital that is not unreasonably small in relation to its
                  business as presently conducted or any contemplated or
                  undertaken transaction; and

         (c)      does not intend to incur and does not believe that it will
                  incur debts beyond its ability to pay such debts as they
                  become due.

16.13    OWNERSHIP OF BORROWERS

(a)      Each Borrower (other than the Company) is, on the, date of this 
         Agreement, a wholly-owned Subsidiary of the Company;

(b)      each Borrower (other than the Company) is a Subsidiary of the Company;
         and


                                     - 38 -
<PAGE>   41

(c)      the Company owns in excess of 50 per cent.  of the share capital of
         each Borrower (other than the Company).

16.14    TIMES FOR MAKING REPRESENTATIONS AND WARRANTIES

         The representations and warranties set out in this Clause 16
         (Representations and warranties):

         (a)      (i)      in the case of a Borrower which is a Party on the
                           date of this Agreement, are made on the date of this
                           Agreement; and

                  (ii)     in the case of an Additional Borrower, will be deemed
                           to be made by that Additional Borrower on the date it
                           executes a Borrower Accession Agreement; and

         (b)      (other than Clauses 16.6(b) (No default), 16.9 (Litigation)
                  and 16.13(a) (Ownership of Borrowers) and, in the case of a
                  Rollover Loan only, Clause 16.6(a) (No default)) are deemed to
                  be repeated by the Company and a Borrower on the date of each
                  Request by that Borrower, on each Drawdown Date for a Loan to
                  that Borrower and, by the Company, on the date of a Borrower
                  Accession Agreement with reference to the facts and
                  circumstances then existing.

17.      UNDERTAKINGS

17.1     DURATION

         The undertakings in this Clause 17 (Undertakings) remain in force from
         the date of this Agreement for so long as any amount is or may be
         outstanding under this Agreement or any Commitment is in force.

17.2     FINANCIAL INFORMATION

         The Company shall supply to the Agent in sufficient copies for all the
Banks:

         (a)      as soon as the same are available (and in any event within 135
                  days (or, in the case of Deutsche Siebe GmbH, 180 days) of the
                  end of each of its financial years), its audited consolidated
                  accounts and the audited financial statements for each
                  Borrower (other than the Company) for that financial year;

         (b)      as soon as the same are available (and in any event within 90
                  days of the end of the first half-year of each of its
                  financial years) its interim report; and


                                     - 39 -
<PAGE>   42

         (c)      (i)      together with the accounts specified in paragraph (a)
                           above, a certificate signed by two of its directors
                           (without personal liability) on its behalf setting
                           out in reasonable detail computations establishing
                           compliance with Clause 17.12 (Financial covenants);
                           and

                  (ii)     together with the accounts specified in paragraph (b)
                           above, a certificate signed by two of its directors
                           (without personal liability) on its behalf setting
                           out in reasonable detail computations establishing
                           compliance with Clause 17.12 (Financial covenants) as
                           at the date to which those accounts were drawn-up.

17.3     INFORMATION - MISCELLANEOUS

         Each Borrower shall supply to the Agent in sufficient copies for all of
         the Banks, if the Agent so requests:

         (a)      (in the case of the Company) all documents despatched by it to
                  its shareholders (or any class of them) or its creditors (or
                  any class of them) at the same time as they are despatched;

         (b)      promptly upon becoming aware of them, details of any
                  litigation, arbitration or administrative proceedings which
                  are current, threatened or pending, and which might, if
                  adversely determined. have a material adverse effect on the
                  ability of the Company to perform its obligations under this
                  Agreement; and

         (c)      (in the case of the Company) promptly, such further
                  information in the possession or control of any member of the
                  Group regarding its financial condition as the Majority Banks
                  may reasonably request and which the Company is at liberty to
                  disclose without breaching the rules or legal requirements of
                  the London Stock Exchange, any other applicable laws or any
                  duties of confidentiality owed to parties other than any
                  member of the Group.

17.4     NOTIFICATION OF DEFAULT

         Each Borrower shall notify the Agent of any Default (and the steps, if
         any, being taken to remedy it) promptly upon becoming aware of its
         occurrence.

17.5     COMPLIANCE CERTIFICATES

         The Company shall supply to the Agent:


                                     - 40 -
<PAGE>   43

         (a)      together with the accounts specified in Clause 17.2(a) and (b)
                  (Financial Information); and

                  (b) promptly at any other time, if the Agent so requests
                  (provided that the Agent may not make more than three such
                  requests during any financial year of the Company unless at
                  the date of the request a Default is outstanding),

         a certificate signed by two of its directors (without personal
         liability) on its behalf certifying that no Default is outstanding or,
         if a Default is outstanding, specifying the Default and the steps, if
         any, being taken to remedy it.

17.6     AUTHORISATIONS

         Each Borrower shall promptly:

         (a)      obtain, maintain and comply with the terms of; and

         (b)      supply certified copies to the Agent of,

         any authorisation required under any law or regulation to enable it to
         perform its obligations under, or for the validity or enforceability
         of, any Finance Document.

17.7     PARI PASSU RANKING

         Each of the Company and each other Borrower shall procure that its
         obligations under the Finance Documents do and will rank at least pari
         passu with all its other present and future unsecured obligations,
         except for those obligations which are mandatorily preferred by law
         applying to companies generally.

17.8     NEGATIVE PLEDGE

(a)      The Company shall not, and shall procure that none of its Material
         Subsidiaries will, create or permit to subsist any Security Interest on
         any of its assets unless at the same time the Company or, as the case
         may be, that Material Subsidiary creates a Security Interest in favour
         of the Banks securing all the obligations of the Borrowers under this
         Agreement upon the same assets, ranking at least pari passu with the
         other obligations secured on those assets.

(b)      Paragraph (a) does not apply to:

         (i)      any lien arising by operation of law (or by an agreement
                  evidencing the same) in the ordinary course of business and
                  securing amounts not more


                                     - 41 -
<PAGE>   44

                  than 30 days overdue or which is being contested in good faith
                  and by appropriate means;

         (ii)     Security Interests created by Siebe Inc. and/or any of its
                  Subsidiaries (whether on, before or (but only if in accordance
                  with the existing terms of the U.S. Facility) after the date
                  of this Agreement) to secure:

                  (A)      the U.S.  Facility; or

                  (B)      the secured facility dated 27th July, 1990 for Siebe
                           Inc. arranged by Bankers Trust Company, until the
                           date on which that facility is to be repaid or
                           prepaid in accordance with Clause 4.2 (Condition
                           precedent to the first Loan),

         provided that the principal amount of Financial Indebtedness secured
         thereby is not increased except, for the facility referred to in
         sub-paragraph (B) above only, by reason of any fluctuation in the
         amount outstanding under that facility and within the limits and in
         accordance with the terms of that facility; and

         (iii)    any Security Interests existing at the date of this Agreement
                  (which Security Interests secure a principal amount of
                  indebtedness incurred or committed to be lent not exceeding in
                  aggregate US$35.000,000 or its equivalent in other
                  currencies);

         (iv)     any Security Interest in respect of the refinancing, renewal
                  or extension of any indebtedness incurred or committed to be
                  lent and secured by any Security Interest referred to in
                  sub-paragraph (iii) above, provided that the principal amount
                  of any such secured indebtedness is not increased except to
                  the extent permitted by paragraph (xi) below:

         (v)      any Security Interest arising out of any rights of
                  consolidation, combination or set-off over any clearing or
                  current or deposit account in connection with a cash
                  management scheme operated by a member of the Group at its
                  clearing bank;

         (vi)     any Security Interest created by the Company or a Material
                  Subsidiary in respect of goods, the related documents of title
                  and/or other related documents arising or created in the
                  ordinary course of its business as security only for
                  indebtedness to a bank or financial institution relating to
                  the goods or documents on or over which that Security Interest
                  exists;


                                     - 42 -
<PAGE>   45

         (vii)    any Security Interest arising out of title retention
                  provisions in a supplier's standard conditions of supply of
                  goods acquired by the relevant person in the ordinary course
                  of business,

         (viii)   any Security Interest existing at the time of acquisition on
                  or over any asset acquired by the Company or a Material
                  Subsidiary after the date of this Agreement and not created in
                  contemplation of or in connection with that acquisition and
                  any Security Interest created in respect of the refinancing or
                  renewal of the indebtedness to which that Security Interest
                  relates, provided that the principal amount of that
                  indebtedness is not increased after the date of the
                  acquisition;

         (ix)     in the case of any company which becomes a Subsidiary after
                  the date of this Agreement, any Security Interest existing on
                  or over its assets when it becomes a Subsidiary and not
                  created in contemplation of or in connection with it becoming
                  a Subsidiary and any Security Interest created in respect of
                  the refinancing or renewal of the indebtedness to which that
                  Security Interest relates, provided that the principal amount
                  of that indebtedness is not increased after the date of that
                  company becoming a Subsidiary;

         (x)      any Security Interest on credit balances with a bank or
                  similar financial institution as security for back-to-back or
                  similar finance to be provided to a member of the Group;

         (xi)     any Security Interest created or outstanding on or over assets
                  of the Company or any Material Subsidiary, provided that the
                  aggregate outstanding principal, capital or nominal amount
                  secured by all Security Interests created or outstanding under
                  this exception (including any indebtedness which exceeds the
                  limit referred to in paragraph (id) above) on or over assets
                  of the Company or any Material Subsidiary must not at any time
                  exceed 10 per cent. of the Tangible Consolidated Net Worth (as
                  defined in Clause 17.12 (Financial covenants)) in aggregate or
                  its equivalent (as reasonably determined by the Agent); and

         (xii)    any Security Interest not otherwise permitted by the above
                  provisions which is created or subsists with the prior written
                  consent of the Majority Banks.

17.9     TRANSACTIONS SIMILAR TO SECURITY

(a)      Subject to paragraph (b) below, the Company shall not, and the Company
         shall procure that none of its Material Subsidiaries will:


                                     - 43 -
<PAGE>   46

         (i)      sell, transfer or otherwise dispose of any of its assets on
                  terms whereby it is or may be leased to or re-acquired or
                  acquired by a member of the Group or any of its related
                  entities; or

         (ii)     sell, transfer or otherwise dispose of any of its receivables
                  on terms which provide for recourse to the Company or any
                  Material Subsidiary in the event that such a receivable is
                  uncollectable, except for the discounting of bills or notes in
                  the ordinary course of trading,

         in circumstances where the transaction is entered into primarily as a
         method of raising finance or of financing the acquisition of an asset.

(b)      Paragraph (a) does not apply to:

         (i)      any such transaction that may be entered into:

                  (A)      with the prior consent of the Majority Banks; or

                  (B)      where that transaction (together with all other such
                           transactions, whether related or not) would
                           constitute a disposal which is not substantial in
                           relation to the assets of the Group as a whole; and

         (ii)     a sale, transfer or disposal of assets on arm's length terms
                  (on terms whereby it is or may be so leased or re-acquired)
                  within 180 days of the purchase, transfer or acquisition of
                  those assets by the Company or any Material Subsidiary, as the
                  case may be.

17.10             DISPOSALS

(a)      The Company shall not, and the Company shall procure that no other
         member of the Group will, either in a single transaction or in a series
         of transactions, whether related or not and whether voluntarily or
         involuntarily, sell, transfer, grant or lease or otherwise dispose of
         all or any substantial part of its assets.

(b)      Paragraph (a) does not apply to:

         (i)      disposals made in the ordinary course of business of the
                  disposing entity; or

         (ii)     disposals of assets in exchange for, or for cash proceeds
                  which are used within 3 months of that disposal to acquire,
                  other assets comparable or superior as to type, value and
                  quality; or

         (iii)    disposals made with prior consent of the Majority Banks; or


                                     - 44 -
<PAGE>   47

         (iv)     disposals which are not substantial in the context of the
                  Group taken as a whole; or

         (v)      disposals by one member of the Group to the Company or to
                  another member of the Group in circumstances where the direct
                  or indirect shareholding or other interest of the Company in
                  that other member of the Group acquiring the asset in question
                  is equal to or greater than the direct or indirect
                  shareholding or other interest of the Company in the member of
                  the Group disposing of that asset; or

         (vi)     disposals by a member of the Group to another member of the
                  Group where the Company's direct or indirect shareholding or
                  other interest in the member of the Group acquiring the asset
                  is less than its direct or indirect shareholding or other
                  interest in the member of the Group disposing of that asset,
                  provided that the disposal is on arm's length terms for market
                  value and for a consideration to be satisfied in full at the
                  time of the disposal; or

         (vii)    disposals on normal commercial terms on an arm's length basis
                  of obsolete assets or assets no longer required for the
                  purpose of the relevant person's business; or

         (viii)   the payment of cash as consideration for the acquisition of
                  any asset on normal commercial terms on an arm's length basis;
                  or

         (ix)     the temporary application of funds not immediately required in
                  the relevant person's business in the purchase or making of
                  investments or the realisation of those investments; or

         (x)      the application of the proceeds of an issue of securities
                  (whether equity or debt) for the purpose stated in the
                  prospectus or other offering document relating to that issue.

17.11             CHANGE OF BUSINESS

         The Company shall procure that no substantial change is made to the
         general nature or scope of the business of the Company or the Group
         from that carried on at the date of this Agreement. An extension or
         commencement of business to include allied, related or similar
         activities does not constitute a change of business for this purpose.

17.12             FINANCIAL COVENANTS

(a)      In this Clause 17.12:


                                     - 45 -
<PAGE>   48

         "EXCLUDED CASH"

         means, in respect of any member of the Group, the amount (if any) of
         any cash in hand or cash at bank or other form of deposit, in each
         case, of that member held outside the U.K. which or the proceeds of
         which, in accordance with all applicable foreign exchange laws or other
         laws, is or are not permitted at that time to be applied to meet any
         indebtedness included in the calculation of Total Consolidated
         Borrowings or to be remitted to the U.K.

         "INTEREST PAYABLE"

         means all interest, acceptance commission and all other continuing,
         regular or periodic costs, charges and expenses in the nature of
         interest (whether paid, payable or capitalized) incurred by the Group
         in effecting, servicing or maintaining Total Consolidated Borrowings
         during a financial year of the Group.

         "INVESTMENTS"

         means:

         (a)      the then current market value of marketable debt securities
                  issued or guaranteed by any OECD member government;

         (b)      short term deposits and money at call with a recognized bank,
                  building society or financial institution incorporated or
                  established in the OECD, except to the extent they constitute
                  Excluded Cash;

         (c)      the then current market value of any certificate of deposit
                  the term of which has 12 months or less remaining to maturity
                  issued by a recognised bank, building society or financial
                  institution incorporated or established in the OECD;

         (d)      the then current market value of any commercial paper and any
                  other negotiable money market instrument with a maximum
                  maturity of 12 months or less with ratings of Al granted by
                  Standard & Poor's Ratings Group and PI granted by Moody's
                  Investors Service, Inc. respectively (or, if a rating is
                  granted by only one of these agencies either A1 granted by
                  Standard & Poor's Ratings Group or P1 granted by Moody's
                  Investors Service, Inc.) or is issued or guaranteed by a
                  recognised bank or building society incorporated or
                  established in the OECD; and

         (e)      any cash in hand or cash at bank, except to the extent they
                  constitute Excluded Cash.


                                     - 46 -
<PAGE>   49

         "NET INTEREST"

         means Interest Payable less any interest or amounts in the nature of
         interest receivable by any member of the Group during the relevant
         financial year or, if not remittable to the UK, is receivable in an
         OECD country or is off-settable in the relevant jurisdiction against
         any Interest Payable.

         "OPERATING PROFIT"

         means the consolidated profits before tax (after adding back Interest
         Payable and any exceptional item shown as such in the Profit and Loss
         Account) of The Group for a financial year of the Group (before taking
         into account any extraordinary items; shown as such in the Profit and
         Loss Account).

         "TANGIBLE CONSOLIDATED NET WORTH"

         means at any time the aggregate of,

         (i)      the amount paid up or credited as paid up on the issued share
                  capital of the Company; and

         (ii)     the amount standing to the credit of the consolidated capital
                  and revenue reserves of the Group;

         based on the Balance Sheet but adjusted by:

         (A)      adding any amount standing to the credit of the profit and
                  loss account for the Group for the period ending on the date
                  of the Balance Sheet, to the extent not included in
                  sub-paragraph (ii) above and to the extent the amount is not
                  attributable to any dividend or other distribution declared,
                  recommended or made by any member of the Group;

         (B)      deducting (to the extent not already reflected in the
                  reserves) any amount standing to the debit of the profit and
                  loss account for the Group for the period ending on the date
                  of the Balance Sheet;

         (C)      deducting any amount attributable to goodwill or any other
                  intangible asset except that any goodwill or any other
                  intangible asset arising on the acquisition of companies and
                  businesses made after the date of the Agreement will not be
                  deducted or (to the extent already deducted or written off)
                  will be added back;

         (D)      deducting (so far as not otherwise excluded as attributable to
                  minority interests) any amount attributable to an upward
                  revaluation of assets of any member


                                     - 47 -
<PAGE>   50

                  of the Group after 1st April, 1995 or, in the case of assets
                  of a company which becomes a member of the Group after that
                  date, the date on which that company becomes a member of the
                  Group, save where the upward revaluation is made pursuant to
                  SSAP 14;

         (E)      reflecting any variation in the amount of the issued share
                  capital of the Company and the consolidated capital and
                  revenue reserves of the Group after the date of the Balance
                  Sheet;

         (F)      reflecting any variation in the interest of the Company in any
                  other member of the Group since the date of the Balance Sheet;

         (G)      excluding any amount attributable to deferred taxation (other
                  than deferred taxation insofar as standing to the credit of
                  reserves in accordance with SSAP 15);

         (H)      excluding any amount attributable to minority interests; and

         (I)      eliminating inconsistencies between the accounting principles
                  applied in connection with the Balance Sheet and those applied
                  in connection with the Original Group Accounts.

"TOTAL CONSOLIDATED BORROWINGS"

means at any time the aggregate (without double counting) of the following:

         (i)      the outstanding principal amount of any moneys borrowed by any
                  member of the Group and any outstanding overdraft debit
                  balance of any member of the Group;

         (ii)     the outstanding principal amount of any debenture, bond, note,
                  loan stock or other security (other than equity which is not a
                  mechanism for borrowing) of any member of the Group;

         (iii)    the outstanding principal amount of any acceptance under any
                  acceptance credit opened by a bank or other financial
                  institution in favour of any member of the Group, except for
                  any such acceptance credit opened in the ordinary course of
                  trade the term of which is 180 days or less;

         (iv)     the outstanding principal amount of all moneys owing by a
                  member of the Group in connection with the sale or discounting
                  of receivables (otherwise than on a nonrecourse basis);


                                     - 48 -
<PAGE>   51

         (v)      the outstanding principal amount of any indebtedness of any
                  member of the Group arising from any advance or deferred
                  payment agreements arranged primarily as a method of raising
                  finance or financing the acquisition of an asset (other than
                  any asset obtained on normal commercial terms in the ordinary
                  course of trading);

         (vi)     the capitalised element of indebtedness of any member of the
                  Group in respect of a lease entered into primarily as a method
                  of raising finance or financing the acquisition of the asset
                  leased;

         (vii)    any fixed or minimum premium payable on the repayment or
                  redemption at maturity of any instrument referred to in
                  sub-paragraph (ii) above; and

         (viii)   the outstanding principal amount of any indebtedness of any
                  person of a type referred to in sub-paragraphs (i) - (vii)
                  above which is the subject of a guarantee or indemnity by any
                  member of the Group,

         other than any Financial Indebtedness owed by one member of the Group
         to another member of the Group.

         Any amount outstanding in a currency other than Sterling is to be taken
         into account at the relevant rate of exchange used in the preparation
         of the financial statement in question, but if there is no such
         financial statement, at its Sterling equivalent calculated on the basis
         of the Agent's spot rate of exchange for the purchase of that currency
         in the London foreign exchange market with Sterling at or about 11.00
         a.m. on the day the relevant amount falls to be calculated.

         "TOTAL CONSOLIDATED NET BORROWINGS"

         means at any time Total Consolidated Borrowings at that time less
         Investments at that time of any member of the Group.

(b)      All the terms used in paragraph (a) above are to be calculated in
         accordance with the accounting principles applied in connection with
         the Original Group Accounts.

(c) The Company shall procure that:

         (i)      Tangible Consolidated Net Worth is not at any time less than
                  (pound)525,000,000;

         (ii)     the ratio of Total Consolidated Net Borrowings to Tangible
                  Consolidated Net Worth is not at any time more than 1.25:1;
                  and

         (III)    the ratio of Operating Profit to Net Interest is not, at the
                  end of each financial year of the Group, less than 3.00:1.


                                     - 49 -
<PAGE>   52

17.13    SUBSIDIARY BORROWINGS

         No Borrower other than the Company shall, and the Company shall procure
         that no Material Subsidiary will, incur any Borrowings other than:

         (a)      Borrowings under this Agreement;

         (b)      Borrowings under the U.S. Facility or any refinancing of the
                  U.S. Facility but, except with the prior written consent of
                  the Majority Banks, the principal amount of that facility may
                  not be increased except by reason of any fluctuation in the
                  amount outstanding under that facility in accordance with its
                  terms;

         (c)      Borrowings from

                  (i)      the Company, or

                  (ii)     another Material Subsidiary; or

                  (iii)    any other Subsidiary (other than the Company or a
                           Material Subsidiary), except to the extent that the
                           Borrowings are funded by that Subsidiary from
                           Borrowings from outside the Group;

         (d)      in the case of a company that becomes a Subsidiary after the
                  date of this Agreement, any Borrowings of that Subsidiary
                  existing when it becomes a Subsidiary and not incurred in
                  connection with it becoming a Subsidiary or any Borrowings
                  incurred to refinance those Borrowings, provided that:

                  (i)      the principal amount of the Borrowings are not
                           increased after the date of that company becoming a
                           Subsidiary; and

                  (ii)     the borrowings are not guaranteed by the Company or 
                           any Material Subsidiary; and

         (e)      any Borrowings (other than Borrowings set out in
                  sub-paragraphs (a) to (d) (inclusive) above) of Material
                  Subsidiaries which do not exceed in aggregate USS350,000,000
                  (or its equivalent in any other currency or currencies).

17.14             GUARANTEES

         The Company shall procure that no guarantee or indemnity or other
         similar assurance against financial loss is granted by any of the
         Material Subsidiaries in respect of any Financial Indebtedness of the
         Company, unless a similar guarantee,


                                     - 50 -
<PAGE>   53

                  indemnity or other assurance has been granted in favour of the
                  Banks in respect of the Company's obligations under the
                  Finance Documents, except that Material Subsidiaries
                  incorporated in the UK may grant guarantees, in the ordinary
                  course of their business, to secure the Company's indebtedness
                  in respect of debit balances of members of the Group with the
                  Group's UK clearing banks (being currently Barclays Bank PLC,
                  National Westminster Bank Plc, Royal Bank of Scotland p1c,
                  Lloyds Bank Plc and Standard Chartered Bank) if:

         (a)      the bank to whom the guarantee is granted (the "BENEFICIARY")
                  is. at the time of granting the guarantee, providing group
                  overdraft limits to the Company and one or more of its UK
                  subsidiaries;

                  (b) the relevant guarantee extends only to cover debit
                  balances on accounts of members of the Group with the
                  Beneficiary included in the cash management scheme provided by
                  that Beneficiary; and

         (c)      the liability of each Material Subsidiary under any guarantee
                  provided by it under this exception is limited in amount to
                  the amount (if any) of the credit balance(s) on that Material
                  Subsidiary's account(s) with the Beneficiary which are part of
                  the cash management scheme provided by that Beneficiary.

17.15             COMPLIANCE WITH ERISA

(a)      No US Borrower shall, and the Company shall procure that no other
         member of the Group incorporated in the United States will, establish
         any new employee benefit plan or amend any existing employee benefit
         plan if the liability or increased liability resulting from such
         establishment or amendment would be reasonably likely to have a
         material adverse effect on the ability of the Company to perform its
         obligations under the Finance Documents.

(b)      Each US Borrower shall, and the Company shall procure that each US
         Borrower will, establish, maintain and operate each employee benefit
         plan maintained by each US Borrower and each person (an "ERISA
         AFFILIATE") which is a member of a group which is under common control
         with that US Borrower within the meaning of Section 414(b) and (c) of
         the United States Internal Revenue Code (the "IRC") for the benefit of
         any of the employers of that US Borrower or an ERISA affiliate in
         compliance in all material respects with the provisions of the United
         States Employee Retirement Income Security Act of 1974 ("ERISA"), the
         IRC and all other applicable laws and regulations except where failure
         to comply would not be reasonably likely to have a material adverse
         effect on the ability of the Company to perform its obligations under
         the Finance Documents, and shall not 


                                     - 51 -
<PAGE>   54

         permit any accumulated funding deficiency (as specified in the IRC) to
         occur with respect to any such employee benefit plan by more than an
         amount which would be reasonably likely to have a material adverse
         effect on the ability of the Company to perform its obligations under
         the Finance Documents.

18.      DEFAULT

18.1     EVENTS OF DEFAULT

         Each of the events set out in Clauses 18.2 (Non-Payment) to 18.14
         (Material adverse change) (inclusive) is an Event of Default (whether
         or not caused by any reason whatsoever outside the control of any
         Borrower or any other person).

         18.2     NON-PAYMENT

         Any Borrower does not pay within 3 Business Days of the due date any
         amount payable by it under the Finance Documents at the place at and in
         the currency in which it is expressed to be payable.

18.3     BREACH OF OTHER OBLIGATIONS

         Any Borrower does not comply with any provision of the Finance
         Documents (other than those referred to in Clause 18.2 (Non-payment))
         and, except in the case of a breach of Clause 17.12 (Financial
         covenants), if that default is capable of remedy, it is not remedied
         within 30 days after notice of that default is given to the Company by
         the Agent.

18.4     MISREPRESENTATION

         A representation, warranty or statement made or repeated in or in
         connection with any Finance Document or in any document delivered by or
         on behalf of any Borrower under or in connection with any Finance
         Document is incorrect in any material respect when made or deemed to be
         made or repeated.

18.5     CROSS-DEFAULT

(a)      Any Financial Indebtedtness of the Company or any Material Subsidiary
         is not paid when due or within any applicable grace period; or

(b)      an event of default howsoever described occurs under any document
         relating to Financial Indebtedness of the Company or any Material
         Subsidiary, unless the event of default:

         (i)      is not material; and


                                     - 52 -
<PAGE>   55

         (ii)     is remedied or unconditionally waived within 21 days of the
                  Company or the relevant Material Subsidiary becoming aware of
                  its occurrence without any lender concerned taking any action
                  to improve its position; or

(c)      any Financial Indebtedness of the Company or any Material Subsidiary
         becomes prematurely due and payable or is placed on demand, in either
         case as a result of an event of default (howsoever described) under the
         document relating to that Financial Indebtedness; or

(d)      any commitment for, or underwriting of, any Financial Indebtedness of
         the Company or any Material Subsidiary is cancelled or suspended as a
         result of an event of default (howsoever described) under the document
         relating to that Financial Indebtedness,

         provided that the aggregate amount of any such Financial Indebtedness
         referred to in paragraphs (a) to (d) above is equal to or exceeds
         US$10,000,000 or its equivalent in other currencies.

18.6     INSOLVENCY

(a)      The Company or any Material Subsidiary is, or is deemed for the
         purposes of any law (other than Section 123(i)(a) of the Insolvency act
         1986, in circumstances where the sum claimed in the statutory demand is
         being contested by the Company or the relevant Material Subsidiary in
         good faith and the Company or the relevant Material Subsidiary is able
         to show, to the reasonable satisfaction of the Agent, that the contest
         will succeed) to be, unable to pay its debts as they fall due or to be
         insolvent, or admits inability to pay its debts as they fall due; or

(b)      the Company or any Material Subsidiary suspends making payments on all
         or any class of its debts or announce, an intention to do so, or a
         moratorium is declared in respect of any of its indebtedness; or

(c)      the Company or any Material Subsidiary by reason of financial
         difficulties, begins negotiations with one or more of its creditors
         with a view to the readjustment or rescheduling or any of its
         indebtedness.

18.7     WINDING-UP AND OTHER PROCEEDINGS

         (a)      Any step (including petition, proposal or convening a meeting)
                  is taken by the Company or any Material Subsidiary with a view
                  to a composition, assignment or arrangement with any creditors
                  of the Company or any Material Subsidiary; or


                                     - 53 -
<PAGE>   56

         (b)      a meeting of the Company or any Material Subsidiary is
                  convened by the Company or any Material Subsidiary for the
                  purpose of considering any resolution for (or to petition for)
                  its winding-up of its administration or any such resolution is
                  passed; or

         (c)      any person presents a petition for the winding-up or for the
                  administration of the Company or any Material Subsidiary and,
                  in the case of a petition for the winding-up of the Company or
                  any Material Subsidiary, that petition is not withdrawn within
                  30 days of the Company or the relevant Material Subsidiary
                  becoming aware of the same or the Company or the relevant
                  Material Subsidiary is contesting the petition in good faith
                  and is able to show, to the reasonable satisfaction of the
                  Agent, that the petition for winding-up will be struck out or
                  dismissed; or

         (d)      any order for the winding-up or administration of the Company
                  or any Material Subsidiary is made,

         save for (i) the purposes of a reconstruction, amalgamation,
         reorganisation, merger or consolidation of the Company or the relevant
         Material Subsidiary on terms approved in advance by the Majority Banks
         (such approval, in the case of a Material Subsidiary (other than a
         Borrower), not to be unreasonably withheld) and (ii) the voluntary
         solvent winding-up of a Material Subsidiary (other than a Borrower).

18.8     APPOINTMENT OF RECEIVERS AND MANAGERS

(a)      Any liquidator, trustee in bankruptcy, judicial custodian, compulsory
         manager, receiver, administrative receiver, administrator or the like
         is appointed in respect of the Company or any Material Subsidiary or
         any part of its assets, save for (i) the purposes of a reconstruction,
         amalgamation, reorganisation, merger or consolidation of the Company or
         the relevant Material Subsidiary on terms approved in advance by the
         Majority Banks (such approval, in the case of a Material Subsidiary
         (other than a Borrower), not to be unreasonably withheld) and (ii) the
         voluntary solvent winding-up of a Material Subsidiary (other than a
         Borrower); or

(b)      the directors of the Company or any Material Subsidiary request the
         appointment of a liquidator, trustee in bankruptcy, judicial custodian,
         compulsory manager, receiver, administrative receiver, administrator or
         the like, save for (i) the purposes of a reconstruction, amalgamation,
         reorganisation, merger or consolidation of the Company or the relevant
         Material Subsidiary on terms approved in advance by the Majority Banks
         (such approval, in the case of a Material Subsidiary (other than a


                                     - 54 -
<PAGE>   57

         Borrower), not to be unreasonably withheld) and (ii) the voluntary
         solvent winding-up of a Material Subsidiary (other than a Borrower).

18.9     CREDITORS' PROCESS

         Any attachment, sequestration, distress or execution affects any asset
         of the Company or any Material Subsidiary and is not discharged within
         21 days of such action, unless being contested in good faith by
         appropriate means.

18.10    ANALOGOUS PROCEEDINGS

         There occurs, in relation to the Company or any Material Subsidiary,
         any event anywhere which, in the opinion of the Majority Banks,
         corresponds with any of those mentioned in Clauses 18.6 (Insolvency) to
         18.9 (Creditors' process) (inclusive).

18.11    CESSATION OF BUSINESS

         The Company or any Material Subsidiary ceases, or threatens to cease,
         to carry on all or a substantial part of its business save for (i) the
         purposes of a reconstruction, amalgamation, reorganisation, merger or
         consolidation of the Company or the relevant Material Subsidiary on
         terms approved in advance by the Majority Banks (such approval, in the
         case of a Material Subsidiary (other than a Borrower), not to be
         unreasonably withheld) and (ii) the voluntary solvent winding-up of a
         Material Subsidiary (other than a Borrower).

18.12    UNLAWFULNESS

         It is or becomes unlawful for a Borrower to perform any of its material
         obligations under the Finance Documents.

18.13    GUARANTEE

         The guarantee of the Company is not effective or is alleged by the
         Company to be ineffective for any reason.

18.14    MATERIAL ADVERSE CHANGE

         Any event or series of events occurs which, in the reasonable opinion
         of the Majority Banks, would have a material and adverse effect on the
         ability of the Company to comply with its obligations under the Finance
         Documents and each of the relevant Banks (through the Agent) shall
         promptly (but without prejudice to the rights of the Banks under this
         Agreement) provide the Company with a certificate


                                     - 55 -
<PAGE>   58

         setting out in reasonable detail the event or series of events in
         question and the reasons for such an opinion.

18.15    ACCELERATION

         On and at any time after the occurrence of an Event of Default if such
         Event of Default is continuing the Agent may, and shall if so directed
         by the Majority Banks, by notice to the Company:

         (a)      cancel the Total Commitments; and/or

         (b)      demand that all or part of the Loans, together with accrued
                  interest, and all other amounts accrued under this Agreement
                  be immediately due and payable, whereupon they shall become
                  immediately due and payable; and/or

         (c)      demand that all or part of the Loans be payable on demand,
                  whereupon they shall immediately become payable on demand.

19.      THE AGENT AND THE ARRANGERS

19.1     APPOINTMENT AND DUTIES OF THE AGENT

         Each Finance Party (other than the Agent) irrevocably appoints the
         Agent to act as its agent under and in connection with the Finance
         Documents, and irrevocably authorises the Agent on its behalf to
         perform the duties and to exercise the rights, powers and discretions
         that are specifically delegated to it under or in connection with the
         Finance Documents, together with any other incidental rights, powers
         and discretions. The Agent shall have only those duties which are
         expressly specified in this Agreement. Those duties are solely of a
         mechanical and administrative nature.

19.2     ROLE OF THE ARRANGERS

         Except as otherwise provided in this Agreement, no Arranger has any
         obligations of any kind to any other Party under or in connection with
         any Finance Document.

19.3     RELATIONSHIP

         The relationship between the Agent and the other Finance Parties is
         that of agent and principal only. Nothing in this Agreement constitutes
         the Agent as trustee or fiduciary for any other Party or any other
         person and the Agent need not hold in trust any moneys paid to it for a
         Party or be liable to account for interest on those moneys.


                                     - 56 -
<PAGE>   59

19.4     MAJORITY BANKS' DIRECTIONS

         The Agent will be fully protected if it acts in accordance with the
         instructions of the Majority Banks in connection with the exercise of
         any right, power or discretion or any matter not expressly provided for
         in the Finance Documents. Any such instructions given by the Majority
         Banks will be binding on all the Banks. In the absence of such
         instructions the Agent may act as it reasonably considers to be in the
         best interests of all the Banks, provided that the Agent may not start
         any legal proceedings on behalf of a Finance Party without that Finance
         Party's prior consent.

19.5     DELEGATION

         The Agent may act under the Finance Documents through its personnel and
         agents.

19.6     RESPONSIBILITY FOR DOCUMENTATION

         Neither the Agent nor any Arranger is responsible to any other Party
         for:

         (a)      the execution, genuineness, validity, enforceability or
                  sufficiency of any Finance Document or any other document; or

         (b)      the collectability of amounts payable under any Finance
                  Document; or

         (c)      the accuracy of any statements (whether written or oral) made
                  in or in connection with any Finance Document.

19.7     DEFAULT

(a)      The Agent is not obliged to monitor or enquire as to whether or not a
         Default has occurred. The Agent will not be deemed to have knowledge of
         the occurrence of a Default. However, if the Agent receives notice from
         a Party referring to this Agreement, describing the Default and stating
         that the event is a Default, it shall promptly notify the Banks.

(b)      The Agent may require the receipt of security satisfactory to it
         whether by way of payment in advance or otherwise, against any
         liability or loss which it will or may incur in taking any proceedings
         or action arising out of or in connection with any Finance Document
         before it commences these proceedings or takes that action.

19.8     EXONERATION

(a)      Without limiting paragraph (b) below, the Agent will not be liable to
         any other Party for any action taken or not taken by it under or in
         connection with any 


                                     - 57 -
<PAGE>   60

         Finance Document, unless directly caused by its gross negligence or
         wilful misconduct.

(b)      No Party may take any proceedings against any officer, employee or
         agent of the Agent in respect of any claim it might have against the
         Agent or in respect of any act or omission of any kind (including
         negligence or wilful misconduct) by that officer, employee or agent in
         relation to any Finance Document.

19.9     RELIANCE

         The Agent may:

         (a)      rely on any notice or document believed by it to be genuine
                  and correct and to have been signed by, or with the authority
                  of, the proper person;

         (b)      rely on any statement made by a director or employee of any
                  person regarding any matters which may reasonably be assumed
                  to be within his knowledge or within his power to verify; and

         (c)      engage, pay for and rely on legal or other professional
                  advisers selected by it (including those in the Agent's
                  employment and those representing a Party other than the
                  Agent).

19.10    CREDIT APPROVAL AND APPRAISAL

         Without affecting the responsibility of the Company for information
         supplied by it or on its behalf in connection with any Finance
         Document, each Bank confirms that it:

         (a)      his made its own independent investigation and assessment of
                  the financial condition and affairs of the Company and its
                  related entities in connection with its participation in this
                  Agreement and has not relied exclusively on any information
                  provided to it by the Agent or an Arranger in connection with
                  any Finance Document; and

         (b)      will continue to make its own independent appraisal of the
                  creditworthiness of the Company and its related entities while
                  any amount is or may be outstanding under the Finance
                  Documents or any Commitment is in force.

19.11    INFORMATION

(a)      The Agent shall promptly forward to the person concerned the original
         or a copy of any document which is delivered to the Agent by a Party
         for that person.




                                     - 58 -
<PAGE>   61

(b)      The Agent shall promptly supply a Bank with a copy of each document
         received by the Agent under Clause 4 (Conditions Precedent) upon the
         request and at the expense of that Bank.

(c)      Except where this Agreement specifically provides otherwise, the Agent
         is not obliged to review or check the accuracy or completeness of any
         document it forwards to another Party.

(d)      Except as provided above, the Agent has no duty:

         (i)      either initially or on a continuing basis to provide any Bank
                  with any credit or other information concerning the financial
                  condition or affairs of the Company or any related entity of
                  the Company whether coming into its possession or that of any
                  of its related entities before, on or after the date of this
                  Agreement; or

         (ii)     unless specifically requested to do so by a Bank in accordance
                  with this Agreement, to request any certificates or other
                  documents from any Borrower.

19.12    THE AGENT AND THE ARRANGERS INDIVIDUALLY

(a)      If it is also a Bank, each of the Agent and the Arrangers has the same
         rights and powers under this Agreement as any other Bank and may
         exercise those rights and powers as though it were not the Agent or an
         Arranger.

(b)      If it is also a Bank or an Arranger, any reference in the Finance
         Documents to the Agent means the agency department of the Agent
         specifically responsible for acting as Agent under and in connection
         with the Finance Documents, as referred to in Clause 32 (Notices). In
         acting as Agent, the agency department will be treated as a separate
         entity from any other department or division of the Bank or Arranger
         concerned. Without limiting the above, the Agent will not be deemed to
         have notice of a document, information, fact, matter or thing in the
         possession or knowledge of any other department or division of that
         Bank or Arranger.

(c)      Each of the Agent and the Arrangers may:

         (i)      carry on any business with the Company or its related
                  entities;

         (ii)     act as agent or trustee for, or in relation to any financing
                  involving, the Company or its related entities; and

         (iii)    retain any profits or remuneration in connection with its
                  activities under this Agreement or in relation to any of the
                  foregoing.


                                     - 59 -
<PAGE>   62

19.13    INDEMNITIES

(a)      Without limiting the liability of the Borrowers under the Finance
         Documents, each Bank shall, within 2 Business Days of demand, indemnify
         the Agent for its proportion of any liability or loss incurred by the
         Agent in any way relating to or arising out of its acting as the Agent,
         except to the extent that the liability or loss arises directly from
         the Agent's gross negligence or wilful misconduct.

(b)      A Bank's proportion of the liability or loss set out in paragraph (a)
         above is the proportion which its participation in the Loans (if any)
         bear to all the Loans on the date of the demand. If, however, there are
         no Loans outstanding on the date of demand, then the proportion will be
         the proportion which its Commitment bears to the Total Commitments at
         the date of demand or, if the Total Commitments have been cancelled,
         bore to the Total Commitments immediately before being cancelled.

19.14    COMPLIANCE

(a)      The Agent may refrain from doing anything which might, in its opinion,
         constitute a breach of any law or regulation or be otherwise actionable
         at the suit of any person, and may do anything which, in its opinion,
         is necessary or desirable to comply with any law or regulation of any
         jurisdiction.

(b)      Without limiting paragraph (a) above, the Agent need not disclose any
         information relating to the Company or any of its related entities if
         the disclosure might, in the opinion of the Agent, constitute a breach
         of any law or regulation or any duty of secrecy or confidentiality or
         be otherwise actionable at the suit of any person.

19.15    RESIGNATION OF AGENT

(a)      Notwithstanding its irrevocable appointment, the Agent may resign by
         giving notice to the Banks and the Company, in which case the Agent may
         forthwith appoint one of its Affiliates as successor Agent or, failing
         that, the Majority Banks may after consultation with the Company
         appoint a successor Agent.

(b)      If the appointment of a successor Agent is to be made by the Majority
         Banks but they have not, within 30 days after notice of resignation,
         appointed a successor Agent which accepts the appointment, the retiring
         Agent may after consultation with the Company appoint a successor
         Agent.

(c)      The resignation of the retiring Agent and the appointment of any
         successor Agent will both become effective only upon the successor
         Agent notifying all the Parties that it accepts the appointment. On
         giving the notification, the successor Agent

                                     - 60 -

<PAGE>   63

         will succeed to the position of the retiring Agent and the term "AGENT"
         will mean the successor Agent.

(d)      The retiring Agent shall, at its own cost, make available to the
         successor Agent such documents and records and provide such assistance
         as the successor Agent may reasonably request for the purposes of
         performing its functions as the Agent under this Agreement.

(e)      Upon its resignation becoming effective, this Clause 19 (The Agent and
         the Arrangers) shall continue to benefit the retiring Agent in respect
         of any action taken or not taken by it under or in connection with the
         Finance Documents while it was the Agent, and, subject to paragraph (d)
         above, it shall have no further obligation under any Finance Document.

(f)      The Majority Banks may, at any time, with the prior consent of the
         Company (such consent not to be unreasonably withheld) direct the Agent
         to resign, whereupon the Agent shall resign but may not appoint its
         successor. If the Majority Banks direct the Agent to resign, they may,
         with the prior consent of the Company (such consent not to be
         unreasonably withheld), appoint a successor Agent.

         19.16             BANKS

         The Agent may treat each Bank as a Bank, entitled to payments under
         this Agreement and as acting through its Facility Office(s) until it
         has received notice from the Bank to the contrary not less than 5
         Business Days prior to the relevant payment.

20.      FEES

20.1     FRONT-END FEE

         The Company shall pay to the Agent for the Arrangers within three
         Business Days of the date of this Agreement a front-end fee in the
         amount agreed in the Fee Letter between the Arrangers and the Company.
         The front-end fee shall be distributed by the Agent, on behalf of the
         Arrangers, among the Banks in the proportions agreed between the
         Arrangers and the Banks prior to the date of this Agreement.


                                     - 61 -
<PAGE>   64

20.2     COMMITMENT FEE

(a)      The Company shall pay to the Agent for each Bank a commitment fee
         computed at the rate of 0.1 per cent. per annum on the undrawn,
         uncancelled amount of that Bank's Commitment during the period from the
         date of this Agreement up to and including the Final Repayment Date.
         For this purpose, Loans are taken at their Original Dollar Amount.

(b)      Accrued commitment fee is payable semi-annually in arrears on the
         average unutilised portion of the Commitment. Accrued commitment fee is
         also payable to the Agent for the relevant Bank(s) on the cancelled
         amount of its Commitment at the time the cancellation takes effect.

20.3     AGENT'S FEE

         The Company shall pay to the Agent for its own account an agency fee in
         the amount agreed in the Fee Letter between the Agent and the Company.
         The agency fee is payable annually in advance. The first payment of
         this fee is payable within three Business Days of the date of this
         Agreement and each subsequent payment is payable on each anniversary of
         the date of this Agreement for so long as any amount is or may be
         outstanding under this Agreement or any Commitment is in force.

20.4     VAT

         Any fee referred to in this Clause 20 (Fees) is exclusive of any value
         added tax or any other tax which might be chargeable in connection with
         that fee. If any value added tax or other tax is so chargeable, it
         shall to the extent that such value added tax is irrecoverable by the
         Agent or the Bank, as the case may be, be paid by the Company at the
         same time as it pays the relevant fee.

21.      EXPENSES

21.1     INITIAL AND SPECIAL COSTS

         The Company shall within 2 Business Days of demand pay the Agent the
         amount of all reasonable costs and expenses (including legal fees)
         itemised in reasonable detail incurred by it in connection with:

         (a)      the negotiation, preparation, printing and execution of:

                  (i)      this Agreement;


                                     - 62 -
<PAGE>   65

                  (ii)     any other Finance Document (other than a Novation
                           Certificate) executed after the date of this
                           Agreement; and

         (b)      any amendment, waiver, consent or suspension of rights (or any
                  proposal for any of the foregoing) requested by or on behalf
                  of the Company and relating to a Finance Document.

21.2     ENFORCEMENT COSTS

         The Company shall within 2 Business Days of demand pay to each Finance
         Party the amount of all reasonable costs and expenses (including legal
         fees) incurred by it in connection with the enforcement of, or the
         preservation of any rights under, any Finance Document.

22.      STAMP DUTIES

         The Company shall pay and, within 2 Business Days of demand indemnify
         each Finance Party against any liability it incurs in respect of:

         (a)      any United Kingdom stamp, registration and similar tax which
                  is or becomes payable in connection with the entry into or,
                  performance of any Finance Document; and

         (b)      any stamp, registration and similar tax which is or becomes
                  payable in connection with the enforcement of any Finance
                  Document in any jurisdiction,

         other than any such tax payable in connection with any assignment or
         transfer by any Bank of any of its rights and/or obligations under this
         Agreement on the entering into of a Novation Certificate.

23.      INDEMNITIES

23.1     CURRENCY INDEMNITY

(a)      If a Finance Party receives an amount in respect of a Borrower's
         liability under the Finance Documents or if that liability is converted
         into a claim, proof, judgment or order in a currency other than the
         currency (the "CONTRACTUAL CURRENCY") in which the amount is expressed
         to be payable under the relevant Finance Document:

         (i)      that Borrower shall indemnify that Finance Party as an
                  independent obligation against any loss or liability arising
                  out of or as a result of the conversion;


                                     - 63 -
<PAGE>   66

         (ii)     if the amount received by that Finance Party, when converted
                  into the contractual currency at a market rate in the usual
                  course of its business, is less than the amount owed in the
                  contractual currency, that Borrower shall within 2 Business
                  Days of demand pay to that Finance Party an amount in the
                  contractual currency equal to the deficit; and

         (iii)    that Borrower shall pay to the Finance Party concerned on
                  demand any exchange costs, and taxes payable in connection
                  with any such conversion.

(b)      Each Borrower waives any right it may have in any jurisdiction to pay
         any amount under the Finance Documents in a currency other than that in
         which it is expressed to be payable.

23.2     OTHER INDEMNITIES

         The Company shall within 2 Business Days of demand indemnify each
         Finance Party against any loss or liability which that Finance Party
         incurs as a consequence of:

         (a)      the occurrence of any Event of Default;

         (b)      the operation of Clause 18.15 (Acceleration) or Clause 29 (Pro
                  rata sharing);

         (c)      any payment of principal or an overdue amount being received
                  from any source otherwise than on its Repayment Date and, for
                  the purposes of this paragraph (c), the Repayment Date of an
                  overdue amount is the last day of each Designated Term (as
                  defined in Clause 8.3 (Default interest)); or

         (d)      (other than by reason of negligence or default by a Finance
                  Party) a Loan not being made after a Borrower has delivered a
                  Request for that Loan.

         The Company's liability in each case includes any loss of margin or
         other loss or expense on account of funds borrowed, contracted for or
         utilized to fund any amount payable under any Finance Document, any
         amount repaid or prepaid or any Loan. At the same time it makes demand,
         the Finance Party shall supply a certificate of loss or liability
         containing reasonable details of the amount and basis of the claim.


                                     - 64 -
<PAGE>   67

24.      EVIDENCE AND CALCULATIONS

24.1     ACCOUNTS

         Accounts maintained by a Finance Party in connection with this
         Agreement are prima facie evidence of the matters to which they relate.

24.2     CERTIFICATES AND DETERMINATIONS

         Any certification or determination by a Finance Party of a rate or
         amount under this Agreement is, in the absence of manifest error,
         conclusive evidence of the matters to which it relates.

24.3     CALCULATIONS

         Interest and the fee payable under Clause 20.2 (Commitment fee) accrue
         from day to day and are calculated on the basis of the actual number of
         days elapsed and a year of 360 days, or, in the case of interest
         (including any applicable MLA Cost) payable on an amount denominated in
         Sterling only, 365 days.

25.      AMENDMENTS AND WAIVERS

25.1     PROCEDURE

         (a)      Subject to Clause 25.2 (Exceptions), any term of the Finance
                  Documents may be amended or waived with the agreement of the
                  Company and the Majority Banks. The Agent may effect, on
                  behalf of the Banks, an amendment to which they or the
                  Majority Banks have agreed.

         (b)      The Agent shall promptly notify the other Parties of any
                  amendment or waiver effected under paragraph (a) above, and
                  any such amendment or waiver shall be binding on all the
                  Parties.

25.2     EXCEPTIONS

(a)      An amendment or waiver which relates to:

         (i)      the definition of "Majority Banks" in Clause 1.1
                  (Interpretation);

         (ii)     an extension of the date for, or a decrease in an amount or a
                  change in the currency of, any payment under the Finance
                  Documents; or

         (iii)    an increase in a Bank's Commitment; or


                                     - 65 -
<PAGE>   68

         (iv)     the incorporation of additional borrowers otherwise than in
                  accordance with Clause 26.4 (Additional Borrowers); or

         (v)      a term of a Finance Document which expressly requires the
                  consent of each Bank; or

         (vi)     Clause 15 (Guarantee), Clause 17.7 (Pari passu ranking),
                  Clause 29 (Pro rata sharing) or this Clause 25 (Amendments and
                  waivers),

         may not be effected without the consent of each Bank.

(b)      An amendment or waiver which relates to the rights and/or obligations
         of the Agent may not be effected without the consent of the Agent.

25.3     WAIVERS AND REMEDIES CUMULATIVE

         The rights of each Finance Party under the Finance Documents:

         (a)      may be exercised as often as necessary;

         (b)      are cumulative and not exclusive of its rights under the
                  general law; and

         (c)      may be waived only in writing and specifically.

         Delay in exercising or non-exercise of any such right is not a waiver
         of that right.

26.      CHANGES TO THE PARTIES

26.1     TRANSFERS BY THE BORROWERS

         Neither the Company nor any other Borrower may assign, transfer,
         novate, or dispose of any of, or any interest in, its rights and/or
         obligations under this Agreement.

26.2     TRANSFERS BY BANKS

(a)      A Bank (the ("EXISTING BANK") may at any time assign, transfer or
         novate any of its rights and/or obligations under this Agreement and/or
         its Commitment to another bank or financial institution (the "NEW
         BANK") which is a Qualifying Lender and which complies with its
         obligations under Clause 11.3 (US tax forms) and Clause 11.4 (Other tax
         forms). If an Existing Bank transfers, assigns or novates its rights
         and obligations in respect of less than all its Commitment, the portion
         to which such transfer, assignment or novation relates must be equal to
         or greater than US$10,000,000. The prior consent of the Company is
         required for any such assignment, transfer or novation, unless:


                                     - 66 -
<PAGE>   69

         (i)      the New Bank is another Bank or an Affiliate of a Bank; or

         (ii)     an Event of Default is outstanding.

         However, the prior consent of the Company must not be unreasonably
         withheld or delayed and will be deemed to have been given if, within 14
         days of receipt by the Company of an application for consent, it has
         not been expressly refused.

(b) A transfer of obligations will be effective only if either:

         (i)      the obligations are novated in accordance with Clause 26.3
                  (Procedure for novations); or

         (ii)     the New Bank confirms to the Agent and the Company that it
                  undertakes to be bound by the terms of this Agreement as a
                  Bank in form and substance satisfactory to the Agent. On the
                  transfer becoming effective in this manner the Existing Bank
                  shall be relieved of its obligations under this Agreement to
                  the extent that they are transferred to the New Bank.

(c)      Nothing in this Agreement restricts the ability of a Bank to
         sub-contract an obligation if that Bank remains liable under this
         Agreement for that obligation.

(d)      On each occasion an Existing Bank assigns, transfers or novates any of
         its rights and/or obligations under this Agreement, the New Bank shall,
         on the date the assignment, transfer and/or novation takes effect, pay
         to the Agent for its own account a fee of (pound)750.

(e) An Existing Bank is not responsible to a New Bank for:

         (i)      the execution genuineness, validity, enforceability or
                  sufficiency of any Finance Document or any other document;

         (ii)     the collectability of amounts payable under any Finance
                  Document; or

         (iii)    the accuracy of any statements (whether written or oral) made
                  in or in connection with any Finance Document.

(f)      Each New Bank confirms to the Existing Bank and the other Finance
         Parties that it:

         (i)      has made its own independent investigation and assessment of
                  the financial condition and affairs of the Company and its
                  related entities in connection with its participation in this
                  Agreement and has not relied exclusively on 


                                     - 67 -
<PAGE>   70

                  any information provided to it by the Existing Bank in
                  connection with any Finance Document; and

         (ii)     will continue to make its own independent appraisal of the
                  creditworthiness of the Company and its related entities while
                  any amount is or may be outstanding under this Agreement or
                  any Commitment is in force.

(g)      Nothing in any Finance Document obliges an Existing Bank to:

         (i)      accept a re-transfer from a New Bank of any of the rights
                  and/or obligations assigned, transferred or novated under this
                  Clause; or

         (ii)     support any losses incurred by the New Bank by reason of the
                  non-performance by the Company of its obligations under this
                  Agreement or otherwise.

(h)      Any reference in this Agreement to a Bank includes a New Bank, but
         excludes a Bank if no amount is or may be owed to or by that Bank under
         this Agreement and its Commitment has been cancelled or reduced to nil.

(i)      If, at the time of any transfer, novation or assignment by a Bank or of
         any change of Facility Office, circumstances exist which would oblige a
         Borrower to pay to the New Bank or assignee (or, in the case of a
         change of Facility Office, the relevant Bank) under Clause 11 (Taxes),
         13 (Increased costs) or 14 (illegality) any sum in excess of the sum
         (if any) which it would have been obliged to pay to that Bank under the
         relevant Clause in the absence of that transfer, novation, assignment
         or change, that Borrower shall not be obliged to pay that excess.

26.3     PROCEDURE FOR NOVATIONS

(a)      A novation is effected if:

         (i)      the Existing Bank and the New Bank deliver to the Agent a duly
                  completed certificate, substantially in the form of Part I of
                  Schedule 5 (a "NOVATION CERTIFICATE"),

         (ii)     the Agent executes it; and

         (iii)    the novation is in accordance with Clause 26.2(a) (Transfers
                  by Banks).

(b)      Each party (other than the Existing Bank and the New Bank) irrevocably
         authorises the Agent to execute any duly completed Novation Certificate
         on its behalf.


                                     - 68 -
<PAGE>   71

(c)      To the extent that they are expressed to be the subject of the novation
         in the Novation Certificate:

         (i)      the Existing Bank and the other Parties (the "EXISTING
                  PARTIES") will be released from their obligations to each
                  other (the "DISCHARGED OBLIGATIONS");

         (ii)     the New Bank and the existing Parties will assume obligations
                  towards each other which differ from the discharged
                  obligations only insofar as they are owed to or assumed by the
                  New Bank instead of the Existing Bank;

         (iii)    the rights of the Existing Bank against the existing Parties
                  and vice versa (the "DISCHARGED RIGHTS") will be cancelled;
                  and

         (iv)     the New Bank and the existing Parties will acquire rights
                  against each other which differ from the discharged rights
                  only insofar as they are exercisable by or against the New
                  Bank instead of the Existing Bank,

         all on the date of execution of the Novation Certificate by the Agent
         or, if later, the date specified in the Novation Certificate.

26.4     ADDITIONAL BORROWERS

(a)      If the Company wishes one of its wholly-owned Subsidiaries to become an
         Additional Borrower, then it may (with the prior consent of the Agent
         acting on the instructions of the Majority Banks) deliver to the Agent
         the documents listed in Part II of Schedule 2.

(b)      On delivery of a Borrower Accession Agreement, executed by the relevant
         Subsidiary and the Company, the Subsidiary concerned will become an
         Additional Borrower. However, it may not utilise the Facility until the
         Agent confirms to the other Finance Parties and the Company that it has
         received all the documents referred to in paragraph (a) above in form
         and substance satisfactory to it.

(c)      Delivery of a Borrower Accession Agreement, executed by the relevant
         Subsidiary and the Company, constitutes confirmation by that Subsidiary
         and the Company that the representations and warranties set out in
         Clause 16 (Representations and warranties) and to be made by them on
         the date of the Borrower Accession Agreement under, in the case of the
         relevant Subsidiary, sub-paragraph (a)(ii) and in the case of the
         Company, paragraph (b) of Clause 16.14 (Times for making
         representations and warranties) are correct, as if made with reference
         to the facts and circumstances then existing.


                                     - 69 -
<PAGE>   72

(d)      If at any time a Borrower (other than the Company) is under no payment
         obligation under this Agreement, the Company and that Borrower may
         declare that that Borrower shall cease to be a Borrower under this
         Agreement by delivery to the Agent of a Borrower Cessation Notice. On
         delivery of that Borrower Cessation Notice, that Borrower shall
         forthwith cease to be a Borrower.

26.5     REFERENCE BANKS

         If a Reference Bank (or, if a Reference Bank is not a Bank, the Bank of
         which it is an Affiliate) ceases to be one of the Banks, the Agent
         shall (in consultation with the Company) appoint another Bank or an
         Affiliate of a Bank to replace that Reference Bank.

26.6     REGISTER

         The Agent shall keep a register of all the Parties and shall supply any
         other Party (at that Party's expense) with a copy of the register on
         request.

27.      DISCLOSURE OF INFORMATION

(a)      A Bank may disclose to an Affiliate or any person with whom it is
         proposing to enter, or has entered into, any kind of transfer,
         participation or other agreement in relation to this Agreement:

         (i)      a copy of any Finance Document; and

         (ii)     any information which that Bank has acquired under or in
                  connection with any Finance Document;

         provided that any such Affiliate or person has agreed in writing to
         maintain the confidentiality of any such document or information on the
         same terms (with the appropriate consequential changes) as are set out
         in paragraph (b) below.

(b)      Subject to paragraph (a) above, each Bank shall keep confidential and
         not, without the prior written consent of the Company, use any
         information (other than information which is publicly available other
         than as a result of a breach of this paragraph (b)) supplied by or on
         behalf of any Borrower under this Agreement otherwise than in
         connection with this Agreement. However, each Bank is entitled to
         disclose information:

         (i)      in connection with any legal proceedings arising out of or in
                  connection with this Agreement; or


                                     - 70 -
<PAGE>   73

         (ii)     if requited to do so by an order of a court of competent
                  jurisdiction whether in pursuance of any procedure for
                  discovering documents or otherwise; or

         (iii)    pursuant to any law or regulation in accordance with which
                  that Bank is required to act; or

         (iv)     to any governmental, banking or taxation authority of
                  competent jurisdiction; or

         (v) to its auditors or legal or other professional advisers.

28.      SET-OFF

         A Finance Party may set off any matured obligation owed by a Borrower
         under this Agreement (to the extent beneficially owned by that Finance
         Party) against any obligation, whether or not matured (provided that a
         Bank may only exercise rights of set off against an unmatured
         obligation owed by it after an Event of Default has occurred), owed by
         that Finance Party to that Borrower, regardless of the place of
         payment, booking branch or currency of either obligation. If the
         obligations are in different currencies, the Finance Party may convert
         either obligation at a market rate of exchange in its usual course of
         business for the purpose of the set-off. If either obligation is
         unliquidated or unascertained, the Finance Party may, after an Event of
         Default his occurred, set off in an amount estimated by it in good
         faith to be the amount of that obligation. The relevant Finance Party
         shall promptly notify the Company of any set off pursuant to this
         Clause 28 (Set-off). Nothing in this Clause 28 (Set-off) shall be
         effective to create a charge.

29.      PRO RATA SHARING

29.1     REDISTRIBUTION

         If any amount owing by a Borrower under this Agreement to a Finance
         Party (the "RECOVERING FINANCE PARTY") is discharged by payment,
         set-off or any other manner other than through the Agent in accordance
         with Clause 10 (Payments) (a "RECOVERY"), then:

         (a)      the recovering Finance Party shall, within 3 Business Days,
                  notify details of the recovery to the Agent;

         (b)      the Agent shall determine whether the recovery is in excess of
                  the amount which the recovering Finance Party would have
                  received had the recovery


                                     - 71 -
<PAGE>   74

                  been received by the Agent and distributed in accordance with
                  Clause 10 (Payments);

         (c)      subject to Clause 29.3 (Exceptions), the recovering Finance
                  Party shall, within 5 Business Days of demand by the Agent,
                  pay to the Agent an amount (the "REDISTRIBUTION") equal to the
                  excess;

         (d)      the Agent shall treat the redistribution as if it were a
                  payment by the relevant Borrower under Clause 10 (Payments)
                  and shall pay the redistribution to the Finance Parties (other
                  than the recovering Finance Party) in accordance with Clause
                  10.7 (Partial payments); and

         (e)      after payment of the full redistribution, the recovering
                  Finance Party will be subrogated to the portion of the claims
                  paid under paragraph (d) above, and the Company will owe the
                  recovering Finance Party a debt which is equal to the
                  redistribution, immediately payable and of the type originally
                  discharged.

29.2     REVERSAL OF REDISTRIBUTION

         If under Clause 29.1 (Redistribution):

         (a)      a recovering Finance Party must subsequently return a
                  recovery, or an amount measured by reference to a recovery, to
                  a Borrower; and

         (b)      the recovering Finance Party has paid a redistribution in
                  relation to that recovery,

         each Finance Party shall, within 3 Business Days of demand by the
         recovering Finance Party through the Agent, reimburse the recovering
         Finance Party all or the appropriate portion of the redistribution paid
         to that Finance Party. Thereupon, the subrogation in Clause 29.1(e)
         (Redistribution) will operate in reverse to the extent of the
         reimbursement.

29.3     EXCEPTIONS

(a)      A recovering Finance Party need not pay a redistribution to the extent
         that it would not, after the payment, have a valid claim against the
         relevant Borrower in the amount of the redistribution pursuant to
         Clause 29.1(e) (Redistribution).

(b)      Where a recovering Finance Party has received a recovery as a
         consequence of the satisfaction or enforcement of a judgment obtained
         in any legal action or proceedings to which it is a party, it need not
         pay a redistribution to any Finance Party which (being entitled to do
         so) did not join in with the recovering Finance 


                                     - 72 -
<PAGE>   75

         Party in the legal action or proceedings, unless the recovering Finance
         Party did not give prior notice of its involvement in the legal action
         or proceedings to the Agent for disclosure to all the Banks.

30.      SEVERABILITY

         If a provision of any Finance Document is or becomes illegal, invalid
         or unenforceable in any jurisdiction, that shall not affect:

         (a)      the legality, validity or enforceability in that jurisdiction
                  of any other provision of the Finance Documents; or

         (b)      the legality, validity or enforceability in other
                  jurisdictions of that or any other provision of the Finance
                  Documents.

31.      COUNTERPARTS

         This Agreement may be executed in any number of counterparts, and this
         has the same effect as if the signatures on the counterparts were on a
         single copy of this Agreement.

32.      NOTICES

32.1     GIVING OF NOTICES

         All notices or other communications under or in connection with this
         Agreement shall be given in writing or by telex or facsimile. Any such
         notice will be deemed to be given as follows:

         (a)      if in writing, when delivered;

         (b)      if by telex when dispatched, but only if, at the time of
                  transmission, the correct answerback appears at the start and
                  at the end of the sender's copy of the notice; and

         (c)      if by facsimile, when received in a legible form.

         However, a notice given in accordance with the above but received on a
         non-working day or after business hours in the place of receipt will
         only be deemed to be given on the next working day in that place.

32.2     ADDRESSES FOR NOTICES

(a)      The address, telex number and facsimile number of each Party (other
         than the Agent) for all notices under or in connection with this
         Agreement are:


                                     - 73 -
<PAGE>   76

         (i)      that notified by that Party for this purpose to the Agent on
                  or before it becomes a Party; or

         (ii)     any other notified by that Party for this purpose to the Agent
                  by not less than five Business Days' notice.

(b) The address, telex number and facsimile number of the Agent is:

         For the attention of Loans Agency Department
         1 High Timber Street
         London EC4V 3SB
         Telex no:         887434
         Fax no:           0171-711 3861

         or such other address, telex number or facsimile number as the Agent
         may notify to the other Parties for this purpose by not less than five
         Business Days' notice.

(c)      The Agent shall, promptly upon request from any Party, give to that
         Party the address, telex number or facsimile number of any other Party
         applicable at the time for the purposes of this Clause. The Agent shall
         deliver a copy of any notice to a Borrower (other than the Company) to
         the Company.

33.      LANGUAGE

(a)      Any notice given under or in connection with any Finance Document shall
         be in English.

(b)      All other documents provided under or in connection with any Finance
         Document shall be:

         (i)      in English; or

         (ii)     if not in English, accompanied by a certified English
                  translation (except for the audited accounts of Deutsche Siebe
                  GmbH) and, in this case, the English translation shall prevail
                  unless the document is a statutory or other official document.

34.      JURISDICTION

34.1     SUBMISSION

(a)      For the benefit of each Finance Party, each Borrower agrees that the
         courts of England have jurisdiction to settle any disputes in
         connection with any Finance Document and accordingly submits to the
         jurisdiction of the English courts.


                                     - 74 -
<PAGE>   77

(b)      Without prejudice to paragraph (a) above, Siebe Inc. and any other US
         Borrower agrees that any New York State or Federal court sitting in
         New York City shall have jurisdiction to settle any disputes in
         connection with any Finance Document and accordingly submits to the
         jurisdiction of those courts.

34.2     SERVICE OF PROCESS

         Without prejudice to any other mode of service, each Borrower (other
         than a Borrower incorporated in England and Wales):

         (a)      irrevocably appoints the Company as its agent for service of
                  process relating to any proceedings before the English courts
                  in connection with any Finance Document;

         (b)      agrees that failure by a process agent to notify the Borrower
                  of the process will not invalidate the proceedings concerned;
                  and

         (c)      consents to the service of process relating to any such
                  proceedings by prepaid posting of a copy of the process to its
                  address for the time being applying under Clause 32.2.
                  (Addresses for notices).

34.3     FORUM CONVENIENCE AND ENFORCEMENT ABROAD

         Each Borrower:

         (a)      waives objection to the English or New York courts on grounds
                  of inconvenient forum or otherwise as regards proceedings in
                  connection with a Finance Document; and

         (b)      agrees that a judgment or order of an English court in
                  connection with a Finance Document is conclusive and binding
                  on it and may be enforced against it in the courts of any
                  other jurisdiction.

34.4     NON-EXCLUSIVITY

         Nothing in this Clause 34 limits the right of a Finance Party to bring
         proceedings against a Borrower in connection with any Finance Document:

         (a)      in any other court of competent jurisdiction; or

         (b)      concurrently in more than one jurisdiction.


                                     - 75 -
<PAGE>   78

35.      GOVERNING LAW

         This Agreement is governed by English law.

This     Agreement has been entered into on the date stated at the beginning of
         this Agreement.


                                     - 76 -
<PAGE>   79

                                   SCHEDULE 1

                              BANKS AND COMMITMENTS



<TABLE>
<CAPTION>
Banks                                                                                               COMMITMENTS
                                                                                                        US$
<S>                                                                                                 <C>
SENIOR LEAD MANAGERS
Bankers Trust Company                                                                               60,000,000
National Westminster Bank Plc                                                                       60,000,000
Swiss Bank Corporation                                                                              60,000,000
The Bank of Tokyo, Ltd.                                                                             60,000,000
Bayerische Landesbank Girozentrale, London Branch                                                   60,000,000
CIBC Wood Gundy Ireland Ltd                                                                         60,000,000
Commerzbank Aktiengesellschaft, London Branch                                                       60,000,000
Den Danske Bank Aktieselskab                                                                        60,000,000
The Fuji Bank, Limited                                                                              60,000,000
Lloyds Bank Plc                                                                                     60,000,000
Midland Bank plc                                                                                    60,000,000
Westdeutsche Landesbank Girozentrale, London Branch                                                 60,000,000

LEAD MANAGERS

Bank Brussels Lambert London                                                                        40,000,000
Banque Nationale de Paris London Branch                                                             40,000,000
Barclays Bank PLC                                                                                   40,000,000
Chemical Bank                                                                                       40,000,000
The First National Bank of Boston                                                                   40,000,000
Mellon Bank N.A.                                                                                    40,000,000
Morgan Guaranty Trust Company of New York                                                           40,000,000
The Sanwa Bank, Limited                                                                             40,000,000
Standard Chartered Bank                                                                             40,000,000
The Sumitomo Bank, Limited                                                                          40,000,000
The Toronto-Dominion Bank                                                                           40,000,000

MANAGERS

ABN AMRO Bank N.V.                                                                                  20,000,000
Banca Commerciale Italiana SpA, London Branch                                                       20,000,000
Banca Nazionale del Lavoro SpA, London Branch                                                       20,000,000
Banco Exterior de Espana S.A. - London Branch                                                       20,000,000
Bank of Montreal                                                                                    20,000,000
The Bank of Nova Scotia                                                                             20,000,000
Bayerische Vereinsbank Aktiengesellschaft, London Branch                                            20,000,000
Comerica Bank                                                                                       20,000,000
Credit Lyonnais                                                                                     20,000,000
</TABLE>


                                     - 77 -
<PAGE>   80
<TABLE>
<S>                                                                                           <C>
Credit Suisse                                                                                       20,000,000
Deutsche Bank AG London                                                                             20,000,000
Fleet Bank of Massachusetts, N.A.                                                                   20,000,000
The Mitsubishi Bank, Limited                                                                        20,000,000
Nomura Bank International plc                                                                       20,000,000
Svenska Handelsbanken (publ)                                                                        20,000,000
The Tokai Bank, Limited                                                                             20,000,000
Wachovia Bank of Georgia, N.A.                                                                      20,000,000


                                                                                                 -------------
                                                                      Total Commitments       US$1,500,000,000
                                                                                                 -------------
</TABLE>



                                     - 78 -
<PAGE>   81

                                   SCHEDULE 2

                         CONDITIONS PRECEDENT DOCUMENTS

                                     PART I

                      TO BE DELIVERED BEFORE THE FIRST LOAN



1.       All Borrowers

         A copy of the memorandum and articles of association and certificate of
         incorporation or other constitutional documents of each Borrower.

2.       Company

(a)      A copy of a resolution of the board of directors of the Company:

         (i)      approving the terms of, and the transactions contemplated by,
                  this Agreement and resolving that it execute this Agreement
                  and the Fee Letters;

         (ii)     authorising a specified person or persons to execute this
                  Agreement and the Fee Letters on its behalf, and

         (iii)    authorising a specified person or persons, on its behalf, to
                  sign and/or despatch all other documents and notices to be
                  signed and/or despatched by it under or in connection with
                  this Agreement:

(b)      a specimen of the signature of each person authorised by the resolution
         referred to in paragraph (a) above;

(c)      a certificate of a director of the Company confirming that utilisation
         of the Facility in full would not cause any borrowing limit binding on
         it to be exceeded; and

(d)      a certificate of an authorised signatory of the Company certifying that
         each copy document specified in Part I of this Schedule 2 (other than
         paragraph 4 below) is correct, complete and in full force and effect as
         at a date no earlier than the date of this Agreement.

3.       Original Borrowers

(a)      A copy of a resolution of the board of directors of Siebe Inc.:


                                     - 79 -
<PAGE>   82

         (i)      approving the terms of, and the transactions contemplated by,
                  this Agreement and resolving that it execute this Agreement;

         (ii)     authorising a specified person or persons to execute this
                  Agreement on its behalf; and

         (iii)    authorising a specified person or persons, on its behalf, to
                  sign and/or despatch all other documents and notices to be
                  signed and/or despatched by it under or in connection with
                  this Agreement;

(b)      a specimen of the signature of each person authorised by the resolution
         referred to in paragraph (a) above;

(c)      in respect of Deutsche Siebe GmbH, a legalised extract from the
         Commercial Registry of Bleldeld showing that the person or persons
         executing the Agreement on behalf of Deutsche Siebe GmbH are in fact
         Geschaftsfuhreur(s) with the proper signature authority; and

(d)      a certificate of a director of the relevant Borrower confirming that,
         in the case of Deutsche Siebe GmbH, utilisation of the Facility in full
         would not cause any borrowing limit binding on it to be exceeded and,
         in the case of Siebe Inc., Siebe Inc. will not utilise the Facility to
         the extent that it would cause any borrowing limit on it to be
         exceeded.

4.       Other documents

(a)      A letter from the Company to Swiss Bank Corporation and from Siebe Inc.
         to Bankers Trust Company as agents under the Existing Facilities
         confirming that all amounts owing under the Existing Facilities will be
         repaid or prepaid in full, and that all commitments will be cancelled
         in full, on the first proposed Drawdown Date.

(b)      A copy of any other authorisation or other document, opinion or
         assurance which the Agent considers to be necessary or desirable in
         connection with the entry into and performance of, and the transactions
         contemplated by, any Finance Document or for the validity and
         enforceability of any Finance Document.

5.       Legal opinions

(a)      A legal opinion of Fried, Frank. Harris, Shriver & Jacobson, legal
         advisers to the Company as to U.S. law;

(b)      a legal opinion of Hengeler Mueller Weitzel Wirtz, legal adviser to the
         Agent as to German law; and


                                     - 80 -
<PAGE>   83

(c)      a legal opinion of Allen & Overy, legal advisers to the Agent as to
         English law, in each case, addressed to the Finance Parties.




                                     - 81 -
<PAGE>   84

                                     PART II

                    TO BE DELIVERED BY AN ADDITIONAL BORROWER

(a)      A Borrower Accession Agreement, duly executed by the Additional
         Borrower and the company;

(b)      a copy of the memorandum and articles of association and certificate of
         incorporation or other constitutional documents of the Additional
         Borrower;

(c)      a copy of a resolution of the board of directors (or equivalent) of the
         Additional Borrower:

         (i)      approving the terms of, and the transactions contemplated by,
                  the Borrower Accession Agreement and resolving that it execute
                  the Borrower Accession Agreement;

         (ii)     authorising a specified person or persons to execute the
                  Borrower Accession Agreement on its behalf; and

         (iii)    authorising a specified person or persons, on its behalf, to
                  sign and/or despatch all other documents and notices to be
                  signed and/or despatched by it under or in connection with
                  this Agreement;

(d)      a certificate of a duly authorised officer of the Additional Borrower
         confirming that utilisation of the Facility in full would not cause any
         borrowing limit binding on it to be exceeded;

(e)      a copy of any other authorisation or other document, opinion or
         assurance which the Agent (acting reasonably) considers to be necessary
         in connection with the entry into and performance of, and the
         transactions contemplated by, the Borrower Accession Agreement or for
         the validity and enforceability of any Finance Document;

(f)      a specimen of the signature of each person authorised by the resolution
         referred to in paragraph (c) above;

(g)      the latest audited financial statements of the Additional Borrower;

(h)      a legal opinion of legal advisers to the Agent in the jurisdiction of
         incorporation of the Additional Borrower, addressed to the Finance
         Parties; and

(i)      a certificate of an authorised signatory of the Additional Borrower
         certifying that each copy document specified in paragraphs (b) and (c)
         of Part II of this Schedule 2 is correct, complete and in full force
         and effect as at a date no earlier than the date of the Borrower
         Accession Agreement.




                                     - 82 -
<PAGE>   85

                                   SCHEDULE 3

                           CALCULATION OF THE MLA COST


(a)      The MLA Cost for a Loan denominated in Sterling for each Interest
         Period for that Loan is calculated in accordance with the following
         formula:

                     BY + L(Y-X) + S(Y-Z) % per annum = MLA Cost
                     -------------------
                                 100-(B + S)

where on the day of application of the formula:

B        is the percentage of the Agent's eligible liabilities which the Bank of
         England then requires the Agent to hold on a non-interest-bearing
         deposit account in accordance with its cash ratio requirements;

Y        is the rate at which Sterling deposits are offered by the Agent to
         leading banks in the London interbank market at or about 11.00 am. on
         that day for the relevant period;

L        is the percentage of eligible liabilities which (as a result of the
         requirements of the Bank of England) the Agent maintains as secured
         money with members of the London Discount Market Association or in
         certain marketable or callable securities approved by the Bank of
         England, which percentage shall (in the absence of evidence that any
         higher figure is appropriate) be conclusively presumed to be 5%;

X        is the rate at which secured Sterling investments may be placed by the
         Agent with members of the London Discount Market Association at or
         about 11.00 a.m. on that day for the relevant period or if greater the
         rate at which Sterling bills of exchange (of a term or equal to the
         duration of the relevant period) eligible for rediscounting at the Bank
         of England can be discounted in the London Discount Market at or about
         11.00 am. on that day;

S        is the percentage of the Agent's eligible liabilities which the Bank of
         England then requires the Agent to place as a special deposit; and

Z        is the interest rate per annum allowed by the Bank of England on
         special deposits.

(b)      For the purposes of this Schedule 3:

         (i)      "ELIGIBLE LIABILITIES" and "SPECIAL DEPOSITS" have the
                  meanings given to them it the time of application of the
                  formula by the Bank of England;


                                     - 83 -
<PAGE>   86

         (ii)     "RELEVANT PERIOD" in relation to a Loan, means:

                  (A)     if its Term is 3 months or less, its Term; or

                  (B)     if its Term is more than 3 months, 3 months.

(c)      In the application of the formula, B, Y, 1, X, S and Z are included in
         the formula as figures and not as percentages, e.g. if B = 0.5% and Y =
         15 %. BY is calculated as 0.5 x 15.

(d)      (i)      The formula is applied on the first day of each Loan.

         (ii)     Each amount calculated in accordance with the formula is, if
                  necessary, rounded upward to four decimal places.

(e)      If the Agent determines that a change in circumstances has rendered, or
         will render, the formula inappropriate, the Agent (after consultation
         with the Banks) shall notify the Company of the manner in which the MLA
         Cost will subsequently be calculated. However, only such amendments may
         be made to the method of calculation as are necessary to the above
         formula so as to (and only so as to) restore the position in terms of
         overall return to that which prevailed before the relevant change
         occurred. The manner of calculation so notified by the Agent shall, in
         the absence of manifest error, be binding on all the Parties.





                                     - 84 -
<PAGE>   87

                                   SCHEDULE 4

                                 FORM OF REQUEST



To:       SWISS BANK CORPORATION as Agent

From:[                              ]                     Date:[               ]



             SIEBE PLC - US$1,500,000,000 REVOLVING CREDIT AGREEMENT
                            DATED 29TH NOVEMBER, 1995

<TABLE>
<S>      <C>                                    <C>
1.       We wish to borrow a Loan as follows:

         (a)      Drawdown Date:               [      ]

         (b)      Currency:                    [      ]

         (c)      Amount:                      [      ]

         (d)      Term:                        [      ] /alternative approved duration of Term:  [       ]*

         (e)      Payment Instructions:                       [      ].
</TABLE>

2.       We confirm that each condition specified in Clause 4.3 (Further
         conditions precedent) is satisfied on the date of this Request.

By:

[                 ]
Authorised Signatory


- --------
         *       Complete only if the requested Term is of an optional duration.




                                     - 85 -
<PAGE>   88

                                   SCHEDULE 5

                           FORM OF ACCESSION DOCUMENTS

                                     PART I

                          FORM OF NOVATION CERTIFICATE



To:      SWISS BANK CORPORATION as Agent

From: [THE EXISTING BANK] and [THE NEW BANK]                  Date:  [         ]

             SIEBE PLC - US$1,500,000,000 REVOLVING CREDIT AGREEMENT
                            DATED 29TH NOVEMBER, 1995

We refer to Clause 26.3 (Procedure for novations).

1.       We (the "EXISTING BANK") and [ ] (the "NEW BANK") agree to the Existing
         Bank and the New Bank novating all the Existing Bank's rights and
         obligations referred to in the Schedule in accordance with Clause 26.3
         (Procedure for novations).

2.       The specified date for the purposes of Clause 26.3(c) is [date of 
         novation].

3.       The Facility Office and address for notices of the New Bank for the
         purposes of Clause 32.2 (Addresses for notices) are set out in the
         Schedule.

4.       The New Bank makes its warranties under Clause 11.6 (Warranties by each
         Bank) on the date of this Novation Certificate and the date in
         paragraph 2 above.

5.       This Novation Certificate is governed by English law.






                                     - 86 -
<PAGE>   89

                                  THE SCHEDULE

                      RIGHTS AND OBLIGATIONS TO BE NOVATED

[Details of the rights and obligations of the Existing Bank to be novated].

[New Bank]

Facility Office                                Address for notices
[                               ]              [                               ]
[Existing Bank]                                [New Bank]

By:                                            By:

Date:                                          Date:

SWISS BANK CORPORATION
as agent for and on behalf of
itself and the other Parties

By:

Date:






                                     - 87 -
<PAGE>   90

                                     PART II

                          BORROWER ACCESSION AGREEMENT



To:       SWISS BANK CORPORATION as Agent

From:     [PROPOSED BORROWER] and SIEBE pic

                                                                          [Date]

             SIEBE PLC - US$1,500,000,000 REVOLVING CREDIT AGREEMENT
               DATED 29TH NOVEMBER, 1995 (THE "CREDIT AGREEMENT")

We refer to Clause 26.4 (Additional Borrowers).

[Name of company] of [Registered Office] ( ) (the "PROPOSED BORROWER") agrees to
become an Additional Borrower and to be bound by the terms of the Credit
Agreement as an Additional Borrower in accordance with Clause 26.4 (Additional
Borrowers).

The address for notices of the Proposed Borrower for the purposes of Clause 32.2
(Addresses for notices) is:

[

                                    ]

This Agreement is governed by English law.

By:

[PROPOSED BORROWER]
Authorised Signatory

By:

SIEBE plc
Authorised Signatory





                                     - 88 -
<PAGE>   91

                                    PART III

                        FORM OF BORROWER CESSATION NOTICE



To:        SWISS BANK CORPORATION as Agent

From:      [BORROWER] and SIEBE plc

                                                                          [Date]

             SIEBE PLC - US$1,500,000,000 REVOLVING CREDIT AGREEMENT
               DATED 29TH NOVEMBER, 1995 (THE "CREDIT AGREEMENT")

We refer to Clause 26.4 (Additional Borrowers) of the Credit Agreement.

[Borrower] is under no actual payment obligation under the Credit Agreement in
its capacity as a Borrower. Accordingly, pursuant to Clause 26.4(d) of the
Credit Agreement and with effect from the date of this notice, [Borrower] shall
cease to be a Borrower under the Credit Agreement.

This notice is governed by English law.



By:                                      By:

[BORROWER]                               SIEBE plc
Authorised Signatory                     Authorised Signatory




                                     - 89 -
<PAGE>   92

                                   SCHEDULE 6

                                    TIMETABLE



In this Schedule 6:

D-[x] = x Business Days before the relevant Drawdown Date

A = Agent

B = Bank


<TABLE>
<CAPTION>
                                                                                          TIME
                                                             ------------------------------------------------------
                                                              DOLLARS OR OPTIONAL      SIEBE INC.        SIEBE INC.
                                                              CURRENCY OTHER THAN       (APPROVED         (OPTIONAL
                                                                   STERLING             DURATION)         DURATION)
                                                             (BORROWERS OTHER THAN                                         STERLING
CLAUSE EVENT                                                      SIEBE INC.
- ------------                                                 ---------------------     ----------        ----------       ----------
<S>              <C>                                         <C>                       <C>               <C>              <C>
5.1              A receives Request                                  D-3                   D-3               D-4             D-1
                                                                  10.00 a.m.            3.30 p.m.         3.30 p.m.       10.00 a.m.
5.4              A notifies B's of details of Request                D-3                   D-3               D-4             D-1
                 and amount of each B's                           1.00 p.m.             5.30 p.m.         5.30 p.m.       1.00 p.m.
                 participation
5.5(b)           A receives objection by B to                        D-3                                     D-3             D-1
                 selection of a Term of optional                  4.00 p.m.                               9.30 a.m.       4.00 p.m.
                 duration
5.5(c)           A notifies Company and B's of the                   D-2                                     D-3              D
                 new Term                                         9.30 a.m.                               5.30 p.m.       9.30 a.m.
</TABLE>







                                     - 90 -
<PAGE>   93

                                   SCHEDULE 7

                                FACILITY OFFICES



SENIOR LEAD MANAGERS

Bankers Trust Company
1 Appold Street
Broadgate
London EC2A 2HE

Telephone:               0171-9822500
Telex:                   883341
Fax:                     0171-9821182

National Westminster Bank Plc
135 Bishopsgate
London EC2M 3UR

Telephone:               0171-3755014
Telex:                   882121
Fax:                     0171-3755967

(For non-US Borrowers)
Swiss Bank Corporation, London Branch
1 High Timber Street
London EC4 3SB

Telephone:               0171 711 3489
Telex:                   887434
Fax:                     0171 711 3861

(For US Borrowers)
Swiss Bank Corporation, New York Branch
222 Broadway
PO Box 395
Church Street Station
New York
New York  10008



                                     - 91 -
<PAGE>   94

Telephone:               001 212 574 3856
Telex:
Fax:                     001 212 574 4176

(For non-US Borrowers)
The Bank of Tokyo, Ltd.
12/15 Finsbury Circus
London EC2M 7BT

Telephone:               0171-216 1213
Telex:                   946178
Fax:                     0171-638 8470

(For US Borrowers)
The Bank of Tokyo, Ltd.
1251 Avenue of theAmericas
New York,
New York  10116-3138

Telephone:               001 202 463 0170
Telex:
Fax:                     001 201 413 8225

Bayerische Landesbank Girozentrale
London Branch
13/14 Appold Street
London EC2A 2AA

Telephone:               0171-247 0056
Telex:                   886437
Fax:                     0171-955 5173

CIBC Wood Gundy Ireland Ltd
Ormonde House
12 Lower Leeson Street
Dublin 2
Ireland

Telephone:               353 1 662 4400
Telex:
Fax:                     353 1 662 4371



                                     - 92 -
<PAGE>   95

Commerzbank Aktiengesellschaft
London Branch
Commerzbank House
PO Box 286
23 Austin Friars
London EC2P 2JD

Telephone:               0171 418 4807
Telex:                   8954308/9 CBKLDN G
Fax:                     0171 418 4870

Den Danske Bank Aktieselskab
75 King William Street
London EC4N 7DT

Telephone:               0171 410 4949
Telex:                   896229/896220
Fax:                     0171 283 9526

(For non-US Borrowers)
The Fuji Bank, Limited
River Plate House
7-11 Finsbury Circus
London EC2M 7DH

Telephone:               0171 588 2211
Telex:                   886352/886317FUJIBK G
Fax:                     0171 588 1400

(For US Borrowers)
The Fuji Bank (Luxembourg) S.A.
29 Avenue de la Porte-Neuve 2227
Luxembourg B.P. 894
2018 Luxembourg

Telephone:               00 352 47 4681
Telex:                   3213
Fax:                     00 352 474688



                                     - 93 -
<PAGE>   96

Lloyds Bank Plc
Corporate Banking and Treasury Division
Bank House
Wine Street
Bristol BS1 2AN

Telephone:               0117-923-3476
Telex:                   888301 LOYDLN
Fax:                     0117-923 3367

Midland Bank plc
Midland Corporate Banking
27-32 Poultry
London EC2P 2BX

Telephone:               0171-2604157
Telex:                   8812288
Fax:                     0171-2604227

Westdeutsche Landesbank Girozentrale
London Branch
51 Moorgate
London EC2R 6AE

Telephone:               0171-6386141
Telex:                   88798415
Fax:                     0171-374 8546

LEAD MANAGERS

(For non-US Borrowers)
Bank Brussels Lambert London
6 Broadgate
London EC2M 2AJ

Telephone:               0171 2475566
Telex:                   884979
Fax:                     0171 247 1277

(For US Borrowers)
BBL International (UK) Limited
6 Broadgate
London EC2M 2AJ



                                     - 94 -
<PAGE>   97

Telephone:               0171 2475566
Telex:                   884979
Fax:                     0171 247 1277

Banque Nationale de Paris London Branch
8/13 King William Street
London EC4N 7QJ

Telephone:               0171-895-7070
Telex:                   883412 BNPLNX G
Fax:                     0171-929 0310

Barclays Bank PLC
Murray House
1 Royal Mint Court
London EC3N

Telephone:               0171 488 1144
Telex:
Fax:                     0171 696 2929

Chemical Bank
125 London Wall
London EC2Y 5AJ

Telephone:               0171 777 3629
Telex:                   940 60000 CBC G
Fax:                     0171-777 4745

The First National Bank of Boston
39 Victoria Street
London SW1H 0ED

Telephone:               0171 932 9057
Telex:                   886705/885125
Fax:                     0171 932 9364

Mellon Bank NA
Princess House
1 Suffolk Lane
London EC4R 0AN



                                     - 95 -
<PAGE>   98

Telephone:               0171 626 9828
Telex:                   885962
Fax:                     0171 454 0092

Morgan Guaranty Trust Company of New York
PO Box 161
60 Victoria Embankment
London EC4Y 0JP

Telephone:               0171-325-5767
Telex:                   896631 MGT G
Fax:                     0171-325 8276

(For non-US Borrowers)
The Sanwa Bank, Limited
PO Box 36
City Place House
55 Basinghall Street
London EC2V 5DL

Telephone:               0171 330 5000
Telex:                   888350
Fax:                     0171 330 5555

(For US Borrowers)
The Sanwa Bank, Limited
Georgia-Pacific Center,
Suite 4750
133 Peachtree Street, N.E.
Atlanta
Georgia 30303
U.S.A.

Telephone:               001 404 586-6880
Telex:                   ITT 4611830
Fax:                     001 404 589-1629

Standard Chartered Bank
27 Gracechurch Street
London EC3V 0BX



                                     - 96 -
<PAGE>   99

Telephone:               0171 280 7621
Telex:                   885951
Fax:                     0171 280 7611

(For non-US Borrowers)
The Sumitomo Bank, Limited
Temple Court
11 Queen Victoria Street
London EC4N 4TA

Telephone:               0171-7861000
Telex:                   887667
Fax:                     0171-2360049

(For US Borrowers)
The Sumitomo Bank, Limited
277 Park Avenue
New York, NY  10172
USA

Telephone:               00 1 212 224 4000
Telex:                   420515 (ITT)
Fax:                     00 1 212 593-9522

The Toronto-Dominion Bank
Triton Court
14/18 Finsbury Square
London EC2A 1DB

Telephone:               0171 282 8255
Telex:                   886142
Fax:                     0171 638 2251

MANAGERS

ABN AMRO Bank N.V.
101 Moorgate
London EC2M 6SB

Telephone:               0171 628 7766
Telex:                   887366
Fax:                     0171 588 2975



                                     - 97 -
<PAGE>   100

Banca Commerciale Italiana SpA
London Branch
42 Gresham Street
London EC2V 7LA

(For non-US Borrowers)
Banca Nazionale del Lavoro SpA
London Branch
Fitzwilliam House
10 St. Mary Axe
London EC3A 8NA

Telephone:               0171-337 2400
Telex:                   888094
Fax:                     0171-929 7983

(For US Borrowers)
Banca Nazionale del Lavoro SpA
London Branch
Fitzwiliam House
London Branch
10 St. Mary Axe
London EC3A 8NA

Telephone:               0171-337 2400
Telex:                   888094
Fax:                     0171-929 7983

(For US Borrowers)
Banca Nazionale del Lavoro SpA
25 West 51st Street
New York
NY 10019
USA

Telephone:               00 1 212 581 0710
Telex:                   62840
Fax:                     00 1 212 765 2978

(For non-US Borrowers)
Banco Exterior de Espana S.A.
1 Great Tower Street
London EC3R 5AH



                                     - 98 -
<PAGE>   101

Telephone:               0171 623 3404
Telex:                   886820 BELCO G
Fax:                     0171 623 3235

(For US Borrowers)
Banco Exterior de Espana S.A. - London Branch
320 Park Avenue
20th Floor
New York
New York   10022

Telephone:               001 2126059800
Telex:                   4964640 BEX NYC
Fax:                     00 12127554211

Bayerische Vereinsbank Aktiengesellschaft
London Branch
1 Royal Exchange Buildings
London EC3V 3LD

Telephone:               0171-6261301
Telex:                   889196
Fax:                     0171-6969989

Comerica Bank
500 Woodward Avenue
Detroit
Michigan
USA 48226-3329

Telephone:               00 13132224473
Telex:                   164366
Fax:                     00 1 3139644765

Credit Lyonnais
84-94 Queen Victoria Street
London EC4P 4LX

Telephone:               0171-6348000
Telex:                   885479
Fax:                     0171-4891559



                                     - 99 -
<PAGE>   102

(From 11.12.95)
Credit Lyonnais
PO Box 81
Broadwalk House
5 Appold Street
London EC2A 2JP

Telephone:               0171-3744014
Telex:                   885479
Fax:                     0171-2147070

(For non-US Borrowers)
Credit Suisse
Five Cabot Square
London E14 4QR

Telephone:               01718888000
Telex:                   887322 CREDSU G
Fax:                     01718888395

(For US Borrowers)
Credit Suisse
PO Box 3700
Church Street Station
New York 10008
USA

Telephone:               001 212 238 5081
Telex:                   420149/420232/420491
Fax:                     0012122385389

Deutsche Bank AG London
6 Bishopsgate
London EC2P 2AT

Telephone:               01719717000
Telex:                   9401555
Fax:                     01719717455

(For non-US Borrowers)
Fleet Bank of Massachusetts, N.A.
40/41 St. Andrew's Hill
London EC4V 6DE



                                    - 100 -
<PAGE>   103

Telephone:               01712489531
Telex:                   -
Fax:                     01713349456

(For US Borrowers)
Fleet Bank of Massachusetts, N.A.
75 State Street
Boston, MA 02109
USA

Telephone:               00 1 6173461577
Telex:                   -
Fax:                     00 16173461679

The Mitsubishi Bank, Limited
6 Broadgate
London EC2M 2SX

Telephone:               01716382222
Telex:                   8958931 BISHBK G
Fax:                     01713340140

Nomura Bank International plc
Nomura House
1 St. Martin's le Grand
London EC1A 4NP

Telephone:               01719292366
Telex:                   9413063/4 NBI G
Fax:                     0171-626-0851

Svenska Handelsbanken (publ)
Svenska House
3-5 Newgate Street
London EC1A 7DA

Telephone:               01713294467
Telex:                   894716
Fax:                     01713290654



                                    - 101 -
<PAGE>   104

(For non-US Borrowers)
The Tokai Bank, Limited
One Exchange Square
London EC2A 2EH

Telephone:               01714968000
Telex:                   887375
Fax:                     01716381144

(For US Borrowers)
The Tokai Bank, Limited
Park Avenue Plaza
55 East 52nd Street
New York
NY 10055
USA

Telephone:               00 12123391200
Telex:                   422857
Fax:                     00 12127542153

Wachovia Bank of Georgia, N.A.
International Division
191 Peachtree Street, N.E.
Atlanta
Georgia 30303
USA

Telephone:               001-404-332-5900
Telex:                   -
Fax:                     001-404-332-5905





                                    - 102 -
<PAGE>   105

                                  SIGNATORIES


COMPANY

SIEBE plc

    /s/ E.B. STEPHENS 
- ---------------------------
By:  E.B. STEPHENS



ORIGINAL BORROWERS:

SIEBE INC.

    /s/ E.B. STEPHENS 
- ---------------------------
By:  E.B. STEPHENS


DEUTSCHE SIEBE GmbH

    /s/ E.B. STEPHENS 
- ---------------------------
By:  E.B. STEPHENS



ARRANGERS

BANKERS TRUST COMPANY

      /s/  K.L. Brown 
- ---------------------------
By:  K.L. Brown


NATWEST CAPITAL MARKETS LIMITED

     /s/ M.W.A. VENN
- ---------------------------
By:  M.W.A. VENN


SBC WARBURG, A DIVISION OF SWISS BANK CORPORATION

     /s/ D.M.M. BEEVER
- ---------------------------
By:  D.M.M. BEEVER



BANKS

BANKERS TRUST COMPANY

      /s/ K.L. BROWN
- ---------------------------
By:  K.L. BROWN





                                    - 103 -
<PAGE>   106

NATIONAL WESTMINSTER BANK PLC

    /s/ ROGER W. BYATT
- ---------------------------
By:  ROGER W. BYATT


SWISS BANK CORPORATION

    /s/ D.M.M. BEEVER
- ---------------------------
By:  D.M.M. BEEVER


THE BANK OF TOKYO, LTD.

    /s/ ANDREW E. LEE
- ---------------------------
By:  ANDREW E. LEE


BAYERISCHE LANDESBANK GIROZENTRALE, LONDON BRANCH

    /s/ CAROLINE POWELL            /s/ HEREWARD DRUMMON  
- ---------------------------      -------------------------
By:  CAROLINE POWELL             HEREWARD DRUMMON


CIBC WOOD GUNDY IRELAND LTD

      /s/ IAN BROWN
- ---------------------------
By:  IAN BROWN (BY POWER OF ATTORNEY)


COMMERZBANK AKTIENGESELLSCHAFT, LONDON BRANCH

      /s/ IAN BROWN
- ---------------------------
By:  IAN BROWN (BY POWER OF ATTORNEY)


DEN DANSKE BANK AKTIESELSKAB

      /s/ IAN BROWN
- ---------------------------
By:  IAN BROWN (BY POWER OF ATTORNEY)


THE FUJI BANK, LIMITED

     /s/ KEIJI TAKADA
- ---------------------------
By:  KEIJI TAKADA


FUJI BANK (LUXEMBOURG) S.A.

     /s/ KEIJI TAKADA
- ---------------------------
By:  KEIJI TAKADA


LLOYDS BANK PLC

  /s/ RICHARD D.C. DAKIN
- ---------------------------
By:  RICHARD D.C. DAKIN






                                    - 104 -
<PAGE>   107

MIDLAND BANK PLC

    /s/ PHILIP MILLS
- ---------------------------
By:  PHILIP MILLS


WESTDEUTSCHE LANDESBANK GIROZENTRALE, LONDON BRANCH

  /s/ ROBIN D.C. ARNOLD            /s/ BUBLITZ
- ---------------------------   ---------------------------    
By:  ROBIN D.C. ARNOLD                 BUBLITZ


BANK BRUSSELS LAMBERT LONDON

      /s/ IAN BROWN
- ---------------------------
By:  IAN BROWN (BY POWER OF ATTORNEY)


BBL INTERNATIONAL (UK) LIMITED

      /s/ IAN BROWN
- ---------------------------
By:  IAN BROWN (BY POWER OF ATTORNEY)


BANQUE NATIONALE DE PARIS LONDON BRANCH

      /s/ IAN BROWN
- ---------------------------
By:  IAN BROWN (BY POWER OF ATTORNEY)


BARCLAYS BANK PLC

     /s/ A.H.F. RIGBY
- ---------------------------
By:  A.H.F. RIGBY


CHEMICAL BANK

   /s/ DAVID A. BROWNE
- ---------------------------
By:  DAVID A. BROWNE


THE FIRST NATIONAL BANK OF BOSTON

 /s/ DAMARIS G. ALBARRAN
- ---------------------------
By:  DAMARIS G. ALBARRAN


MELLON BANK N.A.

 /s/ KEITH R.C. BRACKLEY
- ---------------------------
By:  KEITH R.C. BRACKLEY


MORGAN GUARANTY TRUT COMPANY OF NEW YORK

    /s/ SOHAIL A. RASUL
- ---------------------------
By:  SOHAIL A. RASUL



                                    - 105 -
<PAGE>   108

THE SANWA BANK, LIMITED

     /s/ P.B. LUCAS
- ---------------------------
By:  P.B. LUCAS


STANDARD CHARTERED BANK

      /s/ IAN BROWN
- ---------------------------
By:  IAN BROWN (BY POWER OF ATTORNEY)


THE SUMITOMO BANK, LIMITED

     /s/ M.D.R. MOORE
- ---------------------------
By:  M.D.R. MOORE


THE TORONTO-DOMINION BANK

     /s/ M.J. DALY
- ---------------------------
By:  M.J. DALY


ABN AMRO BANK N.V.

    /s/ C.M. MACDONALD
- ---------------------------
By:  C.M. MACDONALD


BANCA COMMERCIALE ITALIANA SPA

      /s/ C.A. PIPER
- ---------------------------
By:  C.A. PIPER


BANCA NAZIONALE DEL LAVORO SPA

       /s/ G. MARRA              /s/ PAUL MITCHELL
- ---------------------------   ---------------------------
By:  G. MARRA                         PAUL MITCHELL


BANCO EXTERIOR DE ESPANA S.A. - LONDON BRANCH

      /s/ IAN BROWN
- ---------------------------
By:  IAN BROWN (BY POWER OF ATTORNEY)


BANK OF MONTREAL

     /s/ C. FERGUSON
- ---------------------------
By:  C. FERGUSON


THE BANK OF NOVA SCOTIA

      /s/ D. GILES                  /s/ S. FOLEY
- ---------------------------    ---------------------------
By:  D. GILES                           S. FOLEY





                                    - 106 -
<PAGE>   109

BAYERISCHE VEREINSBANK AKTIENGESELLSCHAFT, LONDON BRANCH

       /s/ J. SIMMS
- ---------------------------
By:  J. SIMMS


COMERICA BANK

      /s/ IAN BROWN
- ---------------------------
By:  IAN BROWN (BY POWER OF ATTORNEY)


CREDIT LYONNAIS

      /s/ N.P. SPONG
- ---------------------------
By:  N.P. SPONG


CREDIT SUISSE

      /s/ S. FOSTER              /s/ JEFFREY HUGHES
- ---------------------------    ---------------------------
By:  S. FOSTER                       JEFFREY HUGHES


DEUTSCHE BANK AG LONDON

    /s/ B.D. STEVENSON
- ---------------------------
By:  B.D. STEVENSON


FLEET BANK OF MASSACHUSETTS, N.A.


      /s/ G.J. KILBY
- ---------------------------
By:  G.J. KILBY


THE MITSUBISHI BANK, LIMITED

    /s/ CLARE KINGDON
- ---------------------------
By:  CLARE KINGDON


NOMURA BANK INTERNATIONAL PLC

     /s/ SIMON DUFFAY
- ---------------------------
By:  SIMON DUFFAY


SVENSA HANDELSBANKEN (PUBL)

    /s/ ADELE WITMOND             /s/ PAUL BREAKSPEAR
- ---------------------------     ---------------------------    
 By:  ADELE WITMOND                   PAUL BREAKSPEAR




                                    - 107 -
<PAGE>   110

THE TOKAI BANK, LIMITED

     /s/ DAVID WILSON
- ---------------------------
By:  DAVID WILSON


WACHOVIA BANK OF GEORGIA, N.A.

 /s/ THOMAS N. MCKINSTRY
- ---------------------------
By:  THOMAS N. MCKINSTRY




AGENT


SWISS BANK CORPORATION

    /s/ D.M.M. BEEVER               /s/ IAN BROWN 
- ---------------------------    ---------------------------
By:  D.M.M. BEEVER                      IAN BROWN





                                    - 108 -

<PAGE>   1
                          AGREEMENT AND PLAN OF MERGER

        AGREEMENT AND PLAN OF MERGER dated as of February 24, 1998 (the
"Agreement"), by and among Siebe plc, a United Kingdom public limited company
(the "Parent"), WDR Acquisition Corp., a Delaware corporation and an indirect
wholly-owned subsidiary of Parent (the "Purchaser"), WDR Sub Corp., a Delaware
corporation and a wholly-owned subsidiary of the Purchaser (the "Merger Sub"),
and Wonderware Corporation, a Delaware corporation (the "Company").

        WHEREAS, the Boards of Directors of the Parent, the Purchaser, the
Merger Sub and the Company have each determined that it is in the best interests
of their respective stockholders for the Purchaser to acquire the Company on the
terms and subject to the conditions set forth in this Agreement;

        WHEREAS, in furtherance thereof, it is proposed that the Purchaser and
the Merger Sub shall make a cash tender offer to acquire all of the issued and
outstanding shares of common stock, par value $.001 per share, of the Company
(the "Company Common Stock"), together with the associated Rights (as
hereinafter defined) for $24.00 per share of Company Common Stock (all issued
and outstanding shares of Company Common Stock, together, except where the
context otherwise requires, with the associated Rights, being hereinafter
collectively referred to as the "Shares"), net to the seller in cash, in
accordance with the terms and subject to the conditions provided for herein and
in the offering documents relating to the Offer (as defined below); and

        WHEREAS, the Board of Directors of the Company has unanimously (i)
determined that each of the Offer and the Merger (as defined below) is fair to
and in the best interests of the Company and its stockholders and (ii) resolved
to approve and adopt this Agreement and the transactions contemplated hereby and
to recommend acceptance of the Offer and approval and adoption by the
stockholders of the Company of this Agreement and the Merger on the terms and
conditions set forth herein of the Merger Sub with and into the Company
following the Offer.

        NOW, THEREFORE, in consideration of the foregoing and the mutual
covenants and agreements herein contained, and intending to be legally bound
hereby, Parent, the Purchaser, the Merger Sub and the Company hereby agree as
follows:


<PAGE>   2
                                    ARTICLE 1

                                    THE OFFER

        1.1 The Offer. (a) Provided that none of the conditions set forth in
Annex I to this Agreement shall have occurred, the Purchaser (or one or more
other direct or indirect wholly-owned subsidiaries of Parent) shall, not later
than one business day after execution of this Agreement, publicly announce the
transactions contemplated hereby, and not later than five business days after
execution of this Agreement, commence (within the meaning of Rule 14d-2 under
the Securities Exchange Act of 1934, as amended (the "Exchange Act")), an offer
to purchase all Shares at a price of $24.00 per Share, net to the seller in cash
(the "Offer," which term shall include any amendments to such Offer not
prohibited by this Agreement) and, subject to a minimum of not less than a
majority of the outstanding Shares (on a fully-diluted basis) being validly
tendered and not withdrawn prior to the expiration of the Offer (the "Minimum
Condition") and the further conditions set forth in Annex I of this Agreement,
shall consummate the Offer. The Offer shall be made by means of an offer to
purchase containing the Minimum Condition and the further conditions set forth
in Annex I. The Purchaser hereby covenants and agrees that it shall hold the
Offer open for no less than 25 business days. Simultaneously with the
commencement of the Offer, the Purchaser shall file with the Securities and
Exchange Commission (the "Commission") a Tender Offer Statement on Schedule
14D-1 with respect to the Offer (the "Schedule 14D-1"). Notwithstanding the
foregoing, in the event any of the conditions set forth in Annex I to this
Agreement shall have occurred, the Purchaser may terminate the Offer. In the
event the Purchaser terminates the Offer, it may, subject to the prior written
approval of the Board of Directors of the Company, seek the approval of the
Company's stockholders for the Merger pursuant to the applicable provisions of
the General Corporation Law of the State of Delaware, as amended ("Delaware
Law"), as provided in Section 6.11. In such event, the Company shall take all
necessary action to call a special meeting of its stockholders to seek such
approval, and to prepare and file with the Commission a proxy statement relating
to such special meeting, all in accordance with Sections 6.1 and 6.2 hereof.

        (b) The Purchaser expressly reserves the right to modify the terms and
conditions of the Offer from time to time, except that, without the prior
written approval of the Company, the Purchaser shall not amend the Offer (i) to
reduce the cash price per Share to be paid pursuant thereto, (ii) to reduce the
number of Shares to be purchased thereunder, (iii) to change the form of
consideration to be paid in the Offer, (iv) to increase the minimum number of
Shares which must be tendered as a condition to the Offer, (v) to waive the
Minimum Condition if such waiver would result in less than a majority of the
outstanding Shares being accepted for payment or paid for pursuant to the Offer,
(vi) to impose additional conditions to the Offer, (vii) to extend the period of
the Offer beyond 60 days, except that the Offer may be extended beyond 60 days
(subject to the Company's right of termination in Section 8.1 herein), without
the prior written approval of the Company, if all required waiting periods under
applicable law have not expired or (viii) otherwise to amend the terms of the
Offer (including the conditions set forth in Annex I) in a manner that is
materially adverse to stockholders of the Company.


                                       2


<PAGE>   3
        1.2 Company Action.

               (a) The Company hereby consents to the Offer and represents that
        its Board of Directors has unanimously (i) approved the Offer and the
        Merger (as defined in Section 2.1), has determined that this Agreement
        and the Offer are fair to and in the best interest of the Company and
        its stockholders and has resolved to recommend acceptance of the Offer
        to the Company's stockholders, and that the stockholders tender their
        Shares in the Offer and, if applicable, vote to approve and adopt this
        Agreement and the Merger, (ii) (x) taken all action necessary to render
        Section 203 of the Delaware General Corporation Law, and (y) within 5
        days of the date hereof, shall have taken all action necessary to render
        the Company's Rights Agreement, dated as of February 15, 1996, between
        the Company and The First National Bank of Boston, as rights agent, (the
        "Rights Agreement"), inapplicable to the Offer, the Merger and this
        Agreement or any of the transactions contemplated hereby or thereby. The
        Company hereby consents to the inclusion in the Offer Documents (as
        hereinafter defined) of the recommendation of the Board of Directors
        described in the first sentence of this Section 1.2, except as such
        consent may be withdrawn by the Board of Directors of the Company in the
        exercise of its fiduciary duties as set forth in Section 6.6(b) hereof.
        The Company represents that it has received the opinion of Hambrecht &
        Quist LLC ("H&Q") to the effect that the consideration offered pursuant
        to the Offer and Merger is fair to stockholders of the Company from a
        financial point of view; it being understood and acknowledged that such
        opinion has been rendered to the Board of Directors of the Company and
        may not be relied upon by Parent, Purchaser or Merger Sub or their
        affiliates or their respective stockholders.

               (b) Simultaneously with, or as promptly as possible after, the
        commencement of the Offer, the Company shall file with the Commission
        and mail to the holders of Shares a Solicitation/Recommendation
        Statement on Schedule 14D-9 (the "Schedule 14D-9"), which shall reflect
        the recommendation of the Board of Directors; provided that prior to the
        filing of such Schedule 14D-9, the Company shall have provided the
        Purchaser's counsel with a reasonable opportunity to review and make
        comments with respect to such Schedule 14D-9. Such recommendation shall
        not be withdrawn or adversely modified except by resolution of the Board
        of Directors adopted in the exercise of applicable fiduciary duties upon
        the advice of counsel.

               (c) The Company shall promptly furnish the Purchaser with mailing
        labels containing the names and addresses of the record holders and, if
        available, of non-objecting beneficial owners of Shares and lists of
        securities positions of Shares held in stock depositories, each as of
        the most recent practicable date, and shall from time to time furnish
        the Purchaser with such additional information, including updated or
        additional lists of stockholders, mailing labels and lists of securities
        positions, and other assistance as the Purchaser may reasonably request
        in order to be able to communicate the Offer to the stockholders of the
        Company. Subject to the requirements of law, and except for such steps
        as are necessary to disseminate the Offer and any other documents
        necessary to consummate the Merger, Parent, the Purchaser and the Merger
        Sub and each 


                                       3


<PAGE>   4
        of their affiliates shall treat all information contained in such
        labels, lists and additional information as "Evaluation Material" in
        accordance with the letter agreement dated February 17, 1998 between
        Parent and the Company (the "Confidentiality Agreement").

        1.3 Directors. Promptly upon the payment by the Purchaser or any of
Parent's direct or indirect subsidiaries pursuant to the Offer for such number
of Shares which represent at least a majority of the outstanding Shares and from
time to time thereafter, the Company shall increase the size of its Board of
Directors to nine members, and the Purchaser shall be entitled to designate
members of the Company's Board of Directors such that the Purchaser, subject to
compliance with Section 14(f) of the Exchange Act, will have a number of
representatives on the Board of Directors, rounded up to the next whole number,
equal to the product obtained by multiplying nine by the percentage of Shares
beneficially owned by Parent and any of its subsidiaries. The Company shall,
upon request by the Purchaser, promptly increase the size of the Board of
Directors to the extent permitted by its Certificate of Incorporation and/or use
its best efforts to secure the resignations of such number of directors as is
necessary to enable the Purchaser's designees to be elected to the Board of
Directors and shall use its best efforts to cause the Purchaser's designees to
be so elected. At the request of the Purchaser, the Company shall take, at its
expense, all action necessary to effect any such election, including the mailing
to its stockholders of the information required by Section 14(f) of the Exchange
Act and Rule 14f-1 promulgated thereunder, in form and substance reasonably
satisfactory to the Purchaser and its counsel.

        Notwithstanding the foregoing, (i) the affirmative vote of a majority of
the directors of the Company who are directors on the date hereof and who remain
directors shall be required to amend, modify or waive any provision of this
Agreement, or to approve any other action by the Company with respect to the
Offer or the other transactions contemplated hereby, which adversely affects the
interests of the stockholders of the Company with respect to such transactions
and (ii) none of the Purchaser, the Merger Sub or Parent shall, directly or
indirectly, cause the Company to breach its obligations hereunder.


                                    ARTICLE 2

                                   THE MERGER

        2.1 The Merger. At the Effective Time (as defined in Section 2.3), in
accordance with this Agreement and Delaware Law, the Merger Sub (or another
direct or indirect Delaware subsidiary of Parent) shall be merged with and into
the Company (the "Merger"), the separate existence of the Merger Sub (except as
may be continued by operation of law) shall cease, and the Company shall
continue as the surviving corporation under the corporate name it possesses
immediately prior to the Effective Time. The Company, in its capacity as the
corporation surviving the Merger, sometimes is referred to herein as the
"Surviving Corporation." Notwithstanding the foregoing, the Purchaser may revise
the structure of the Merger (including merging the Company into the Merger Sub
or merging the Company with or into another direct or indirect wholly-owned
subsidiary of Parent) provided that any such restructuring does not 


                                       4


<PAGE>   5
adversely affect the stockholders of the Company or does not cause the Company
to breach its representations and warranties hereunder.

        2.2 Effect of the Merger. The Surviving Corporation shall possess all
the rights, privileges, immunities and franchises, both public and private, of
the Merger Sub and the Company (collectively, the "Constituent Corporations");
shall be vested with all property, whether real, personal, or mixed, and all
debts due on whatever account, including subscriptions to shares, and all other
choses in action, and all and every other interest belonging to or due to each
of the Constituent Corporations; and shall be responsible and liable for all the
obligations and liabilities of each of the Constituent Corporations, all with
the effect set forth in the Delaware Law.

        2.3 Consummation of the Merger. As soon as is practicable after the
satisfaction or waiver, if possible, of the conditions set forth in Article 7,
and in no event later than five business days after such satisfaction or waiver,
the parties hereto will cause an Agreement or Certificate of Merger to be filed
with the Secretary of State of the State of Delaware, in such form as required
by, and executed in accordance with, the relevant provisions of applicable law
using the procedures permitted in Section 253 (if possible) or Section 251 of
the Delaware Law. The Merger shall be effective at the time of the filing of the
Agreement or Certificate of Merger with the Secretary of State of the State of
Delaware (the "Effective Time").

        2.4 Certificate of Incorporation and By-Laws; Directors and Officers.
The Certificate of Incorporation and By-Laws of the Company, as in effect
immediately prior to the Effective Time, shall be the Certificate of
Incorporation and By-Laws of the Surviving Corporation immediately after the
Effective Time and shall thereafter continue to be its Certificate of
Incorporation and By-Laws until amended as provided therein and under the
Delaware Law. The directors of the Merger Sub holding office immediately prior
to the Effective Time shall be the directors of the Surviving Corporation
immediately after the Effective Time.

        2.5 Conversion of Securities. At the Effective Time, by virtue of the
Merger and without any action on the part of the Merger Sub, the Company or the
holder of any of the following securities:

               (a) Each Share issued and outstanding immediately prior to the
        Effective Time, other than Shares to be canceled pursuant to Section
        2.5(b) hereof, shall automatically be canceled and extinguished and,
        other than Shares with respect to which appraisal rights are properly
        exercised ("Dissenting Shares"), be converted into and become a right to
        receive in cash the highest price per share paid pursuant to the Offer
        (the "Merger Consideration").

               (b) Each Share issued and outstanding immediately prior to the
        Effective Time and held in the treasury of the Company or owned by
        Parent, the Purchaser or any subsidiary thereof shall automatically be
        canceled and retired and no payment shall be made with respect thereto.


                                       5


<PAGE>   6
               (c) Each share of the Merger Sub's Common Stock, par value $.01
        per share, issued and outstanding immediately prior to the Effective
        Time shall automatically be converted into and become one validly
        issued, fully paid and nonassessable share of Common Stock, par value
        $.001 per share, of the Surviving Corporation.

               (d) The holders of Dissenting Shares, if any, shall be entitled
        to payment for such shares only to the extent permitted by and in
        accordance with the provisions of Section 262 of the Delaware Law;
        provided, however, that if, in accordance with such Section of the
        Delaware Law, any holder of Dissenting Shares shall (i) subsequently
        withdraw his demand for payment for such shares, or (ii) fail to
        maintain a petition for appraisal as provided in such Section; or if
        neither any holder of Dissenting Shares nor the Surviving Corporation
        has filed suit as provided in Section 262 of the Delaware Law, such
        holder or holders (as the case may be) shall forfeit such right to
        payment of such Shares, and such Shares shall thereupon be deemed to
        have been converted into and to have become exchangeable for, as of the
        Effective Time, the right to receive the Merger Consideration.

        2.6 Company Stock Options; Stock Purchase Plan. Each holder of then
outstanding options to purchase Shares ("Options") granted under any employee or
non-employee compensation plan or arrangement of the Company (the "Stock Plans")
shall be entitled, at the Effective Time, to exercise his or her Options, or to
surrender them for payment in accordance with the provisions of Section 6.3(a)
hereof. Any Options not so exercised or surrendered shall be terminated and
canceled at the Effective Time. The Company shall have the right to cause all
funds held in the Company's Employee Stock Purchase Plan to be used to purchase
shares of Company Common Stock so that such shares will be converted into the
right to receive cash in the Merger; provided that the Employee Stock Purchase
Plan is thereupon terminated.

        2.7    Surrender of Shares; Stock Transfer Books.

               (a) Prior to the Effective Time, the Purchaser shall designate a
        bank or trust company reasonably satisfactory to the Company to act as
        agent for the holders of Shares (the "Exchange Agent") to receive the
        Merger Consideration, and at or immediately following the Effective
        Time, Parent shall take all steps necessary to cause the Purchaser to
        have sufficient funds to be able to provide the Exchange Agent with the
        funds necessary to make the payments contemplated by this Article II.

               (b) Promptly after the Effective Time, the Exchange Agent shall
        mail to each person who was, at the Effective Time, a holder of record
        of Shares entitled to receive the Merger Consideration pursuant to
        Section 2.5(a) a letter of transmittal (which shall specify that
        delivery shall be effected, and risk of loss and title to the
        certificates previously representing Shares to be exchanged pursuant to
        the Merger (the "Certificates") shall pass, only upon proper delivery of
        such Certificates to the Exchange Agent) and instructions for use
        thereof in effecting the surrender of the Certificates. Upon surrender
        to the Exchange Agent of the Certificates, together with such letter of
        transmittal, duly completed and validly executed in accordance with the
        instructions 


                                       6


<PAGE>   7
        thereto, and such other documents as may be requested, the Exchange
        Agent shall promptly deliver to the persons entitled thereto the Merger
        Consideration payable in respect of the Shares represented by the
        Certificates, and the Certificates shall forthwith be canceled. Until so
        surrendered and exchanged, each such Certificate (other than
        Certificates representing Shares held in the treasury of the Company, by
        the Purchaser or any subsidiary of the Purchaser and Dissenting Shares)
        evidencing Shares shall, after the Effective Time, be deemed to evidence
        only the right to receive the Merger Consideration.

               (c) If delivery of the Merger Consideration in respect of
        canceled Shares is to be made to a person other than the person in whose
        name a surrendered Certificate or instrument is registered, it shall be
        a condition to such delivery or payment that the Certificate or
        instrument so surrendered shall be properly endorsed or shall be
        otherwise in proper form for transfer and that the person requesting
        such delivery or payment shall have paid any transfer and other taxes
        required by reason of such delivery or payment in a name other than that
        of the registered holder of the Certificate or instrument surrendered or
        shall have established to the satisfaction of the Surviving Corporation
        or the Exchange Agent that such tax either has been paid or is not
        payable.

               (d) At the Effective Time, the stock transfer books of the
        Company shall be closed and there shall be no further registration of
        transfers of Shares thereafter on the records of the Company. From and
        after the Effective Time, holders of Certificates evidencing ownership
        of Shares outstanding immediately prior to the Effective Time shall
        cease to have any rights with respect to such Shares except as otherwise
        provided herein or by law. No interest shall be paid or accrue on any
        portion of the Merger Consideration.

               (e) Notwithstanding anything to the contrary in this Section 2.7,
        none of the Exchange Agent, the Surviving Corporation or any party
        hereto shall be liable to a holder of Shares for any amount properly
        paid to a public official pursuant to any applicable property, escheat
        or similar law.

        2.8 Taking of Necessary Action; Further Action. Parent, the Purchaser,
the Merger Sub and the Company, respectively, shall use all reasonable efforts
to take all such action as may be necessary or appropriate in order to
effectuate the Offer and the Merger as promptly as possible and to carry out the
transactions provided for herein or contemplated hereby. If at any time after
the Effective Time any further action is necessary or desirable to carry out the
purposes of this Agreement and to vest the Surviving Corporation with full
right, title and possession to all assets, property, rights, privileges,
immunities, powers and franchises of either of the Constituent Corporations, the
officers and directors of the Surviving Corporation are fully authorized in the
name of either of the Constituent Corporations or otherwise to take, and shall
take, all such action.


                                       7


<PAGE>   8
                                    ARTICLE 3

                  REPRESENTATIONS AND WARRANTIES OF THE PARENT,
                        THE PURCHASER AND THE MERGER SUB

        The Parent, the Purchaser and the Merger Sub hereby agree and represent
and warrant, on a joint and several basis, to the Company as follows:

        3.1 Organization and Qualification. Each of the Parent, the Purchaser
and the Merger Sub has been duly incorporated and is validly existing as a
corporation and in good standing under the laws of the United Kingdom in the
case of Parent and the laws of Delaware in the case of the Purchaser and Merger
Sub and has the requisite corporate power to carry on its respective business as
now conducted. Each of the Parent, the Purchaser and the Merger Sub is duly
qualified as a foreign corporation in good standing in each jurisdiction in
which the character of its properties owned or leased or the nature of its
activities makes such qualification necessary, except where the failure to be so
qualified would not have a material adverse effect on the business, operations
or financial condition of the Parent and its subsidiaries, taken as a whole. As
of the date of this Agreement, the Parent, the Purchaser and the Merger Sub have
no obligations or liabilities, and none of such parties are parties to any
litigation, which in any case if paid or adversely determined would have a
material effect on their ability to consummate the transactions contemplated by
this Agreement. The Purchaser is an indirect wholly-owned subsidiary of the
Parent and the Merger Sub is a wholly-owned subsidiary of the Purchaser. The
Certificate or Articles of Incorporation and By-Laws of the Purchaser and the
Merger Sub contain no provisions which would have a material adverse effect on
the ability of either of such entities to consummate the transactions
contemplated by this Agreement.

        3.2 Authority Relative to this Agreement. Each of the Parent, the
Purchaser and the Merger Sub has the requisite corporate power and authority to
enter into this Agreement and to carry out its respective obligations hereunder.
The execution and delivery of this Agreement by the Parent, the Purchaser and
the Merger Sub and the consummation by the Parent, the Purchaser and the Merger
Sub of the transactions contemplated hereby have been duly authorized by the
respective Boards of Directors of the Parent, the Purchaser and the Merger Sub,
by an indirect wholly owned subsidiary of the Parent as the sole stockholder of
the Purchaser, and by the Purchaser as the sole stockholder of the Merger Sub,
and no other corporate proceedings on the part of the Parent or any of its
subsidiaries, the Purchaser or the Merger Sub are necessary to authorize this
Agreement and the transactions contemplated hereby. This Agreement has been duly
executed and delivered by the Parent, the Purchaser and the Merger Sub and
constitutes a valid and binding obligation of each such company, enforceable in
accordance with its terms. None of the Parent, the Purchaser or the Merger Sub
is subject to or obligated under any provision of (a) its Certificate or
Articles of Incorporation or By-Laws, or (b) any contract, indenture,
instrument, or other agreement, or (c) any license, franchise or permit, or (d)
any law, regulation, order, judgment or decree, which would be breached,
violated or defaulted or in respect of which a right of termination or
acceleration or any encumbrance on any of its assets could be created by its
execution, delivery and performance of this Agreement and the consummation by it
of the transactions contemplated hereby, other than any such breaches,


                                       8


<PAGE>   9
violations, defaults, rights of termination or acceleration, or encumbrances,
which will not, individually or in the aggregate, have a material adverse effect
on the ability of the Parent, the Purchaser or the Merger Sub to consummate the
Offer or the Merger or any of the transactions contemplated hereby. Other than
in connection with or in compliance with the provisions of the Delaware Law, the
Exchange Act and the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as
amended (the "Hart-Scott-Rodino Act"), no authorization, consent or approval of,
or filing with, any public body, court or authority is necessary on the part of
the Parent, the Purchaser or the Merger Sub for the consummation by the Parent,
the Purchaser and the Merger Sub of the transactions contemplated by this
Agreement other than filings with such foreign jurisdictions in which
subsidiaries of the Company are organized which may require filings to be made
in connection with the transfer of control of such subsidiaries, and Parent, the
Purchaser and the Merger Sub each agrees to make any and all such filings on or
prior to the Effective Time if any of such parties are required to make such
filings under applicable law.

        3.3 Offer Documents. The Offer to Purchase and related Letter of
Transmittal and Schedule 14D-1 (and any amendments or supplements to the
foregoing) (which together constitute the "Offer Documents") shall in all
material respects conform with the requirements of the Exchange Act and the
rules and regulations thereunder (except that the foregoing representation shall
not apply with respect to the accuracy of information relating to the Company
which has been excerpted or derived from public sources or furnished in writing
by the Company specifically for inclusion in the Offer Documents). As of their
respective dates, and on the date they are first published, sent or given to
holders of Shares, the Offer Documents, taken as a whole, shall not contain any
misstatement of material fact or omit to state any material fact required to be
stated therein or necessary to make the statements contained therein, in light
of the circumstances in which they were made, not misleading. Parent and the
Purchaser agree to correct the Schedule 14D-1 and the other Offer Documents if
and to the extent that any of them shall become false or misleading in any
material respect, and Parent and the Purchaser further agree to take all steps
necessary to cause the Schedule 14D-1 as so corrected to be disseminated to
holders of Shares, in each case as and to the extent required by applicable law.
The information supplied by Parent for inclusion in the proxy statement to be
sent to the stockholders of the Company in connection with the meeting of the
Company's stockholders to consider the Merger, or the information statement to
be sent to such stockholders, as appropriate, shall not, on the date the proxy
statement or information statement is first mailed to stockholders, at the time
of such stockholders' meeting, if any, or at the Effective Time, contain any
statement which, at such time and in light of the circumstances under which it
shall be made, is false or misleading with respect to any material fact, or
shall omit to state any material fact necessary in order to make the statements
therein not false or misleading or necessary to correct any statement in any
earlier communication with respect to the solicitation of proxies for such
stockholders' meeting which has become false or misleading. The Company and its
counsel shall be given reasonable opportunities to review and comment on the
Offer Documents.

        3.4 Financing. Parent, the Purchaser and the Merger Sub have available
financing in an amount sufficient to consummate the Offer and the Merger.


                                       9


<PAGE>   10
        3.5 No Violation of the Margin Rules. None of the transactions
contemplated by this Agreement will violate or result in the violation of
Section 7 of the Exchange Act or any regulation promulgated pursuant thereto,
including, without limitation, Regulations G, T, U or X of the Board of
Governors of the Federal Reserve System.


                                    ARTICLE 4

                  REPRESENTATIONS AND WARRANTIES OF THE COMPANY

        The Company hereby represents and warrants to the Parent, the Purchaser
and the Merger Sub, except as set forth in the Disclosure Schedule which was
dated and delivered to the Parent, the Purchaser and the Merger Sub on or prior
to the date hereof, as follows:

        4.1 Organization and Qualification. The Company has been duly
incorporated and is validly existing as a corporation in good standing under the
laws of Delaware. The Company is duly qualified as a foreign corporation in good
standing in each jurisdiction in which the character of its properties owned or
leased or the nature of its activities makes such qualification necessary,
except where the failure to be so qualified would not have a material adverse
effect on the financial condition, properties, business, or results of
operations of the Company or the Surviving Corporation and their respective
subsidiaries, taken as a whole (a "Company Material Adverse Effect"). The
Company has full corporate power and authority to own its properties and conduct
its business as presently owned and conducted. The copies of the Certificate of
Incorporation and By-Laws of the Company previously delivered to the Purchaser
are true, correct and complete as of the date hereof.

        4.2 Subsidiaries. Each subsidiary of the Company, all of which are
listed in either Exhibit 22 to the Company's Annual Report on Form 10-K for the
fiscal year ended December 31, 1996 (the "Form 10-K Report") or the Disclosure
Schedule, has been duly incorporated and is validly existing as a corporation in
good standing under the laws of its jurisdiction of incorporation, is duly
qualified as a foreign corporation in good standing in each jurisdiction in
which the character of its properties owned or leased or the nature of its
activities make such qualification necessary, except where the failure to be so
qualified would not have a Company Material Adverse Effect, and has full power
and authority to own its properties and conduct its business as presently owned
and conducted. The Company owns, directly or indirectly, all of the outstanding
shares of capital stock of each such subsidiary free and clear of all liens,
claims. charges or encumbrances; there are no irrevocable proxies with respect
to such shares; and all such shares are validly issued, fully paid and
nonassessable. Except for the capital stock of such subsidiaries or otherwise as
disclosed in the Form 10-K Report, the Company does not own, directly or
indirectly, any investment in (a) any general partnership or joint venture or
(b) any equity or debt investment having either a fair market or face value or
cost in excess of $100,000. Except as disclosed in the Disclosure Schedule,
neither the Company nor any of its subsidiaries is obligated to make any
payments in the form of earn-outs, deferred purchase price or other
consideration in respect of the purchase price payable in connection with the
acquisition of any subsidiary or business.


                                       10


<PAGE>   11
        4.3 Capitalization. The authorized capital stock of the Company consists
of 50,000,000 Shares and 10,000,000 shares of preferred stock, $.001 par value
("Preferred Stock"), of which 500,000 shares have been designated Series A
Junior Participating Preferred Stock (the "Series A Preferred Stock"). As of the
date hereof, 14,314,078 Shares, and no shares of Preferred Stock, are issued and
outstanding. All issued and outstanding Shares are duly authorized and issued,
and are fully paid and nonassessable. As of the date hereof, (a) 2,231,757
shares of Common Stock are reserved for issuance pursuant to outstanding stock
options and (b) approximately 165,458 shares of Series A Preferred Stock are
reserved for issuance pursuant to preferred stock purchase rights (the "Rights")
issued under the Rights Agreement. Section 4.3 of the Disclosure Schedule sets
forth a complete and correct list of the Company's outstanding stock options,
including for each the name of the option holder, the date of grant, the
expiration date, the plan under which the option (or any portion thereof) was
granted. Except as otherwise described in the Disclosure Schedule, there are no
options, warrants, conversion privileges or other rights, agreements,
arrangements or commitments obligating the Company or any of its subsidiaries to
issue or sell any shares of, or make any payments based on the value or
appreciation of any, capital stock of the Company or any of its subsidiaries or
securities or obligations of any kind convertible into or exchangeable for any
shares of capital stock of the Company, any of its subsidiaries or any other
person. The holders of outstanding Shares are not entitled to any contractual or
statutory preemptive or other similar rights. Upon consummation of the Merger in
accordance with the terms of this Agreement, the Purchaser will own the entire
equity interest in the Company, and there will be no options, warrants,
conversion privileges or other rights, agreements, arrangements or commitments
obligating the Company or any of its subsidiaries to issue or sell any shares of
capital stock of the Company or of any of its subsidiaries.

        4.4 Authority Relative to this Agreement. The Company has the requisite
corporate power and authority to enter into this Agreement and to perform its
obligations hereunder. The execution and delivery of this Agreement by the
Company and the consummation by the Company of the transactions contemplated
hereby have been duly and unanimously authorized by the Board of Directors of
the Company and, except for the approval of its stockholders (if required) as
set forth in Section 6.1, no other corporate proceedings on the part of the
Company are necessary to authorize this Agreement and the transactions
contemplated hereby. This Agreement has been duly executed and delivered by the
Company and constitutes a valid and binding obligation of the Company,
enforceable in accordance with its terms. Neither the Company nor any of its
subsidiaries is subject to or obligated under any provision of (a) its
Certificate or Articles of Incorporation or By-Laws, (b) except as set forth in
the Disclosure Schedule, any contract, (c) any license, franchise or permit, or
(d) any law, regulation, order, judgment or decree, which would be breached or
violated or in respect of which a right of termination or acceleration or any
encumbrance on any of its or any of its subsidiaries' assets could be created by
the Company's execution, delivery and performance of this Agreement and the
consummation by the Company of the transactions contemplated hereby, other than
any such breaches, violations, rights or encumbrances which will not,
individually or in the aggregate, have a Company Material Adverse Effect. Other
than in connection with or in compliance with the provisions of the Delaware
Law, the Exchange Act and the Hart-Scott-Rodino Act, no 


                                       11


<PAGE>   12
authorization, consent or approval of, or filing with, any public body, court or
authority is necessary for the consummation by the Company of the transactions
contemplated by this Agreement other than filings with such foreign
jurisdictions in which subsidiaries of the Company are organized which may
require filings to be made in connection with the transfer of control of such
subsidiaries, and the Company agrees to make any and all such filings on or
prior to the Effective Time if the Company is required to make such filings
under applicable law.

        4.5 Commission Filings. The Company has heretofore delivered to the
Purchaser copies of the Company's (a) Form 10-K Report, (b) Quarterly Reports on
Form 10-Q for the fiscal quarters ended March 31, 1997, June 30, 1997 and
September 30, 1997 (collectively, the "Form 10-Q Reports"), and (c) all proxy
statements relating to the Company's meetings of stockholders (whether annual or
special) during 1996 and 1997, in each case as filed with the Commission. The
Company has heretofore made available to the Purchaser all other reports,
registration statements and other documents filed by the Company with the
Commission under the Exchange Act and the Securities Act. All such documents
described in the first two sentences of this section are collectively referred
to herein as the "Commission Filings." Except as set forth on the Disclosure
Schedule, the Company has not filed any Form 8-K Reports with the Commission
since January 1, 1997. The Company has timely filed all reports, registration
statements and other documents required to be filed with the Commission under
the rules and regulations of the Commission, and all Commission Filings complied
with the requirements of the Securities Act or the Exchange Act, as the case may
be. As of their respective dates, the Commission Filings (including in all cases
any exhibits or schedules thereto or documents incorporated therein by
reference) did not contain any untrue statement of material fact or omit to
state a material fact required to be stated therein or necessary to make the
statements therein, in light of the circumstances under which they were made,
not misleading.

        4.6 Financial Statements and Related Data. The (i) audited consolidated
financial statements and unaudited consolidated interim financial statements of
the Company included in the Form 10-K Report and the Form 10-Q Reports and (ii)
consolidated financial statements as of and for the fiscal year ended December
31, 1997 (the "1997 Financial Statements") have each been prepared in accordance
with generally accepted accounting principles applied on a consistent basis
during the periods involved (except as may be indicated in the notes thereto and
except, in the case of the unaudited statements, as may be permitted under Form
10-Q of the Exchange Act) and fairly present the consolidated financial position
of the Company and its consolidated subsidiaries as of the dates thereof and the
consolidated results of their operations and changes in financial position for
the periods then ended, subject, in the case of the unaudited consolidated
interim financial statements, to normal year-end adjustments. Upon completion of
the audit of the 1997 Financial Statements, the Company will provide a copy
thereof to the Purchaser, which will be the same in all material respects
(including footnotes) as the 1997 Financial Statements previously provided to
the Purchaser, will be accompanied by an unqualified audit opinion by Deloitte &
Touche LLP, the Company's independent public accountants, and will contain notes
that do not include any information that is different from that provided to the
Purchaser under or pursuant to this Agreement or any document referenced herein
or in the Disclosure Schedule hereto to the extent that such differences, taken
as a whole, 


                                       12


<PAGE>   13
reflect changes which would have a Company Material Adverse Effect (the "Audited
1997 Financial Statements").

        4.7 Absence of Certain Changes or Events. Except as contemplated by this
Agreement, or reflected in any financial statement or note thereto referred to
in Section 4.6 or reflected in the Disclosure Schedule, or reflected in any
Commission Filing filed prior to date hereof, since December 31, 1997, there has
not been (a) any change which would have a Company Material Adverse Effect; (b)
any damage, destruction or loss, whether covered by insurance or not, having a
Company Material Adverse Effect; (c) any entry by the Company or any subsidiary
into any commitment or transaction material to the Company and its subsidiaries
taken as a whole, which is not in the ordinary course of business; (d) any
change by the Company in accounting principles or methods except insofar as may
be required by a change in generally accepted accounting principles; (e) any
declaration, payment or setting aside for payment of any dividends or purchase
or redemption of any securities of the Company or (f) any entering into or
modification of any employment or severance contract with any executive officer
of the Company or any of its subsidiaries or any increase in compensation
payable by the Company or any of its subsidiaries to any of their executive
officers or any material increase under any bonus, pension or benefit plan.

        4.8 Litigation. Except as disclosed in the Form 10-K Report, the Form
10-Q Reports or the Disclosure Schedule, there are no claims, actions,
proceedings, or investigations pending or, to the best knowledge of the Company,
threatened against the Company or any of its subsidiaries or any of their
respective officers, directors, employees or agents (in their capacities as
such) before any court or governmental or regulatory authority or body, which if
adversely determined would have (to the extent not adequately reserved against
on the Company's December 31, 1997 balance sheet), individually or in the
aggregate, a Company Material Adverse Effect or would materially adversely
affect (i) the completion of the transactions contemplated by this Agreement or
(ii) the ability of the Purchaser or Parent through the acquisition of Shares to
own or operate the business of the Company.

        4.9 Liabilities. Except as disclosed in the 1997 Financial Statements,
neither the Company nor any of its subsidiaries has any material obligation or
liability (whether accrued, absolute, contingent, unliquidated or otherwise,
whether or not known to the Company, whether due or to become due) other than
(a) liabilities incurred since December 31, 1997 in the ordinary course of
business consistent with past practice or (b) obligations and liabilities which
have been incurred in the ordinary course of business pursuant to contracts and
should not be reflected under generally accepted accounting principles on the
1997 Financial Statements, which in the aggregate are not material to the
Company and its subsidiaries, taken as a whole.

        4.10 Environmental Matters. The Company and its subsidiaries have
obtained all material permits, licenses and other authorizations which are
required under applicable federal, state, local and foreign laws relating to
public health and safety, worker health and safety, pollution or protection of
the environment, including those relating to the manufacture, processing,
distribution, use, treatment, storage, disposal, transport, or handling of
pollutants, contaminants or hazardous or toxic materials or wastes, except where
its failure to obtain the 


                                       13


<PAGE>   14
same would not have a Company Material Adverse Effect. The Company and its
subsidiaries have complied and are in compliance with all terms and conditions
of any and all required permits, licenses, and authorizations, and with all
other limitations, restrictions, conditions, standards, prohibitions,
requirements, obligations, schedules and timetables contained in any applicable
federal, state, local or foreign law or any regulation, code, plan, order,
decree or judgment relating to public health and safety, worker health and
safety, and pollution or protection of the environment, or any notice or demand
letter issued, entered, promulgated or approved thereunder, except where the
failure to comply would not have a Company Material Adverse Effect. To the best
knowledge of the Company, no facts, events or conditions relating to the
Company's or any of its subsidiaries' past or present operations, facilities or
properties interfere in any material respect with or prevent continued
compliance with, or give rise to any material present or potential legal, common
law or statutory liability under, any applicable law or regulation related to
the manufacture, processing, distribution, use, treatment, storage, disposal,
transport, or handling, or related to the emission, discharge, release or
threatened release into the environment, of any pollutant, contaminant, or
hazardous or toxic material or waste.

        4.11   Employee Benefit Plans.

               (a) Section 4.11(a) of the Disclosure Schedule hereto sets forth
        a list of all "employee benefit plans," as defined in Section 3(3) of
        the Employee Retirement Income Security Act of 1974, as amended
        ("ERISA"), and all other material employee benefit or compensation
        arrangements, including, without limitation, any such arrangements
        providing severance pay, sick leave, vacation pay, salary continuation
        for disability, retirement benefits, deferred compensation, bonus pay,
        incentive pay, stock options (including those held by directors,
        employees, and consultants), hospitalization insurance, medical
        insurance, life insurance, scholarships or tuition reimbursements, that
        are maintained by the Company, any subsidiary of the Company or any
        Company ERISA Affiliate (as defined in this Section 4.11) or with
        respect to which the Company, any subsidiary of the Company or any
        Company ERISA Affiliate has or may have any liability, contingent or
        otherwise (the "Company Employee Benefit Plans").

               (b) None of the Company Employee Benefit Plans is a
        "multiemployer plan," as defined in Section 4001(a)(3) of ERISA (a
        "Multiemployer Plan"), and neither the Company nor any subsidiary of the
        Company or Company ERISA Affiliate presently maintains or has maintained
        such a plan.

               (c) Except as provided in Part 6 of Title I of ERISA, neither the
        Company nor any subsidiaries of the Company maintain or contribute to
        any plan or arrangement which provides or has any liability to provide
        life insurance or medical or other employee welfare benefits to any
        employee or former employee upon his retirement or termination of
        employment, and neither the Company nor any of its subsidiaries have
        ever represented, promised or contracted (whether in oral or written
        form) to any employee or former employee that such benefits would be
        provided.


                                       14


<PAGE>   15
               (d) Except as provided for in the Options described in Section
        4.3 of the Disclosure Schedule, the execution of, and performance of the
        transactions contemplated in, this Agreement will not, either alone or
        upon the occurrence of subsequent events, result in any payment (whether
        of severance pay or otherwise), acceleration, forgiveness of
        indebtedness, vesting, distribution, increase in benefits or obligation
        to fund benefits with respect to any individual. The only severance
        agreements or severance policies applicable to the Company or the
        subsidiary of the Company in the event of a change of control of the
        Company are the agreements and policies specifically referred to in
        Section 4.11(d) of the Disclosure Schedule. Section 4.11(d) of the
        Disclosure Schedule sets forth all payments or benefits which will or
        may be made by the Company, Parent or any of their subsidiaries or
        affiliates pursuant to contracts or arrangements in effect on the date
        hereof with respect to any employee of the Company or any subsidiary of
        the Company which may be characterized as a "parachute payment" within
        the meaning of Section 280G(b)(2) of the Internal Revenue Code of 1986,
        as amended.

               (e) Each Company Employee Benefit Plan that is intended to
        qualify under Section 401 of the Code, and each trust maintained
        pursuant thereto, has been determined to be exempt from federal income
        taxation under Section 501 of the Code by the IRS, and, to the Company's
        knowledge, nothing has occurred with respect to the operation or
        organization of any such Company Employee Benefit Plan that would cause
        the loss of such qualification or exemption or the imposition of any
        liability, penalty or tax under ERISA or the Code. No Company Employee
        Benefit Plan is a "defined benefit plan" within the meaning of Section
        3(35) of ERISA, and neither the Company nor any subsidiary of the
        Company or any Company ERISA Affiliate maintains or has ever maintained
        such a plan.

               (f) (i) All contributions (including all employer contributions
        and employee salary reduction contributions) required to have been made
        under any of the Company Employee Benefit Plans to any funds or trusts
        established thereunder or in connection therewith have been made by the
        due date thereof, (ii) the Company and each of its subsidiaries have
        complied in all material respects with any notice, reporting and
        documentation requirements of ERISA and the Code, (iii) there are no
        pending actions, claims or lawsuits which have been asserted, instituted
        or, to the Company's knowledge, threatened, in connection with the
        Company Employee Benefit Plans, and (iv) the Company Employee Benefit
        Plans have been maintained, in all material respects, in accordance with
        their terms and with all provisions of ERISA and the Code (including
        rules and regulations thereunder) and other applicable federal and state
        laws and regulations.

               (g) Section 4.11(g) of the Disclosure Schedule sets forth a
        complete list of all amounts outstanding relating to bonuses payable to
        employees and any obligation to pay bonuses to employees relating to the
        Company's performance, the employee's performance or the transactions
        contemplated hereby.


                                       15


<PAGE>   16
               (h) All compensation attributable to outstanding Options
        constitutes "qualified performance-based compensation" within the
        meaning of Section 162(m) of the Code and the regulations promulgated
        thereunder.

        For purposes of this Agreement, "Company ERISA Affiliate" means any
business or entity which is a member of the same "controlled group of
corporations," under "common control" or a member of an "affiliated service
group" with the Company within the meanings of Sections 414(b), (c) or (m) of
the Code, or required to be aggregated with the Company under Section 414(o) of
the Code, or is under "common control" with the Company, within the meaning of
Section 4001(a)(14) of ERISA, or any regulations promulgated or proposed under
any of the foregoing Sections.

        4.12 Labor Matters. (i) There are no controversies pending or, to the
knowledge of the Company, threatened, between the Company or any of its
subsidiaries and any group of their respective employees; (ii) neither the
Company nor, to the knowledge of the Company, any of its subsidiaries, is a
party to any collective bargaining agreement or other labor union contract
applicable to persons employed by the Company or its subsidiaries nor does the
Company know of any activities or proceedings of any labor union to organize any
such employees; (iii) neither the Company nor any of its subsidiaries has
breached or otherwise failed to comply with any provision of any such agreement
or contract and there are no grievances outstanding against any such parties
under any such agreement or contract; (iv) there are no unfair labor practice
complaints pending against the Company or any of its subsidiaries before the
National Labor Relations Board or any current union representation questions
involving employees of the Company or any of its subsidiaries; and (v) the
Company has no knowledge of any strikes, slowdowns, work stoppages, lockouts, or
threats thereof, by or with respect to any employees of the Company or any of
its subsidiaries. No consent of any union which is a party to any collective
bargaining agreement with the Company is required to consummate the transactions
contemplated by this Agreement.

        4.13 Offer Documents. Neither the Schedule 14D-9 nor any of the
information supplied by the Company for inclusion in the Offer Documents shall,
at the respective times the Schedule 14D-9, the Offer Documents or any such
amendments or supplements are filed with the SEC or are first published, sent or
given to stockholders, as the case may be, contain any untrue statement of a
material fact or omit to state any material fact required to be stated therein
or necessary in order to make the statements therein, in the light of the
circumstances under which they were made, not misleading. In the event that the
Purchaser has not designated a majority of the members of the Company's Board of
Directors pursuant to the terms of Section 1.3 hereof and a stockholder vote is
required, all information supplied by the Company for inclusion in any proxy
statement filed with the Commission and sent or given to stockholders pursuant
to Section 6.2 hereof shall not contain any untrue statement of a material fact
or omit to state any material fact required to be stated therein or necessary in
order to make the statements therein, in light of the circumstances under which
they were made, not misleading at the time of filing with the Commission,
mailing to stockholders or any meeting of stockholders. Notwithstanding the
foregoing, the Company makes no representation or warranty with respect to any
information which is supplied in writing by Parent, the Purchaser or the Merger
Sub specifically for inclusion 


                                       16


<PAGE>   17
and which is contained in any of the foregoing documents or which is excerpted
or derived from public sources.

        4.14   Proprietary Rights.

               (a) The Company and its subsidiaries possess or have adequate
        rights to use all material trademarks, trade names, patents, service
        marks, marks, brand names, computer programs, databases, industrial
        designs and copyrights necessary for the operation of the businesses of
        each of the Company and its subsidiaries (collectively, the "Proprietary
        Rights"). All of the Proprietary Rights that are material to the conduct
        of the Company's business taken as a whole are owned by the Company or
        its subsidiaries free and clear of any and all encumbrances that would
        have a material adverse effect on the value of, or ability of Purchaser
        or Merger Sub to utilize, the item of the Proprietary Rights to which
        such encumbrance relates, and neither the Company nor any such
        subsidiary has forfeited or otherwise relinquished any Proprietary
        Rights which forfeiture would have a Company Material Adverse Effect.
        The use of the Proprietary Rights by the Company or its subsidiaries
        does not conflict with, infringe upon, violate or interfere with or
        constitute an appropriation of any right, title, interest or goodwill,
        including, without limitation, any intellectual property right,
        trademark, trade name, patent, service mark, brand mark, brand name,
        computer program, database, industrial design, copyright or any pending
        application therefor of any other person, except where such conflict,
        infringement, violation, interference or appropriation would not result
        in a Company Material Adverse Effect. The Company has received no
        written notice that the use of any Proprietary Rights or trade dress by
        the Company or its subsidiaries conflicts with, infringes upon, violates
        or interferes with any rights of any other person. There are no pending
        claims that any of the Proprietary Rights is invalid or conflicts with
        the asserted rights of any other person or has not been used or enforced
        or has been failed to be used or enforced in a manner that would result
        in the abandonment, cancellation or unenforceability of any of the
        Proprietary Rights that is material to the conduct of the Company's
        business. Neither the Company nor any of its subsidiaries is in default
        under the terms of any third party license or other right to use any of
        the Proprietary Rights which default is likely to have a Company
        Material Adverse Effect.

               (b) It is the Company's policy to have each employee, consultant
        or contractor of the Company execute a proprietary information and
        confidentiality agreement substantially in the form of the Company's
        standard forms of such agreement, and substantially all of the Company's
        employees, consultants and contractors have executed such an agreement.
        All computer software included in the Company's products (i) has been
        either created by employees of the Company within the scope of their
        employment or otherwise on a work-for-hire basis or by consultants or
        contractors who have created such software themselves and have assigned
        all right, title and interest they have in such software to the Company
        or (ii) is licensed to the Company pursuant to valid and binding
        agreements.


                                       17


<PAGE>   18
        4.15 Taxes. Each of the Company and its subsidiaries has filed all
federal and state tax returns and reports, and all material local and foreign
tax returns and reports, that it was required to file. All such tax returns and
reports were correct and complete in all material respects. All taxes owed by
any of the Company and its subsidiaries have been paid. Each of the Company and
its subsidiaries has withheld and paid all taxes required to have been withheld
and paid in connection with amounts paid to any employee, independent
contractor, creditor, stockholder, or other third party. Neither the Internal
Revenue Service (the "IRS") nor any other taxing authority or agency is now
asserting or, to the best of the Company's knowledge, threatening to assert
against the Company or any of its subsidiaries any deficiency or claim for
material additional taxes or interest thereon or penalties in connection
therewith. Neither the Company nor any of its subsidiaries has granted any
waiver of any statute of limitations with respect to, or any extension of a
period for the assessment of, any federal, state, local or foreign income tax.
The accruals and reserves for taxes reflected in the balance sheet of the
Company as of December 31, 1997 are adequate to cover all taxes accruable
through such date (including interest and penalties, if any, thereon) in
accordance with generally accepted accounting principles. Neither the Company
nor any of its subsidiaries has made an election under Section 341(f) of the
Code. The Company is not, and has not been during the period specified in
Section 897(c)(1)(A)(ii) of the Code, a United States real property holding
corporation within the meaning of Section 897(c) of the Code.

        4.16 Brokers, Advisors. No broker, finder or investment banker (other
than H&Q) is entitled to any brokerage, finder's or other fee or commission in
connection with the transactions contemplated by this Agreement based upon
arrangements made by and on behalf of the Company. The Company has heretofore
furnished to the Purchaser and the Merger Sub a complete and correct copy of all
agreements between the Company and H&Q pursuant to which such firm would be
entitled to any payment relating to the transactions contemplated hereunder.

        4.17 Product Liabilities. Except as set forth in the Disclosure
Schedule, there are no product warranty, product liability or similar claims
pending, or to the best knowledge of the Company overtly threatened, against the
Company or any of its subsidiaries.

        4.18 Related Party Transactions. Except as set forth in the Disclosure
Schedule, or the SEC Reports for the year ended December 31, 1996 and for the
nine months ended September 30, 1997, no current or former stockholder,
director, officer or key employee of the Company or any of its subsidiaries nor
any "Associate" (as defined in Rule 405 promulgated under the Securities Act) of
any such person, is presently or has been, directly or indirectly through his
affiliation with any other person or entity, a party to any transaction with the
Company or any of its subsidiaries providing for the furnishing of services
(except as an employee) by or to, or rental of real or personal property from or
to, or otherwise requiring cash payments by or to any such person. In addition,
except as set forth in the Disclosure Schedule or the SEC Reports, during such
periods there was no relationship or transaction involving the Company or any of
its subsidiaries which is described in Item 404 of Regulation S-K promulgated
under the Securities Act.


                                       18


<PAGE>   19
        4.19 Rights Agreement. No later than 5 days from the date hereof, the
Company shall have amended the Rights Agreement so that the Rights Agreement
will not be applicable to this Agreement, the Offer, the announcement of the
Offer, the purchase of Shares by Parent, the Purchaser or the Merger Sub
pursuant to the Offer or the Merger, or any other action contemplated hereby.

                                    ARTICLE 5

                     CONDUCT OF BUSINESS PENDING THE MERGER

        5.1 Conduct of Business by the Company Pending the Merger. The Company
covenants and agrees that, prior to the Effective Time, unless the Purchaser
shall otherwise agree in writing or as otherwise expressly contemplated or
permitted by this Agreement:

               (a) The business of the Company and its subsidiaries shall be
        conducted only in, and the Company and its subsidiaries shall maintain
        their facilities in, the ordinary course of business and consistent with
        past practice.

               (b) The Company shall not directly or indirectly do or permit to
        occur any of the following: (i) issue, sell, pledge, dispose of or
        encumber (or permit any of its subsidiaries to issue, sell, pledge,
        dispose of or encumber) any shares of, or any options, warrants,
        conversion privileges or rights of any kind to acquire any shares of,
        any capital stock of the Company or any of its subsidiaries (other than
        shares issuable upon exercise of the outstanding (as of the date hereof)
        Options or any rights to purchase shares of Company Common Stock
        pursuant to the Employee Stock Purchase Plan, in each case in accordance
        with their respective terms in effect on the date hereof); (ii) amend or
        propose to amend the Certificate or Articles of Incorporation or By-Laws
        of it or any of its subsidiaries; (iii) split, combine or reclassify any
        outstanding Shares, or declare, set aside or pay any dividend or other
        distribution payable in cash, stock, property or otherwise with respect
        to the Shares; (iv) redeem, purchase or acquire or offer to acquire (or
        permit any of its subsidiaries to redeem, purchase or acquire or offer
        to acquire) any Shares or other securities of the Company or any of its
        subsidiaries other than as contemplated by Section 2.5 hereof and other
        than for the repurchase by the Company, pursuant to existing agreements,
        of any outstanding Shares upon termination of an employment, director or
        consulting relationship with the Company; or (v) enter into or modify
        any agreement, commitment or arrangement with respect to any of the
        foregoing.

               (c) Neither the Company nor any of its subsidiaries shall (i)
        sell, pledge, lease, dispose of or encumber any material assets other
        than in the ordinary course of business consistent with past practice;
        (ii) acquire (by merger, consolidation, acquisition of stock or assets
        or otherwise) any corporation, partnership or other business
        organization or enterprise or material assets thereof; (iii) incur any
        indebtedness for borrowed money or issue any debt securities for
        borrowings except in the ordinary course of business and consistent with
        past practice; (iv) guarantee, endorse or otherwise became liable or
        responsible (whether directly, contingently or otherwise) for the
        obligations of any other 


                                       19


<PAGE>   20
        person (other than a subsidiary of the Company or the Company) except in
        the ordinary course of business consistent with past practice and in
        amounts immaterial to the Company; or (v) enter into or modify any
        contract, agreement, commitment or arrangement with respect to any of
        the foregoing.

               (d) Neither the Company nor any of its subsidiaries shall (i)
        enter into or modify any employment, severance or similar agreements or
        arrangements with, or grant any bonuses, salary increases, severance or
        termination pay to, any officers or directors; or (ii) in the case of
        employees who are not officers or directors, take any action other than
        in the ordinary course of business consistent with past practice (none
        of which actions shall be unreasonable or unusual) with respect to the
        grant of any bonuses, salary increases, severance or termination pay or
        with respect to any increase of benefits in effect on the date of this
        Agreement.

               (e) Except as may be required by applicable law, neither the
        Company nor any of its subsidiaries shall adopt or amend any bonus,
        profit sharing, compensation, stock option, pension, retirement,
        deferred compensation, employment or other employee benefit plan,
        agreement, trust fund or arrangement for the benefit or welfare of any
        employee.

               (f) Except to the extent required by fiduciary obligations under
        applicable law as advised by counsel, the Company will not (i) call any
        meeting (other than any meeting contemplated by Section 6.1) of its
        stockholders or (ii) waive or modify any provision of, or terminate any,
        confidentiality or standstill agreement entered into by the Company with
        any person.

               (g) The Company shall use its best efforts to cause its current
        insurance (or reinsurance) policies not to be canceled or terminated or
        any of the coverage thereunder to lapse, unless simultaneously with such
        termination, cancellation or lapse, replacement policies providing
        coverage equal to or greater than the coverage under the canceled,
        terminated or lapsed policies for substantially similar premiums are in
        full force and effect.

               (h) The Company (i) shall use its reasonable efforts, and cause
        each of its subsidiaries to use reasonable efforts, to preserve intact
        their respective business organizations and goodwill, keep available the
        services of its officers and employees as a group and maintain
        satisfactory relationships with suppliers, distributors, customers and
        others having business relationships with it or its subsidiaries; (ii)
        shall confer on a regular and frequent basis with representatives of the
        Purchaser and the Merger Sub to report operational matters and the
        general status of ongoing operations; (iii) shall not take any action,
        and shall not permit any of its 


                                       20


<PAGE>   21
        subsidiaries to take any action, which would render, or which reasonably
        may be expected to render, any representation or warranty made by it in
        this Agreement untrue at any time prior to the Effective Time; and (iv)
        shall notify the Purchaser and the Merger Sub of any emergency or other
        change in the normal course of its or any of its subsidiaries' business
        or in the operation of its or any of its subsidiaries' properties and of
        any governmental or third party complaints, investigations or hearings
        (or communications indicating that the same may be contemplated) if such
        emergency, change, complaint, investigation or hearing would have a
        Company Material Adverse Effect, or would materially adversely affect
        any party's ability to consummate the transactions contemplated by this
        Agreement.

               (i) Neither the Company nor any of its subsidiaries shall adopt a
        plan of liquidation, dissolution, merger, consolidation, restructuring,
        recapitalization, or reorganization.

               (j) Neither the Company nor any of its subsidiaries shall make
        any material tax election or settle or compromise any material federal,
        state, local, or foreign tax liability, except in the ordinary course of
        business and consistent with past practice.

               (k) Except as contemplated by Section 6.3, the Company shall not
        modify or accelerate the exercisability of any stock options, rights or
        warrants presently outstanding, and shall not amend, change or waive (or
        exempt any person from the effect of) the Rights Agreement, except in
        the exercise of its fiduciary duties by the Board of Directors as set
        forth in Section 6.6(b) of this Agreement or as contemplated by Section
        4.19 hereof.


                                    ARTICLE 6

                              ADDITIONAL AGREEMENTS

        6.1 Action of Stockholders. The Company shall take all action necessary
in accordance with the Delaware Law and its Certificate of Incorporation and
By-Laws to convene a meeting of its stockholders promptly following consummation
of the Offer to consider and vote upon the Merger, if a stockholder vote is
required. If a stockholders' meeting is convened, the Board of Directors shall
recommend that the stockholders of the Company vote to approve the Merger. Such
recommendation shall not be withdrawn or adversely modified except by resolution
of the Board of Directors adopted in the exercise of applicable fiduciary duties
upon the advice of counsel. In the event that proxies are to be solicited from
the Company's stockholders, the Company shall, if and to the extent requested by
the Purchaser, use its best efforts to solicit from stockholders of the Company
proxies in favor of such approval and shall take all other reasonable action
necessary or, in the opinion of the Purchaser, helpful to secure a vote or
consent of stockholders in favor of the Merger, except where the Board of
Directors of the Company determines not to undertake such actions and efforts in
the exercise of its fiduciary duties as set forth in Section 6.6(b) hereof. At
any such meeting, the Purchaser shall vote or cause to be voted all of the
Shares then owned by the Purchaser or any subsidiary of the Purchaser in favor
of the Merger and the Company shall vote all Shares in favor of the Merger for
which proxies in the form distributed by the Company shall have been given and
with respect to which no contrary direction shall have been made.


                                       21


<PAGE>   22
        6.2 Proxy Statement. If a stockholder vote is required, the Company and
the Purchaser shall cooperate with each other and use all reasonable efforts to
prepare, and the Company and the Purchaser shall file with the Commission as
soon as reasonably practicable following consummation of the Offer and use their
best efforts to have cleared by the Commission, a proxy statement or information
statement, as appropriate, with respect to the approval of the Merger by the
Company's stockholders. The information provided and to be provided by the
Purchaser, the Merger Sub and the Company, respectively, for use in the proxy
statement or information statement shall be true and correct in all material
respects and shall not omit to state any material fact required to be stated
therein or necessary in order to make such information not misleading.

        6.3    Employee Benefits and Stock Options.

               (a) Acceleration and Cancellation. The Parent, the Purchaser, the
        Merger Sub and the Company hereby acknowledge and agree that the
        Surviving Corporation shall not assume or continue any outstanding stock
        options under the Stock Plans, or any other stock options, or substitute
        any additional options for such outstanding options. On or before the
        Effective Time, the Company shall, consistently with the terms of the
        Company's benefit plans and other agreements and arrangements evidencing
        the issuance of options, or to the extent permissible under applicable
        law, accelerate the unvested portion of all outstanding stock options,
        warrants or other rights to acquire Shares issued under employee benefit
        or nonemployee compensation plans or arrangements, conditioned upon the
        successful completion of the Merger. In lieu of exercising such stock
        options or warrants, each holder thereof shall, upon surrender for
        cancellation of the same to the Company on or before the Effective Time,
        be entitled to receive from the Company, subject to applicable
        withholding requirements, an amount in cash equal to the excess of (a)
        the product of the number of Shares covered by such stock options,
        warrants or other rights to acquire Shares multiplied by the Merger
        Consideration, over (b) the product of the number of Shares covered by
        such stock options, warrants or other rights to acquire Shares
        multiplied by the per-Share exercise, purchase or conversion price
        payable upon exercise, purchase or conversion of the same. Any
        outstanding stock options that shall not have been exercised or
        surrendered for payment in accordance with the preceding sentence shall
        terminate at the Effective Time, in accordance with the terms of the
        Stock Plans. The Company shall use its best efforts to obtain consent to
        the foregoing treatment by the holders of all outstanding options listed
        on Section 6.3(a) of the Disclosure Schedule.

               (b) Stock Purchase Plan. The Company shall take such actions, on
        or before the Effective Time, as are necessary to terminate the
        Company's Employee Stock Purchase Plan. After such termination, employee
        participants in such Employee Stock Purchase Plan shall not be permitted
        to continue to have the Company withhold any monies for investment in
        such Plan and each such employee shall be permitted to elect to receive
        invested cash or purchase Shares in accordance with the terms of such
        plan.


                                       22


<PAGE>   23
               (c) Employment Agreements and Severance Agreements. Parent shall
        cause the Company to honor without modification (except to the extent
        the same may be modified by mutual agreement between the parties and
        approved by the Purchaser) all employment agreements and severance
        agreements in effect prior to the date hereof between the Company and
        any employee of the Company, all of which, the Company hereby represents
        and warrants, have been disclosed in writing to Parent prior to the date
        hereof.

        6.4 Expenses. If (a) this Agreement is terminated by the Company
pursuant to Section 8.1(e)(iii) or Section 6.6(b), or (b) this Agreement is
terminated by the Purchaser pursuant to Section 8.1(c) or (c) this Agreement is
terminated pursuant to its terms for any reason other than a material breach of
this Agreement by the Parent or the Merger Sub, and in case of this clause (c)
within six months thereafter (x) a definitive agreement is entered into between
the Company and any person other than the Purchaser or any affiliate of the
Purchaser for the acquisition of all or substantially all the assets or a
majority of the capital stock of the Company, or for a merger, consolidation or
other reorganization of the Company at a price equivalent to a price per Share
in excess of $24.00 or (y) any person or "group" (as that term is used in
Section 13(d)(3) of the Exchange Act) other than the Purchaser or any affiliate
of the Purchaser shall have acquired by way of a public tender offer beneficial
ownership of 50% or more of the outstanding Shares at a price per Share in
excess of $24.00, the Company shall pay to Parent upon demand (by wire transfer
of immediately available federal funds to an account designated by Parent for
such purpose) the amount of $12.6 million to compensate Parent, the Purchaser
and the Merger Sub for taking actions to consummate this Agreement, to reimburse
them for the time and expense relating thereto and for other direct and indirect
costs (including lost opportunity costs) in connection with the transactions
contemplated herein. The Company acknowledges that the provisions set forth in
this section are an integral part of this Agreement that have been negotiated in
order to induce Parent, the Purchaser and the Merger Sub to enter into this
Agreement; accordingly, if the Company fails to promptly pay the amounts
referred to above, the Company shall in addition pay Parent all costs and
expenses (including attorneys' fees and expenses) incurred in collecting such
fees together with interest on the amount of such fees from the date such
payment was required to be made until such time as payment is received by Parent
at the rate of the lesser of (i) 10% per annum or (ii) the maximum rate
permitted by law. Payment of such amount by the Company along with any interest,
costs and expenses as may be required under this Section 6.4 shall constitute a
full and complete discharge of all obligations or liabilities of the Company
under this Paragraph; provided, however, that under no circumstances will the
Company be liable for more than one fee payable pursuant to this Section 6.4.

        In the event of any breach of the representations and warranties
contained in this Agreement by either party hereto (for purposes of this
Section, the parties to this Agreement shall mean Parent, the Purchaser and the
Merger Sub, on the one hand, and the Company, on the other hand), if the
nonbreaching party incurs damages caused by the breaching party, the breaching
party's aggregate liability for all such damages caused by all such breaches
shall not exceed $12.6 million.


                                       23


<PAGE>   24
        6.5 Additional Agreements. Subject to the terms and conditions provided
herein, each of the parties agrees to use its best efforts to take, or cause to
be taken, all action and to do, or cause to be done, all things necessary,
proper or advisable to consummate and make effective as promptly as practicable
the transactions contemplated by this Agreement, including using best efforts to
obtain all necessary waivers, consents and approvals and to effect all necessary
registrations and filings, including but not limited to filings under the
Hart-Scott-Rodino Act and submissions of information requested by governmental
authorities.

        6.6    No Solicitation.

               (a) Except as provided in Section 6.6(b) below, the Company
        agrees that from the date hereof until the Effective Time or the
        termination of this Agreement, the Company will not, directly or
        indirectly, through any officer, director, affiliate or agent of the
        Company, or otherwise, solicit, initiate, or encourage any proposals or
        offers from any person other than Parent or its affiliates (a "third
        party") relating to any possible acquisition of the Company or any of
        its subsidiaries (whether by way of merger, purchase of capital stock,
        purchase of assets or otherwise) or engage in any sale of any equity
        interest in or substantial assets of the Company or any of its
        subsidiaries (other than pursuant to the exercise of options outstanding
        on the date hereof) to a third party (an "Alternative Acquisition"); nor
        will the Company participate in any negotiations regarding, or furnish
        to any person any information with respect to, or otherwise cooperate
        with, facilitate or encourage any effort or attempt by any person to do
        or seek, any Alternative Acquisition.

               (b) Notwithstanding the foregoing, in the event that (i) the
        Company shall receive a written proposal from a third party relating to
        an Alternative Acquisition (which proposal may or may not be subject to
        confirmatory due diligence), (ii) the Company shall have notified Parent
        in writing of its receipt of such proposal and (iii) the Board of
        Directors, upon the advice of independent counsel, reasonably believes
        that the failure to do so would constitute a breach of its fiduciary
        duties (it being understood for this purpose that the failure to respond
        to an Acquisition Alternative which in the judgment of the Company's
        Board of Directors and its financial advisor is superior, from a
        financial point of view, to the Company's stockholders may be deemed to
        be a breach of such duty), then thereafter the Company shall be entitled
        to negotiate and provide information to such third party.
        Notwithstanding the immediately preceding sentence, this Section 6.6
        will not be violated and, without more, the Company shall be permitted
        to negotiate and provide information to any third party that provides a
        written proposal for an Alternative Acquisition if such written proposal
        indicates that the proposed Alternative Acquisition (i) is fully
        financed, (ii) provides for a purchase price which will be paid entirely
        in cash, for all outstanding Shares and at a price per Share greater
        than the price per Share set forth in Section 1.1 hereof and (iii) sets
        forth material terms which taken as a whole are no less favorable to the
        Company than the terms set forth in this Agreement, and the Company
        shall have first notified the Parent in writing of its receipt of such
        proposal and the terms thereof. In addition, in the event that any such
        proposal, including the financing thereof, has been determined by the
        Board of Directors of the Company based upon the 


                                       24


<PAGE>   25
        written opinion of its outside financial advisors to be on terms
        financially superior to the Company's stockholders as compared with the
        Offer and the Merger (a "Bona Fide Offer"), the Company may terminate
        this Agreement and accept such Bona Fide Offer upon the payment to
        Parent of the fee provided in Section 6.4.

               (c) Notwithstanding the provisions of the sixth paragraph of the
        Confidentiality Agreement (the "standstill provisions"), (i) following
        any notification to Parent of a written proposal that permits the
        Company to negotiate with and furnish information to any third party in
        accordance with Section 6.6(b) hereof, and until any Alternative
        Transaction resulting from such proposal shall have either been
        consummated or the Company shall have received written notification that
        any such third party shall no longer seek to engage in an Alternative
        Transaction with or involving the Company, the Parent shall be entitled
        to propose or present to the Company any offer in response to such third
        party's offer, and (ii) if, from the date hereof until the Effective
        Time or the termination of this Agreement, any third party shall
        announce its intention to commence, or shall commence, any tender offer
        to acquire Shares, Parent and the Purchaser shall be entitled to make
        any public announcement or proposal, or to take any other action it or
        they may deem appropriate, in response to such announcement or tender
        offer.

        6.7 Notification of Certain Matters. Each party shall give prompt notice
to the others of (a) the occurrence or failure to occur of any event, which
occurrence or failure would be likely to cause any representation or warranty on
its part contained in this Agreement to be untrue or inaccurate in any material
respect at any time from the date hereof to the Effective Time, and (b) any
material failure of such party, or any officer, director, employee or agent
thereof, to comply with or satisfy any covenant, condition or agreement to be
complied with or satisfied by it hereunder.

        6.8 Access to Information. From the date hereof to the Effective Time,
the Company shall, and shall cause its subsidiaries, officers, directors,
employees and agents (including lenders, attorneys and accountants) to afford
the Parent and the Purchaser complete access at all reasonable times to its
officers, employees, agents, properties, books and records, and shall furnish
Parent and the Purchaser all financial, operating, personnel, compensation, tax
and other data and information as the Purchaser, through its officers, employees
or agents, may reasonably request. All of such information shall be treated as
"Evaluation Material" pursuant to the terms of the Confidentiality Agreement.

        6.9 Stockholder Claims. The Company shall not settle or compromise any
claim brought by any present, former or purported holder of any securities of
the Company in connection with the Merger prior to the Effective Time without
the prior written consent of the Purchaser.

        6.10   Indemnification.

               (a) The By-Laws of the Company as the Surviving Corporation shall
        contain the provisions with respect to indemnification set forth in
        Article XI of the By-Laws 


                                       25


<PAGE>   26
        of the Company. Such provisions in the By-Laws of the Company and the
        Surviving Corporation shall not be amended, repealed or otherwise
        modified for a period of six years from the date Parent, the Purchaser
        or the Merger Sub acquires a majority of the Shares in any manner that
        would adversely affect the rights thereunder of individuals who at or
        prior to the Effective Time were directors, officers, employees or
        agents of the Company, unless such modification is required by law.

               (b) Purchaser shall cause the Surviving Corporation to use its
        reasonable best efforts to maintain in effect for six years from the
        Effective Time, if available, the coverage provided by the current
        directors' and officers' liability insurance policies maintained by the
        Company (provided that the Surviving Corporation may substitute therefor
        policies of at least the same coverage containing terms and conditions
        which are not materially less favorable) with respect to matters
        occurring prior to the Effective Time; provided, however, that nothing
        contained herein shall require the Surviving Corporation to incur any
        annual premium in excess of 120% of the last annual aggregate premium
        paid prior to the date of this Agreement for all current directors' and
        officers' liability insurance policies maintained by the Company which
        the Company represents and warrants to be $300,000 (the "Current
        Premium"). If such premiums for such insurance would at any time exceed
        120% of the Current Premium, then the Surviving Corporation shall cause
        to be maintained policies of insurance which, in the Surviving
        Corporation's good faith determination, provide the maximum coverage
        available at an annual premium equal to 120% of the Current Premium.

               (c) In the event the Company as the Surviving Corporation or any
        of its successors or assigns (i) consolidates with or merges into any
        other person and shall not be the continuing or surviving corporation or
        entity of such consolidation or merger or (ii) transfers all or
        substantially all of its properties and assets to any person, then and
        in each such case, proper provisions shall be made so that the
        successors and assigns of the Surviving Corporation, or at Parent's
        option, Parent, shall assume the obligations set forth in this Section
        6.10. Parent further agrees to assume the obligations set forth in this
        Section 6.10 and the obligations of the Surviving Corporation under the
        indemnification obligations of the Company referenced in paragraph (a)
        of this Section 6.10 during any period of time in which the net worth of
        the Surviving Corporation, without giving effect to any accounting or
        other changes in the Company's net worth resulting solely from the
        Merger, shall be less than 80% of the net worth of the Company
        immediately prior to the Merger by reason of dividends or distributions
        by the Company to the Parent or any of its affiliates.

               (d) This Section 6.10 shall survive the Effective Time, is
        intended to benefit the Company, the Surviving Corporation and each of
        the persons referred to in paragraph (a) of this Section and shall be
        binding on all successors and assigns of the Surviving Corporation.

        6.11 Conversion to Merger. In the event any of the conditions set forth
in Annex I shall occur, the Parent, the Purchaser and the Merger Sub shall have
the right to terminate the 


                                       26


<PAGE>   27
Offer. In the event the Offer is terminated, the Parent, the Purchaser and the
Merger Sub shall have the right, but not the obligation, to notify the Company
that it or they desire, subject to the prior written approval of the Board of
Directors of the Company, to seek the approval of the Company's stockholders for
the Merger pursuant to Delaware Law. Unless the Board of Directors shall
determine, upon the advice of counsel, that such actions would have a material
adverse economic effect on the Company's stockholders, or that cooperation by
the Company would constitute a breach of fiduciary duty by the Company's Board
of Directors, the Company shall take all necessary actions, pursuant to Sections
6.1 and 6.2 hereto and otherwise, to obtain stockholder approval and to
accomplish the Merger in accordance with this Agreement, except in the exercise
of its fiduciary duties by the Board of Directors of the Company as set forth in
Section 6.6(b) hereof.

        6.12 Consents. The Company shall use its reasonable best efforts to
obtain, without the payment of any fee or compensation without the written
approval of the Parent or the Purchaser, consents to the Offer, the Merger, and
the transactions contemplated by this Agreement from the other parties to the
agreements listed on Section 6.12 of the Disclosure Schedule.

                                    ARTICLE 7

                                   CONDITIONS

        7.1 Conditions to Obligations of Each Party to Effect the Merger. The
respective obligations of each party to effect the Merger shall be subject to
the fulfillment at or prior to the Effective Time of the following conditions:

               (a) The Merger shall have been approved and adopted by the vote
        of the stockholders of the Company to the extent required by Delaware
        Law;

               (b) All waiting, review and investigation periods (and any
        extension thereof) applicable to the consummation of the Merger under
        the Hart-Scott-Rodino Act shall have expired or been terminated;

               (c) There shall have been no law, statute, rule or order,
        domestic or foreign, enacted or promulgated which would make
        consummation of the Merger illegal; and

               (d) No injunction or other order entered by a United States
        (state or federal) court of competent jurisdiction shall have been
        issued and remain in effect which would prohibit consummation of the
        Merger.

        7.2 Additional Conditions to Obligations of Parent, the Purchaser and
the Merger Sub. The obligations of Parent, the Purchaser and the Merger Sub to
effect the Merger after termination of the Offer in accordance with Section 6.11
are also subject to the following conditions:


                                       27


<PAGE>   28
               (a) The representations and warranties of the Company contained
        in this Agreement shall have been true and correct in all material
        respects when made.

               (b) There shall not have occurred, after the date hereof, any
        event, condition or state of facts, which has resulted, or is reasonably
        likely to result, in (i) a Company Material Adverse Effect or (ii) a
        material adverse effect on the ability of Parent, the Purchaser or the
        Merger Sub to consummate the Merger.

               (c) The Company's stockholders shall have approved and adopted
        the Merger and this Agreement in accordance with Delaware Law.

               (d) All rights to acquire shares of the Company Common Stock as
        described in Section 4.3 hereof shall have been exercised, canceled or
        terminated prior to or concurrently with the Effective Time.

               (e) There shall not be pending or threatened any action,
        proceeding or investigation by any court or governmental or regulatory
        authority or body (i) challenging or seeking damages in connection with
        the Merger, (ii) seeking to require the divestiture by Parent, the
        Purchaser or the Company or any of their respective affiliates of shares
        of Company Common Stock or any business, asset or property of Parent or
        the Company or any of their respective affiliates, or (iii) seeking to
        restrain or prohibit the consummation of the Merger or otherwise limit
        the right of Parent, or its subsidiaries to transact business with the
        Company or otherwise own or operate in the current manner all or any
        portion of the businesses or assets of the Company or its subsidiaries,
        which, in either case, is reasonably likely to have a Company Material
        Adverse Effect prior to or after the Effective Time, or to subject the
        Company, Parent, Purchaser, Merger Sub or any of their respective
        subsidiaries or any of their respective officers or directors to
        substantial penalties or criminal liability.


                                    ARTICLE 8

                        TERMINATION, AMENDMENT AND WAIVER

        8.1 Termination. This Agreement may be terminated at any time prior to
the consummation of the Offer (or, if the Offer is terminated and thereafter
Parent and the Purchaser shall seek stockholder approval of the Merger in
accordance with Section 6.11 hereof (a "Subsequent Merger"), the Effective
Time):

               (a) By mutual consent of the Boards of Directors of Parent and
        the Company;

               (b) By either the Purchaser or the Company if the Offer shall not
        have been consummated on or before May 31, 1998, or a Subsequent Merger
        shall not have occurred by September 30, 1998; provided, however, that a
        party shall not be entitled to 


                                       28


<PAGE>   29
        terminate this Agreement pursuant to this Section 8.1(b) if it is in
        material breach of its obligations under this Agreement;

               (c) By the Purchaser if the Board of Directors of the Company
        shall have withdrawn or adversely modified either of its recommendations
        referred to in Sections 1.2 and 6.1; provided, that a finding by the
        Board that an Alternative Acquisition may be superior from a financial
        point of view for purposes of Section 6.6(b) shall not be deemed a
        withdrawal or adverse modification of its recommendation referred to in
        this Section 8.1(c) unless such finding shall be stated publicly or
        otherwise disseminated;

               (d) By the Purchaser prior to the purchase of Shares pursuant to
        the Offer in the event any of the conditions to the Offer set forth in
        Annex I shall have occurred; or

               (e) By the Company if any of (i) the Offer shall not have been
        commenced substantially in accordance with Section 1.1; or (ii) the
        Offer shall have expired or been terminated without any Shares having
        been purchased thereunder; or (iii) if a tender offer for Shares is
        commenced by a person or entity, or the Company receives an offer for an
        Alternative Acquisition, any of which the Board of Directors determines,
        in the exercise of its fiduciary duties and subject to compliance with
        Section 6.6(b), makes necessary or advisable the termination of this
        Agreement; provided that the provisions of Sections 6.4 and 6.6(c) shall
        survive termination of the Agreement pursuant to this clause (e)(iii).

        8.2 Amendment. This Agreement may not be amended except by an instrument
in writing approved by the parties to this Agreement and signed on behalf of
each of the parties hereto; provided, however, that after approval of the Merger
by the stockholders of the Company (if such approval is required), no amendment
may be made which changes the amount into which each Share will be converted or
effects any change which would materially and adversely affect the stockholders
of the Company without the further approval of the stockholders of the Company.

        8.3 Waiver. Subject to applicable law and the provisions of this
Agreement, at any time prior to the Effective Time, any party hereto may (a)
extend the time for the performance of any of the obligations or other acts of
any other party hereto, or (b) waive compliance with any of the agreements of
any other party or with any conditions to its own obligations, in each case only
to the extent such obligations, agreements and conditions are intended for its
benefit. For the purposes of this Section 8, Parent, the Purchaser and the
Merger Sub shall be considered to be a single party.

        8.4 Effect of Termination. In the event of termination of this Agreement
as provided in Section 8.1, (a) this Agreement shall become void and there shall
be no liability or further obligation on the part of the Parent, the Purchaser,
the Merger Sub or the Company or their respective stockholders, officers or
directors, except as set forth in Section 6.4, in the last sentence of Section
1.2(c) hereof, and in Section 8.1(e) hereof, and (b) the Purchaser and the
Merger Sub shall terminate the Offer, if still pending, without purchasing any
Shares thereunder.


                                       29


<PAGE>   30
                                    ARTICLE 9

                               GENERAL PROVISIONS

        9.l Public Statements. Except as required by applicable law, neither
Parent, the Purchaser or the Merger Sub, on the one hand, nor the Company, on
the other hand, shall make any public announcement or statement with respect to
the Offer, the Merger, this Agreement or the transactions contemplated hereby,
without the approval of the Company or the Purchaser, respectively. The parties
hereto agree to consult with each other prior to issuing each public
announcement or statement with respect to the Offer, the Merger, this Agreement
or the transactions contemplated hereby.

        9.2 Notices. All notices and other communications hereunder shall be in
writing and sent by hand delivery, facsimile transmission (with confirmation of
receipt), or nationally recognized overnight courier service (with proof of
delivery), to the parties at the addresses set forth below (or at such other
address for a party as shall be specified by like notice):

        (a)    if to Parent, the Purchaser or the Merger Sub:

                      Siebe plc
                      Saxon House
                      2-4 Victoria Street
                      Windsor, Berkshire SL4
                      England
                      Attention:   Company Secretary
                      Telephone:  44-1753-839-229
                      Facsimile:   44-1753-622-030

               with copies to:

                      Fried, Frank, Harris, Shriver & Jacobson
                      350 South Grand Avenue, 32nd Floor
                      Los Angeles, CA 90071
                      Attention:   David K. Robbins, Esq.
                      Telephone:  (213) 473-2000
                      Facsimile:   (213) 473-2222


                                       30


<PAGE>   31
               (b)    if to the Company:

                      Wonderware Corporation
                      100 Technology Drive
                      Irvine, CA 92618
                      Attention:   Chief Financial Officer
                      Telephone:  (714) 727-3200
                      Facsimile:   (714) 453-6509

               with copies to:

                      Wonderware Corporation
                      100 Technology Drive
                      Irvine, CA 92618
                      Attention:   General Counsel
                      Telephone:  (714) 727-3200
                      Facsimile:   (714) 453-6509


                      Cooley Godward LLP
                      4365 Executive Drive, Suite 1100
                      San Diego, CA  92121-2128
                      Attention:   D. Bradley Peck, Esq.
                      Telephone:  (619) 550-6000
                      Facsimile:   (619) 453-3555

        9.3 Interpretation. When a reference is made in this Agreement to
subsidiaries of the Purchaser or the Company, the word "subsidiaries" means any
"majority-owned subsidiary" (as defined in Rule 12b-2 under the Exchange Act) of
the Purchaser or the Company, as the case may be; provided, however, that the
Company shall in no event and at no time be considered a subsidiary of the
Purchaser for purposes of this Agreement. As used herein, the term "person"
means an individual, a partnership, a corporation, an association, a joint stock
company, a trust, a joint venture, an unincorporated organization or other
entity. The headings contained in this Agreement are for reference purposes only
and shall not affect in any way the meaning or interpretation of this Agreement.
References to Sections and Articles refer to sections and articles of this
Agreement unless otherwise stated.

        9.4 Severability. If any term, provision, covenant or restriction of
this Agreement is held by a court of competent jurisdiction to be invalid, void
or enforceable, the remainder of the terms, provisions, covenants, and
restrictions of this Agreement shall remain in full force and effect and shall
in no way be affected, impaired or invalidated and the parties shall negotiate
in good faith to modify the Agreement to preserve each party's anticipated
benefits under the Agreement.


                                       31


<PAGE>   32
        9.5 Miscellaneous. This Agreement (together with all other documents and
instruments referred to herein, including the Confidentiality Agreement except
as expressly provided in Section 6.6(c) hereof): (a) constitutes the entire
agreement and supersedes all other prior agreements and undertakings, both
written and oral, among the parties with respect to the subject matter hereof;
(b) is not intended to confer upon any other person any rights or remedies
hereunder; (c) shall not be assigned by operation of law or otherwise, except
that the Purchaser and the Merger Sub may assign all or any portion of their
rights under this Agreement to any direct or indirect wholly-owned subsidiary of
Parent, but no such assignment shall relieve the Purchaser and the Merger Sub of
their obligations hereunder, and except that this Agreement may be assigned by
operation of law to any corporation with or into which the Purchaser may be
merged; and (d) shall be governed in all respects, including validity,
interpretation and effect, by the internal laws of the State of Delaware,
without giving effect to the principles of conflict of laws thereof. This
Agreement may be executed in two or more counterparts which together shall
constitute a single agreement.

        9.6 Survival of Representations and Warranties. The representations and
warranties of the parties set forth herein shall be deemed to be continuing as
if made as of the date of any determination hereunder; provided, however, that
such representations and warranties shall terminate as of the time Parent, the
Purchaser or the Merger Sub acquires more than a majority of the then
outstanding Shares, or upon the termination of this Agreement pursuant to
Section 8.1.


                                       32


<PAGE>   33
        IN WITNESS WHEREOF, Parent, the Purchaser, the Merger Sub and the
Company have caused this Agreement and Plan of Merger to be executed as of the
date first written above by their respective officers thereunder duly
authorized.

                                    SIEBE PLC


                                    By:   /s/ Colin P. Bonsey
                                          -------------------------------
                                          Colin P. Bonsey
                                          Director


                                    WDR ACQUISITION CORP.


                                    By:   /s/ James C. Bays
                                          -------------------------------
                                          James C. Bays
                                          President


                                    WDR SUB CORP.


                                    By:   /s/ James C. Bays
                                          -------------------------------
                                          James C. Bays
                                          President


                                    WONDERWARE CORPORATION


                                    By:   /s/ Roy H. Slavin
                                          -------------------------------
                                          Roy H. Slavin
                                          Chairman of the Board,
                                          President and Chief Executive Officer


<PAGE>   34
                                     ANNEX I
                             CONDITIONS TO THE OFFER

        Notwithstanding any other provision of the Agreement and Plan of Merger
(the "Agreement") or the Offer, neither the Purchaser nor the Merger Sub shall
be required to commence or continue the Offer or accept for payment, purchase or
pay for any Shares tendered, or may postpone the acceptance, purchase or payment
for Shares, or may amend (to the extent permitted by the Agreement) or terminate
the Offer (1) if the Minimum Condition is not satisfied as of the expiration of
the Offer; (2) any applicable waiting period under the Hart-Scott-Rodino Act in
respect of the Offer shall not have expired or been terminated prior to the
expiration of the Offer (provided, however, that the Purchaser and the Merger
Sub shall extend the expiration date of the Offer from time to time until May
31, 1998, if, when and as necessary to satisfy any request by the Federal Trade
Commission or the United States Department of Justice for additional information
under the Hart-Scott-Rodino Act) or (3) if, at any time on or after February __,
1998 and prior to the time of payment for any such Shares (whether or not any
Shares have theretofore been accepted for payment or paid for pursuant to the
Offer), any of the following events shall have occurred (each of paragraphs (a)
through (h) providing a separate and independent condition to the obligations of
the Purchaser and the Merger Sub pursuant to the Offer):

               (a) the Company or any subsidiary of the Company shall have
        authorized, recommended or proposed, or shall have announced an
        intention to authorize, recommend or propose, or shall have entered into
        an agreement or agreement in principle with respect to, any merger,
        consolidation or business combination (other than the Merger), any
        acquisition or disposition of a material amount of assets or securities
        or any material change in its capitalization, or the Company's board of
        directors shall have withdrawn or adversely modified (including by
        amendment to the Schedule 14D-9) its favorable recommendations with
        respect to the Offer and the Merger, or any corporation, entity, "group"
        or "person" (as defined in the Exchange Act) other than Parent, the
        Purchaser or the Merger Sub, shall have acquired beneficial ownership of
        more than 50% of the outstanding Shares;

               (b) the Company or any of its subsidiaries shall have authorized,
        recommended or proposed, or shall have announced an intention to
        authorize, recommend or propose, or shall have entered into an agreement
        or agreement in principle with respect to, any release or relinquishment
        of any material contract rights not in the ordinary course of business,
        which release or relinquishment would have a Company Material Adverse
        Effect.

               (c) there shall be instituted or pending any action, litigation,
        proceeding, investigation or other application (hereinafter, an
        "Action") before any court of competent jurisdiction or other
        governmental entity by any governmental entity that is reasonably likely
        to: (i) result in a restriction or prohibition on the consummation of
        the transactions contemplated by the Offer or the Merger; (ii) prohibit,
        or impose any material limitations on Purchaser's or Merger Sub's
        ownership or operation of all or a material portion of their 


<PAGE>   35
        or the Company's business or assets, or to compel Purchaser or Merger
        Sub to dispose of or hold separate all or a material portion of
        Purchaser's or Merger Sub's or the Company's business or assets; (iii)
        make the acceptance for payment of, purchase of, or payment for, some or
        all of the Shares illegal or rendering Purchaser or Merger Sub unable
        to, or restricting or prohibiting, the ability of Purchaser or Merger
        Sub to accept for payment, purchase or pay for some or all of the
        Shares; or (iv) impose material limitations on the ability of Purchaser
        or Merger Sub effectively to acquire or hold or to exercise full rights
        of ownership of the Shares including, without limitation, the right to
        vote the Shares purchased by them on an equal basis with all other
        Shares on all matters properly presented to the stockholders of the
        Company;

               (d) any statute, rule, regulation, order or injunction shall be
        enacted, promulgated, entered, enforced or deemed to or become
        applicable to the Offer or the Merger that results in any of the
        consequences referred to in clauses (i) through (iv) of paragraph (c)
        above;

               (e) there shall have occurred (i) any general suspension of, or
        limitation on prices for, trading in securities on any national
        securities exchange or in the over the counter market in the United
        States or on the London Stock Exchange, (ii) the declaration of a
        banking moratorium or any suspension of payments in respect of banks in
        the United States or the United Kingdom, (iii) the commencement of war,
        armed hostilities or other military action, or other international or
        national calamity, having a Company Material Adverse Effect, (iv) any
        limitation by any governmental authority on, or any other event which
        might materially adversely affect, the extension of credit by banks or
        other lending institutions in the United States or the United Kingdom,
        (v) from the date of this Agreement through the close of business on the
        business day immediately prior to the date of termination or scheduled
        expiration of the Offer, a decline of at least 25% in the Standard &
        Poor's 500 Index, or (vi) in the case of any of the foregoing existing
        at the time of the commencement of the Offer, a material acceleration or
        worsening thereof;

               (f) except as set forth in the SEC Reports or the Disclosure
        Schedule, any change shall have occurred which individually or in the
        aggregate had, is continuing to have, or is reasonably likely to have a
        Company Material Adverse Effect;

               (g) the representations and warranties of the Company in the
        Agreement shall not have been true and correct in all material respects
        when made, or the Company shall not have performed in all material
        respects each material covenant and complied with each material
        agreement to be performed and complied with by it under the Agreement;
        provided that if the breach of any such covenant or agreement is cured
        within 5 calendar days after notice by the Purchaser of its intent to
        terminate the Offer or if the breach shall not have a Company Material
        Adverse Effect or a material adverse effect on the ability of Parent or
        the Purchaser to consummate the Offer, the Merger, or the transactions
        contemplated by this Agreement, the Purchaser shall not terminate the
        Offer;


<PAGE>   36
               (h) the Company and the Purchaser shall have reached an agreement
        or understanding regarding termination of the Offer or the Agreement
        shall have been terminated in accordance with its terms; or

               (i) all governmental consents required to be obtained in
        connection with the purchase of Shares pursuant to the Offer shall not
        have been obtained prior to expiration of the Offer or any governmental
        agency shall have announced an intention to seek to prohibit or
        interfere with the purchase of Shares pursuant to the Offer;

which, in the good faith judgment of the Purchaser, in any such case, and
regardless of the circumstances giving rise to any such condition, make it
inadvisable to proceed with acceptance for payment or purchase of or payment for
the Shares.

        The foregoing conditions are for the sole benefit of the Purchaser and
Parent and may be asserted by the Purchaser and Parent regardless of the
circumstances giving rise to such conditions, or may be waived by the Purchaser
or the Merger Sub in whole at any time or in part from time to time in their
sole discretion. The failure by the Purchaser or the Parent at any time to
exercise any of the foregoing rights shall not be deemed a waiver of any such
right and each such right shall be deemed an ongoing right and may be asserted
at any time and from time to time.










<PAGE>   1
                          INDEX TO FINANCIAL STATEMENTS

<TABLE>
<CAPTION>
                                                                                PAGE
                                                                                ----
<S>                                                                             <C>
Independent Auditors' Report.................................................... F-2

Audited Consolidated Financial Statements:
    Audited Consolidated Profit and Loss Account for the years ended 
    April 5, 1997 and April 6, 1996............................................. F-3

    Audited Consolidated Balance Sheet as of April 5, 1997 and April 6, 1996.... F-4

    Audited Consolidated Cash Flow Statement for the years ended 
    April 5, 1997 and April 6, 1996............................................. F-5

    Audited Consolidated Statement of Total Recognized Gains and 
    Losses for the years ended April 5, 1997 and April 6, 1996.................. F-6

    Audited Reconciliation of Movements in Consolidated Shareholders' 
    Funds for the years ended April 5, 1997 and April 6, 1996................... F-6

    Audited Company Balance Sheet as of April 5, 1997 and April 6, 1996......... F-7

    Accounting Policies......................................................... F-8

    Notes to the Accounts....................................................... F-10

Unaudited Interim Consolidated Financial Statements:

    Unaudited Consolidated Profit and Loss Account for the six months ended
    September 30, 1997 and September 30, 1996................................... F-35

    Unaudited Consolidated Balance Sheet as of September 30, 1997, 
    September 30, 1996 and April 5, 1997........................................ F-36

    Unaudited Consolidated Cash Flow Statement for the six months ended
    September 30, 1997 and 1996................................................. F-37

    Unaudited Consolidated Statement of Total Recognized Gains and Losses for
    the six months ended September 30, 1997 and 1996............................ F-38

    Unaudited Reconciliation of Movements in Consolidated Shareholders'
    Funds for the six months ended September 30, 1997 and 1996.................. F-38

    Unaudited Notes to the Interim Consolidated Financial Statements............ F-39
</TABLE>



                                      F-1
<PAGE>   2
INDEPENDENT AUDITORS' REPORT

The Board of Directors
Siebe plc:

    We have audited the consolidated financial statements of Siebe plc and its
subsidiaries as listed in the accompanying "Index to Financial Statements --
Audited Consolidated Financial Statements" on page F-1. These consolidated
financial statements are the responsibility of the management of Siebe plc. Our
responsibility is to express an opinion on these consolidated financial
statements based on our audits.

    We conducted our audits in accordance with Auditing Standards issued by the
Auditing Practices Board in the United Kingdom. Those standards require that we
plan and perform the audit to obtain reasonable assurance about whether the
financial statements are free of material misstatement. An audit includes
examining, on a test basis, evidence supporting the amounts and disclosures in
the financial statements. An audit also includes assessing the accounting
principles used and significant estimates made by management, as well as
evaluating the overall financial statement presentation. We believe that our
audits provide a reasonable basis for our opinion.

    In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of Siebe plc and its
subsidiaries as at April 5, 1997 and April 6, 1996, and the results of their
operations and their cash flows for the years then ended, in conformity with
generally accepted accounting principles in the United Kingdom.

KPMG AUDIT PLC
Chartered Accountants and Registered Auditors
London, England
May 28, 1997


                                      F-2
<PAGE>   3
                  AUDITED CONSOLIDATED PROFIT AND LOSS ACCOUNT


<TABLE>
<CAPTION>
FOR THE FISCAL YEARS ENDED 5 APRIL 1997 AND 6 APRIL 1996    NOTES        1997          1996
- --------------------------------------------------------    -----        ----          ----
                                                                        (POUND)M     (POUND)M
<S>                                                         <C>         <C>           <C>    
TURNOVER
 -  continuing operations.............................                  2,585.8       2,599.1
 -  acquisitions......................................                    419.5          --
                                                                        -------       -------

                                                              2         3,005.3       2,599.1
Net operating charges.................................        3        (2,535.4)     (2,227.9)
OPERATING PROFIT
 -  continuing operations.............................                    415.9         371.2
 -  acquisitions......................................                     54.0          --
                                                                        -------       -------

                                                                          469.9         371.2
Profit on sale of fixed assets........................                      5.2           3.8
Profit on sale of businesses..........................                      7.0           4.4
                                                                        -------       -------

PROFIT ON ORDINARY ACTIVITIES BEFORE INTEREST.........        2           482.1         379.4
Interest receivable...................................                      7.1           8.8
Interest payable and similar charges..................        6           (65.1)        (57.1)
                                                                        -------       -------

PROFIT ON ORDINARY ACTIVITIES BEFORE TAXATION.........        6           424.1         331.1
Tax on profit on ordinary activities..................        8          (156.9)       (126.8)
                                                                        -------       -------

PROFIT ON ORDINARY ACTIVITIES AFTER TAXATION..........                    267.2         204.3
Minority interests - equity...........................                    (13.4)        (11.3)
                                                                        -------       -------

PROFIT ATTRIBUTABLE TO MEMBERS OF SIEBE PLC...........        9           253.8         193.0
Dividends on equity shares............................       10           (73.4)        (57.2)
                                                                        -------       -------

TRANSFER TO REVENUE RESERVE...........................                    180.4         135.8
                                                                        =======       =======

Earnings per share....................................       11            54.1p         45.0p
                                                                        =======       =======
</TABLE>



                                      F-3
<PAGE>   4
                       AUDITED CONSOLIDATED BALANCE SHEET


<TABLE>
<CAPTION>
AT 5 APRIL 1997 AND AT 6 APRIL 1996                          NOTES        1997     1996
- -----------------------------------                          -----        ----     ----
                                                                        (POUND)M  (POUND)M
<S>                                                          <C>        <C>         <C>  
FIXED ASSETS
Intangible assets.....................................        12          429.6     359.7
Tangible assets.......................................        13        1,083.6     954.1
Investments...........................................        14           19.2     109.9
                                                                        -------   -------
                                                                        1,532.4   1,423.7
                                                                        -------   -------
CURRENT ASSETS
Stocks................................................        15          500.7     489.3
Debtors...............................................        16          906.3     751.0
Cash and deposits.....................................        27          210.8     282.3
                                                                        -------   -------
                                                                        1,617.8   1,522.6
Creditors:
Amounts falling due within one year:
Short-term borrowings.................................        17          (77.2)    (83.2)
Other creditors.......................................        17         (873.2)   (749.3)
                                                                        -------   -------
                                                                         (950.4)   (832.5)
                                                                        -------   -------
NET CURRENT ASSETS....................................                    667.4     690.1
                                                                        -------   -------
TOTAL ASSETS LESS CURRENT LIABILITIES.................                  2,199.8   2,113.8

Creditors:
Amounts falling due after more than one year:
Loans and other borrowings............................        18         (698.0)   (631.4)
Other creditors.......................................                    (59.2)    (47.8)
                                                                        -------   -------
                                                                         (757.2)   (679.2)
                                                                        -------   -------
Provisions for liabilities and charges................        21         (294.6)   (293.2)
                                                                        -------   -------
                                                                        1,148.0   1,141.4
                                                                        =======   =======
CAPITAL AND RESERVES
Called up share capital...............................        22          118.4     107.2
Share premium account.................................        23          389.2     385.2
Other reserves........................................        23         (146.6)     11.6
Revenue reserve.......................................        23          655.6     558.3
                                                                        -------   -------
SHAREHOLDERS' FUNDS - EQUITY..........................                  1,016.6   1,062.3
MINORITY INTERESTS - EQUITY...........................                    131.4      79.1
                                                                        -------   -------
                                                                        1,148.0   1,141.4
                                                                        =======   =======
</TABLE>



                                      F-4
<PAGE>   5
                    AUDITED CONSOLIDATED CASH FLOW STATEMENT

<TABLE>
<CAPTION>

FOR THE FISCAL YEARS ENDED 5 APRIL 1997 AND 6 APRIL 1996   NOTES      1997      1997       1996        1996
- --------------------------------------------------------   -----      ----      ----       ----        ----
                                                                    (POUND)    (POUND)    (POUND)     (POUND)
                                                                       M          M         M            M
<S>                                                        <C>       <C>       <C>        <C>         <C>
OPERATING ACTIVITIES                                                                     
NET CASH INFLOW FROM OPERATING ACTIVITIES.............      27                  522.0                 437.1
RETURNS ON INVESTMENTS AND SERVICING OF FINANCE                                          
Interest received.....................................                  7.3                  8.7
Interest paid.........................................                (59.3)               (53.4)
Interest element of finance lease rentals payments....                 (3.5)                (4.0)
Dividends paid to minority interests..................                 (1.9)                (1.2)
Dividends paid to former Unitech shareholders.........                 (3.0)                 --
                                                                     -------              -----
                                                                                (60.4)                (49.9)
TAXATION..............................................                          (88.6)                (75.9)
                                                                                         
CAPITAL EXPENDITURE AND FINANCIAL INVESTMENTS.........                                   
Purchase of tangible and intangible fixed assets......               (241.7)              (184.0)
Sale of tangible and intangible fixed assets..........                 43.9                 37.7
Purchase of trade investments.........................                 (4.9)              (104.6)
Sale of trade investment..............................                  2.5                  1.9
                                                                     ------               ------
ACQUISITIONS AND DISPOSALS............................                         (200.2)               (249.0)
Purchase of associated undertakings...................                  --                  (1.1)
Sale of associated undertakings.......................                  0.6                   --
Purchase of subsidiary undertakings (net of                                              
  shares issued)                                            27       (157.8)              (101.2)
Net overdrafts and cash acquired......................                (35.7)                 4.8
Cash in subsidiary undertakings sold..................                 (0.3)                17.5
Purchase of minority interests........................                                   
                                                                       (9.0)                (5.5)
                                                                     ------               ------
                                                                               (202.2)                (85.5)
EQUITY DIVIDENDS PAID.................................                          (54.0)                (48.5)
                                                                                         
MANAGEMENT OF LIQUID RESOURCES........................                                   
Movement in short-term deposits.......................                           (2.8)                  0.6
                                                                                         
FINANCING                                                                                
Issue of ordinary share capital.......................                  4.1                  0.6
                                                                                         
Debts due within one year:                                                               
   Loans raised.......................................                 43.1                 11.3
   Net loans repaid...................................                (63.5)               (65.8)
                                                                                         
Debts due after more than one year:                                                      
   New unsecured loan notes repayable in 2007.........                157.2                  --
   Other loans raised.................................                  --                 794.0
   Net loans repaid...................................               (101.1)              (640.2)
Capital element of finance lease repayments...........               (13.5)               (18.4)                    
                                                                     ------               ------ 
                                                                                 26.3                  81.5
                                                                               ------                ------
(DECREASE)/INCREASE IN CASH...........................      27                  (59.9)                 10.4
                                                                               ======                ====== 
</TABLE>



                                      F-5
<PAGE>   6
       AUDITED CONSOLIDATED STATEMENT OF TOTAL RECOGNIZED GAINS AND LOSSES


<TABLE>
<CAPTION>
FOR THE FISCAL YEARS ENDED 5 APRIL 1997 AND 6 APRIL 1996          NOTES      1997       1996
- --------------------------------------------------------          -----      ----       ----
                                                                           (POUND)M    (POUND)M
<S>                                                               <C>       <C>        <C>  
Profit attributable to members of Siebe plc...................     23        253.8      193.0
Currency translation differences (on foreign currency net          
investments)..................................................     23       (158.2)      21.9
                                                                            ------       ----
TOTAL RECOGNIZED GAINS AND LOSSES FOR THE YEAR................                95.6      214.9
                                                                            ======       ====
</TABLE>


     AUDITED RECONCILIATION OF MOVEMENTS IN CONSOLIDATED SHAREHOLDERS' FUNDS


<TABLE>
<CAPTION>
FOR THE FISCAL YEARS ENDED 5 APRIL 1997 AND 6 APRIL 1996                     1997       1996
- --------------------------------------------------------                     ----       ----
                                                                           (POUND)M    (POUND)M
<S>                                                                         <C>       <C>  
Profit attributable to members of Siebe plc...................               253.8      193.0
Dividends.....................................................               (73.4)     (57.2)
Currency translation differences (on foreign currency net                   (158.2)      21.9
investments)..................................................
Share capital issued, including scrip dividends...............               383.3        3.9
Transfer to goodwill .........................................                 3.9        --
Goodwill on acquisitions in the period........................              (455.1)     (65.5)
                                                                           -------    -------
                                                                             (45.7)      96.1
Opening shareholders' funds...................................             1,062.3      966.2
                                                                           -------    -------
CLOSING SHAREHOLDERS' FUNDS...................................             1,016.6    1,062.3
                                                                           =======    =======
</TABLE>




                                      F-6
<PAGE>   7
                          AUDITED COMPANY BALANCE SHEET


<TABLE>
<CAPTION>
AT 5 APRIL 1997 AND 6 APRIL 1996                                  NOTES      1997       1996
- --------------------------------                                  -----      ----       ----
                                                                           (POUND)M    (POUND)M
<S>                                                               <C>       <C>        <C>
FIXED ASSETS
Tangible assets...............................................     13          2.7        2.4
Investments...................................................     14        624.8      183.5
                                                                           -------    -------
                                                                             627.5      185.9
                                                                           -------    -------
CURRENT  ASSETS
Debtors:
  Amounts falling due within one year.........................     16        333.9      422.6
  Amounts falling due after more than one year................     16      1,074.9      626.1
                                                                           -------    -------
                                                                           1,408.8    1,048.7
Cash and deposits.............................................                 3.9       15.5
                                                                           -------    -------
                                                                           1,412.7    1,064.2
Creditors:
  Amounts falling due within one year:
    Short-term borrowings.....................................     17        (96.5)     (38.5)
    Other creditors...........................................     17       (146.8)    (122.7)
                                                                           -------    -------
                                                                            (243.3)    (161.2)
NET CURRENT ASSETS............................................             1,169.4      903.0
                                                                           -------    -------
TOTAL ASSETS LESS CURRENT LIABILITIES.........................             1,796.9    1,088.9

Creditors:
  Amounts falling due after more than one year:
    Loans and other borrowings................................     18       (565.2)    (251.5)
    Other creditors...........................................               (24.0)     (20.1)
                                                                           -------    -------
                                                                            (589.2)    (271.6)
Provisions for liabilities and charges........................     21         (6.5)      (7.6)
                                                                           -------    -------
                                                                           1,201.2      809.7
                                                                           -------    -------
CAPITAL AND RESERVES
Called up share capital.......................................     22        118.4      107.2
Share premium account.........................................     23        389.2      385.2
Other reserves................................................     23        578.6      217.3
Revenue reserve...............................................     23        115.0      100.0
                                                                           -------    -------
SHAREHOLDERS' FUNDS -- EQUITY.................................             1,201.2      809.7
                                                                           =======    =======
</TABLE>




                                      F-7
<PAGE>   8
                               ACCOUNTING POLICIES

    The following paragraphs describe the main accounting policies of the Group.

CHANGES IN ACCOUNTING PRESENTATION

    Changes in the presentation of the Group cash flow statement have been made
consequent upon the adoption of the revised Financial Reporting Standard No 1
"Cash Flow Statements". Comparative figures have been restated in accordance
with the revised presentation.

BASIS OF CONSOLIDATION

    These accounts have been prepared under the historical cost convention and
in accordance with applicable accounting standards and incorporate the accounts
of Siebe plc and its subsidiaries. The results of subsidiaries sold or acquired
are included in the profit and loss account up to, or from, the date control
passes.

TURNOVER

    Turnover represents sales by Group companies to third parties, including
sales to associated undertakings, but excluding value added tax.

DEPRECIATION

    Depreciation of the Group's tangible and intangible fixed assets is provided
at the following annual percentages on their cost or net book value at the
beginning of the year or the cost of fixed assets purchased during the year less
the estimated residual value:

<TABLE>
<S>                                                            <C>
      Freehold land...........................................     Nil
      Freehold buildings......................................  2 -2.5%
      Plant and machinery.....................................  6 - 20%
      Motor vehicles .........................................      25%
      Patents and other intangibles...........................  6 - 33%
      Computer software....................................... 10 - 25%
</TABLE>

    Depreciation of the Group's leasehold properties is provided so as to
amortize them over their remaining useful lives.

DEFERRED TAXATION

    Deferred taxation is provided using the liability method in respect of the
taxation effect of all timing differences to the extent that it is probable that
liabilities will crystallize in the foreseeable future. Deferred taxation on
pension balances and provisions for post-retirement obligations is recognized in
full.

FOREIGN CURRENCY TRANSLATION

    Foreign currency assets and liabilities are translated into sterling at
rates of exchange ruling at the balance sheet date. The trading results of
overseas subsidiary and associated undertakings have been translated into
sterling at average rates of exchange ruling during the year.

    The differences on exchange attributable to the translation of the opening
net assets of overseas undertakings and their retained profits for the year, net
of the related foreign currency loans, have been adjusted through the exchange
variation reserve. Other exchange differences are taken to the profit and loss
account.

STOCKS

    Stocks are valued at the lower of cost and estimated net realizable value.
Cost includes raw materials and labor costs with an appropriate amount of
factory overheads.




                                      F-8
<PAGE>   9
                         ACCOUNTING POLICES (CONTINUED)



RESEARCH AND DEVELOPMENT EXPENDITURE

    Expenditure on research and development is written off when incurred except
for development prototype expenditure and associated software costs on defined
commercial projects which are included within intangible assets. These are
amortized over a period of between three to ten years commencing with the
commercial production or application of the product.

INVESTMENTS IN SUBSIDIARY UNDERTAKINGS

    Investments in subsidiary undertakings are held at cost less provisions.

GOODWILL

    Goodwill arising on consolidation representing the excess of the fair value
of the purchase consideration over the fair value of the net assets acquired, is
written off against reserves in the year of acquisition.

    Goodwill previously eliminated against reserves is written back in so far as
it relates to disposals in the year.

LEASES

    Assets held under finance leases have been capitalized together with their
related lease obligations and are disclosed within tangible fixed assets and
borrowings, respectively.

    Depreciation is provided at rates designed to write off the cost less
estimated residual value in equal annual amounts over the shorter of the
estimated useful lives of the assets or the period of the leases.

    Expenditure on operating leases is charged to the profit and loss account
evenly over the life of the leases.

POST-EMPLOYMENT BENEFITS

    The Group operates pension schemes covering the majority of employees. The
schemes are funded by contributions partly from the employees and partly from
the companies at rates determined by independent actuaries. These contributions
are invested separately from the Group's assets. Pension costs have been
calculated in accordance with SSAP24 for United Kingdom schemes. As it is
impractical to comply with SSAP24 for non-United Kingdom schemes, costs have
been calculated in accordance with FAS87 for United States schemes and local
best practice for all other overseas schemes.

    Post-retirement and post-employment benefits other than pensions have been
reflected through the profit and loss account in accordance with UITF6.




                                      F-9
<PAGE>   10

                              NOTES TO THE ACCOUNTS

1  BASIS OF PREPARATION

    The profit and loss account covers the 52 weeks from 7 April 1996 to 5 April
1997 and the balance sheets for 1996 and 1997 have been drawn up at 6 April 1996
and 5 April 1997 (or to 31 March where applicable).

2 ANALYSIS OF CONSOLIDATED TURNOVER, PROFIT BEFORE INTEREST AND TAX, AND
OPERATING NET ASSETS

                                                      
<TABLE>
<CAPTION>
                                                         PROFIT       PROFIT
                                                         BEFORE       BEFORE                           
                                                        INTEREST     INTEREST  OPERATING      OPERATING   
                                  TURNOVER   TURNOVER    AND TAX      AND TAX  NET ASSETS     NET ASSETS   
                                    1997       1996       1997         1996       1997          1996
                                    ----       ----     -------      -------   ----------    ----------
                                  (POUND)M  (POUND)M    (POUND)M     (POUND)M    (POUND)M     (POUND)M
<S>                                <C>      <C>         <C>          <C>       <C>           <C>  
PRODUCT CATEGORY:                                                                           
Control systems..................  1,072.8     987.8    182.3          155.7        879.4        934.2
Temperature and appliance                                                                   
controls.........................  1,392.6   1,060.1    226.6          154.7      1,138.8        889.3
Industrial equipment.............    539.9     551.2     61.0           60.8        221.1        214.2
                                   -------   -------    -----          -----      -------      -------
                                   3,005.3   2,599.1    469.9          371.2      2,239.3      2,037.7
                                   -------   -------    -----          -----      -------      -------
Profit on sale of fixed assets...                         5.2            3.8         --           --
Profit on sale of businesses.....                         7.0            4.4         --           --
                                                        -----          -----      -------      -------
                                                        482.1          379.4      2,239.3      2,037.7
                                                        -----          -----      -------      -------
GEOGRAPHICAL ANALYSIS BY                                                                    
LOCATION:                                                                                   
United Kingdom...................    329.4     252.5     77.0           54.8        147.3        104.3
Rest of Europe...................    815.6     747.6     92.7           90.4        468.7        515.7
North America....................  1,335.3   1,250.5    207.4          159.2      1,235.9      1,169.3
South America....................     78.5      72.8     16.9           16.6         53.9         46.9
Pacific..........................    391.6     247.7     70.4           47.1        315.7        190.8
Africa and the Middle East.......     54.9      28.0      5.5            3.1         17.8         10.7
                                   -------   -------    -----          -----      -------      -------
                                   3,005.3   2,599.1    469.9          371.2      2,239.3      2,037.7
                                   -------   -------    -----          -----      -------      -------
Profit on sale of fixed assets...                         5.2            3.8         --           --
Profit on sale of businesses.....                         7.0            4.4         --           --
                                                        -----          -----      -------      -------
                                                        482.1          379.4      2,239.3      2,037.7
                                                        -----          -----
Borrowings.......................                                                  (775.2)      (714.6)
Cash and deposits................                                                   210.8        282.3
Provisions for liabilities and
charges..........................                                                  (294.6)      (293.2)
Taxation.........................                                                  (162.8)      (113.6)
Dividends........................                                                   (69.5)       (57.2)
                                                                                  -------      -------
Net assets per consolidated                                                       
balance sheet....................                                                 1,148.0      1,141.4
                                                                                  =======      =======
                                                                                  
                                                                                            
                                                                                            
GEOGRAPHICAL ANALYSIS OF SALES BY                                                           
DESTINATION:                                                                                
United Kingdom...................    237.7     179.7                                        
Rest of Europe...................    831.5     784.6                                        
North America....................  1,257.2   1,167.9                                      
South America....................    101.9      83.2               
Pacific..........................    460.4     304.2               
Africa and the Middle East.......    116.6      79.5                
                                   -------   -------               
                                   3,005.3   2,599.1               
                                   =======   =======
</TABLE>



                                      F-10
<PAGE>   11
                       NOTES TO THE ACCOUNTS (CONTINUED)


3  NET OPERATING CHARGES

<TABLE>
<CAPTION>
                                                      CONTINUING                  1997        1996
                                                      OPERATIONS  ACQUISITIONS   TOTAL       TOTAL
                                                      ----------  ------------   -----       -----
                                                        (POUND)M    (POUND)M    (POUND)M    (POUND)M
<S>                                                   <C>         <C>          <C>          <C>
Change in stocks of finished goods and work in        
progress.........................................        20.4        10.6         31.0         6.7
Own work capitalized.............................       (58.4)       (9.3)       (67.7)      (55.0)
Other operating income...........................       (10.8)       (6.2)       (17.0)      (15.7)
Raw materials and consumables....................       851.8       153.2      1,005.0       892.2
Other external charges...........................       341.6        39.6        381.2       318.9
Staff costs (See note 4).........................       843.7       115.3        959.0       868.3
Depreciation.....................................       130.8        15.8        146.6       121.4
Other operating charges..........................        51.1        46.5         97.6        91.6
Share of profits of associated undertakings (See      
note 5)..........................................        (0.3)       --           (0.3)       (0.5)
                                                      -------       -----      -------     -------
Net operating charges............................     2,169.9       365.5      2,535.4     2,227.9
                                                      =======       =====      =======     =======
</TABLE>

4  STAFF NUMBERS AND COSTS

    The average number of persons employed by the Group (including directors)
during the year was as follows:

<TABLE>
<CAPTION>
                                                                            1997        1996
                                                                            ----       ----
<S>                                                                        <C>       <C>
Management....................................................                976       834
Administration................................................              3,897     3,047
Production and sales staff....................................             37,230    31,944
                                                                           ------    ------
                                                                           42,103    35,825
                                                                           ------    ------
</TABLE>

    The aggregate payroll costs of these persons were as follows:

<TABLE>
<CAPTION>
                                                                              1997       1996
                                                                              ----       ----
                                                                            (POUND)M    (POUND)M
<S>                                                                         <C>          <C>
Wages and salaries............................................                777.8      692.2
Social security costs.........................................                102.9       94.3
Other pension costs...........................................                 78.3       81.8
                                                                              -----      -----
                                                                              959.0      868.3
                                                                              -----      -----
</TABLE>


5  SHARE OF PROFITS OF ASSOCIATED UNDERTAKINGS

<TABLE>
<CAPTION>
                                                                              1997       1996
                                                                              ----       ----
                                                                            (POUND)M    (POUND)M
<S>                                                                           <C>        <C>
Attributable to the Group's interest:
Profit before taxation........................................                0.3        0.5
Taxation......................................................               (0.1)      (0.1)
                                                                             ----       ---- 
Profit after taxation, transferred to reserves (see note 14)..                0.2        0.4
                                                                             ----       ---- 
</TABLE>

    The principal associated undertakings are as follows:

<TABLE>
<CAPTION>
                                                                                      PERCENTAGE
                                                                                       OF EQUITY
                                                                                        CAPITAL
                                                                                      ATTRIBUTABLE
                                                                          COUNTRY OF    TO THE
                                                                         INCORPORATION COMPANY'S
                                                                         REGISTRATION  INTEREST VIA
                                                                              AND      SUBSIDIARY
                                                      NATURE OF BUSINESS   OPERATION   UNDERTAKINGS
                                                      ------------------   ---------   ------------
<S>                                 <C>               <C>                <C>           <C>
PT Foxboro Perkind Indonesia......                    Control systems     Indonesia       40
Foxboro (Malaysia) Sendirian Berhad                   Control systems      Malaysia       40
Foxboro (Thailand) Co Ltd.........                    Control systems      Thailand       40
Eberle Pte. Limited............... Temperature and appliance controls     Singapore       30
Jonan Denshi K.K.................. Temperature and appliance controls         Japan       45
Holman Brothers (Nigeria) Ltd.....                     Compressed air       Nigeria       40
GE Fanuc Eberle Automation GmbH...                    Control systems       Germany       50
</TABLE>





                                      F-11
<PAGE>   12
                       NOTES TO THE ACCOUNTS (CONTINUED)


6  PROFIT ON ORDINARY ACTIVITIES BEFORE TAXATION

    Profit on ordinary activities before taxation is stated after charging the
following:

<TABLE>
<CAPTION>
                                                                                1997        1996
                                                                              --------     --------
                                                                              (POUND)M     (POUND)M
<S>                                                                             <C>          <C> 
Operating lease rentals:
    Hire of plant and machinery.............................................    33.6         34.3
    Other...................................................................    35.6         32.1
Reorganization costs........................................................    17.8         18.6
Research and development:
    Pure and applied (less recoveries)......................................    67.1         45.2
    Other costs.............................................................    73.8         69.7
Auditors' remuneration:
    Audit fees..............................................................     3.6          3.1
Interest payable on:
                                                                             --------     --------
    Bank loans and overdrafts...............................................    58.1         50.0
    Other loans.............................................................     3.5          3.4
Finance leases:
    Plant and machinery.....................................................     2.2          1.6
    Other...................................................................     1.3          2.1
                                                                             --------     --------
                                                                                65.1         57.1
</TABLE>

    Fees paid to the auditors of the parent company for services other than the
statutory audit supplied to the Company and its United Kingdom subsidiary
undertakings during the year ended 5 April 1997 amounted to (pound)0.8 million
(1996 (pound)0.6 million). Fees paid to the auditors of overseas subsidiary
undertakings for services other than the statutory audit during the year ended 5
April 1997 amounted to (pound)1.5 million (1996 (pound)1.4 million).

7  EMOLUMENTS OF DIRECTORS AND EMPLOYEES

    Aggregate emoluments of the directors of the Company were as follows:

<TABLE>
<CAPTION>
                                                                           1997       1996
                                                                         ---------  ---------
                                                                         (POUND)M   (POUND)M
<S>                                                                      <C>        <C>    
Fees...................................................................    307,500    302,625
Salary.................................................................  1,539,605  1,058,191
Benefits...............................................................    104,812     84,433
Performance related pay................................................    564,728    467,022
Pension contributions..................................................    221,944    123,741
                                                                         ---------  ---------
                                                                         2,738,589  2,036,012
                                                                         ---------  ---------
</TABLE>


    The number of directors and of those Group employees whose emoluments,
excluding pension contributions, exceed (pound)30,000 are set out in bands in
the following table.



                                      F-12
<PAGE>   13
                       NOTES TO THE ACCOUNTS (CONTINUED)


7  EMOLUMENTS OF DIRECTORS AND EMPLOYEES (CONTINUED)

<TABLE>
<CAPTION>
                                                                     EMPLOYEES       EMPLOYEES
                                                      DIRECTORS        COMPANY          GROUP
EMOLUMENTS                                          -----------     -----------     -----------
(POUND)                                             1997   1996     1997   1996     1997   1996
- -------                                             ----   ----     ----   ----     ----   ----
<S>                                                 <C>    <C>      <C>    <C>    <C>    <C>
10,001-15,000..................................      --     1
15,001-20,000..................................       2     1
20,001-25,000..................................       2     2
25,001-30,000..................................       1     1
30,001-35,000..................................      --    --        4       5    1,870  1,455
35,001-40,000..................................      --    --        6       9    1,112    923
40,001-45,000..................................      --    --        5       5      696    682
45,001-50,000..................................      --    --        2       3      483    415
50,001-55,000..................................      --    --        2      --      331    293
55,001-60,000..................................      --    --        1       1      192    178
60,001-65,000..................................      --    --        3       1      116    112
65,001-70,000..................................      --    --       --      --       96     94
70,001-75,000..................................      --    --        1      --       78     55
75,001-80,000..................................      --    --       --       2       57     46
80,001-85,000..................................      --    --        3       1       32     27
85,001-90,000..................................      --    --        2       1       33     21
90,001-95,000..................................      --    --       --      --       25     11
95,001-100,000.................................      --    --        1       1       15     19
100,001-105,000................................      --    --       --      --        9     12
105,001-110,000................................      --    --       --      --       20     17
110,001-115,000................................      --    --       --       1        7      8
115,001-120,000................................      --    --       --      --        6      6
120,001-125,000................................      --    --       --      --       10      4
125,001-130,000................................      --    --        1      --        7      7
130,001-135,000................................      --    --       --      --        9      2
135,001-140,000................................      --    --       --      --        1      5
140,001-145,000................................      --    --        1       1        3      2
145,001-150,000................................      --    --       --      --        3      1
150,001-155,000................................      --    --       --       1        1      3
155,001-160,000................................      --    --        1       2        2      3
160,001-165,000................................      --    --        1      --        3      2
165,001-170,000................................       1     1        2       1        3      3
175,001-180,000................................      --    --       --      --       --      5
180,001-185,000................................      --    --       --      --       --      1
185,001-190,000................................      --    --       --      --        2      1
190,001-195,000................................       1    --       --      --       --      2
195,001-200,000................................      --    --        1      --       --     --
200,001-205,000................................      --    --       --      --       --      1
205,001-210,000................................      --    --       --      --        1      1
210,001-215,000................................      --    --       --      --       --      2
220,001-225,000................................       1     1       --      --       --     --
230,001-235,000................................      --    --       --      --        1     --
245,001-250,000................................      --    --       --      --       --      1
300,001-305,000................................      --    --       --      --       --      1
320,001-325,000................................      --    --       --      --        1     --
345,001-350,000................................       1    --       --      --       --     --
355,001-360,000................................      --     1       --      --       --     --
365,001-370,000................................       1    --       --      --       --     --
435,001-440,000................................      --     1       --      --       --     --
465,001-470,000................................       1    --       --      --       --     --
625,001-630,000................................      --     1       --      --       --     --
640,001-645,000................................       1    --       --      --       --     --
</TABLE>

    The number of directors shown above includes directors who held office for
only part of each year.



                                      F-13
<PAGE>   14
                       NOTES TO THE ACCOUNTS (CONTINUED)



8  TAX ON PROFIT ON ORDINARY ACTIVITIES

    The charge for taxation is as follows:

<TABLE>
<CAPTION>
                                                                                  1997        1996
                                                                                --------    --------
                                                                                (POUND)M    (POUND)M
<S>                                                                              <C>         <C> 
United Kingdom Corporation tax on income at 33% (1996 33%)....................     48.1       62.1
Less relief for overseas tax..................................................    (13.6)     (20.4)
                                                                                  -----      -----
                                                                                   34.5       41.7
Deferred tax..................................................................     10.1       12.0
Overseas tax..................................................................    114.6       67.9
Prior year....................................................................     (2.3)       5.2
                                                                                  -----      -----
                                                                                  156.9      126.8
                                                                                  -----      -----
</TABLE>

9  PROFIT ATTRIBUTABLE TO THE HOLDING COMPANY

    The profit dealt with in the accounts of the holding company, Siebe plc, is
(pound)80.0 million (1996 (pound)79.3 million).

    In accordance with the exemption granted under the Companies Act 1985, a
separate profit and loss account for the Company has not been presented.

10  DIVIDENDS

<TABLE>
<CAPTION>
                                                                                   1997         1996
                                                                                 --------     --------
                                                                                 (POUND)M     (POUND)M
<S>                                                                              <C>           <C> 
Final 1995/96 of 8.87p per share, equivalent with tax credit to 11.0875p                        
  per share on shares issued to acquire Unitech plc .....................           3.9          --
Interim of 4.90p (1996 4.44p) per share, equivalent with tax credit to                          
  6.125p (1996 5.55p) per share..........................................          23.1         19.1
Final of 9.80p (1996 8.87p) per share, equivalent with tax credit to                            
  12.25p (1996 11.0875p) per share.......................................          46.4         38.1
                                                                                   ----         ----
                                                                                   73.4         57.2
                                                                                   ----         ----
</TABLE>
         
11  EARNINGS PER SHARE

    The earnings per share on a net basis have been calculated using 469.5
million shares (1996 428.8 million), being the weighted average number of shares
in issue during the year and the profit after taxation and minority interests of
(pound)253.8 million (1996 (pound)193.0 million).

    Figures for fully diluted earnings per share based on outstanding share
options are not provided as the effect on the earnings per share is not
material.




                                      F-14
<PAGE>   15
                       NOTES TO THE ACCOUNTS (CONTINUED)




12  INTANGIBLE FIXED ASSETS


<TABLE>
<CAPTION>
                                                 DEVELOPMENT
                                                    COSTS      PATENTS,
                                                  INCLUDING    LICENSES    
                                                  COMPUTER       AND        PAYMENTS           
                                                  SOFTWARE    TRADEMARKS   ON ACCOUNT  TOTAL
                                                  --------    ----------   ----------  -----
                                                   (POUND)M    (POUND)M    (POUND)M   (POUND)M
<S>                                               <C>          <C>         <C>        <C>  
GROUP COST
At 1 April 1995 ..........................           175.2       336.9        2.2      514.3
New subsidiary undertakings ..............             0.2         8.7       --          8.9
Additions ................................            30.1         3.4        0.5       34.0
Exchange adjustments .....................             7.9        20.3       (0.1)      28.1
                                                     -----       -----      -----      -----
                                                     213.4       369.3        2.6      585.3
Disposals ................................            (3.8)       (0.7)      --         (4.5)
                                                     -----       -----      -----      -----
At 6 April 1996 ..........................           209.6       368.6        2.6      580.8

New subsidiary undertakings ..............            15.1       107.8       --        122.9
Additions ................................            42.9         6.8       --         49.7
Exchange adjustments .....................           (20.9)      (42.6)      (0.4)     (63.9)
                                                     -----       -----      -----      -----
                                                     246.7       440.6        2.2      689.5
Disposals ................................            (1.5)       (3.1)      (2.2)      (6.8)
                                                     -----       -----      -----      -----
At 5 April 1997...........................           245.2       437.5       --        682.7
                                                     -----       -----      -----      -----


DEPRECIATION
At 1 April 1995...........................            69.8        97.8        0.4      168.0
Charge for the year ......................            24.7        19.5        0.5       44.7
Disposals.................................            (1.7)       (0.3)      --         (2.0)
Exchange adjustments .....................             4.0         6.5       (0.1)      10.4
                                                     -----       -----      -----      -----

At 6 April 1996...........................            96.8       123.5        0.8      221.1

Charge for the year ......................            24.1        27.1       --         51.2
Disposals.................................            (0.9)       (0.7)      (0.6)      (2.2)
Exchange adjustments .....................            (8.6)       (8.2)      (0.2)     (17.0)
                                                     -----       -----      -----      -----

At 5 April 1997...........................           111.4       141.7       --        253.1
                                                     -----       -----      -----      -----
NET BOOK VALUE
At 5 April 1997...........................           133.8       295.8       --        429.6
                                                     -----       -----      -----      -----
At 6 April 1996...........................           112.8       245.1        1.8      359.7
                                                     -----       -----      -----      -----
At 2 April 1995...........................           105.4       239.1        1.8      346.3
                                                     -----       -----      -----      -----
</TABLE>


    Development costs consist principally of prototype costs, net book value of
(pound)95.1 million (1996 (pound)82.5 million and 1995 (pound)75.3 million) and
computer software.



                                      F-15
<PAGE>   16
                       NOTES TO THE ACCOUNTS (CONTINUED)



13  TANGIBLE FIXED ASSETS


<TABLE>
<CAPTION>
                                                        LONG       SHORT
                                          FREEHOLD    LEASEHOLD   LEASEHOLD  PLANT &
                                          PROPERTY   PROPERTY    PROPERTY  EQUIPMENT   TOTAL
                                          --------   --------    --------  ---------   -----
                                          (POUND)M   (POUND)M    (POUND)M  (POUND)M   (POUND)M
<S>                                       <C>        <C>         <C>       <C>         <C>    
GROUP COST
At 2 April 1995........................     248.8       12.8       17.4      938.2    1,217.2
New subsidiary undertakings............      10.3       --         --         23.1       33.4
Additions..............................       6.5       --          1.2      147.4      155.1
Change in category.....................       2.2       --         (0.8)      (1.4)      --
Exchange adjustments ..................       4.1       --          0.6       32.9       37.6
                                            -----       ----       ----    -------    -------
                                            271.9       12.8       18.4    1,140.2    1,443.3
Disposal of subsidiary undertakings....      (0.1)      --         --        (15.3)     (15.4)
Disposals..............................     (22.8)      (0.1)      (2.0)     (21.1)     (46.0)
                                            -----       ----       ----    -------    -------
At 6 April 1996........................     249.0       12.7       16.4    1,103.8    1,381.9

New subsidiary undertakings............      57.0        1.3        6.4      105.1      169.8
Additions..............................      13.4       --          3.5      186.1      203.0
Change in category.....................       3.2       --          1.8       (5.0)      --
Exchange adjustments ..................     (37.7)      (0.1)      (2.1)    (113.8)    (153.7)
                                            -----       ----       ----    -------    -------
                                            284.9       13.9       26.0    1,276.2    1,601.0
Disposal of subsidiary undertakings....      --         --         (0.1)      (1.2)      (1.3)
Disposals..............................     (21.5)      (5.5)      (0.2)     (29.2)     (56.4)
                                            -----       ----       ----    -------    -------
At 5 April 1997........................     263.4        8.4       25.7    1,245.8    1,543.3
                                            -----       ----       ----    -------    -------

DEPRECIATION
At 2 April 1995........................      23.9        0.7        5.3      330.8      360.7
Charge for the year....................       2.4       --          1.1       73.2       76.7
Change in category.....................       0.4       --         (0.2)      (0.2)      --
Exchange adjustments...................       0.8       --          0.2       11.9       12.9
                                            -----       ----       ----    -------    -------
                                             27.5        0.7        6.4      415.7      450.3
Disposal of subsidiary undertakings....      --         --         --         (7.8)      (7.8)
Disposals..............................      (3.1)      --         (0.8)     (10.8)     (14.7)
                                            -----       ----       ----    -------    -------

At 6 April 1996........................      24.4        0.7        5.6      397.1      427.8

Charge for the year....................       5.0       --          1.8       88.6       95.4
Change in category.....................      (0.6)      --          0.6       --         --
Exchange adjustments...................      (3.2)      --         (0.5)     (38.3)     (42.0)
                                            -----       ----       ----    -------    -------
                                             25.6        0.7        7.5      447.4      481.2
Disposal of subsidiary undertakings....      --         --         --         (0.1)      (0.1)
Disposals..............................      (2.7)      (0.6)      (0.1)     (18.0)     (21.4)
                                            -----       ----       ----    -------    -------

At 5 April 1997........................      22.9        0.1        7.4      429.3      459.7
                                            -----       ----       ----    -------    -------

NET BOOK VALUE
At 5 April 1997........................     240.5        8.3       18.3      816.5    1,083.6
                                            -----       ----       ----    -------    -------
At 6 April 1996........................     224.6       12.0       10.8      706.7      954.1
                                            -----       ----       ----    -------    -------
At 2 April 1995........................     224.9       12.1       12.1      607.4      856.5
                                            -----       ----       ----    -------    -------
</TABLE>

    Within cost of freehold property (pound)176.3 million (1996 (pound)166.4
million and 1995 (pound)159.9 million) relates to depreciable assets.



                                      F-16
<PAGE>   17
                       NOTES TO THE ACCOUNTS (CONTINUED)


13  TANGIBLE FIXED ASSETS (CONTINUED)

Amounts included in respect of assets held under finance leases are:


<TABLE>
<CAPTION>
                                                                   LAND &         PLANT &
                                                                 BUILDINGS      EQUIPMENT       TOTAL
                                                                 ---------      ---------       -----
                                                                  (POUND)M       (POUND)M      (POUND)M
<S>                                                              <C>            <C>             <C> 
NET BOOK VALUE
At 5 April 1997..............................................       3.0           30.1           33.1
                                                                   ----           ----           ----
At 6 April 1996..............................................       5.4           32.5           37.9
                                                                   ----           ----           ----
At 2 April 1995..............................................      10.8           36.5           47.3
                                                                   ----           ----           ----
                                                                                               
DEPRECIATION                                                                                   
Charge for the year ended 5 April 1997.......................       0.1            5.8            5.9
                                                                   ----           ----           ----
Charge for the year ended 6 April 1996.......................       0.3            7.4            7.7
                                                                   ----           ----           ----
</TABLE>

    During the period the Group entered into finance lease arrangements in
respect of assets with a total capital value at the inception of the leases of
(pound)5.1 million (1996 (pound)6.1 million and 1995 (pound)11.6 million).

<TABLE>
<CAPTION>
                                                                     SHORT
                                                      FREEHOLD     LEASEHOLD    PLANT &
                                                      PROPERTY     PROPERTY    EQUIPMENT    TOTAL
                                                      --------     ---------   ---------    -----
                                                      (POUND)M     (POUND)M    (POUND)M    (POUND)M
<S>                                                   <C>          <C>         <C>         <C>
COMPANY COST                                                              
At 2 April 1995...................................       2.3           0.2        0.9        3.4
Additions.........................................      --            --          1.1        1.1
                                                       -----          ----       ----       ----
                                                         2.3           0.2        2.0        4.5
Disposals.........................................      (1.2)         --         --         (1.2)
                                                       -----          ----       ----       ----
At 6 April 1996...................................       1.1           0.2        2.0        3.3
                                                                  
Additions.........................................       0.7           6.1        0.6        7.4
                                                       -----          ----       ----       ----
                                                         1.8           6.3        2.6       10.7
Disposals.........................................      (0.7)         (6.1)      (0.2)      (7.0)
                                                       -----          ----       ----       ----
At 5 April 1997...................................       1.1           0.2        2.4        3.7
                                                       -----          ----       ----       ----
                                                                  
DEPRECIATION                                                      
At 2 April 1995...................................       0.7          --          0.4        1.1
Charge for the year...............................      --            --          0.2        0.2
                                                                  
Disposals.........................................      (0.3)         --         (0.1)      (0.4)
                                                       -----          ----       ----       ----
At 6 April 1996...................................       0.4          --          0.5        0.9
Charge for the year...............................      --            --          0.1        0.1
                                                       -----          ----       ----       ----
                                                                  
At 5 April 1997...................................       0.4          --          0.6        1.0
                                                       -----          ----       ----       ----
NET BOOK VALUE                                                    
At 5 April 1997...................................       0.7           0.2        1.8        2.7
                                                       -----          ----       ----       ----
At 6 April 1996...................................       0.7           0.2        1.5        2.4
                                                       -----          ----       ----       ----
At 2 April 1995...................................       1.6           0.2        0.5        2.3
                                                       -----          ----       ----       ----
</TABLE>
                                                               

    Within cost of freehold property (pound)1.0 million (1996 (pound)1.0 million
and 1995 (pound)2.3 million) relates to depreciable assets.




                                      F-17
<PAGE>   18
                       NOTES TO THE ACCOUNTS (CONTINUED)



13  TANGIBLE FIXED ASSETS (CONTINUED)

Amounts included in respect of assets held under finance
leases are:

<TABLE>
<CAPTION>
                                                                  LAND &     PLANT &
                                                                 BUILDINGS  EQUIPMENT    TOTAL
                                                                 ---------  ---------    -----
                                                                 (POUND)M   (POUND)M   (POUND)M
<S>                                                              <C>        <C>        <C>
NET BOOK VALUE
At 5 April 1997..............................................       --         0.3        0.3
                                                                    ----       ---        ---
At 6 April 1996..............................................       --         0.4        0.4
                                                                    ----       ---        ---
At 2 April 1995..............................................        1.0       0.4        1.4
                                                                    ----       ---        ---
DEPRECIATION
Charge for the year ended 5 April 1997.......................       --         0.1        0.1
                                                                    ----       ---        ---
Charge for the year ended 6 April 1996.......................       --         0.1        0.1
                                                                    ----       ---        ---
</TABLE>




                                      F-18
<PAGE>   19
                       NOTES TO THE ACCOUNTS (CONTINUED)



14  FIXED ASSET INVESTMENTS

<TABLE>
<CAPTION>
                                                              GROUP                    COMPANY
                                                        -----------------        ---------------------
                                                         1997       1996           1997         1996
                                                         ----       ----           ----         ----
                                                       (POUND)M   (POUND)M       (POUND)M     (POUND)M
<S>                                                     <C>        <C>             <C>         <C>
Associated undertakings..........................         2.2        2.7            --          --
Trade investments................................        17.0      107.2             0.2       103.1
Subsidiary undertakings..........................        --         --             624.6        80.4
                                                         ----      -----           -----       -----
                                                         19.2      109.9           624.8       183.5
                                                         ----      -----           -----       -----
</TABLE>

<TABLE>
<CAPTION>
                                                                                  GROUP           
                                                                                 SHARE OF        
                                                                             POST-ACQUISITION
                                                                  SHARES         PROFITS/       
                                                                  AT COST        (LOSSES)      TOTAL
                                                                  -------        --------      -----
                                                                  (POUND)M       (POUND)M     (POUND)M
<S>                                                               <C>        <C>              <C>
ASSOCIATED UNDERTAKINGS                                                         
GROUP                                                                           
At 2 April 1995..............................................       3.3             0.1        3.4
Additions....................................................       1.1            --          1.1
Disposals....................................................      (1.0)           (1.3)      (2.3)
Share of profit for the year (See note 5)....................      --               0.4        0.4
Exchange adjustments.........................................      --               0.1        0.1
                                                                   ----           -----      -----
At 6 April 1996..............................................       3.4            (0.7)       2.7
New subsidiary undertakings..................................       0.1            --          0.1
Additions....................................................       0.1            --          0.1
Disposals....................................................      (0.3)           (0.5)      (0.8)
Share of profit for the year (See note 5)....................      --               0.2        0.2
Exchange adjustments.........................................      (0.1)           --         (0.1)
                                                                   ----           -----      -----
At 5 April 1997..............................................       3.2            (1.0)       2.2
                                                                   ----           -----      -----
COMPANY
At 2 April 1995                                                     0.4            --          0.4
Disposals                                                          (0.4)           --         (0.4)
                                                                   ----           -----      -----
At 6 April 1996                                                    --              --         --
                                                                   ----           -----      -----
</TABLE>


           A list of associated undertakings is given in note 5.           



                                      F-19
<PAGE>   20
                       NOTES TO THE ACCOUNTS (CONTINUED)



14  FIXED ASSET INVESTMENTS (CONTINUED)



<TABLE>
<CAPTION>
                                                                 LISTED     UNLISTED
                                                                 AT COST     AT COST      TOTAL
                                                                 -------    --------      -----
                                                                (POUND)M    (POUND)M     (POUND)M
<S>                                                              <C>        <C>           <C>
TRADE INVESTMENTS
GROUP
At 2 April 1995..............................................       3.2        1.4        4.6
New subsidiary undertakings..................................      --          0.3        0.3
Additions....................................................     103.1        1.6      104.7
Disposals....................................................      --         (1.9)      (1.9)
Exchange adjustments.........................................      (0.4)      (0.1)      (0.5)
                                                                  -----       ----      -----
At 6 April 1996 .............................................     105.9        1.3      107.2

New subsidiary undertakings..................................       4.8        9.2       14.0
Additions....................................................       0.1        4.8        4.9
Transfer to subsidiary undertakings..........................    (103.1)      --       (103.1)
Disposals....................................................      (0.2)      (2.3)      (2.5)
Exchange adjustments.........................................      (1.5)      (2.0)      (3.5)
                                                                  -----       ----      -----
At 5 April 1997 .............................................       6.0       11.0       17.0
                                                                  -----       ----      -----
</TABLE>


    At 5 April 1997, the market value of listed investments (all of which are
listed on recognized stock exchanges) was (pound)5.2 million (1996 (pound)125.7
million and 1995 (pound)3.2 million).



<TABLE>
<CAPTION>
                                                                 LISTED   UNLISTED
                                                                 AT COST   AT COST      TOTAL
                                                                 -------  ---------     -----
                                                                (POUND)M   (POUND)M    (POUND)M
<S>                                                              <C>      <C>          <C>
COMPANY
Additions....................................................     103.1       --        103.1
At 6 April 1996..............................................     103.1       --        103.1
                                                                 ------       ----     ------
Additions....................................................      --          0.2        0.2
Transfer to investments in subsidiary undertakings...........    (103.1)      --       (103.1)
                                                                 ------       ----     ------
At 5 April 1997..............................................      --          0.2        0.2
                                                                 ------       ----     ------
</TABLE>


    At 6 April 1996, the market value of listed investments (which are listed on
a recognized stock exchange) was (pound)122.3 million.




                                      F-20
<PAGE>   21
                       NOTES TO THE ACCOUNTS (CONTINUED)



14  FIXED ASSET INVESTMENTS (CONTINUED)


<TABLE>
<CAPTION>
                                                                                      NET BOOK
                                                                  COST     PROVISION    VALUE
                                                                  ----     ---------    -----
                                                                (POUND)M   (POUND)M    (POUND)M
<S>                                                              <C>       <C>        <C>
INVESTMENT IN SUBSIDIARY UNDERTAKINGS
COMPANY
At 2 April 1995..............................................      81.8       (1.7)      80.1
Additions....................................................       0.3       --          0.3
                                                                  -----       ----      -----
At 6 April 1996..............................................      82.1       (1.7)      80.4
Additions....................................................     544.2       --        544.2
                                                                  -----       ----      -----
At 5 April 1997..............................................     626.3       (1.7)     624.6
                                                                  -----       ----      -----
</TABLE>


    Investment in subsidiary undertakings includes the Company's 50.6%
shareholding in Nemic-Lambda KK. Nemic-Lambda KK is quoted on the Tokyo Stock
Exchange - First Tier and on 5 April 1997 the imputed value of the Company's
50.6% shareholding was (pound)118.3 million, translated at Yen 203.62/(pound)1
(2 May 1996 (pound)314.1 million, translated at Yen 157.03/(pound)1). At 28 May
1997 the imputed value of the Group's 50.6% shareholding was (pound)197.1
million, translated at Yen 189.56/(pound)1.

15  STOCKS

<TABLE>
<CAPTION>
                                                                              1997       1996
                                                                            --------   --------
GROUP                                                                       (POUND)M   (POUND)M
<S>                                                                         <C>         <C>  
Raw materials...........................................................      156.6      130.6
Work in progress........................................................      130.1      143.0
Finished goods and goods for resale.....................................      207.1      208.4
Consumable stock........................................................        6.9        7.3
                                                                              -----      -----
                                                                              500.7      489.3
                                                                              -----      -----
</TABLE>



                                      F-21
<PAGE>   22
                       NOTES TO THE ACCOUNTS (CONTINUED)




16  DEBTORS

<TABLE>
<CAPTION>
                                                           GROUP                 COMPANY
                                                     -----------------     -------------------
                                                      1997       1996        1997      1996
                                                      ----       ----        ----      ----
                                                    (POUND)M   (POUND)M    (POUND)M   (POUND)M
<S>                                                 <C>        <C>         <C>        <C>
Amounts falling due within one year:
Trade debtors ...................................     553.9      485.1        --         --
Amounts owed by subsidiary undertakings..........      --         --         310.8      405.3
Amounts owed by associated undertakings..........       1.6        2.8        --         --
Other debtors....................................     172.5      123.5        19.9       15.2
Prepayments and accrued income...................     102.6       68.1         3.2        2.1
                                                      -----      -----     -------    -------
                                                      830.6      679.5       333.9      422.6
                                                      -----      -----     -------    -------
Amounts falling due after more than one year:
Amounts owed by subsidiary undertakings..........      --         --       1,074.7      625.8
Other debtors....................................      36.6       27.8         0.2        0.3
Deferred taxation................................      39.1       43.7        --         --
                                                      -----      -----     -------    -------
                                                       75.7       71.5     1,074.9      626.1
                                                      -----      -----     -------    -------
                                                      906.3      751.0     1,408.8    1,048.7
                                                      -----      -----     -------    -------
</TABLE>

    The deferred tax asset relates to provisions for post-employment benefit
schemes in the United States.


17  CREDITORS: AMOUNTS FALLING DUE WITHIN ONE YEAR

<TABLE>
<CAPTION>
                                                           GROUP                 COMPANY
                                                    -------------------    ------------------
                                                      1997        1996      1997       1996
                                                      ----        ----      ----       ----
                                                    (POUND)M    (POUND)M  (POUND)M   (POUND)M
<S>                                                   <C>        <C>       <C>        <C>
Bank and other loans
 --  secured.....................................       4.1        9.6      --         --
 --  unsecured...................................      42.6       43.4      34.4       --
Bank overdrafts
 --  secured.....................................      --          4.2      --         --
 --  unsecured...................................      23.4       18.5      61.8       38.2
Finance leases...................................       7.1        7.5       0.3        0.3
                                                      -----      -----     -----      -----

SHORT-TERM BORROWINGS............................      77.2       83.2      96.5       38.5
                                                      -----      -----     -----      -----

Payments received on account.....................      35.2       30.4      --         --
Trade creditors..................................     351.6      304.3      --         --
Bills of exchange ...............................      14.4       24.8      --         --
Amounts owed to subsidiary undertakings..........      --         --        40.2       30.4
Taxation:
Corporation and overseas tax.....................     162.8      113.6      19.8       27.5
Other tax........................................      18.4       18.3       0.1        0.1
                                                      -----      -----     -----      -----
                                                      181.2      131.9      19.9       27.6
Social security..................................      13.1       11.8      --         --
Other creditors..................................      69.3       45.8       3.6        1.9
Accruals.........................................     138.9      143.1      13.6        5.6
Proposed dividend ...............................      69.5       57.2      69.5       57.2
                                                      -----      -----     -----      -----
OTHER CREDITORS..................................     873.2      749.3     146.8      122.7
                                                      -----      -----     -----      -----
</TABLE>



                                      F-22
<PAGE>   23
                       NOTES TO THE ACCOUNTS (CONTINUED)


18  CREDITORS:  AMOUNTS FALLING DUE AFTER MORE THAN ONE YEAR


<TABLE>
<CAPTION>
                                                           GROUP                COMPANY
                                                     -----------------      -------------------
                                                      1997       1996         1997       1996
                                                      ----       ----         ----       ----
                                                    (POUND)M   (POUND)M     (POUND)M   (POUND)M
<S>                                                  <C>         <C>          <C>        <C>  
LOANS AND OTHER BORROWINGS
Finance leases.....................................   16.9        22.6          0.2        0.5
Bank and other loans (see note 19).................  681.1       608.8        565.0      251.0
                                                     -----       -----        -----      -----
                                                     698.0       631.4        565.2      251.5
                                                     -----       -----        -----      -----
</TABLE>

19 BANK AND OTHER LOANS FALLING DUE AFTER MORE THAN ONE YEAR

<TABLE>
<CAPTION>
                                                           GROUP                COMPANY
                                                   -------------------    -------------------
                                                    1997        1996        1997      1996
                                                    ----        ----        ----      ----
                                                  (POUND)M    (POUND)M    (POUND)M   (POUND)M
<S>                                                <C>        <C>         <C>        <C>  
UNSECURED
Wholly repayable within 5 years..................    518.6      594.6       412.5      251.0
Repayable in more than 5 years by installments...      1.7        0.4        --         --
Repayable in more than 5 years other than by         
installments....................................     152.4        0.7       152.5       --
                                                     -----      -----       -----      -----
                                                     672.7      595.7       565.0      251.0
                                                     -----      -----       -----      -----
SECURED
Wholly repayable within 5 years .................      2.1        4.0        --         --
Repayable in more than 5 years by installments ..      3.2        6.1        --         --
Repayable in more than 5 years other than by
installments.....................................      3.1        3.0        --         --
                                                     -----      -----       -----      -----
                                                       8.4       13.1        --         --
                                                     -----      -----       -----      -----
                                                     681.1      608.8       565.0      251.0
                                                     -----      -----       -----      -----
</TABLE>



     An analysis of the loans by due date of repayment is set out below:

<TABLE>
<CAPTION>
                                                            GROUP                COMPANY
                                                    --------------------   --------------------
                                                      1997        1996       1997        1996
                                                      ----        ----       ----        ----
                                                    (POUND)M    (POUND)M   (POUND)M    (POUND)M
<S>                                                    <C>         <C>      <C>        <C>
1-2 years .......................................      41.9        3.8        --         --
2-5 years........................................     480.8      598.3       412.5      251.0
In 5 or more years
 --  by installments.............................       2.9        3.0        --         --
 --  not by installments.........................     155.5        3.7       152.5       --
                                                      -----      -----       -----      -----
                                                      681.1      608.8       565.0      251.0
                                                      -----      -----       -----      -----
</TABLE>

    Of total unsecured bank and other loans of (pound)672.7 million,
(pound)152.5 million is repayable January 2007 and is at a fixed rate of
interest of 7.125% per annum, (pound)86.2 million is repayable by installments
commencing 1999 and ceasing January 2001 and is at a fixed rate of interest of
11.22% per annum and (pound)17.7 million is repayable December 1998 at a fixed
rate of interest of 9.12% per annum. Substantially all of the balance is
repayable by November 2000 and the interest rate related to LIBOR and varies
accordingly.

    Interest rate swaps totalling (pound)205.0 million have been entered into in
respect of borrowings denominated in Sterling, United States Dollars,
Deutschmarks, Yen and Canadian Dollars with maturity dates between January 1999
and April 2000.

    The secured bank and other loans totalling (pound)12.5 million are secured
against assets of certain overseas subsidiary undertakings.




                                      F-23
<PAGE>   24
                       NOTES TO THE ACCOUNTS (CONTINUED)



20  FINANCE LEASE COMMITMENTS

    At 5 April 1997 future minimum payments under finance leases and similar
hire purchase arrangements are as follows:


<TABLE>
<CAPTION>
                                                            GROUP                COMPANY
                                                     ------------------     ------------------
                                                       1997       1996       1997      1996
                                                     --------   --------   --------   -------
                                                     (POUND)M   (POUND)M   (POUND)M   (POUND)M
<S>                                                  <C>        <C>        <C>        <C>
Payable within 1 year............................      9.9       10.8        0.3        0.4
Payable between 1 and 2 years....................      8.6        8.9        0.2        0.3
Payable between 2 and 5 years....................     11.3       16.3        0.1        0.3
Payable after 5 years............................      3.2        8.3       --         --
                                                      ----      -----       ----       ----

Total gross payments.............................     33.0       44.3        0.6        1.0
Less finance charges included above..............     (9.0)     (14.2)      (0.1)      (0.2)
                                                      ----      -----       ----       ----
                                                      24.0       30.1        0.5        0.8
                                                      ----      -----       ----       ----
</TABLE>

21  PROVISIONS FOR LIABILITIES AND CHARGES

<TABLE>
<CAPTION>
                                                                   OTHER
                                                                  INCLUDING
                                       POST-RETIREMENT          REORGANIZATION  DEFERRED
                                         OBLIGATIONS   PENSIONS  AND WARRANTY     TAX       TOTAL
                                         -----------   --------  ------------     ---       -----
                                           (POUND)M    (POUND)M    (POUND)M     (POUND)M  (POUND)M
<S>                                    <C>             <C>      <C>             <C>        <C>  
GROUP                                                   
At 2 April 1995.......................     124.3         37.1       54.0         54.7      270.1
New subsidiary undertakings..........       --            1.9        3.5         (1.4)       4.0
Transfers.............................      --           --         --           (0.2)      (0.2)
Utilized in year -- net...............      (9.3)        (1.0)     (18.5)        --        (28.8)
Charged in year.......................       7.1          3.8        2.9         14.3       28.1
Advance corporation tax...............      --           --         --            9.9        9.9
Exchange adjustments..................       7.9          0.7        1.5         --         10.1
                                           -----         ----       ----         ----      -----
At 6 April 1996.......................     130.0         42.5       43.4         77.3      293.2
                                           -----         ----       ----         ----      -----
New subsidiary undertakings..........       --           15.5       22.5          7.5       45.5
Transfers.............................      --           --         --            2.0        2.0
Utilized in year -- net...............     (11.1)        (4.0)     (23.3)        --        (38.4)
Charged in year.......................       0.9          1.8       11.2          7.6       21.5
Advance corporation tax...............      --           --         --           (0.1)      (0.1)
Exchange adjustments..................      (8.0)        (9.1)      (5.0)        (7.0)     (29.1)
                                           -----         ----       ----         ----      -----
At 5 April 1997.......................     111.8         46.7       48.8         87.3      294.6
                                           -----         ----       ----         ----      -----
</TABLE>
                                                      
    Other, including reorganization and warranty provisions of (pound)48.8
million (1996 (pound)43.4 million and 1995 (pound)54.0 million), includes
(pound)nil million (1996 (pound)7.8 million and 1995 (pound)15.0 million) for
the integration and reorganization costs arising on the restructuring of
acquired businesses. (pound)7.0 million was utilized in the year (1996
(pound)7.2 million and 1995 (pound)15.1 million).




                                      F-24
<PAGE>   25
                       NOTES TO THE ACCOUNTS (CONTINUED)



21  PROVISIONS FOR LIABILITIES AND CHARGES (CONTINUED)


<TABLE>
<CAPTION>
                                                                          DEFERRED
                                                                            TAX       TOTAL
                                                                          --------    -----
                                                                          (POUND)M   (POUND)M
<S>                                                                       <C>         <C> 
COMPANY
At 2 April 1995.........................................................    13.6       13.6
Charged in year.........................................................   (11.9)     (11.9)
Advance corporation tax.................................................    5.9        5.9
                                                                           -----      ----- 

At 6 April 1996.........................................................    7.6        7.6
                                                                           -----      ----- 
Charged in year.........................................................   (1.0)      (1.0)
Advance corporation tax.................................................   (0.1)      (0.1)
                                                                           -----      ----- 
At 5 April 1997.........................................................    6.5        6.5
                                                                           -----      ----- 
</TABLE>



<TABLE>
<CAPTION>
                                                                     DEFERRED TAX
                                                     ------------------------------------------
                                                                  1997                  1996
                                                       1997       FULL        1996      FULL
                                                      AMOUNT    POTENTIAL    AMOUNT   POTENTIAL
                                                     PROVIDED   LIABILITY   PROVIDED  LIABILITY
                                                     --------   ---------   --------  ---------  
                                                     (POUND)M   (POUND)M    (POUND)M   (POUND)M
<S>                                                  <C>        <C>         <C>       <C> 
GROUP
Excess tax allowances over depreciation...........      21.1      142.7       16.7       89.4
Other timing differences..........................      78.0       78.0       72.3       72.3
Advance corporation tax...........................     (11.8)     (11.8)     (11.7)     (11.7)
                                                       -----      -----      -----      ----- 
                                                        87.3      208.9       77.3      150.0
                                                       -----      -----      -----      ----- 

COMPANY
Excess tax allowances over depreciation...........       0.2        0.2        0.2        0.2
Other timing differences..........................      18.1       18.1       19.1       19.1
Advance corporation tax...........................     (11.8)     (11.8)     (11.7)     (11.7)
                                                       -----      -----      -----      ----- 
                                                         6.5        6.5        7.6        7.6
                                                       -----      -----      -----      ----- 
</TABLE>

    No provision has been made for the taxation liabilities which could arise in
the Group if certain freehold properties and other fixed assets were realized at
their balance sheet values. The potential liability is estimated at (pound)190.3
million (1996 (pound)211.3 million).

    No provision has been made for additional taxation liabilities which may
arise if retained profits of certain overseas subsidiary and associated
undertakings are remitted to the United Kingdom.

22  CALLED UP SHARE CAPITAL

<TABLE>
<CAPTION>
                                                                                    1997          1996
                                                                                    ----          ----
                                                                                  (POUND)M      (POUND)M
<S>                                                                               <C>            <C>  
AUTHORIZED:  960,000,000 (1996 480,000,000) ordinary shares of 25p each.......      240.0         120.0
                                                                                    -----         -----
ISSUED, ALLOTTED AND FULLY PAID:  473,495,708 (1996 428,997,343)
    ordinary shares of 25p each...............................................      118.4          107.2
                                                                                    -----         -----
</TABLE>

    On 10 April 1996, 189,224 shares and on 1 October 1996, 623,509 shares at
nominal value 25p each were issued in lieu of dividends for nominal value of
(pound)0.2 million (value (pound)7.0 million). A further 755,492 shares at
nominal value 25p each were issued under the share option scheme for proceeds of
(pound)4.2 million.

    During the year, the Company issued 42,930,140 shares in connection with the
acquisition of Unitech plc.




                                      F-25
<PAGE>   26
                        NOTES TO THE ACCOUNTS (CONTINUED)

22  CALLED UP SHARE CAPITAL (CONTINUED)

    At 5 April 1997, options were outstanding as follows:

<TABLE>
<CAPTION>
                                                       NO. OF SHARES
                                                    --------------------
                                                                                                   OPTION
                                                    1997             1996      DESCRIPTION         PRICE
                                                    -----           -----      -----------         ------
<S>                                              <C>            <C>            <C>             <C>   
Executive Scheme (August 1987 grant) ....           6,447           6,447       Ordinary       (pound)2.6566
Executive Scheme 1993 (December 1993
  grant).................................         759,000       1,505,000       Ordinary       (pound)5.6250
Executive Scheme 1993 (July 1994 grant)..          80,000         105,000       Ordinary       (pound)5.9950
Executive Scheme 1993 (December 1994 
  grant) ................................         135,000         140,000       Ordinary       (pound)5.3650
Executive Scheme 1993 (July 1995 grant)..         245,000         300,000       Ordinary       (pound)6.4850
Executive Scheme 1993 (December 1995     
  grant) ................................       1,620,000       1,670,000       Ordinary       (pound)7.8850
Executive Scheme 1993 (July 1996 grant)..         480,000              --       Ordinary       (pound)9.3550
Executive Scheme 1993 (December 1996
  grant) ................................         655,000              --       Ordinary       (pound)9.9450
Unitech Executive Scheme Rollover
  (September 1995) ......................         150,681              --       Ordinary       (pound)6.9100
Savings Related Share Option Scheme 1996
  (January 1997) ........................         660,357              --       Ordinary       (pound)8.6900
Unitech Savings Related Share Option
Scheme Rollover (Various)................         288,092              --       Ordinary       (pound)1.47-(pound)5.15
</TABLE>


    For all the executive schemes options are exercisable in normal
circumstances between the third and the tenth anniversary of the date of grant.
Under the Savings Related Share Option Scheme 1996 options for 235,226 shares
are exercisable on the third anniversary and for 425,131 shares on the fifth
anniversary from the start of the savings contract. The options granted under
the Unitech Savings Related Share Option Scheme Rollover are exercisable on the
fifth anniversary of the start of the savings contract.

23  RESERVES

<TABLE>
<CAPTION>
                                                                                  OTHER
                                                                                 RESERVES
                                            SHARE                    EXCHANGE     TOTAL
                                           PREMIUM      MERGER      VARIATION     OTHER       REVENUE
                                           ACCOUNT     RESERVE       RESERVE     RESERVES     RESERVE
                                            -----       ------        -----       ------       -----
                                           (POUND)M    (POUND)M      (POUND)M    (POUND)M     (POUND)M
<S>                                        <C>         <C>          <C>          <C>          <C> 
GROUP
At 1 April 1995 .....................       393.4           --        (10.3)       (10.3)       476.0
Reallocation in respect of scrip 
  dividends..........................        (8.7)          --           --           --          8.7
Profit attributable to the members of 
  Siebe plc .........................          --           --         21.9         21.9        193.0
Dividends -- total ..................          --           --           --           --        (57.2)
  Less scrip element ................        (0.1)          --           --           --          3.3
New share capital subscribed ........         0.6           --           --           --           --
Goodwill written off ................          --           --           --           --        (65.5)
                                            -----       ------       ------       ------        -----
At 6 April 1996 .....................       385.2           --         11.6         11.6        558.3
                                            -----       ------       ------       ------        -----
Profit attributable to the members of 
  Siebe plc .........................          --           --           --           --        253.8
Dividends -- total ..................          --           --           --           --        (73.4)
  Less scrip element ................          --           --           --           --          6.8
Currency translation differences (on
  foreign currency net investments)..          --           --       (158.2)      (158.2)          --
New share capital subscribed ........         4.0        361.3           --        361.3           --
Transfer to goodwill ................          --           --           --           --          3.9
Goodwill written off ................          --       (361.3)          --       (361.3)       (93.8)
                                            -----       ------       ------       ------        -----
At 5 April 1997 .....................       389.2           --       (146.6)      (146.6)       655.6
                                            -----       ------       ------       ------        -----
</TABLE>


                                      F-26


<PAGE>   27
                        NOTES TO THE ACCOUNTS (CONTINUED)

23  RESERVES (CONTINUED)

    Transfer to goodwill of (pound)3.9 million represents a transfer from
Revenue Reserve to goodwill written off relating to the 1995/96 final dividend
on shares issued to acquire Unitech plc which is part of the total consideration
paid for Unitech plc.

    The cumulative amount to goodwill resulting from acquisitions which has been
written off between 1 April 1984 and 5 April 1997 is (pound)810.3 million (1996
(pound)355.2 million and 1995 (pound)289.7 million), of which (pound)578.6
million (1996 (pound)217.3 million and 1995 (pound)217.3 million) has been
charged to Merger Reserve and (pound)231.7 million (1996 (pound)137.9 million
and 1995 (pound)72.4 million) to Revenue Reserve.


<TABLE>
<CAPTION>
                                                                             OTHER
                                                                           RESERVES
                                             SHARE              EXCHANGE     TOTAL
                                            PREMIUM    MERGER   VARIATION    OTHER     REVENUE
                                            ACCOUNT   RESERVE    RESERVE    RESERVES   RESERVE
                                             -----     -----     -------     -----      ----
                                           (POUND)M   (POUND)M  (POUND)M    (POUND)M   (POUND)M
<S>                                        <C>        <C>       <C>        <C>         <C> 
COMPANY
At 1 April 1995..........................    393.4     217.3        --      217.3       64.1
Reallocation in respect of scrip         
  dividends..............................    (8.7)        --        --         --        8.7
Profit for year..........................       --        --        --         --       79.3
Dividends - total........................       --        --        --         --     (57.2)
  Less scrip element.....................    (0.1)        --        --         --        3.3
Exchange variations......................       --        --        --         --        1.8
New share capital subscribed.............      0.6        --        --         --         --
                                             -----     -----      ----      -----      -----
At 6 April 1996..........................    385.2     217.3        --      217.3      100.0
                                             -----     -----      ----      -----      -----

Profit for year..........................       --        --        --         --       80.0
Dividends - total........................       --        --        --         --     (73.4)
  Less scrip element.....................       --        --        --         --        6.8
Exchange variations......................       --        --        --         --        1.6
New share capital subscribed.............      4.0     361.3        --      361.3         --
                                             -----     -----      ----      -----      -----
At 5 April 1997..........................    389.2     578.6        --      578.6      115.0
                                             -----     -----      ----      -----      -----
</TABLE>


    Following a review of the Company's scrip dividend scheme in Fiscal 1996 it
was concluded that shares which have been issued as an alternative to cash
dividends have the legal form of a bonus issue. Accordingly, the accounting
treatment was changed to reflect this. Previously, scrip dividends were dealt
with as if the cash alternative had been received by the shareholders and
immediately reinvested in shares.


                                      F-27


<PAGE>   28
                        NOTES TO THE ACCOUNTS (CONTINUED)

24  COMMITMENTS

    Capital expenditure authorized and contracted at the balance sheet date but
for which no provision has been made in the accounts amounted to (pound)9.1
million (1996 (pound)17.8 million).

    Payments under operating leases in the year to 4 April 1998 are as follows:

<TABLE>
<CAPTION>
                                                         1997                                1996
                                           -------------------------------      ------------------------------
                                                         OTHER                               OTHER
                                             LAND &    OPERATING                 LAND &    OPERATING
                                           BUILDINGS     LEASES      TOTAL      BUILDINGS   LEASES       TOTAL
                                           ---------   ---------     -----      ---------  ---------      ----
                                            (POUND)M    (POUND)M    (POUND)M    (POUND)M    (POUND)M    (POUND)M
<S>                                        <C>         <C>          <C>         <C>         <C>         <C>        
GROUP                                                                                                   
Leases expiring                                                                                         
Within 1 year............................      4.5         6.4        10.9         2.5         5.4         7.9
Between 2 and 5 years....................      7.3        28.5        35.8         5.3        32.1        37.4
More than 5 years........................     21.1         5.1        26.2        17.9         4.0        21.9
                                              ----        ----        ----        ----        ----        ----
                                              32.9        40.0        72.9        25.7        41.5        67.2
                                              ----        ----        ----        ----        ----        ----
COMPANY                                                                                                 
Leases expiring                                                                                         
Between 2 and 5 years....................      --          0.3         0.3         --          0.3         0.3
More than 5 years........................      0.5        --           0.5         1.0        --           1.0
                                              ----        ----        ----        ----        ----        ----
                                               0.5         0.3         0.8         1.0         0.3         1.3
                                              ----        ----        ----        ----        ----        ----
</TABLE>

25  PENSIONS

    The Group operates pension schemes for the majority of employees. The larger
schemes, in the United Kingdom and United States, are of the defined benefit
type, and costs are assessed with the advice of independent qualified actuaries
using the projected unit method. These schemes cover 25.4% of Group employees.
The assets of these schemes are held in separate trustee administered funds.

    The dates of the latest actuarial valuations fall between 31 January 1996
and 31 March 1997 and the market value of the assets of the principal schemes
was (pound)434.0 million.

    For the purposes of assessing funding levels and contributions under SSAP24
and FAS87, the principal actuarial assumptions used were investment returns of
8% to 9.5% per annum and pay growth of 4% to 6.5% per annum. Actuarial asset
values were determined for the United Kingdom schemes using discounted future
investment income methods assuming dividend growth rates of 4.5% per annum. For
the remainder, market or smoothed market value methods were adopted. The
aggregate actuarial value of assets in the main funds in the United Kingdom and
the United States represented 100.9% of the benefits which had accrued to
members after allowing for expected increases in earnings.

    Debtors falling due within one year, creditors falling due within one year
and creditors falling due after more than one year include (pound)37.8 million,
(pound)2.5 million and (pound)12.3 million, respectively, for pension
prepayments and accruals (1996 (pound)35.4 million, (pound)2.0 million and
(pound)18.6 million, respectively).

    OTHER POST-EMPLOYMENT BENEFITS The Group operates a number of plans under
which approximately 15,000 employees are eligible to receive benefits after
retirement. These plans are principally in the United States and are in respect
of medical benefits. The method of accounting for these is similar to that used
for defined benefit pension schemes. The United States arrangements were
actuarially valued as at 5 April 1997; the principal assumptions are that the
long-term increase in health costs will be in the range of 4% to 8% per annum
and a discount rate of 7.75%. The cost of these benefits charged to the profit
and loss account was (pound)4.4 million (1996 (pound)5.4 million). In addition,
the Group makes payments to various ex-employees under medical and workers'
compensation agreements.

26  CONTINGENT LIABILITIES

    GROUP There are contingent liabilities in respect of guarantees and bank
indemnities totalling (pound)96.4 million (1996 (pound)104.0 million).

    COMPANY The Company has contingent liabilities in respect of guarantees of
subsidiary undertakings' bank loans and overdrafts and bank indemnities
totalling (pound)65.0 million (1996 (pound)408.1 million).


                                      F-28


<PAGE>   29
                        NOTES TO THE ACCOUNTS (CONTINUED)

27  CASH FLOW STATEMENT

    Reconciliation of operating profit to net cash inflow from operating
activities


<TABLE>
<CAPTION>
                                                                           1997        1996
                                                                          ------       ------ 
                                                                        (POUND)M     (POUND)M
<S>                                                                     <C>          <C>      
Operating profit .................................................         469.9        371.2
Depreciation charges .............................................         146.6        121.4
Profit in associated undertakings ................................          (0.3)        (0.5)
Decrease in stocks ...............................................          29.9          7.8
Increase in debtors ..............................................         (67.6)       (60.9)
Decrease in creditors/provisions .................................         (56.5)        (1.9)
                                                                           -----        -----
Net cash inflow from operating activities.........................         522.0        437.1
                                                                           -----        -----
</TABLE>


        Analysis of the net outflow of cash in respect of the purchase of
        subsidiary undertakings

<TABLE>
<CAPTION>

                                                                           1997        1996
                                                                          ------       ------ 
                                                                        (POUND)M     (POUND)M
<S>                                                                     <C>          <C>      
Cash consideration ...............................................         260.9        101.2
Less paid in the year ended 6 April 1996 .........................        (103.1)          --
                                                                           -----        -----
                                                                           157.8        101.2
                                                                           -----        -----
</TABLE>

        Reconciliation of net cash flow to movement in net debt


<TABLE>
<CAPTION>
                                                                           1997        1996
                                                                          ------       ------ 
                                                                        (POUND)M     (POUND)M
<S>                                                                     <C>          <C>      
(Decrease)/increase in cash in the period ........................         (59.9)        10.4  
Cash inflow from increase in debt and lease financing ............         (22.2)       (80.9)
Cash outflow/(inflow) from increase/(decrease) in liquid resources           2.8         (0.6)
Change in net debt resulting from cash flows .....................         (79.3)       (71.1)
Loans and finance leases acquired with subsidiary undertakings ...         (87.2)       (10.1)
New finance leases ...............................................          (5.1)        (5.1)
Translation differences ..........................................          39.5        (35.0)
Movement in net debt in the year .................................        (132.1)      (121.3)
Net debt at the start of the year ................................        (432.3)      (311.0)
                                                                          ------       ------ 
Net debt at the end of the year ..................................        (564.4)      (432.3)
                                                                          ------       ------ 
</TABLE>

        Analysis of changes to net debt


<TABLE>
<CAPTION>
                                                    ACQUISITIONS
                                                     (EXCLUDING    OTHER
                                AT                    CASH AND     NON-CASH   EXCHANGE      AT
                           1 APRIL 1995   CASH FLOW  OVERDRAFTS)   CHANGES*  MOVEMENT   6 APRIL 1996
                              ------       -------     -------     -------    ------     ------
                             (POUND)M      (POUND)M   (POUND)M    (POUND)M   (POUND)M   (POUND)M
<S>                        <C>             <C>      <C>            <C>       <C>        <C>
Cash at bank and in hand...    158.2           7.3                              (2.6)     162.9
Overdrafts.................    (25.1)          3.1                              (0.7)     (22.7)
                                              10.4

Debt due within 1 year.....   (111.0)         54.5        (4.3)       11.3      (3.5)     (53.0)
Debt due after 1 year......   (411.9)       (153.8)       (5.8)      (11.3)    (26.0)    (608.8)
Finance leases.............    (43.1)         18.4         --         (5.1)     (0.3)     (30.1)
                                             (80.9)

Short-term deposits........    121.9          (0.6)        --         --        (1.9)     119.4
                              ------        ------     -------     -------    ------     ------

Total......................   (311.0)        (71.1)      (10.1)       (5.1)    (35.0)    (432.3)
                              ------        ------     -------     -------    ------     ------

Cash at bank and in hand...    158.2                                                      162.9
Short-term deposits........    121.9                                                      119.4
                              ------                                                     ------
Cash and deposits..........    280.1                                                      282.3
                              ------                                                     ------
</TABLE>


* Other movements comprise transfers between categories of debt and new finance
  leases.


                                      F-29


<PAGE>   30
                        NOTES TO THE ACCOUNTS (CONTINUED)

27  CASH FLOW STATEMENT (CONTINUED)


<TABLE>
<CAPTION>
                                                                ACQUISITIONS
                                                                 (EXCLUDING       OTHER
                                     AT                           CASH AND       NON-CASH      EXCHANGE           AT
                                6 APRIL 1996      CASH FLOW      OVERDRAFTS)     CHANGES*      MOVEMENT       5 APRIL 1997
                                ------------      ---------      -----------     --------      --------       ------------
                                  (POUND)M        (POUND)M        (POUND)M       (POUND)M       (POUND)M       (POUND)M
<S>                             <C>               <C>           <C>              <C>           <C>            <C>
Cash at bank and in hand            162.9           (54.9)                                       (19.6)           88.4
Overdrafts .............            (22.7)           (5.0)                                         4.3           (23.4)
                                                    (59.9)

Debt due within 1 year .            (53.0)           20.4          (12.1)          (9.9)           7.9           (46.7)
Debt due after 1 year ..           (608.8)          (56.1)         (90.1)           9.9           64.0          (681.1)
Finance leases .........            (30.1)           13.5           (4.6)          (5.1)           2.3           (24.0)
                                                    (22.2)

Short-term deposits ....            119.4             2.8           19.6           --            (19.4)          122.4
                                    -----           -----           ----           ----           ----           -----
Total ..................           (432.3)          (79.3)         (87.2)          (5.1)          39.5          (564.4)
                                    -----           -----           ----           ----           ----           -----

Cash at bank and in hand            162.9                                                                         88.4
Short-term deposits ....            119.4                                                                        122.4
                                    -----                                                                        -----
Cash and deposits ......            282.3                                                                        210.8
                                    -----                                                                        -----
</TABLE>


* Other movements comprise transfers between categories of debt and new finance
  leases.

28  ACQUISITIONS AND DISPOSALS

    During Fiscal 1997, the Group acquired 100% of the issued share capital of
Unitech Limited, previously Unitech plc ('Unitech'), ERO Electronic S.p.A.,
Controlli SpA, Satchwell Controls Limited, Barcol Air AG, Elbit-ATI, Predictive
Control Limited and the trade and assets of Demag Mannesmann and VTA Power
Application Division. The purchase consideration, including professional and
associated costs, amounted to (pound)622.8 million.

    Investment in subsidiary undertakings shown in the consolidated cash flow
statement is the cash payment for acquisitions noted above.

    UNITECH  The acquisition of Unitech was completed during the year. In March
1996, the Company purchased a 25% interest in Unitech for a cash consideration
of (pound)103.1 million. Following a recommended offer made on 11 April 1996,
the Company acquired substantially all of the balance of the Unitech shares on 2
May 1996, and acquired the balance of the Unitech shares at various dates during
June and July 1996 for consideration comprising the issue of 42,930,140 ordinary
shares of 25p each in the Company and additional cash consideration, including
expenses, of (pound)21.7 million. The fair value of the total consideration was
(pound)496.9 million.


                                      F-30


<PAGE>   31
                       NOTES TO THE ACCOUNTS (CONTINUED)

28  ACQUISITIONS AND DISPOSALS (CONTINUED)

    The following table analyzes the fair value of the net assets of Unitech
acquired during the year:


<TABLE>
<CAPTION>
                                                                                                 FAIR
                                                               ACCOUNTING                        VALUE
                                                  BOOK           POLICY        FAIR VALUE          OF
                                                  VALUE        ADJUSTMENT      ADJUSTMENT     NET ASSETS
                                                   ----           ----             ---           -----
                                                 (POUND)M       (POUND)M         (POUND)M      (POUND)M
<S>                                              <C>           <C>             <C>            <C> 
GROUP
Intangible fixed assets ..............             --             89.6            --              89.6
Tangible fixed assets ................            107.3           --              20.7           128.0
Trade investments ....................             15.1           (0.8)           --              14.3
Stocks ...............................             80.8           (5.9)           --              74.9
Debtors ..............................            126.0           --              --             126.0
Cash and deposits ....................             34.6           --              --              34.6
Short-term loans .....................            (33.4)          --              --             (33.4)
Long-term debt .......................            (90.8)          --              --             (90.8)
Short-term creditors .................            (85.1)          --              (7.9)          (93.0)
Provisions for liabilities and charges            (13.9)          --              (9.5)          (23.4)
Minority interest ....................            (68.7)         (16.3)           (1.3)          (86.3)
                                                   ----           ----             ---           -----
                                                   71.9           66.6             2.0           140.5
                                                   ----           ----             ---           -----
Consideration -- paid in cash ........                                                           124.8
              -- paid in shares ......                                                           372.1
                                                                                                 -----
Goodwill .............................                                                           356.4
                                                                                                 -----
</TABLE>


        Unitech contributed in 1996/1997 (11 months) profit before tax of
(pound)43.0 million, after allocating group interest and head office costs.

        Unitech contributed in 1996/1997 (11 months) (pound)85.0 million to the
Group's net cash inflow from operating activities, paid (pound)8.9 million in
respect of net returns on investments and servicing of finance, paid (pound)16.9
million in respect of taxation, utilized (pound)33.8 million for capital
expenditure and financial investments and paid (pound)3.0 million of equity
dividends.

        An amount of (pound)0.5 million has been charged to the Group profit and
loss account in respect of costs incurred in reorganizing, restructuring and
integrating the acquisition in the period from 2 May 1996 to 5 April 1997.

        The summarized profit and loss account for the period from 1 June 1995
to 2 May 1996 shown on the basis of the accounting policies of Unitech prior to
the acquisition, is as follows:


<TABLE>
<CAPTION>
                                                       (POUND)M
                                                         -----
<S>                                                    <C>  
Turnover ....................................            376.9
                                                         -----
Operating profit, before exceptional items ..             35.6

Profit on ordinary activities before taxation             25.3
Tax on profit on ordinary activities ........            (12.8)
                                                         -----
Profit on ordinary activities after taxation              12.5
Minority interests ..........................             (5.3)
                                                         -----
Profit for the financial period .............              7.2
                                                         -----
</TABLE>


        Profit on ordinary activities before tax is arrived at after charging
exceptional costs of (pound)7.3 million, comprising (pound)2.2 million of costs
relating to the Siebe plc bid for Unitech and provision for legal disputes
arising in the normal course of business. In the year ended 31 May 1995 the
profit after taxation and minority interests was (pound)18.7 million.

        Total recognized gains and losses for the period from 1 June 1995 and 2
May 1996 comprise the profit for the financial period of (pound)7.2 million and
translation gain on foreign currency net investments of (pound)5.6 million.


                                      F-31


<PAGE>   32
                        NOTES TO THE ACCOUNTS (CONTINUED)

28  ACQUISITIONS AND DISPOSALS (CONTINUED)

    OTHER ACQUISITIONS

    The following table analyzes the fair value of the net assets acquired for
the other acquisitions during the year:


<TABLE>
<CAPTION>
                                                                                                     FAIR
                                                                     ACCOUNTING                      VALUE
                                                                       POLICY      FAIR VALUE       OF NET
                                                    BOOK VALUE       ADJUSTMENT    ADJUSTMENT        ASSETS
                                                       ----             ----          ----            ----
                                                     (POUND)M         (POUND)M      (POUND)M        (POUND)M
GROUP
<S>                                                 <C>              <C>           <C>              <C> 
Intangible fixed assets............................       5.7             27.6           --           33.3
Tangible fixed assets..............................      28.4               --         13.4           41.8
Investments in associated undertakings.............       0.1               --           --            0.1
Stocks.............................................      23.8               --           --           23.8
Debtors............................................      43.1               --           --           43.1
Cash and deposits..................................       0.9               --           --            0.9
Short-term loans...................................     (30.3)              --           --          (30.3)
Long-term debt.....................................      (3.9)              --           --           (3.9)
Short-term creditors...............................     (31.9)              --           --          (31.9)
Long-term creditors................................      (1.3)              --           --           (1.3)
Provisions for liabilities and charges.............     (20.0)              --         (2.0)         (22.0)
Minority interest..................................        --             (0.9)          --           (0.9)
                                                         ----             ----         ----           ----
                                                         14.6             26.7         11.4           52.7
                                                         ----             ----         ----           ----
Consideration -- paid in cash......................                                                  117.8
              -- deferred consideration............                                                    8.1
                                                                                                      ----
Goodwill...........................................                                                   73.2
                                                                                                      ----
</TABLE>



<TABLE>
<CAPTION>
                                                  (POUND)M
                                                    ----
<S>                                               <C> 
Goodwill on the acquisition of:
ERO Electronic S.p.A ...................            11.2
Controlli SpA ..........................             4.8
Satchwell Controls Limited .............            46.1
Barcol Air AG ..........................             9.1
Elbit - ATI ............................             1.6
Predictive Control Limited .............             1.9
Demag Mannesmann Compressed Air Division            (2.6)
VTA Power Application Division .........             1.1
                                                    ----
                                                    73.2
                                                    ----
</TABLE>


    In the fair value tables, the fair values attributed to intangible fixed
assets represent market values of intangible fixed assets acquired, principally
patents, licenses and trademarks, and have been based upon professional
valuations. The fair values attributed to the tangible fixed assets represent
revaluations of tangible fixed assets acquired and have been based upon
professional valuations, on the basis of their open market existing use or
depreciated replacement cost as appropriate. The minority interest adjustments
comprise the minority interest share of these fixed asset adjustments.

    The other accounting policy adjustment relates principally to an alignment
of stock provisions in Unitech with those adopted by Siebe plc.

    Fair value adjustments for provisions for liabilities and charges comprise
recognition of unprovided amounts in respect of pensions ((pound)4.5 million)
and tax liabilities ((pound)7.0 million) and fair value adjustments to
short-term creditors comprise recognition of unprovided amounts in respect of
onerous contracts and other liabilities.

    The Group also paid (pound)18.3 million in cash relating to deferred
payments for companies acquired in the prior year.

    The acquisitions (excluding Unitech) contributed profit before tax of
(pound)5.4 million, after allocating group interest and head office costs. The
acquisitions (excluding Unitech) incurred losses before tax of (pound)4.4
million for the period from the start of their financial year to the date of
acquisition and earned profits before tax of (pound)10.6 million for the
previous financial year.


                                      F-32


<PAGE>   33
                        NOTES TO THE ACCOUNTS (CONTINUED)

28  ACQUISITIONS AND DISPOSALS (CONTINUED)

    The acquisitions (excluding Unitech) contributed (pound)13.1 million to the
Group's cash inflow from operating activities, paid (pound)4.0 million in
respect of net returns on investments and servicing of finance, received
(pound)1.5 million in respect of taxation and utilized (pound)0.4 million for
capital expenditure and financial investments during 1997.

    In addition, the Group acquired further minority interests, principally the
remaining 51% in Mahle GmbH, a further 8% in Gestra AG and the remaining 17% in
Eliwell S.p.A. for a total cash and deferred consideration of (pound)35.6
million with resulting goodwill of (pound)25.5 million.

    During fiscal 1996, the Group acquired 100% of the issued share capital of
Form Rite Corp, Form Rite (Canada) Ltd, Foxboro L & N (formerly L & N SCADA), P
& W Ventil-und Regler Service GmbH, 80% of Siebe Fluid Systems Ltda (formerly
Tubotecnica Termoplasticos Ltda), the remaining 65% of Triconex Solutions SA not
already owned by the Group and 49% of Mahle Kompressoren GmbH and its subsidiary
AGRE-Kompressoren Druckluftgerate Ges.m.b.H (over which the Group exercises a
dominant influence) with a commitment to acquire a further 2%. The purchase
consideration, including professional and associated costs, amounted to
(pound)86.9 million.

    The above acquisitions contributed profit before tax of (pound)3.2 million,
after allocating group interest and head office costs.

    The acquisitions earned profit before tax of (pound)1.2 million for the
period from the start of their financial year to the date of acquisition and
earned profit before tax of (pound)6.5 million for the previous financial year.

    Investment in subsidiary undertakings shown in the consolidated cash flow
statement is the cash payment for acquisitions noted above.

    The following table analyzes the fair value of the net assets acquired
during fiscal 1996:


<TABLE>
<CAPTION>
                                                                                             FAIR
                                                                                             VALUE
                                                                            FAIR VALUE       OF NET
                                                              BOOK VALUE    ADJUSTMENT       ASSETS
                                                              ----------    ----------       ------
                                                               (POUND)M      (POUND)M       (POUND)M
GROUP
<S>                                                           <C>           <C>             <C>
Intangible fixed assets..................................         1.8           7.1            8.9
Tangible fixed assets....................................        18.7          14.7           33.4
Investments in associated undertakings...................         0.3            --            0.3
Stocks...................................................        22.3            --           22.3
Debtors..................................................        19.8            --           19.8
Cash at bank and in hand.................................         4.8            --            4.8
Short-term loans.........................................        (4.3)           --           (4.3)
Long-term debt...........................................        (5.8)           --           (5.8)
Short-term creditors.....................................       (18.8)           --          (18.8)
Long-term creditors......................................        (3.7)           --           (3.7)
Deferred tax                                                      1.4            --            1.4
Provisions for liabilities and charges...................        (5.4)           --           (5.4)
Minority interest........................................        (9.6)           --           (9.6)
                                                                 ----          ----           ----
                                                                 21.5          21.8           43.3
                                                                 ----          ----           ----
Consideration -- paid in cash............................                                     79.1
              -- deferred cash...........................                                      7.8
              -- transfer from associated undertakings...                                      2.5
                                                                                              ----
Goodwill.................................................                                     46.1
                                                                                              ----
</TABLE>


    The Group also paid (pound)22.1 million in cash relating to deferred
payments for companies acquired in the prior year.

    The subsidiary undertakings acquired during 1996 contributed (pound)11.6
million to the Group's net operating cash flows and paid (pound)1.0 million in
respect of net returns on investments and servicing of finance, paid (pound)0.5
million in respect of taxation and utilized (pound)8.8 million for investing
activities.

    In addition, the Group acquired the remaining 40% minority interest in
Fabex, Inc., a further 11.3% of the share capital of Gestra AG and a further
8.3% of the share capital of Eliwell S.p.A. for a total consideration of
(pound)34.0 million of which (pound)5.5 million was paid in cash and (pound)28.5
million as deferred cash consideration with resulting goodwill of (pound)19.4
million.


                                      F-33


<PAGE>   34
                        NOTES TO THE ACCOUNTS (CONTINUED)

28  ACQUISITIONS AND DISPOSALS (CONTINUED)

    Goodwill on the acquisition of:


<TABLE>
<CAPTION>
                                                      (POUND)M
                                                        ----
<S>                                                   <C> 
Form Rite Corp, including Form Rite (Canada)            32.7
Fabex Inc. (40%) ...........................            18.6
Other ......................................            14.2
                                                        ----
                                                        65.5
                                                        ----
</TABLE>


29  POST BALANCE SHEET EVENT

    On 15 May 1997, the Company made a recommended offer for APV plc ('APV') on
the basis of 0.10955 new Siebe shares for each APV share or alternatively 97.5p
in cash for each APV share, which values the issued and to be issued ordinary
share capital of APV at approximately (pound)338.4 million.


                                      F-34


<PAGE>   35
                        UNAUDITED CONSOLIDATED PROFIT AND LOSS ACCOUNT


<TABLE>
<CAPTION>
                                                    SIX MONTHS       SIX MONTHS
                                                     ENDED 30         ENDED 30
FOR THE SIX MONTHS ENDED 30 SEPTEMBER               SEPTEMBER,       SEPTEMBER,
1997 AND 30 SEPTEMBER 1996                 NOTES       1997             1996
                                           -----    ----------      -----------
                                                     (POUND)M         (POUND)M
<S>                                        <C>      <C>             <C>    
TURNOVER..............................
Continuing Operations.................                 1,448.9          1,471.4
Acquisitions..........................                   257.6             --
                                                    ----------      -----------
                                             1         1,706.5          1,471.4
                                                    ----------      -----------
OPERATING PROFIT
Continuing Operations.................                   237.2            216.0
Acquisitions..........................                    14.2             --
                                                    ----------      -----------
                                             1           251.4            216.0
Profit on sale of fixed assets........                     2.8              2.8
Profit on sale of businesses..........                    --               --
                                                    ----------      -----------
PROFIT BEFORE INTEREST................                   254.2            218.8
Interest - net........................                   (32.5)           (28.4)
                                                    ----------      -----------
PROFIT BEFORE TAXATION................                   221.7            190.4
Taxation..............................       2           (79.4)           (71.4)
                                                    ----------      -----------
PROFIT AFTER TAXATION.................                   142.3            119.0
Minority interests....................                    (5.4)            (6.9)
                                                    ----------      -----------
PROFIT ATTRIBUTABLE TO MEMBERS OF SIEBE                  136.9            112.1
  PLC.................................
Dividends.............................       3           (30.2)           (27.0)
                                                    ----------      -----------
TRANSFER TO REVENUE RESERVE...........                   106.7             85.1
                                                    ----------      -----------

EARNINGS PER SHARE....................       4            27.7p            24.0p

Average exchange rates for the period
US$/(pound)1..........................                     1.63             1.54
Yen/(pound)1..........................                   194.01           167.11
DM/(pound)1...........................                     2.87             2.33
</TABLE>

        The figures for the six months to 30 September 1997 have been prepared
on the same basis of accounting as for the 52 weeks to 5 April 1997 and are
unaudited.


                                      F-35


<PAGE>   36
                      UNAUDITED CONSOLIDATED BALANCE SHEET


<TABLE>
<CAPTION>
                                     SEPTEMBER  SEPTEMBER   
                                     30, 1997   30, 1996    
                                     -------    -------     
                                     (POUND)M   (POUND)M    
<S>                                  <C>        <C>         
FIXED ASSETS
Intangible assets................      489.3      434.6     
Tangible assets..................    1,237.7    1,086.1     
Investment in associated
undertakings.....................        5.7        2.1     
Trade investments................       11.0       19.5     
                                     -------    -------     
                                     1,743.7    1,542.3     
                                     -------    -------     
CURRENT ASSETS
Stock and work in progress.......      606.4      534.0     
Debtors..........................    1,149.3      901.7     
Cash and deposits................      250.3      270.3     
                                     -------    -------     
                                     2,006.0    1,706.0     
Creditors:
amounts falling due within one
  year
Short-term borrowings............      (43.8)     (68.9)    
Other creditors..................   (1,080.0)    (800.4)    
                                     -------    -------     
                                    (1,123.8)    (869.3)    
                                     -------    -------     
NET CURRENT ASSETS...............      882.2      836.7     
                                     -------    -------     
Total assets less current        
  liabilities....................    2,625.9    2,379.0     
Creditors:
amounts falling due after more
  than one year
Loans and other borrowings.......     (875.5)    (775.6)    
Other creditors..................      (49.3)     (46.1)    
                                     -------    -------     
                                      (924.8)    (821.7)    
Provisions for liabilities and   
  charges........................     (355.1)    (294.4)    
                                     -------    -------     
NET ASSETS.......................    1,346.0    1,262.9     
                                     =======    =======     

CAPITAL AND RESERVES
Share capital....................      126.1      118.0     
Share premium....................      390.4      385.2     
Other reserves...................      (68.5)     (29.9)    
Revenue reserve..................      763.9      633.1     
                                     -------    -------     
SHAREHOLDERS' FUNDS -- EQUITY....    1,211.9    1,106.4     
MINORITY INTERESTS -- EQUITY.....      134.1      156.5     
                                     -------    -------     
CAPITAL EMPLOYED.................    1,346.0    1,262.9     
                                     -------    -------     

NET BORROWINGS...................      669.0      574.2     
GEARING -- SHAREHOLDERS' FUNDS...       55.2%      51.9%    
        -- CAPITAL EMPLOYED .....       49.7%      45.4%    
                                     -------    -------     

Period end exchange rates              
US$/(pound)1.....................       1.61       1.56     
Yen/(pound)1.....................     197.08     174.37     
DM/(pound)1......................       2.84       2.39     
</TABLE>


                                      F-36


<PAGE>   37
                          UNAUDITED CONSOLIDATED CASH FLOW STATEMENT


<TABLE>
<CAPTION>
FOR THE SIX MONTHS ENDED 30                               SIX MONTHS ENDED             SIX MONTHS ENDED 
SEPTEMBER 1997 AND SEPTEMBER 1996       NOTES            30 SEPTEMBER, 1997           30 SEPTEMBER, 1996 
                                         ---            --------------------        ----------------------
                                                        (POUND)M    (POUND)M        (POUND)M      (POUND)M
<S>                                     <C>             <C>         <C>             <C>           <C>
OPERATING ACTIVITIES
NET CASH FLOW FROM OPERATING
  ACTIVITIES.....................        5                            226.3                         192.3
RETURNS ON INVESTMENT AND SERVICING                                                               
  OF FINANCE                                                                                        
Interest received................                          3.0                          3.5       
Interest paid....................                        (35.2)                       (29.5)      
Interest element of finance lease                                                                 
  rental payments................                         (0.7)                        (2.2)      
Dividends paid to minority interests                      (1.2)                        (1.4)      
Dividends paid to former                                                                          
  APV/Unitech shareholders.......                         (5.0)                          --         
                                                        ------                      -------
                                                                       (39.1)                       (29.6)
TAXATION.........................                                      (35.8)                       (39.4)
                                                                                                  
CAPITAL EXPENDITURE AND FINANCIAL                                                                 
  INVESTMENTS                                                                                       
Purchase of tangible and intangible                                                               
  fixed assets...................                       (127.0)                      (107.1)      
Sale of tangible and intangible                                                                   
  fixed assets...................                         17.3                         15.1       
Purchase of trade investments....                         (0.1)                        (4.8)      
Sale of trade investments........                          6.4                          2.0       
                                                        ------                      -------
                                                                      (103.4)                       (94.8)
ACQUISITIONS AND DISPOSALS                                                                        
Purchase of associated undertakings....                   (3.2)                        --         
Sale of associated undertakings..                          0.6                          0.6       
Purchase of subsidiary undertakings....                  (52.5)                       (56.0)      
Net overdrafts and cash acquired (net of                                                          
  shares issued).................                         21.5                        (12.7)      
Purchase of minority interests...                        (10.5)                        (7.8)      
                                                        ------                      -------                
                                                                       (44.1)                       (75.9)
EQUITY DIVIDENDS PAID............                                      (21.5)                       (20.6)
                                                                                                  
MANAGEMENT OF LIQUID RESOURCES                                                                    
Movement in short-term deposits..                                        6.7                          6.9
                                                                                                  
FINANCING                                                                                         
Issue of ordinary share capital..                          1.3                         --         
Capital provided by minority                               0.3                         --         
  interests......................                                                                 
                                                                                                  
Debts due within one year:                                                                        
  Loans raised...................                         --                           20.0       
  Net loans repaid...............                        (39.9)                       (41.5)      
                                                                                                  
Debts due after more than one year:                                                               
  Other loans raised.............                        110.7                         67.3       
  Net loans repaid...............                         --                           (4.2)      
Capital element of finance lease                                                                  
  repayments.....................                         (3.9)                        --         
                                                        ------                      ------- 
                                                                        68.5                          41.6
                                                                      ------                        ------
INCREASE/(DECREASE) IN CASH......        5                              57.6                         (19.5)
                                                                      ======                        ======
</TABLE>


                                      F-37


<PAGE>   38
      UNAUDITED CONSOLIDATED STATEMENT OF TOTAL RECOGNIZED GAINS AND LOSSES


<TABLE>
<CAPTION>
                                                         SIX MONTHS      SIX MONTHS
                                                            ENDED          ENDED
                                                            30               30
                                                         SEPTEMBER,      SEPTEMBER,
                                                            1997            1996
                                                            -----           -----
                                                          (POUND)M         (POUND)M

<S>                                                      <C>             <C>  
Profit attributable to members of Siebe plc ....            136.9          112.1
Currency translation differences (on foreign
  currency net investments) ....................             (3.4)         (41.5)
                                                            -----          -----
Total recognized gains and losses for the period            133.5           70.6
                                                            -----          -----
</TABLE>


    UNAUDITED RECONCILIATION OF MOVEMENTS IN CONSOLIDATED SHAREHOLDERS' FUNDS


<TABLE>
<CAPTION>
                                                          SIX MONTHS        SIX MONTHS
                                                            ENDED             ENDED
                                                              30               30
                                                          SEPTEMBER,        SEPTEMBER,
                                                             1997             1996
                                                           -------           -------
                                                           (POUND)M          (POUND)M
<S>                                                       <C>               <C>  
Profit for the period .........................              136.9             112.1
Dividends .....................................              (30.2)            (27.0)
Currency translation differences (on foreign
  currency net investments) ...................               (3.4)            (41.5)

Share capital issued, including scrip dividends              311.7             373.6
Goodwill on acquisitions in the period ........             (219.7)           (373.1)
                                                           -------           -------
                                                             195.3              44.1
Opening shareholders' funds ...................            1,016.6           1,062.3
                                                           -------           -------
CLOSING SHAREHOLDERS' FUNDS ...................            1,211.9           1,106.4
                                                           -------           -------
</TABLE>


                                      F-38


<PAGE>   39
               UNAUDITED NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS


BASIS OF PREPARATION

        The accompanying interim consolidated financial statements of Siebe plc
and its subsidiaries as at and for the six months ended 30 September 1997 and 30
September 1996 are unaudited. In the opinion of management, all adjustments
(consisting of normal recurring adjustments) necessary for the fair presentation
of the financial statements have been included therein. The results of these
interim periods are not necessarily indicative of results for the entire year.

1  ANALYSIS OF CONSOLIDATED TURNOVER, PROFIT BEFORE INTEREST AND TAX AND
   OPERATING NET ASSETS


<TABLE>
<CAPTION>
                                                                      PROFIT           PROFIT
                                                                      BEFORE           BEFORE  
                                                                     INTEREST         INTEREST          OPERATING       OPERATING
                                  TURNOVER          TURNOVER          AND TAX          AND TAX         NET ASSETS       NET ASSETS
                                30 SEPTEMBER      30 SEPTEMBER      30 SEPTEMBER     30 SEPTEMBER     30 SEPTEMBER     30 SEPTEMBER
                                   1997              1996              1997             1996             1997              1996
                                  -------           -------           -------          -------          -------           -------
                                 (POUND)M          (POUND)M          (POUND)M         (POUND)M         (POUND)M          (POUND)M
<S>                              <C>               <C>              <C>              <C>              <C>               <C>  
PRODUCT CATEGORY:
Control systems ............        777.6             516.2             108.7             80.9          1,209.2             978.2
Temperature and appliance           669.4             695.9             114.6            103.9          1,239.4           1,177.8
  controls .................
Industrial equipment .......        259.5             259.3              28.1             31.2            213.6             201.5
                                  -------           -------           -------          -------          -------           -------
                                  1,706.5           1,471.4             251.4            216.0          2,662.2           2,357.5
                                  -------           -------           -------          -------          -------           -------
Profit on sale of fixed                                                   2.8              2.8
  assets ...................
Profit on sale of businesses                                               --               --
                                                                      -------          -------
                                                                        254.2            218.8
                                                                      -------          -------
GEOGRAPHICAL ANALYSIS BY
LOCATION:
United Kingdom .............        209.8             139.0              42.1             26.5            170.4             139.7
Rest of Europe .............        469.9             405.9              47.6             45.9            584.3             515.9
North America ..............        719.4             676.1             108.3             99.5          1,506.0           1,331.6
South America ..............         42.1              36.6               9.5              7.7             59.1              46.0
Pacific ....................        233.2             189.3              41.0             34.4            323.6             316.2
Africa and the Middle East .         32.1              24.5               2.9              2.0             18.8               8.1
                                  -------           -------           -------          -------          -------           -------
                                  1,706.5           1,471.4             251.4            216.0          2,662.2           2,357.5
                                  -------           -------           -------          -------          -------           -------
Profit on sale of fixed                                                   2.8              2.8
  assets ...................
Profit on sale of businesses                                               --               --
                                                                      -------          -------
                                                                        254.2            218.8
                                                                      -------          -------
Borrowings .................                                                                             (919.3)           (844.5)
Cash and deposits ..........                                                                              250.3             270.3
Provisions for liabilities
  and charges ..............                                                                             (355.1)           (294.4)
Taxation ...................                                                                             (216.0)           (160.9)
Dividends ..................                                                                              (76.1)            (65.1)
                                                                                                        -------           -------
                                                                                                       (1,316.2)         (1,094.6)
                                                                                                        -------           -------
NET ASSETS PER CONSOLIDATED
  BALANCE SHEET                                                                                         1,346.0           1,262.9
                                                                                                        -------           -------

GEOGRAPHICAL ANALYSIS OF
SALES BY DESTINATION:
United Kingdom ...........          151.7             104.4
Rest of Europe ...........          470.2             417.1
North America ............          676.9             628.3
South America ............           52.8              48.9
Pacific ..................          282.7             222.2
Africa and the Middle East           72.2              50.5
                                  -------           -------
                                  1,706.5           1,471.4
                                  -------           -------
</TABLE>


                                      F-39


<PAGE>   40
  UNAUDITED NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

2  TAX ON PROFIT ON ORDINARY ACTIVITIES

<TABLE>
<CAPTION>
                                                        SIX MONTHS     SIX MONTHS
                                                           ENDED         ENDED
                                                       30 SEPTEMBER   30 SEPTEMBER
                                                           1997           1996
                                                           ----           ----
                                                         (POUND)M       (POUND)M
<S>                                                    <C>            <C> 
United Kingdom corporation tax on income at 31%            14.9           14.1
Less relief for overseas tax ..................            (0.2)          (1.8)
                                                           ----           ----
                                                           14.7           12.3
Deferred tax ..................................             4.1            3.6
Overseas tax ..................................            59.4           54.7
Prior year ....................................             1.2            0.8
                                                           ----           ----
                                                           79.4           71.4
                                                           ----           ----
</TABLE>


3  DIVIDENDS


<TABLE>
<CAPTION>
                                                             SIX MONTHS    SIX MONTHS
                                                                ENDED         ENDED
                                                            30 SEPTEMBER  30 SEPTEMBER
                                                                1997          1996
                                                                ----          ----
                                                              (POUND)M       (POUND)M
<S>                                                         <C>           <C> 
Final 1996/97 of 9.80p per share on shares issued to
  acquire APV plc ..................................             3.0            --
Final 1995/96 of 8.87p per share on shares issued to
  acquire Unitech plc ..............................              --           3.9
Interim ............................................            27.2          23.1
                                                                ----          ----
                                                                30.2          27.0
                                                                ----          ----
</TABLE>

        An interim dividend of 5.40p per share net (1996 4.90p per share net)
will be payable on 8 April 1998 to shareholders on the Register at the close of
business on 13 March 1998.

        A final 1996/97 dividend of 9.80p per share net was paid on 6 October
1997 to shareholders on the Register at close of business on 15 August 1997.

4  EARNINGS PER SHARE

        The earnings per share on a net basis have been calculated using 493.6
million shares (30 September, 1996 466.2 million, 1997 year 469.5 million),
being the weighted average number of shares in issue during the period, and the
profit after taxation and minority interests of (pound)136.9 million (30
September, 1996 (pound)112.1 million, 1997 year (pound)253.8 million).

5  CASH FLOW STATEMENT

Reconciliation of operating profit to net cash flow from operating activities


<TABLE>
<CAPTION>
                                                   SIX MONTHS     SIX MONTHS
                                                      ENDED          ENDED
                                                 30 SEPTEMBER    30 SEPTEMBER
                                                     1997            1996
                                                     -----           -----
                                                   (POUND)M        (POUND)M
<S>                                              <C>             <C>  
Operating profit ........................            251.4           216.0
Depreciation charges ....................             88.8            75.1
(Increase)/decrease in stocks ...........            (17.2)           15.7
Decrease/(increase) in debtors ..........              5.3           (37.2)
Decrease in creditors and provisions ....           (102.0)          (77.3)
                                                     -----           -----
NET CASH INFLOW FROM OPERATING ACTIVITIES            226.3           192.3
                                                     -----           -----
</TABLE>


                                      F-40


<PAGE>   41
UNAUDITED NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)


5  CASH FLOW STATEMENT CONTINUED

Reconciliation of net cash flow to movement in net debt


<TABLE>
<CAPTION>
                                                                       SIX MONTHS       SIX MONTHS
                                                                          ENDED           ENDED
                                                                      30 SEPTEMBER     30 SEPTEMBER
                                                                           1997           1996
                                                                          -----           -----
                                                                        (POUND)M        (POUND)M
<S>                                                                   <C>              <C>   
Increase/(decrease) in cash in the period ....................             57.6           (19.5)
Cash inflow from increase in debt and lease financing ........            (66.9)          (41.7)
Cash (inflow)/outflow from (decrease)/increase in liquid
  resources ..................................................             (6.7)           (6.9)
                                                                          -----           -----
Change in net debt resulting from cash flows .................            (16.0)          (68.1)
Loans and finance leases acquired with subsidiary undertakings            (82.0)          (78.4)
New finance leases ...........................................             (0.5)           (1.5)
Translation differences ......................................             (6.1)            6.1
                                                                          -----           -----
Movement in net debt in period ...............................           (104.6)         (141.9)
Net debt at start of period ..................................           (564.4)         (432.3)
                                                                          -----           -----
NET DEBT AT END OF PERIOD ....................................           (669.0)         (574.2)
                                                                          -----           -----
</TABLE>

Analysis of changes to net debt

<TABLE>
<CAPTION>
                                                  ACQUISITIONS   
                                                  (EXCLUDING     OTHER     
                             5 APRIL     CASH      CASH AND     NON-CASH   EXCHANGE   30 SEPTEMBER    
                               1997      FLOW     OVERDRAFTS)   CHANGES*   MOVEMENT      1997
                            -------     -------     -------     -------     -------     -------
                           (POUND)M    (POUND)M    (POUND)M    (POUND)M    (POUND)M    (POUND)M
<S>                        <C>         <C>        <C>          <C>         <C>        <C>
Cash at bank and in hand       88.4        44.5          -           -         (1.0)      131.9
Overdrafts                    (23.4)       13.1          -           -            -       (10.3)
                                           57.6

Debt due within 1 year        (46.7)       39.9       (21.5)         -          1.0       (27.3)
Debt due after 1 year        (681.1)     (110.7)      (57.6)         -         (9.1)     (858.5)
Finance leases                (24.0)        3.9        (2.9)       (0.5)        0.3       (23.2)
                                          (66.9)

Short-term deposits           122.4        (6.7)         -           -          2.7       118.4
                                           (6.7)
                            -------     -------     -------     -------     -------     -------
NET DEBT                     (564.4)      (16.0)      (82.0)       (0.5)       (6.1)     (669.0)
                            -------     -------     -------     -------     -------     -------

Cash at bank and in hand       88.4                                                       131.9
Short-term deposits           122.4                                                       118.4
                            -------                                                     -------
Cash and deposits             210.8                                                       250.3
                            -------                                                     -------
</TABLE>

*   Other non-cash changes comprise new finance leases


                                      F-41


<PAGE>   42
  UNAUDITED NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)


Reconciliation of net cash flow from operating activities to net surplus cash
flow before tax and dividends


<TABLE>
<CAPTION>
                                                       SIX MONTHS       SIX MONTHS
                                                          ENDED           ENDED
                                                      30 SEPTEMBER     30 SEPTEMBER
                                                           1997            1996
                                                          -----           -----
                                                        (POUND)M         (POUND)M
<S>                                                   <C>              <C>   
NET CASH INFLOW FROM OPERATING ACTIVITIES ........        226.3           192.3
Net interest paid ................................        (32.9)          (28.2)
Tangible and intangible fixed assets acquired ....       (127.0)         (107.1)
Finance leases undertaken ........................         (0.5)           (1.5)
Tangible and intangible fixed assets sold ........         17.3            15.1
                                                         ------          ------
NET SURPLUS CASH FLOW BEFORE TAX AND DIVIDENDS ...         83.2            70.6
                                                         ------          ------
</TABLE>





                                      F-42




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