WATERLINK INC
8-K, 1998-04-09
MISC INDUSTRIAL & COMMERCIAL MACHINERY & EQUIPMENT
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549



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



                                    FORM 8-K


                                 CURRENT REPORT


                       PURSUANT TO SECTION 13 OR 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934


        Date of Report (Date of Earliest Event Reported): March 25, 1998



                                 WATERLINK, INC.
              (Exact Name of Registrant as Specified in Charter)

    Delaware                       1-13041                34-1788678
(State or Other               (Commission File    (IRS Employer Identification
 Jurisdiction of                   Number)                   No.)
 Incorporation)

4100 Holiday Street, N.W., Suite 201, Canton, Ohio         44718
(Address of Principal Executive Offices)                 (Zip Code)

       Registrant's telephone number, including area code: (330) 649-4000.



<PAGE>   2

Item 2.          Acquisition or Disposition of Assets

                (a) On March 25, 1998 (the "Closing Date"), Waterlink, Inc. (the
        "Company") acquired all the outstanding shares of capital stock of (i)
        Aquafine Engineering Services Limited, a corporation organized under the
        laws of England and Wales ("AES"), from its shareholder, Anglian Water
        Services Limited, a corporation organized under the laws of England and
        Wales, and (ii) Purac Engineering Incorporated, a corporation organized
        under the laws of Delaware ("Purac"), from its shareholder, Anglian
        Water, Inc., a corporation organized under the laws of Delaware, in a
        single transaction, for an aggregate consideration consisting of Four
        Million Five Hundred Thousand English Pounds (4,500,000 Pounds)
        (approximately US $7,571,700), which includes Three Hundred Twenty-five
        Thousand English Pounds (325,000 Pounds) (approximately US $546,845)
        for real property associated with AES, in cash paid at the closing. The
        Company effectuated the purchase of AES through a wholly owned
        subsidiary, Waterlink (UK) Limited, a corporation organized under the
        laws of England and Wales.

                The purchase price for the acquisition was established by the
        parties based on arms'-length negotiations. The Company used a
        combination of working capital and bank borrowing under its existing
        credit facility with Bank of America National Trust & Savings
        Association to fund the cash paid at closing.

                (b) The Company is an international provider of integrated water
        purification and wastewater treatment solutions, principally to
        industrial and municipal customers. AES designs and manufactures
        industrial and municipal water and wastewater systems and solutions
        primarily for the United Kingdom market. Purac designs water and
        wastewater systems primarily for the United States municipal market. The
        Company intends to devote the assets of AES and Purac to these same 
        purposes.

Item 7.         Financial Statements, Pro Forma Financial Information and
                Exhibits.

                (a) and (b) The financial statements required by this Item will
        be filed by amendment to this Form 8-K on or prior to June 8, 1998.

Item 7(c).      Exhibits.

        2.01-   Agreement for the Sale and Purchase of the Entire Issued Share
                Capital of Aquafine Engineering Services Limited and Purac
                Engineering Incorporated dated March 25, 1998 among Anglian
                Water Services Limited, Anglian Water, Inc., Anglian Water
                International Limited, Waterlink (UK) Limited and Waterlink, 
                Inc.

<PAGE>   3


        *99.01- Unaudited Pro Forma Condensed Consolidated Financial Data of
                Waterlink, Inc. and Subsidiaries.

        *99.02- Combined Financial Statements of Aquafine Engineering Services
                Limited and Purac Engineering Incorporated.

* TO BE FILED BY AMENDMENT


                                   SIGNATURES


         Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                                  WATERLINK, INC.

Dated:  April 9, 1998            By /s/ Michael J. Vantusko
                                    -------------------------------------------
                                    Michael J. Vantusko, Chief Financial Officer


<PAGE>   4


                                INDEX TO EXHIBITS
                                -----------------

                                    FORM 8-K


<TABLE>
<CAPTION>
EXHIBIT NUMBER                          DESCRIPTION
- --------------                          -----------



<S>                 <C>
2.01-               Agreement for the Sale and Purchase of the Entire Issued
                    Share Capital of Aquafine Engineering Services Limited and
                    Purac Engineering Incorporated dated March 25, 1998 among
                    Anglian Water Services Limited, Anglian Water, Inc., Anglian
                    Water International Limited, Waterlink (UK) Limited and 
                    Waterlink, Inc.

*99.01-             Unaudited Pro Forma Condensed Consolidated Financial Data of
                    Waterlink, Inc. and Subsidiaries.

*99.02-             Combined Financial Statements of Aquafine Engineering
                    Services Limited and Purac Engineering Incorporated.

</TABLE>


* TO BE FILED BY AMENDMENT




<PAGE>   1
                                                                    Exhibit 2.01

                   DATED                                 1998
                   ------------------------------------------



                        ANGLIAN WATER SERVICES LIMITED(1)

                                       and

                             ANGLIAN WATER, INC.(2)

                                       and

                     ANGLIAN WATER INTERNATIONAL LIMITED(3)

                                       and

                            WATERLINK (UK) LIMITED(4)

                                       and

                                WATERLINK INC(5)


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

                     AGREEMENT FOR THE SALE AND PURCHASE OF
                       THE ENTIRE ISSUED SHARE CAPITAL OF
                      AQUAFINE ENGINEERING SERVICES LIMITED
                           AND PURAC ENGINEERING, INC.
                 ----------------------------------------------





                           REYNOLDS PORTER CHAMBERLAIN
                                Chichester House
                              278/282 High Holborn
                                 London WCLV 7HA
                              Ref: NCC/TRA/ANG.18-1




<PAGE>   2



                                    CONTENTS

CLAUSE

1.       Interpretation
2.       Sale and purchase
3.       Completion
4.       Warranties
5.       Limitations on the Sellers' liability
6.       Confidential Information
7.       Indemnity and Undertakings
8.       Capacity and Authority of the Parties
9.       Further undertakings by the Sellers
10.      Pensions
11.      Guarantees
12.      Announcements
13.      Competition
14.      Costs
15.      General
16.      Assignment
17.      Notices
18.      Governing law and jurisdiction
19.      Counterparts


SCHEDULE

1 .      Information about AES and PEI
2.       Items for delivery by the Sellers at Completion
3.       Warranties in respect of AES and PEI
4.       Guaranteed Contracts
5.       Pension arrangements
6.       Registered Intellectual Property Rights
7.       Tax Indemnity
8.       PEI contracts excluded from warranty


                                        2

<PAGE>   3



AGREED FORM DOCUMENTS

1.       Letter of Credit for $750,000
2.       Property Agreement
3.       Assignment of debts
4.       Asset Transfer and Novation Agreement



                                        3

<PAGE>   4



THIS AGREEMENT is made on                             1998


BETWEEN:

(1)      ANGLIAN WATER SERVICES LIMITED, a company incorporated in England and
         Wales (registered no. 2366656), whose registered office is at Anglian
         House, Ambury Road, Huntingdon, Cambridgeshire, PE18 6NZ, England (the
         "AES SELLER");

(2)      ANGLIAN WATER, INC, a company incorporated in the state of Delaware,
         USA, whose principal office is at 10054 Old Grove Road, San Diego, CA
         92131, USA (the "PEI SELLER")

(3)      ANGLIAN WATER INTERNATIONAL LIMITED, a company incorporated in England
         and Wales (registered no. 2729389), whose registered office is at
         Anglian House, Ambury Road, Huntingdon, Cambridgeshire, PE18 6NZ,
         England (the "SELLER GUARANTOR");

(4)      WATERLINK (UK) LIMITED, a company incorporated in England and Wales
         (registered no. 3181974), whose registered office is at 54 Broad
         Street, Ludlow, Shropshire, SY8 1GP (the "AES BUYER"); and

(5)      WATERLINK, INC, a company incorporated in the state of Delaware, USA,
         whose principal office is at 4100 Holiday Street, NW Canton, Ohio
         44718-2532, USA (the "PEI BUYER").


THE PARTIES AGREE as follows:


                                        4

<PAGE>   5



1.       INTERPRETATION

1.1      In this Agreement:

         "Accounts" means AES's individual accounts (as that term is used in
         Section 226 of the Act) for the financial year ended on the Last
         Accounting Date, the auditors' report on those accounts and the
         directors' report for that year;

         "Act" means the Companies Act 1985;

         "AES" means Aquafine Engineering Services Limited, a company
         incorporated in England and Wales (registered number 2387229), whose
         registered office is at Anglian House, Ambury Road, Huntingdon,
         Cambridgeshire, PE18 6NZ, England;

         "Business Day" means a day other than Saturday or Sunday or public
         holiday in England and Wales;

         "Buyers" means the AES Buyer and the PEI Buyer and any reference to the
         relevant Buyer shall be to either the AES Buyer or the PEI Buyer as the
         context implies;

         "Buyers' Group Company" means the AES Buyer or the PEI Buyer, a
         subsidiary or holding company for the time being of the AES Buyer or
         the PEI Buyer or a subsidiary for the time being of a holding company
         of the AES Buyer or the PEI Buyer and includes, for the avoidance of
         doubt, following Completion AES and PEI;

         "Buyers' Attorneys" means Benesch, Friedlander, Coplan & Aronoff LLP,
         2300 BP America Building, 200 Public Square, Cleveland, Ohio, USA;

         "Completion" means completion of the sale and purchase of the Shares
         and the PEI Shares in accordance with this Agreement;

         "Confidential Information" means all information not publicly known
         used in or otherwise relating to AES's or PEI's business, customers or
         financial affairs;

         "Disclosure Letter" means the letter from the AES Seller given on its
         own behalf and on behalf of the PEI Seller to the AES Buyer and the PEI
         Buyer in relation to the Warranties having the same date as this
         Agreement together with any documents annexed thereto;

         "Encumbrance" means a mortgage, charge, pledge, lien, option,
         restriction, right of first refusal, right of pre-emption, third-party
         right or interest, other encumbrance or security interest of any kind,
         or another type of preferential arrangement (including, without
         limitation, a title transfer and retention arrangement) having similar
         effect;


                                        5

<PAGE>   6



         "INTELLECTUAL PROPERTY" means:

         (a)      patents, trade marks, service marks, registered designs,
                  applications for any of those rights, trade and business
                  names, unregistered trade marks and service marks, copyrights,
                  know-how, rights in designs and inventions;

         (b)      rights under licences, consents, orders, statutes or otherwise
                  in relation to a right in paragraph (a); and

         (c)      rights of the same or similar effect or nature as or to those
                  in paragraphs (a) and (b),

         in each case in any jurisdiction;

         "INTELLECTUAL PROPERTY RIGHTS" means all Intellectual Property used, or
         required to be used, by AES in, or in connection with, its business;

         "LAST ACCOUNTING DATE" means 31 March 1997;

         "MANAGEMENT ACCOUNTS" means ABS's unaudited profit and loss account for
         the period starting on the day after the Last Accounting Date and
         ending on, and AES's unaudited balance sheet as at, 31 December 1997
         and AES's unaudited monthly financial summary for the period from that
         date until 28 February 1998;

         "PEI" means Purac Engineering, Inc., a corporation incorporated under
         the laws of the state of Delaware, USA, having its principal office at
         4550 New Linden Hill Road, Suite 500, Wilmington, DE 19808;

         "PEI ACCOUNTS" means the unaudited balance sheet and profit and loss
         account of PEI as at 31 December and 31 March 1997 and for the nine and
         twelve month periods then ended, together with the supporting
         information included in the Sellers' group statutory accounts pack and
         the unaudited monthly financial summary of PEI as at and for the 11
         months ended 28 February 1998;

         "PEI SHARES" means 210 shares of capital stock, without par value, of
         PEI, comprising all the outstanding capital stock of PEI;

         "PERMIT" means a permit, licence, consent, approval, certificate and
         other authorisation, and a filing of a notification, report or
         assessment, necessary in any jurisdiction for the operation of AES's
         business, its ownership, possession, occupation or use of an asset Save
         for any Environmental Licence (as defined in paragraph 9 of Schedule
         3);


                                        6

<PAGE>   7



         "Property" means the property comprising the freehold and leasehold
         land at Kiln Lane, Ely, Cambridgeshire owned by the AES Seller and
         currently occupied by AES, details of which are set out in the Property
         Agreement;

         "Property Agreement" means the agreement between the AES Seller and the
         AES Buyer dated the same date as this Agreement in respect of the sale
         and purchase of the Property;

         "Relevant Claim" means a claim by the AES Buyer or the PEI Buyer
         involving or relating to a breach of a Warranty or under the Tax
         Indemnity;

         "Relevant Environmental Claim" means any Relevant Claim for breach of a
         Warranty contained in paragraph 9 of Schedule 3;

         "Relevant Non-Tax Claim" means any Relevant Claim other than a Relevant
         Tax Claim;

         "Relevant Non-Tax and Non-Environmental Claim" means any Relevant Claim
         other than a Relevant Tax Claim or a Relevant Environmental Claim;

         "Relevant Tax Claim" means any Relevant Claim for breach of a Tax
         Warranty or under the Tax Indemnity;

         "Pension Schemes" means means (i) the Anglian Water Miffor Image
         Pension Scheme as the same was established by an interim trust deed
         dated 31st August 1989 and made between Anglian Water Plc (1) and T
         Bolongaro, R A Brown, R M Dickinson, A K D Fox, P J P Gleeson, D R H
         Price and The Reverend L H Watson (2) and is currently governed by a
         Definitive Trust Deed and Rules dated 5th April 1994 and made between
         Anglian Water Plc (1) Anglian Water Services Limited, Anglian Water
         (Engineering and Business Systems) Limited and Anglian Water
         (Commercial Developments) Limited (2) and T Bolongaro, R A Brown, R M
         Dickinson, A K D Fox, P J P Gleeson, D R H Price and The Reverend L H
         Watson (3); and (ii) the Anglian Water Pension Scheme as the same was
         established by an interim trust deed dated 27th September 1988 and made
         between Anglian Water Plc (1) and A G Semple, P J P Gleeson, D R H
         Price, T Bolongaro, S Chaplin and H M Kellie (2) and is currently
         governed by a Definitive Trust Deed and Rules dated loth May 1991 and
         made between Anglian Water Plc (1) Anglian Water Services Limited,
         Anglian Water (Engineering and Business Systems) Limited and Anglian
         Water (Commercial Developments) Limited (2) and A G Semple, P J P
         Gleeson, D R H Price, T Bolongaro, S Chaplin and H M Kellie (3) or
         either of them as the context requires;

         "Sellers" means the AES Seller and the PEI Seller and any reference to
         the relevant Seller shall be to either the AES Seller or the PEI Seller
         as the context implies;


                                        7

<PAGE>   8



         "Sellers' Group Company" means the AES Seller or the PEI Seller, a
         subsidiary or holding company for the time being of the AES Seller or
         the PEI Seller or a subsidiary for the time being of a holding company
         of the AES Seller or the PEI Seller;

         "Sellers' Solicitors" means Reynolds Porter Chamberlain of Chichester
         House, 278/282 High Holborn, London, WCIV 7HA;

         "Shares" means 2,300,002 fully-paid ordinary shares of il each of AES
         comprising the whole of the issued share capital of AES;

         "Sum Recovered" means an amount equal to the total of the amount
         recovered from the other person less all reasonable costs incurred by a
         Buyers' Group Company in recovering the amount from the person.

         "Tax" and "Taxation" mean any form of taxation, levy, duty, charge,
         contribution or impost of whatever nature (including any relation fine,
         penalty, surcharge or interest) imposed by a Tax Authority;

         "Tax Authority" and "Taxation Authority" mean any local, municipal,
         governmental, state, federal or other fiscal, revenue, customs or
         excise authority, body or official anywhere in the world including,
         without limitation, the Inland Revenue and HM Customs and Excise;

         "Taxes Act" means Income and Corporation Taxes Act 1988;

         "Tax Indemnity" means the indemnity contained in Schedule 7;

         "Tax Warranty" means any of the warranties contained in paragraph 6 of
         Schedule 3 Part 1 or paragraph 6 of Schedule 3 Part 2;

         "TCGA" means the Taxation of Chargeable Gains Act 1992;

         "VATA" means, in the United Kingdom, the Value Added Tax Act 1994 and,
         in a jurisdiction outside the United Kingdom, any equivalent
         legislation;

         "Warranty" means a warranty contained in Schedule 3 and "Warranties"
         means all those warranties.

1.2      In this Agreement, a reference to:

         1.2.1    a "subsidiary undertaking" or "parent undertaking" is to be
                  construed in accordance with Section 258 of the Act and a
                  "subsidiary" or "holding company" is to be construed in
                  accordance with Section 736 of the Act;


                                        8

<PAGE>   9



         1.2.2    a document in the "agreed form" is a reference to a document
                  in a form approved and for the purposes of identification
                  signed by or on behalf of each party;

         1.2.3    a statutory provision includes a reference to the statutory
                  provision as modified or reenacted or both from time to time
                  before the date of this Agreement and any subordinate
                  legislation made under the statutory provision before the date
                  of this Agreement;

         1.2.4    a person includes a reference to a body corporate, association
                  or partnership;

         1.2.5    a person includes a reference to that person's legal personal
                  representatives and successors; and

         1.2.6    a clause, paragraph or Schedule, unless the context otherwise
                  requires, is a reference to a clause or paragraph of or
                  Schedule to this Agreement.

1.3      The headings in this Agreement do not affect its interpretation.

1.4      A reference in clause 5 and Schedule 3 to a person's knowledge,
         information, belief or awareness is deemed to include knowledge,
         information, belief or awareness which the person would have if the
         person had made all usual and reasonable enquiries.

2.       SALE AND PURCHASE

2.1      The AES Seller with full title guarantee agrees to sell and the AES
         Buyer agrees to buy the Shares and the PEI Seller with full title
         guarantee agrees to sell and the PEI Buyer agrees to buy the PEI Shares
         and each right attaching to the Shares and the PEI Shares at or after
         the date of this Agreement, free of any Encumbrance.

2.2      The total purchase price of the Shares is(pound)3,575,000. The total
         purchase price of the PEI Shares is(pound)48,000.

3.       COMPLETION

3.1      Completion of the matters specified in this Agreement is conditional in
         all respects upon the completion of the Property Agreement, in so far
         as it relates to the freehold property.

3.2      The AES Seller and the AES Buyer shall use their respective reasonable
         endeavours to ensure that the condition contained in clause 3.1 is
         satisfied.

3.3      Completion shall take place at the office of the Sellers' Solicitors on
         the date of this Agreement.

3.4      At Completion the Sellers shall give to the Buyers each item specified
         in Schedule 2.

                                        9

<PAGE>   10



3.5      The Seller shall ensure that at Completion AES's directors hold a
         meeting of the board of directors of AES at which the directors:

         3.5.1    vote in favour of the registration of the Buyer or its
                  nominee(s) as member(s) of AES in respect of the Shares
                  (subject to the production of properly stamped transfers);

         3.5.2    change AES's registered office to a place nominated by the
                  Buyer;

         3.5.3    change AES's accounting reference date to 30 September;

         3.5.4    appoint persons nominated by the Buyer as directors, secretary
                  and auditors of AES with effect from the end of the meeting;

         3.5.5    resolve to enter into the asset transfer and novation
                  agreement in the agreed form; and

         3.5.6    revoke each existing mandate given by AES for the operation of
                  its bank accounts and pass the resolutions contained in new
                  mandate(s) giving authority to persons nominated by the AES
                  Buyer.

3.6      At Completion:

         3.6.1    the AES Buyer shall pay (pound)3,575,000 to the AES Seller or
                  as the AES Seller directs in writing by transfer of funds and
                  the PEI Buyer shall pay (pound)48,000 to the PEI Seller or as
                  the PEI Seller directs in writing by transfer of funds;

         3.6.2    the AES Buyer shall give the AES Seller the Property Agreement
                  in the agreed form executed by the AES Buyer and arrange for
                  payment to be made in accordance with the terms of that
                  contract to the AES Seller or as the AES Seller directs in
                  writing by transfer of funds;

         3.6.3    the PEI Buyer shall procure the repayment by PEI to Anglian
                  Water International Holdings Limited of (pound)552,000 in full
                  settlement of the outstanding sum owed of $925,000 together
                  with all accrued and unpaid interest thereon; and

         3.6.4    AES shall enter into the asset transfer and novation agreement
                  in the agreed form.

3.7      Without prejudice to their rights and obligations hereunder, the
         parties acknowledge that the business, profits and losses of AES and
         PEI have been operated for the account of AES Buyer and PEI Buyer,
         respectively, from and after the opening of business on March 15, 1998.


                                       10

<PAGE>   11



4.       WARRANTIES

4.1      The Sellers warrant to the Buyers that each Warranty is true at the
         date of this Agreement and acknowledge that the Buyers are entering
         into this Agreement in reliance on the Warranties.

4.2      The Buyers acknowledge that they have not relied on, or been induced to
         enter this Agreement by, any representation, warranty or undertaking
         other than those expressly set out in this Agreement. The Buyers are
         not entitled to make a claim against the Sellers in respect of any
         representation, warranty or undertaking arising out of, or in
         connection with, this Agreement unless the representation, warranty or
         undertaking is expressly set out in this Agreement.

4.3      The Warranties are qualified by reference to any matter or thing which
         is fairly disclosed in the Disclosure Letter.

4.4      The Buyers warrant to the Sellers that they have not at the date of
         this Agreement formulated an intention to make a Relevant Claim against
         the Sellers and based upon enquiry of Dr Hans F Larsson that they do
         not have actual knowledge of any breaches of the Warranties arising
         from the relationship between AES or PEI (as the case may be) and a
         Sellers' Group Company.

4.5      Each Warranty is to be construed independently and (except where this
         Agreement provides otherwise) is not limited by another provision of
         this Agreement or another Warranty.

4.6      If there is a breach of a Warranty and:

         4.6.1    the value of an asset of AES or PEI is or becomes less than
                  the value would have been had the breach not occurred; or

         4.6.2    AES or PEI is subject to or incurs a liability which it would
                  not have been subject to or would not have incurred had the
                  breach not occurred, the relevant Buyer shall be entitled to
                  claim, without prejudiced to its right to seek redress or
                  recover damages on any basis from time to time available to
                  it, an amount equal to either:

         4.6.3    the reduction in the value of the asset or, as the case may
                  be, the increase in the liability; or

         4.6.4    the reduction caused in the value of the Shares or the PEI
                  Shares (as the case may be) and for the avoidance of doubt
                  there shall be no right for the Buyer to recover an amount in
                  any circumstances calculated on the basis of a multiple of
                  such reduction;

         each on demand from the Seller.

                                       11

<PAGE>   12



5.       LIMITATIONS ON THE SELLERS' LIABILITY

5.1      Neither of the Sellers are liable in respect of a Relevant Non-Tax
         Claim unless the amount that would otherwise be recoverable from the
         relevant Seller (but for this clause 5. 1) in respect of that Relevant
         Non-Tax Claim exceeds (pound)1,000.

5.2      Neither of the Sellers are liable in respect of a Relevant Non-Tax and
         Non-Environmental Claim unless and until the amount that would
         otherwise be recoverable from the Sellers (but for this clause 5.2) in
         respect of that Relevant Non-Tax and Non-Environmental Claim, when
         aggregated with any other amount or amounts recoverable in respect of
         other Relevant Non-Tax and Non-Environmental Claims (excluding any
         amounts in respect of a Relevant Non-Tax Claim for which the Sellers
         have no liability because of clause 5.1), exceeds(pound)250,000 and in
         the event that the aggregated amounts exceed(pound)250,000 the Sellers
         are only liable for the excess.

5.3      Neither of the Sellers are liable in respect of a Relevant
         Environmental Claim unless and until the amount that would otherwise be
         recoverable from the Sellers (but for this clause 5.3) in respect of
         that Relevant Environmental Claim, when aggregated with any other
         amount or amounts recoverable in respect of other Relevant
         Environmental Claims (excluding any amounts in respect of a Relevant
         Non-Tax Claim for which the Sellers have no liability because of clause
         5.1), exceeds(pound)250,000 and in the event that the aggregated
         amounts exceed(pound)250,000 the Sellers are only liable for the
         excess.

5.4      The Sellers' total liability in respect of all Relevant Non-Tax Claims
         is limited to (pound)750,000 in aggregate save that their total
         liability in respect of all Relevant Environmental Claims shall be an
         additional (pound)750,000 in aggregate.

5.5      Neither of the Sellers are liable in respect of a Relevant Claim unless
         the relevant Buyer has given the relevant Seller written notice of the
         Relevant Claim (stating in reasonable detail the nature of the Relevant
         Claim and, if practicable, the amount claimed):

         5.5.1    on or before the seventh anniversary of Completion in respect
                  of a Relevant Tax Claim;

         5.5.2    on or before the second anniversary of Completion in respect
                  of a Relevant Environmental Claim;

         5.5.3    on or before the first anniversary of Completion in respect of
                  another Relevant Claim; and

         5.5.4    Notwithstanding the foregoing, there shall be no limitation as
                  to when a Relevant Claim may be brought with respect to the
                  warranty contained in paragraph 2 of

                                       12

<PAGE>   13



                  Schedule 3 Part 1 or paragraph 2 of Schedule 3 Part 2 and for
                  the avoidance of doubt the limitations set out in this
                  Agreement shall not apply to the Sellers covenants to sell
                  with full title guarantee.

5.6      A Relevant Non-Tax Claim notified in accordance with clause 5.5 and not
         satisfied, settled or withdrawn is unenforceable against the relevant
         Seller on the expiry of the period of twelve months starting on the day
         of notification of the Relevant Claim, unless proceedings in respect of
         the Relevant Claim have been issued and served on the relevant Seller.

5.7      Neither of the Sellers are liable in respect of a Relevant Non-Tax
         Claim:

         5.7.1    to the extent that the matter giving rise to the Relevant
                  Non-Tax Claim would not have arisen but for the passing of, or
                  a change in, after the date of this Agreement a law, rule,
                  regulation, interpretation of the law or administrative
                  practice of a government, governmental department, agency or
                  regulatory body or an increase in the Tax rates or an
                  imposition of Tax, in each case not actually or prospectively
                  in force at the date of this Agreement;

         5.7.2    to the extent that the matter giving rise to a Relevant
                  Non-Tax Claim relates to an amount for which AES or PEI (as
                  the case may be) has a right of recovery against, or an
                  indemnity from, a person other than a Sellers' Group Company,
                  whether under a provision of applicable law, insurance policy
                  or otherwise howsoever provided that if the relevant Buyer has
                  reasonable commercial grounds for wishing not to pursue such
                  right of recovery or indemnity the relevant Seller shall
                  nevertheless be liable in respect of such Relevant Non-Tax
                  Claim upon the assignment to the relevant Seller for no
                  consideration of the benefit of such right of recovery or
                  indemnity;

         5.7.3    if a Buyers' Group Company fails to act in accordance with
                  clause 5.11 in connection with the matter giving rise to the
                  Relevant Non-Tax Claim unless and to the extent that in the
                  absence of the failure the relevant Buyer would still have had
                  a Relevant Non-Tax Claim;

5.8      For the avoidance of doubt, limitations on the Sellers' liability in
         respect of Relevant Tax Claims are also contained in the Tax Indemnity:

         5.8.1    references to the AES Seller and the AES Buyer in the Tax
                  Indemnity shall be taken to be references to the PEI Seller
                  and the PEI Buyer and references to the Company to be
                  references to PEI where appropriate in relation to claims
                  under the Tax Warranties in respect of PEI; and

         5.8.2    where the provisions of this clause 5 in respect of Relevant
                  Tax Claims and the Tax Indemnity conflict; the Tax Indemnity
                  shall prevail.


                                       13

<PAGE>   14



5.9      The Buyers are not entitled to recover more than once in respect of any
         one matter giving rise to a Relevant Claim.

5.10     If in respect of any one matter a Relevant Claim may be made under the
         Warranties and under the Tax Indemnity:

         5.10.1   the Relevant Claim under the Tax Indemnity may not be made
                  before the Relevant Claim is made under the Warranties; and

         5.10.2   to the extent that the Buyers recover under the Warranties
                  they shall not be entitled to recover under the Tax Indemnity.

5.11     If a Buyers' Group Company becomes aware of a matter which might give
         rise to a Relevant Non-Tax Claim which is not likely to exceed
         (pound)200,000 in excess of the Sellers' total liability as provided
         for in clause 5.4:

         5.11.1   the relevant Buyer shall as soon as reasonably practicable
                  give written notice to the relevant Seller of the matter and
                  shall consult with the relevant Seller with respect to the
                  matter but the failure to do so shall not impair such Buyer's
                  rights unless such failure is actually materially prejudicial
                  to such Seller;

         5.11.2   the relevant Buyer shall, and shall ensure that each Buyers'
                  Group Company will, provide to the relevant Seller and its
                  advisers reasonable access to premises and personnel and to
                  relevant assets, documents and records within each Buyers'
                  Group Company's power or control for the purposes of
                  investigating the matter and enabling the relevant Seller to
                  take the action referred to in clause 5.11.4(a);

         5.11.3   the relevant Seller (at its cost) may take copies the
                  documents or records, and photograph the premises or assets,
                  referred to in clause 5.11.2, which copy documents, records,
                  and photographs shall be treated by such Seller as
                  confidential;

         5.11.4   the relevant Buyer shall and shall ensure that each Buyers'
                  Group Company will:

                  (a)      take any action and institute any proceedings, and
                           give any information and assistance, as the relevant
                           Seller may reasonably request to:

                           (i)      dispute, resist, appeal, compromise, defend,
                                    remedy or mitigate the matter provided that
                                    the relevant Buyer shall not be obliged to
                                    take any such action or institute such
                                    proceedings or to settle or procure the
                                    settlement of any matter which will have a
                                    future material adverse effect on AES or PEI
                                    without consent, such consent not to be
                                    unreasonably withheld and in the event that
                                    the action or proceedings requested to be
                                    taken by the relevant Seller are not against
                                    a Buyers'

                                       14

<PAGE>   15



                                    Group Company the right to withhold such
                                    consent shall be determined upon the
                                    reasonable judgement of the relevant Buyer;
                                    or

                                    (ii)    enforce against a person (other than
                                            a Sellers' Group Company) a Buyers'
                                            Group Company's rights in relation
                                            to the matter; and

                           (b)      in connection with proceedings related to
                                    the matter (other than against a Sellers'
                                    Group Company) use advisers nominated by the
                                    relevant Seller and, if such Seller
                                    requests, allow such Seller the exclusive
                                    conduct of the proceedings, and in each case
                                    on the basis that notwithstanding the
                                    provisions contained in clause 5.4 the
                                    relevant Seller shall fully indemnify each
                                    Buyers' Group Company for all reasonable
                                    losses, damages and costs incurred as a
                                    result of a request or nomination by such
                                    Seller;

         5.11.5   the relevant Buyer shall not, and shall ensure that no Buyers'
                  Group Company will, admit liability in respect of, or
                  compromise or settle, the matter without the prior written
                  consent of the relevant Seller (not to be unreasonably
                  withheld or delayed).

5.12     The Sellers are not liable in respect of a relevant claim to the extent
         that the working capital (ie the current assets less the current
         liabilities as shown in the unaudited balance sheet as at 31 December
         1997 for AES or PEI as the case may as shown in the Management Accounts
         or the PEI Accounts) is overstated.

5.13     If one of the Sellers pays to a Buyers' Group Company an amount in
         respect of a Relevant Non-Tax Claim and a Buyers' Group Company
         subsequently recovers from another person an amount which is referable
         to the matter giving rise to the Relevant Non-Tax Claim:

         5.13.1   if the amount paid by such Seller in respect of the Relevant
                  Non-Tax Claim is more than the Sum Recovered, the relevant
                  Buyer shall immediately pay to such Seller the Sum Recovered;
                  and

         5.13.2   if the amount paid by such Seller in respect of the Relevant
                  Claim is less than or equal to the Sum Recovered, the relevant
                  Buyer shall 'immediately pay to such Seller an amount equal to
                  the amount paid by such Seller.

5.14     Nothing in clause 5 or in the Tax Indemnity restricts or limits the
         Buyer's general obligation at law to mitigate any loss or damage which
         it may incur in consequence of a matter giving rise to a Relevant Claim
         and notwithstanding the provisions of clause 4.6 the Buyers will be
         deemed to be under a duty to mitigate any loss which they may seek to
         claim constitutes a breach of Warranty.


                                       15

<PAGE>   16



6.       CONFIDENTIAL INFORMATION

6.1      With effect from Completion the Sellers shall:

         6.1.1    not use or disclose to a person Confidential Information it 
                  has or acquires; and

         6.1.2    make every reasonable effort to prevent the use or disclosure
                  of Confidential Information by persons over which it has
                  influence.

6.2      Clause 6.1 does not apply to:

         6.2.1    disclosure of Confidential Information to a director, officer
                  or employee of the Buyer, AES or PEI whose function requires
                  him to have the Confidential Information;

         6.2.2    use or disclosure of Confidential Information required to be
                  used or disclosed by law or the London Stock Exchange Limited;

         6.2.3    disclosure of Confidential Information to an adviser for the
                  purpose of advising the Sellers but only on terms that clause
                  6.1 applies to use or disclosure by the adviser; or

         6.2.4    Confidential Information which becomes publicly known except
                  by the Sellers' breach of clause 6.l.

7.       INDEMNITY AND UNDERTAKINGS

7.1      The Sellers undertake that they will and will procure that each
         Sellers' Group Company will continue to support all existing bank
         guarantees and guarantees given directly by any Sellers' Group Company
         relating to the performance of those contracts as set out in Schedule 4
         to which AES or PEI is a party until such guarantees have expired.
         Notwithstanding the foregoing the PEI Buyer undertakes to provide or
         procure the provision of a $60,000 letter of credit to the landlord of
         the premises occupied by PEI within 2 months of Completion in order to
         release the relevant Sellers' Group Company from its obligations with
         respect thereto.

7.2      The AES Buyer shall indemnify and keep the AES Seller fully and
         effectively indemnified on demand against any and all losses, claims,
         damages, costs, charges, expenses, liabilities, demands, proceedings
         and actions which the AES Seller or any Sellers' Group Company may
         sustain or incur or which may be brought or established by any person
         arising out of or in relation to or by reason of the actions provided
         for in clause 7.1. Save that notwithstanding the indemnity set out in
         this clause 7.2 the AES Buyer shall nevertheless be entitled to the
         benefit of any Relevant Claim available to it.

                                       16

<PAGE>   17



7.3      The AES Seller shall be entitled to draw on the letter of credit for
         $750,000 (in the agreed form) drawn on Bank of America as a result of
         any claim that it has by virtue of the indemnity set out at clause 7.2.
         The aforementioned letter of credit may be reduced in value by the AES
         Buyer on a dollar for dollar basis (using the dollar/sterling exchange
         rate which would be reasonably available to the AES Seller for the
         purchase of dollars at the time of the reduction) to the extent that
         the guarantees set out in Schedule 4 and the guarantees and bonds set
         out in schedule 3.4(f) of the share purchase agreement between inter
         alia Waterlink (Sweden) AB and Anglian Water Holding GmbH concerning
         the acquisition of shares in inter alia Nordic Water Products AB dated
         4 March 1997 have in aggregate reduced in value to below $750,000.
         Before exercising their right to draw on the aforementioned letter of
         credit, the AES Seller undertakes to notify the AES Buyer of its
         intention to draw on such letter of credit. On request by the AES
         Seller, the AES Buyer undertakes to provide the AES Seller with
         information on the status of the relevant contracts and the guarantees
         given in respect of those contracts by the AES Seller or by a Sellers'
         Group Company and to assist the AES Seller in the recovery of the
         guarantees upon their expiry.

7.4      The AES Buyer undertakes to use all reasonable efforts not to and to
         ensure that each Buyers' Group Company ceases to use or make any
         references to the trade mark or corporate name Anglian Water in their
         operations as soon as possible and in no event as from six months after
         Completion. During this six month period, AES is entitled to continue
         to use the name Anglian Water in any literature or brochure existing at
         Completion. The AES Buyer hereby waives any rights whatsoever to the
         name "Anglian Water" or any derivatives thereof.

7.5      The PEI Buyer undertakes to use all reasonable efforts not to and to
         ensure that each Buyers' Group Company ceases to use or make any
         references to the corporate name Purac in their operations within
         twelve months after Completion. The PEI Buyer hereby waives any rights
         whatsoever to the name "Purac" or any derivatives thereof.

7.6      The AES Buyer undertakes to the AES Seller to ensure that the employees
         of AES at Completion shall be paid the bonuses that they are entitled
         to under the profit related pay scheme operated by AES immediately
         prior to Completion for the financial year ended 31 March 1998 and that
         none of such employees suffer any financial loss as a result of an
         increase in their personal tax liability upon the receipt of such bonus
         arising from the cessation of their right to participate in such scheme
         Provided that the liability of the AES Buyer in respect of its
         obligation to ensure that such employees do not suffer any increased
         personal tax liability shall not exceed(pound)8,000.

7.7      Immediately following Completion the AES Buyer undertakes to the AES
         Seller for the benefit of Anglian Water plc to pay (pound)6,801.38 to
         Anglian Water plc in consideration for which Anglian Water plc will
         enter into an assignment of debts (in the agreed form) in relation to
         amounts owed by employees of AES to Anglian Water plc which were loaned
         for the purchase of computer equipment.

                                       17

<PAGE>   18



7.8      The AES Seller shall indemnify and keep AES fully and effectively
         indemnified on demand against any and all losses, claims, damages,
         costs, charges, expenses, liabilities, demands, proceedings and actions
         which AES may sustain or incur or which may be brought or established
         by any person arising out of or in relation to or by reason of any
         claim for redundancy, termination or other severance payments and/or
         any allegation of a failure to consult pursuant to the Transfer of
         Undertakings (Protection of Employment) Regulations 1981 made by each
         of A Dunsire, M Mutch, J Bennet, D Stimson, J Williams, N Harper, W
         Milner, L Minns, P Jennings, M Hyde, J Denny, R Baring, P Gorham, D
         Thompson, G Browne and K Cooper who have previously been employed in
         the provision of services by AES under the sewerage maintenance
         contract to the AES Seller which was novated from AES to Alpheus
         Environmental Services Limited and to which company the said employees
         have agreed to be transferred prior to Completion.

7.9      The AES Seller shall indemnify and keep AES fully and effectively
         indemnified on demand against any and all losses, claims, damages,
         costs, charges, expenses, liabilities, demands, proceedings and actions
         which AES may sustain or incur or which may be brought or established
         by R Cornwall who has previously been employed in the provision of
         services for AES arising out of or in relation to or by reason of any
         claim he may have against AES for unfair dismissal, wrongful dismissal
         or redundancy.

7.10     The PEI Seller shall pay all costs and expenses, including, without
         limitation, payments in respect of any severance arrangement, (but not
         for the avoidance of doubt any ex gratia payments or contractual
         payments in excess of those provided for under the contract of
         employment existing at the date of Completion) arising from the
         termination of Tony Nardozzi's employment by PEI, and shall indemnify
         and keep the PEI Buyer (and PEI after Completion) fully and effectively
         indemnified on demand against any and all losses, claims, damages,
         costs, charges, liabilities, demands, proceedings and actions which the
         PEI Buyer or PEI (after Completion) may sustain or incur by reason of
         said termination of employment Provided that the said termination shall
         occur within 6 months of the date of this Agreement.

7.11     The PEI Buyer shall pay all costs and expenses, including, without
         limitation, payments in respect of any severance arrangement, arising
         from the termination of Tony Nardozzi's employment more than 6 months
         after the date of this Agreement or from the termination of Ron
         Hartman's or Andy Lupfer's employment by PEI at any time, and shall
         indemnify and keep the PEI Seller and each Sellers' Group Company fully
         and effectively indemnified on demand against any and all losses,
         claims, damages, costs, charges, liabilities, demands, proceedings and
         actions which the PEI Seller or any Sellers' Group Company may sustain
         or incur by reason of said terminations of employment.

7.12     The indemnity in terms of Schedule 7 shall apply in relation to Tax.

7.13     The AES Seller undertakes to procure that the payroll facilities for
         the payment of the employees of AES is made available to the AES Buyer
         for April and May 1998 at the same

                                       18

<PAGE>   19



         charge that AES has paid prior to Completion and the AES Buyer
         undertakes to reimburse in full on demand the amount which is paid to
         such employees (including for the avoidance of doubt an apportionment
         of sums that have already been paid to such employees in respect of the
         period commencing on Completion) together with the relevant charge.

8.       CAPACITY AND AUTHORITY OF THE PARTIES

8.1      Each of the parties to this Agreement undertakes that it the right,
         power and authority and has taken all action necessary to execute and
         deliver, and to exercise its rights and perform its obligations under,
         this Agreement and each document to be executed at or before
         Completion.

8.2      Each of the parties to this Agreement undertakes that its obligations
         under this Agreement and each document to be executed at or before
         Completion are, or when the relevant document is executed will be,
         enforceable in accordance with their terms.

9.       FURTHER UNDERTAKINGS BY THE SELLERS

9.1      For 2 years starting on the date of this Agreement:

         9.1.1    the AES Seller shall not compete directly or indirectly with
                  AES within the UK in respect of AES' current activities of:

                  (a)      the manufacture, sale, supply, distribution,
                           installation and service of the existing product
                           range as at Completion or enhancement of such
                           existing products; or

                  (b)      the sale, supply, distribution and installation of
                           NWP Lamellas or Dynasand filters;

                  except where the AES Seller undertakes contracts for design
                  and construction of Water, Wastewater, Sludge and other
                  Treatment plants incorporating these or similar products. For
                  the avoidance of doubt the restrictions set out in this clause
                  9.1.1 do not restrict the AES Seller from continuing its
                  current activities, nor the continued development and
                  exploitation of products where AES has non exclusive territory
                  licences with any Sellers' Group Company;

         9.1.2    The PEI Seller shall not compete directly or indirectly with
                  PEI within the USA in respect of PEI's current activities of
                  direct sale, supply, distribution, installation and service of
                  Flofilters, GEWE Lamellas and hydraulic scrapers except where
                  the AES Seller undertakes the design construction of Water,
                  Wastewater, Sludge and other Treatment plants incorporating
                  these or similar products. For the avoidance of doubt the
                  restrictions set out in this clause 9.1.2 do not restrict the
                  PEI Seller from

                                       19

<PAGE>   20



                  extending its current activities in the Design and Construct
                  markets to include the USA, the continued exploitation of
                  Kaldnes where PEI will have a non exclusive licence, or other
                  products and processes that the PEI Seller is developing such
                  as the Lamella - DAF process currently being trialed in the
                  USA.

9.2      For 3 years starting on the date of this Agreement the Sellers shall
         not directly or indirectly:

         9.2.1    engage, employ or solicit an employee of AES or PEI; or

         9.2.2    do or say anything which is harmful to the reputation of AES
                  or PEI which may lead a person to cease to deal with AES or
                  PEI on substantially equivalent terms to those previously
                  offered or at all.

9.3      Each restriction in clauses 9.1 and 9.2 constitutes an entirely
         independent restriction on the relevant Seller.

9.4      The Sellers shall ensure that each Sellers' Group Company complies with
         clauses 9.1 and 9.2 subject to the exceptions set out in those clauses
         which are deemed to apply to each Sellers' Group Company.

9.5      The Sellers hereby acknowledge that damages would be an inadequate
         remedy for a breach of clauses 9.1 and 9.2 and agree that the Buyers
         should be entitled to an injunction for a threatened or actual breach.

9.6      On receiving the Buyer's reasonable request the Sellers shall (at their
         cost):

         9.6.1    do and execute, or arrange for the doing and executing of,
                  each act, document and thing necessary to implement this
                  Agreement; and

         9.6.2    give to the Buyers all information in its possession or to
                  which they have access relating to the business of AES or PEI
                  and allow the Buyers to copy any document containing that
                  information.

9.7      Notwithstanding the provisions of clause 9.1.1 the restrictions
         contained within that clause shall not prevent prohibit the holding of
         not more than 5% of the total issued shares or securities in a company
         which are quoted on any recognised investment exchange (as defined by
         section 201 of the Financial Services Act 1986).

10.      PENSIONS

         The AES Seller and the AES Buyer shall implement the pension
         arrangements in Schedule 5.


                                       20

<PAGE>   21



11.      GUARANTEES

11.1     In consideration of the PEI Buyer entering into this Agreement the
         Seller Guarantor guarantees to the PEI Buyer the due and punctual
         performance by the PEI Seller of all its obligations under this
         Agreement.

11.2     In consideration of the Sellers entering into this Agreement, the PEI
         Buyer guarantees to the Sellers the due and punctual performance by the
         AES Buyer of all its obligations under this Agreement.

11.3     The liability of the PEI Buyer and the Seller Guarantor respectively
         hereunder shall not be affected, impaired or discharged by reason of
         any act, omission, matter or thing which but for this provision might
         operate to release or otherwise exonerate them from their obligations
         under this Agreement including without limitation any time or other
         indulgence granted by the Buyers to the Sellers or vice versa.

12.      ANNOUNCEMENTS

12.1     Subject to clause 12.2, neither party may, before or after Completion,
         make or send a public announcement, communication or circular
         concerning the transactions referred to in this Agreement unless it has
         first obtained the other party's written consent, which may not be
         unreasonably withheld or delayed.

12.2     Clause 12.1 does not apply to a public announcement, communication or
         circular:

         12.2.1   required by law or a regulation of a stock exchange, if the
                  party required to make or send it has, if practicable, first
                  consulted and taken into account the reasonable requirements
                  of the other party; or

         12.2.2   made or sent by the Buyers after Completion to a customer,
                  client or supplier of AES or PEI informing it of the Buyers'
                  purchase of the Shares and the PEI Shares.

13.      COMPETITION

         No provision of this Agreement, or of an agreement or arrangement of
         which it forms part, by virtue of which this Agreement, or an agreement
         or arrangement of which it forms part, is subject to registration under
         the Restrictive Trade Practices Acts 1976 and 1977, takes effect until
         the day after the date on which particulars have been furnished to the
         Director General of Fair Trading in accordance with those Acts.


                                       21

<PAGE>   22



14.      COSTS

         Except where this Agreement provides otherwise, each party shall pay
         its own costs relating to the negotiation, preparation, execution and
         performance by it of this Agreement and of each document referred to in
         it.

15.      GENERAL

15.1     A variation of this Agreement is valid only if it is in writing and
         signed by or on behalf of each party.

15.2     The failure to exercise or delay in exercising a right or remedy
         provided by this Agreement or by law does not constitute a waiver of
         the right or remedy or a waiver of other rights or remedies. No single
         or partial exercise of a right or remedy provided by this Agreement or
         by law prevents further exercise of the right or remedy or the exercise
         of another right or remedy.

15.3     The Buyer's rights and remedies contained in this Agreement are
         cumulative and not exclusive of rights or remedies provided by law.

15.4     Except to the extent that they have been performed and except where
         this Agreement provides otherwise, the Warranties, indemnities and
         obligations contained in this Agreement remain in force after
         Completion.

16.      ASSIGNMENT

         A party may not assign or transfer or purport to assign or transfer a
         right or obligation under this Agreement except that the benefit of a
         Warranty may be assigned or transferred in whole or in part and without
         restriction between the Buyers and the lender of any Buyers' Group
         Company subject to any defence available to the Sellers hereunder,
         which assignment shall be in a form and substance reasonably
         satisfactory to the Sellers.

17.      NOTICES

17.1     A notice or other communication under or in connection with this
         Agreement shall be in writing and shall be delivered personally or sent
         by first class post pre-paid recorded delivery (or air mail if
         overseas) or by fax to the party due to receive the notice or
         communication, at its address set out in this Agreement or another
         address specified by that party by written notice to the others. The
         parties to this Agreement shall use their reasonable endeavours to
         ensure that any notice to the Sellers shall be copied to the Seller
         Guarantor and any notice to the AES Buyer shall be copied to the PEI
         Buyer.


                                       22

<PAGE>   23



17.2     In the absence of evidence of earlier receipt, a notice or other
         communication is deemed given:

         17.2.1   if delivered personally, when left at the address referred to
                  in clause 17.1;

         17.2.2   if sent by mail except air mail, two days after posting it;

         17.2.3   if sent by air mail, six days after posting it; and

         17.2.4   if sent by fax, on completion of its transmission.

18.      GOVERNING LAW AND JURISDICTION

18.1     This Agreement is governed by English law.

18.2     The courts of England have exclusive jurisdiction to hear and decide
         any suit, action or proceedings, and to settle any disputes, which may
         arise out of or in connection with this Agreement (respectively,
         "Proceedings" and "Disputes") and, for these purposes, each party
         irrevocably submits to the jurisdiction of the courts of England.

18.3     Each party irrevocably waives any objection which it might at any time
         have to the courts of England being nominated as the forum to hear and
         decide any Proceedings and to settle any Disputes and agrees not to
         claim that the courts of England are not a convenient or appropriate
         forum.

18.4     Process by which any Proceedings are begun in England may be served on
         the Buyers' Attorneys or their agents at the following address in the
         United Kingdom, Messrs Edge & Ellison of Rutland House, 148 Edmund
         Street, Birmingham, B3 2JR, by being delivered in accordance with
         clause 17. Nothing contained in clause 18.4 affects the right to serve
         process in another manner permitted by law.

19.      COUNTERPARTS

         This Agreement may be executed in any number of counterparts each of
         which when executed and delivered is an original, but all the
         counterparts together constitute the same document.



                                       23

<PAGE>   24



                                   SCHEDULE 1

<TABLE>
<CAPTION>

PART 1 - INFORMATION ABOUT AES

<S>       <C>                                <C>    
1.        Registered number:                 2387229

2.        Date of incorporation:             22 May 1989

3.        Place of incorporation:            England and Wales

4.        Address of registered office:      Anglian House, Ambury Road, Huntingdon,
                                             Cambridgeshire, PE18 6NZ

5.        Type of company:                   Private Limited

6.        Authorised share capital:          (pound)2,500,000 divided into 2,500,000 Ordinary
                                             Shares of (pound)1 each

7.        Issued share capital:              (pound)2,300,002 divided into 2,300,002 Ordinary
                                             Shares of (pound)1 each

8.        Directors:                         Timothy John Pettifer of Treetops, 47 Caxton
                                             End, Eltisley, Huntingdon, Cambridgeshire
                                             and Edward Wilson of 29 West End, West
                                             Haddon, Northamptonshire, NN6 6AY

9.        Secretary:                         Jacqueline Elizabeth Fox of Little Dormers, 3
                                             Wicken Road, Newport, Essex, CB11 3QD

10.       Accounting reference date:         31 March

11.       Auditors:                          Price Waterhouse of Cornwall Court, 19
                                             Cornwall Street, Birmingham B3 2DT

12.       Tax residence:                     UK

13.       VAT registration no.:              514060002 (group registration)
</TABLE>


                                       24

<PAGE>   25


<TABLE>

<S>       <C>                                <C>
14.       Bank accounts:                     Barclays Bank plc of 1 Market Hill,             
                                             Huntingdon, Cambridgeshire PE18 6AE

                                             Account No: 60011045

                                             Sort Code: 20-43-63

15.       Charges:                           None
</TABLE>


                                       25

<PAGE>   26


<TABLE>
<CAPTION>

PART 2 - INFORMATION ABOUT PEI


<S>       <C>                                <C> 
1.        Date of incorporation:             11 July 1984

2.        Place of incorporation:            Delaware

3.        Place of principal office:         4550 New Linden Hill Road, Suite 500,
                                             Wilmington, DE 19808

4.        Type of company:                   Corporation

5.        Authorised share capital:          300 shares, without par value

6.        Issued share capital:              210 shares

7.        Directors:                         Tony Nardozzi
                                             Andy Nield
                                             Harry Rowlands
                                             John Green

8.        Secretary:                         Andy Lupfer

9.        Fiscal year:                       31 March

10.       Auditors:                          Price Waterhouse

11.       Tax residence:                     United States

12.       Charges:                           None
</TABLE>




                                       26

<PAGE>   27



                                   SCHEDULE 2

                 ITEMS FOR DELIVERY BY THE SELLERS AT COMPLETION

1.       Executed transfer(s) in respect of the Shares and the PEI Shares to the
         AES Buyer and the PEI Buyer or their nominee(s) and the share
         certificate(s) for the Shares and the PEI Shares.

2.       The common seals (if any) of AES and PEI and each register, minute
         book and other book required to be kept by AES under the Act or by PEI
         under applicable law made up to the date of Completion, each
         certificate of incorporation and certificate of incorporation on change
         of name for AES and a copy of the certificate of incorporation of PEI
         and all amendments thereto, certified as of a recent date by the
         Secretary of State of the State of Delaware.

3.       The Property Agreement in the agreed form executed by the AES Seller.

4.       A copy of a letter to AES from their auditors resigning their office
         with effect from Completion containing the statement referred to in
         Section 394 of the Act, the original of the letter having been
         deposited at the registered office of the relevant company.

5.       A letter executed as a deed in the form required by the Buyers from
         each present director and secretary of AES and from each present office
         and director of PEI (other than any such individuals whom the Buyers
         request to remain in office) in each case resigning their respective
         office (with effect from the end of the meeting held pursuant to clause
         3.5) and acknowledging that the writer has no claim against AES for
         compensation for loss of office or otherwise.

6.       The Management Accounts.

7.       Written confirmation from the AES Seller that debts and accounts
         between AES and PEI on the one hand and any Sellers' Group Company on
         the other hand have been fully paid.

8.       Written confirmation from each of the AES Seller and AW Licensing
         Limited that the change of control clause at clause 11.2 of each
         respective licence agreement referred to at items 1 and 2 of Schedule 6
         will not apply in respect of the sale of the Shares under the terms of
         this Agreement.



                                       27

<PAGE>   28



                                   SCHEDULE 3


PART 1 - WARRANTIES IN RESPECT OF AES

1.       INFORMATION

         The information set out in this Agreement is accurate and not
         misleading.

2.       SHARES

2.1      The AES Seller is the only legal and beneficial owner of the Shares.

2.2      The Shares comprise the whole of AES's allotted and issued share
         capital, have been properly allotted and issued and are fully paid or
         credited as fully paid.

2.3      There is no Encumbrance, and there is no agreement, arrangement or
         obligation to create or give an Encumbrance, in relation to any of the
         Shares or unissued shares in the capital of AES.

3.       SUBSIDIARY UNDERTAKINGS

         AES does not have and has never had a subsidiary undertaking. AES has
         no interest in, and has not agreed to acquire an interest in a
         corporate body or other undertaking.

4.       ACCOUNTS

4.1      GENERAL

         4.1.1    The Accounts have been prepared and audited on a proper and
                  consistent basis in accordance with the law and applicable
                  standards, principles and practices generally accepted in the
                  United Kingdom.

         4.1.2    No change in accounting policies has been made in preparing
                  the accounts of AES for each of the three financial years of
                  AES ended on the Last Accounting Date, except as stated in the
                  audited balance sheets and profit and loss accounts for those
                  years.

         4.1.3    The Accounts show a true and fair view of the assets,
                  liabilities and state of affairs of AES as at the Last
                  Accounting Date and of the profits and losses of AES for the
                  financial year ended on the Last Accounting Date.


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4.2      DEBTS AND LIABILITIES

         The Accounts fully disclose and provide adequately for all bad and
         doubtful debts, existing at the Last Accounting Date as are required to
         be disclosed or provided for in accordance with applicable standards,
         principles and practices accepted in the United Kingdom.

4.3      EXTRAORDINARY AND EXCEPTIONAL ITEMS

         The results shown by the audited profit and loss account of AES for
         each of the three financial years of AES ended on the Last Accounting
         Date have not (except as disclosed in those accounts) been affected by
         any extraordinary, exceptional or nonrecurring item or by any other
         matter making the profit or loss for a period covered by any of those
         accounts unusually high or low.

4.4      MANAGEMENT ACCOUNTS 

         The Management Accounts:

         4.4.1    have been prepared in consistency with the reporting
                  principles applied by the management of AES;

         4.4.2    fairly present in all material respects, AES's financial
                  position, results of its operations and changes in its
                  financial position at and for the periods specified therein;
                  and

         4.4.3    are consistent with and have been extended from the books and
                  records of AES.

4.5      ACCOUNTING RECORDS

         AES's accounting records are up-to-date, in its possession or under its
         control and fully and accurately completed in accordance with the law
         and applicable standards, principles and practices generally accepted
         in the United Kingdom.

5.       CHANGES SINCE THE LAST ACCOUNTING DATE

5.1      GENERAL

         Since the Last Accounting Date:

         5.1.1    AES's business has been conducted in the usual way and AES has
                  been maintained as a going concern;

         5.1.2    there has been no adverse change in the financial or trading
                  position or prospects of AES.


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5.2      SPECIFIC

         Since the Last Accounting Date:

         5.2.1 AES has not, other than in the usual course of its business:

                  (a)      acquired or disposed of, or agreed to acquire or
                           dispose of, a material asset; or

                  (b)      assumed or incurred, or agreed to assume or incur, a
                           liability, obligation or expense (actual or
                           contingent);

         5.2.2    AES has not factored, sold or agreed to sell a debt other than
                  in the usual course of its business;

         5.2.3    AES has not made, or agreed to make, capital expenditure
                  exceeding in total (pound)50,000 (or its equivalent at the 
                  time) or incurred, or agreed to incur, a commitment or 
                  commitments involving capital expenditure exceeding in total 
                  (pound)50,000 (or its equivalent at the time);

         5.2.4    AES's business has not been materially and adversely affected
                  by the termination, or a change in the terms, of an important
                  agreement or by the loss of a customer or supplier or by an
                  abnormal factor not affecting similar businesses and the AES
                  Seller is not aware of a matter which might have a material
                  and adverse effect on AES's business;

         5.2.5    AES has not declared, paid or made a dividend or distribution
                  (including, without limitation, a distribution within the
                  meaning of the Taxes Act) except as provided in the Accounts;

         5.2.6    AES has not created, allotted, issued, acquired, repaid or
                  redeemed share or loan capital, or made an agreement or
                  arrangement or undertaken an obligation to do any of those
                  things.

6.       TAX

         6.1      The Accounts make full provision for all Taxation for which
                  AES was then or thereafter became or may hereafter become
                  liable or accountable in respect of or by reference to any
                  income, profit, receipt, gain transaction, agreement,
                  distribution or event which was earned, accrued, received,
                  realised, entered into, paid, made or accrued on or before the
                  Last Accounting Date and proper provision was made therein for
                  deferred liablities to Taxation in accordance with generally
                  accepted accounting principles and AES has promptly paid or
                  fully provided in its books of

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                  account for all Taxation for which it has or may hereafter
                  become liable or accountable in the period from the Last
                  Accounting Date to the date hereof.

6.2      Save as provided for in the Accounts there is no liability for Taxation
         which would arise on AES ceasing to trade or on its ceasing to use or
         occupy any asset for the purposes of its trade or on its disposing of
         any asset at its book value as shown in the Accounts or which might
         arise in the event of any other person failing to pay any Tax charged,
         assessed or payable by him (including any liability which might arise
         as a combined result of two or more such events) but excluding any
         liability which would arise solely as a result of the realisation of
         trading stock or work in progress by AES in the ordinary course of its
         business and no material changes have occurred since the Last
         Accounting Date which might result in any such liability.

6.3      AES is not aware of any circumstance which will or may, whether by
         lapse of time or the issue of any notice of assessment or otherwise,
         give rise to any dispute with any Tax Authority in relation to its
         liability or accountability for Taxation, any claim made by it, any
         relief, deduction, or allowance afforded to it, or in relation to the
         status or character of AES (whether as to its status as an unquoted
         trading private company or as a member of any group) under or for the
         purpose of any provision of any legislation relating to Taxation.

6.4      Since the Last Accounting Date no further liability or contingent
         liability for Taxation on AES has arisen or is likely to or will arise
         otherwise than as a result of transactions (not including
         distributions) entered into by AES in the ordinary course of trading
         after the Last Accounting Date.

6.5      AES is not liable and has not since the Last Accounting Date been
         liable to pay any interest, penalty, fine or sum of a similar nature in
         respect of Taxation.

6.6      AES has duly complied with all requirements imposed on it by any
         legislation relating to Taxation and in particular has properly kept
         all records and documents so required to be kept, has properly and
         punctually made all returns and provided full and complete information
         to the Inland Revenue, Customs and Excise and any other body concerned
         as so required, has paid all Taxation charged, assessed, levied or
         payable in accordance with applicable legislation as and when it became
         due and has deducted Tax from all payments where the law requires such
         deduction and accounted to the Inland Revenue or other fiscal body for
         the Tax so deducted.

7.       ASSETS

7.1      TITLE AND CONDITION

         7.1.1    Each asset included in the Accounts or acquired by AES since
                  the Last Accounting Date (other than stock disposed of in the
                  usual course of business) is:

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                  (a)      legally and beneficially owned by AES free from any
                           Encumbrance;

                  (b)      where capable of possession, in the possession or
                           under the control of AES; and

                  (c)      situated in the United Kingdom.

         7.1.2    AES owns each asset necessary for the continued operation of
                  its business with the exception of the Property.

         7.1.3    So far as the AES Seller is aware without having made any
                  enquiry other than the commissioning of the report contained
                  in the Disclosure Letter. AES does not own databases, software
                  or hardware, the performance of which will be adversely
                  affected by dates after the commencement of the year 2000.

7.2      HIRE PURCHASE AND LEASED ASSETS

         AES is not a party to, or is liable under, a lease or hire, hire
         purchase, credit sale or conditional sale agreement.

7.3      NET ASSETS

         At Completion AES has net assets of (pound)2,300,000 calculated on a
         basis consistent with the Accounts and in accordance with the law and
         applicable standards, principles and practices general accepted in the
         United Kingdom Save that all income which would not normally accrue
         until the end of March 1998 shall be deemed to have accrued
         proportionately during the month on a daily basis and Provided that the
         provisions existing as at 28 February 1998 remaining unchanged.

7.4      INTELLECTUAL PROPERTY

         7.4.1    Each of the Intellectual Property Rights is legally and
                  beneficially owned by AES alone, free from any licence,
                  Encumbrance, restriction on use or disclosure obligation.

         7.4.2    Schedule 6 contains details of the registered Intellectual
                  Property Rights and details of the licences entered into by
                  AES with respect to the Intellectual Property Rights
                  (including, without limitation, applications for registration)
                  in respect of which AES is the registered owner or applicant
                  for registration.

         7.4.3    Renewal fees payable in respect of the registered Intellectual
                  Property Rights have been paid. Each other action to maintain
                  and protect the registered Intellectual Property Rights has
                  been taken.

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         7.4.4    AES has not granted and is not obliged to grant a licence,
                  assignment or other right in respect of any of the
                  Intellectual Property Rights.

         7.4.5    So far as the AES Seller is aware, there is, and has been, no
                  infringement of any of the Intellectual Property Rights.

         7.4.6    The Intellectual Property Rights comprise all the Intellectual
                  Property necessary for AES to operate its business as it has
                  been operated before the date of this Agreement.

         7.4.7    AES is not a party to a confidentiality, non-compete or other
                  agreement which restricts the use or disclosure of information
                  or its ability to conduct its business.

         7.4.8    AES does not use, or operate its business under, a name other
                  than its corporate name.

         7.4.9    The Intellectual Property Rights owned by AES are subsisting
                  and are not subject to any claims for total or partial
                  revocation or removal, entitlement or compensation under
                  sections 40-43 of The Patents Act 1977 and there are no
                  circumstances which may give rise to such a claim.

         7.4.10   So far as the AES Seller is aware the processes and methods
                  employed, the services provided, the businesses conducted and
                  the products manufactured, used or dealt in by AES within the
                  last 6 years do not infringe and have not during that period
                  infringed the rights of any other person in any Intellectual
                  Property.

         7.4.11   If required to do so under the Data Protection Act 1984, AES
                  has duly registered as a data user and has complied with the
                  data protection principles as set out in the Data Protection
                  Act 1984.

         7.4.12   So far as the AES Seller is aware AES is not in breach of any
                  material term of any licence set out in schedule 6.

7.5      DEBTORS

         7.5.1    No debt shown in the Accounts or AES's accounting records (a
                  schedule of which are contained in the Disclosure Letter) is
                  overdue by more than 30 days or is the subject of an
                  arrangement not made in the usual course of AES's business.

         7.5.2    AES has not released a debt shown in the Accounts or its
                  accounting records so that the debtor has paid or will pay
                  less than the debt's book value. None of those debts has been
                  deferred, subordinated or written off or become irrecoverable
                  to any extent. The AES Seller has no reason to believe that
                  any of those debts will fail to realise its book value in the
                  usual course of collection.

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         7.5.3    The Disclosure Letter contains an aged debtors list Of AES's
                  debtors as of a date not more than three (3) days prior to
                  Completion.

7.6      BANK BALANCES

         The Disclosure Letter contains copies of bank statements which have
         been reconciled to show the net cash position of AES as at the date to
         which they Ore drawn up, which is no more than 3 days prior to
         Completion.

8.       INSURANCE

8.1      The Disclosure Letter contains a list of each current insurance policy
         which is currently in force in respect of which AES has an interest.

8.2      Details of all insurance claims that have been made on behalf of AES in
         the preceding 5 years are set out in the Disclosure Letter.

9.       ENVIRONMENTAL MATTERS

9.1      In this paragraph 9:

         9.1.1    "Environmental Law" means any statute, rule, regulation,
                  statutory instrument, treaty, directive, direction, decision,
                  by-law, code of practice, circular, guidance note, order,
                  notice, demand, injunction, rule of common law or statutory or
                  common law duty of care of (in each case) any governmental
                  authority or agency or any regulatory or other body (whether
                  in the United Kingdom or overseas, including the United
                  States) in relation to Environmental Matters, but only to the
                  extent that breach of the same creates legally enforceable
                  rights and responsibilities including but not limited to, the
                  Comprehensive Environmental Response, Compensation and
                  Liability Act ("CERCLA") 42 U.S.C. 9601 et seq., as amended.

         9.1.2    "Environmental Licence" means any licence, registration,
                  permit, authorisation, approval or consent relating to
                  Environmental Matters which under Environmental Law may be
                  necessary in connection with the current use of the Property
                  or Premises and/or any process or activity currently carried
                  on at the Property or Premises or otherwise in connection with
                  the business of AES or PEI (as the case may be), and
                  "Environmental Licences" shall be construed accordingly.

         9.1.3    "Environmental Matters" means any matter affecting the
                  environment including (but not limited to) each of the
                  following:


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                  (a)      the release, emission, entry or introduction of any
                           Relevant Substance into the air including (but not
                           limited to) the air within buildings and other
                           natural or man-made structures above or below ground;

                  (b)      the release of any Relevant Substance into water
                           including (but not limited to) water as defined in
                           Section 1 (11) (a)(ii) and (iii) of the Environmental
                           Protection Act 1990, or into ground waters as defined
                           in Section 1 (12) of the Environmental Protection Act
                           1990, sewer or the sea;

                  (c)      the release, deposit, storage or disposal of any
                           Relevant Substance in or on or about the land or
                           soil;

                  (d)      the generation, treatment, importation, exportation,
                           transportation, handling, processing, manufacture or
                           collection of any Relevant Substance; and

                  (e)      nuisance, litter, noise and the abstraction of water.

         9.1.4    "Premises" means the premises occupied by PEI at Suite 500,
                  4550 New Linden Hill Road, Wilmington, Delaware 19808,

         9.1.5    "Relevant Substance" means any energy, force or substance
                  (including any substance resulting from the interaction of
                  substances present in the environment following the release
                  into the environment of another substance or substances) which
                  causes or is capable of causing pollution of the environment
                  or harm to man or any other living organisms supported by the
                  environment and any waste as described or listed in or
                  pursuant to any Environmental Law.

9.2      The activities of AES or PEI (as the case may be) are and have at all
         times been carried on in compliance with relevant Environmental Law.

9.3      AES or PEI (as the case may be) has obtained all Environmental
         Licences, none of which are of limited duration or subject to onerous
         conditions. All fees payable in relation to any Environmental Licence
         have been paid and there has been no default in the observance of any
         Environmental Licence by AES or PEI (as the case may be), its
         directors, officers, employees or agents. No steps have been taken for
         the revocation, cancellation, withdrawal, variation or surrender of any
         Environmental Licence and no material circumstances exist which could
         give rise to any revocation, cancellation, withdrawal, amendment,
         variation or restriction upon transfer of any Environmental Licence or
         which would prevent compliance with any of the terms of it or which
         might prevent any Environmental Licence being extended, renewed or
         granted. No further applications for an Environmental Licence are
         pending.

9.4      AES or PEI (as the case may be) has not received nor had notice of any
         claim, notice, requirement or complaint from any person, regulatory
         body, governmental authority, court or other competent organisation in
         respect of Environmental Matters which:

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         9.4.1    might prevent the continued use of any part of any of the
                  Premises in the manner and for the purpose for which it is now
                  being used;

         9.4.2    requires any remedial work or so far as PEI is concerned
                  cleaning to the Property or Premises or the clearance,
                  removal, or so far as PEI is concerned containment from the
                  Property or Premises of any Relevant Substance; or

         9.4.3    alleges any breach of Environmental Law;

         and as far as the AES Seller or the PEI Seller (as the case may be) is
         aware there is no act, omission or circumstance which would or might
         give rise to an entitlement or obligation to give such notice or
         communication.

9.5      Neither AES or PEI (as the case may be) nor so far as the AES Seller or
         the PEI Seller (as the case may be) is aware any present occupier or
         user of the Property or Premises has engaged in or permitted nor so far
         as the AES Seller or the PEI Seller (as the case may be) is aware has
         any previous owner, occupier or user of the Property or Premises
         engaged in or permitted any operations or activities on the Property or
         Premises involving the use, storage, handling, release, treatment,
         manufacture, processing, deposit, transportation or disposal of any
         Relevant Substance.

9.6      No discharge, release, leaching, disposal, emission or escape of any
         Relevant Substance has occurred or is occurring in the conduct of the
         Business or in the conduct by AES or PEI (as the case may be) of any
         former business or in connection with or in relation to any former
         premises or former assets of AES or PEI (as the case may be) while such
         former premises or assets were in the ownership or under the control of
         AES or PEI (as the case may be).

9.7      There is no underground storage tank present at the Property or
         Premises.

9.8      The Property or Premises is not is not nor has it been contaminated
         with any Relevant Substance and none of the former premises was
         contaminated with any Relevant Substance during the period of use,
         ownership, occupation or control of such former premises by AES or PEI
         (as the case may be). As far as the AES Seller or the PEI Seller (as
         the case may be) is aware, no premises in the vicinity of the Property
         or Premises have been used as a landfill nor has there been any
         release, discharge or disposal of any Relevant Substance by any third
         party in the vicinity of the Property or Premises.

9.9      No process or activity has been carried on at the Property or Premises
         which has caused or will cause pollution of the environment or harm to
         human health (in each case within the meaning of the Environmental
         Protection Act 1990 (or so far as PEI is concerned other Environmental
         Law)) or will result in a legally enforceable obligation on AES or PEI
         (as the case may be) in respect of such pollution or harm to human
         health.


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9.10     None of the Premises is or has been affected by any surface or
         subterranean working of mines and minerals.

9.11     AES or PEI (as the case may be) currently satisfies the conditions
         attaching to authorisations required under Section 6 of the
         Environmental Protection Act 1990. The AES Seller or the PEI Seller 
         (as the case may be) is not aware of any changes likely to occur in the
         foreseeable future to such conditions.

9.12     No works (or so far as PEI only is concerned) response or removal
         actions have been carried out at the Property or Premises under any
         Environmental Law by any statutory authority in respect of which such
         authority is entitled to recover its costs.

9.13     There are attached to the Disclosure Letter copies of all Environmental
         Licences, together with all amendments to or variations of any
         Environmental Licence, now subsisting in relation to the Property or
         Premises.

10.      AGREEMENTS

         10.1     VALIDITY OF AGREEMENTS

         So far as the AES Seller is aware no party with whom AES has entered
         into an agreement or arrangement is in material breach of the agreement
         or arrangement.

10.2     MATERIAL AGREEMENTS

         10.2.1   AES is not a party to and is not liable under an onerous or
                  unusual agreement, arrangement or obligation.

         10.2.2   AES is not a party to and is not liable under:

                  (a)      an agreement, arrangement or obligation by which AES
                           is a member of a joint venture, consortium,
                           partnership of association (other than a bona fide
                           trade association);

                  (b)      a distributorship, agency or management agreement or
                           arrangement;

                  (c)      an agreement which may be terminated or is breached 
                           as a result of the transfer of the Shares; or

                  (d)      an agreement, arrangement or obligation under which
                           AES may be required to pay a royalty or commission.

10.3     The Disclosure Letter contains a schedule of:

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         10.3.1   all agreements for the supply of products or services by AES
                  in respect of which AES is still awaiting payment of the
                  primary consideration where such consideration will exceed
                  (pound)75,000 or where such agreement is backed by a
                  performance bond or guarantee given on behalf of AES and so
                  far as the AES Seller is aware AES is not in default of any
                  such agreement; and

         10.3.2   all agreements for the supply of products or services to AES
                  which were entered into within the preceding twelve months and
                  Which amount to in excess of ten percent of AES's total spend
                  on supply of products and services to it within such period.

         10.3.3   all agreements or contracts for the supply of products or
                  services by AES which contain liquidated damage or similar
                  provisions in excess of 10% of the total contract price.

         10.3.4   all other agreements or contracts which, to the AES Seller's
                  knowledge, are material to the business of AES other than any
                  agreement or contract that (i) may be cancelled by AES on
                  thirty day's notice or less without incurring a liability or
                  obligation on the part of AES for such cancellation, or (ii)
                  involves or is reasonably expected to involve the payment of
                  consideration having an aggregate value of less than
                  (pound)25,000.

10.4     CONDITIONS AND WARRANTIES IN RESPECT OF GOODS OR SERVICES

         10.4.1   Except for a condition or warranty implied by law or contained
                  in its standard terms of business or otherwise given in the
                  usual course of business, AES has not given a condition or
                  warranty, or made a representation, in respect of goods or
                  services supplied or agreed to be supplied by it, or accepted
                  an obligation that could give rise to a liability after the
                  goods or services have been supplied by it.

         10.4.2   There have been no claims of customers or others based on an
                  alleged or admitted defect of material, workmanship or design
                  or otherwise in or in respect of any of AES's products which:

                  (a)      have resulted in the requirement to make payment or
                           accept a discount in the aggregate in excess of
                           (pound)100,000 per annum; or

                  (b)      are presently pending or, to the knowledge of the AES
                           Seller, threatened other than claims in the aggregate
                           not in excess of (pound)100,000 save for the
                           rectification work which is currently in progress on
                           the Eastbourne Lamella contract with Biwater Europe
                           which is fully provided for in the Management
                           Accounts and for the avoidance of doubt knowledge of
                           potential claims under the Eastbourne Lamella
                           contract with Biwater Europe shall not effect the AES
                           Buyer's right to claim under the Warranties (other
                           than this Warranty)

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                           nor constitute actual knowledge of any breach of
                           warranty for the purposes of clause 4.4 of this
                           Agreement.

11.      TERMS OF TRADE AND BUSINESS

11.1     CREDITORS

         No debt owing by AES has been outstanding for more than four weeks
since the due date.

11.2     SUPPLIERS AND CUSTOMERS

         11.2.1   During the year ending on the date of this Agreement no
                  customer (representing more than ten percent of AES's turnover
                  in the preceding 12 months) or supplier (representing more
                  than ten percent of the value of the total supplies acquired
                  by AES during the preceding 12 months) of AES has:

                  (a)      stopped, or indicated an intention to stop, trading
                           with or supplying AES;

                  (b)      reduced, or indicated an intention to reduce,
                           substantially its trading with or supplies to AES; or

                  (c)      changed, or indicated an intention to change,
                           substantially the terms on which it is prepared to
                           trade with or supply AES (other than normal price and
                           quota changes).

         11.2.2   So far as the AES Seller is aware, the attitude of customers,
                  suppliers and employees with regard to AES will not be
                  prejudicially affected by the execution or performance of this
                  Agreement or a document to be executed at or before
                  Completion.

12.      EMPLOYEES

12.1     GENERAL

         12.1.1   AES is not a party to a consultancy contract.

         12.1.2   The Disclosure Letter contains copies of the contract of each
                  director, other officer and employee of AES entitled to a
                  basic wage at an annual rate, of more than (pound)25,000 per
                  annum.

         12.1.3   AES is not obliged to increase, nor has it made provision to
                  increase, the total annual remuneration payable to its
                  directors, other officers and employees by more than five
                  percent since the Last Accounting Date. The last pay review
                  took effect on 1 April 1997.

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         12.1.4   AES owes no amount to a present or former director, other
                  officer or employee of AES (or his dependent) other than for
                  accrued remuneration or reimbursement of business expenses.

         12.1.5   There is no agreement or arrangement between AES and an
                  employee or former employee with respect to his employments
                  his ceasing to be employed or his retirement which is not
                  included in the written terms of his employment or previous
                  employment. AES has not provided, or agreed to provide, a
                  gratuitous payment or benefit to a director, officer or
                  employee or to any of their dependents.

12.2     TRADE UNIONS

         12.2.1   AES has no agreement or arrangement with and does not
                  recognise a trade union, works council, staff association or
                  other body representing any of its employees.

         12.2.2   AES is not involved in, and no matter exists which might give
                  rise to, a dispute with a trade union, works council, staff
                  association or other body representing any of its employees.

13.      LIABILITIES

13.1     INDEBTEDNESS

         Except as disclosed in the Accounts or in the Disclosure Letter, AES
         does not have outstanding and has not agreed to create or incur loan
         capital, borrowing or indebtedness in the nature of borrowing,
         including, without limitation, a bank overdraft, a liability under an
         acceptance (other than a normal trade bill) and an acceptance credit.

13.2     GUARANTEES AND INDEMNITIES

         13.2.1   AES is not a party to and is not liable (including, without
                  limitation, contingently) under a guarantee, indemnity or
                  other agreement to secure or incur a financial or other
                  obligation with respect to another person's obligation.

         13.2.2   No part of the loan capital, borrowing or indebtedness in the
                  nature of borrowing of AES is dependent on the guarantee or
                  indemnity of, or security provided by, another person.

13.3     EVENTS OF DEFAULT

         There is no event has occurred or been alleged which constitutes an
         event of default, or otherwise gives rise to an obligation to repay,
         under an agreement relating to borrowing or indebtedness in the nature
         of borrowing.

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13.4     GRANTS

         AES is not liable to repay an investment or other grant or subsidy made
         to it by a body.

14.      PERMITS

14.1     COMPLIANCE WITH PERMITS

         AES has obtained and complied with the terms and conditions of each
         Permit (details of which are contained in the Disclosure Letter).

14.2     STATUS OF PERMITS

         14.2.1   Each Permit is in force and there is no indication that any
                  Permit might be revoked, suspended, cancelled, varied or not
                  renewed. No Permit and no condition to which any Permit is
                  subject is personal to the AES Seller.

         14.2.2   Each action required for the renewal or extension of each
                  Permit has been taken.

15.      INSOLVENCY, WINDING UP, ETC.

15.1     WINDING UP AND ADMINISTRATION

         No order has been made, petition presented or resolution passed for the
         winding up of AES or for the appointment of a provisional liquidator to
         AES or for an administration order in respect of AES.

15.2     RECEIVERSHIP

         No receiver or receiver and manager has been appointed of the whole or
         part of AES's business or assets.

15.3     VOLUNTARY ARRANGEMENTS

         No voluntary arrangement has been proposed under section 1 of the
         Insolvency Act 1986 in respect of AES. No compromise or arrangement has
         been proposed, agreed to or sanctioned under section 425 of the Act in
         respect of AES.

15.4     INSOLVENCY

         AES is not insolvent or unable to pay its debts within the meaning of
         section 123 of the Insolvency Act 1986.

                                       41

<PAGE>   42



15.5     PAYMENT OF DEBTS

         AES has not stopped paying its debts as they fall due.

15.6     DISTRESS ETC.

         No distress, execution or other process has been levied on an asset of
AES.

15.7     UNSATISFIED JUDGMENTS

         There is no unsatisfied judgment, undertaking or court order
         outstanding against AES.

15.8     STRIKING OUT

         No action is being taken by the registrar of companies to strike AES
         off the register under section 652 of the Act.

16.      COMPETITION

16.1     INVESTIGATIONS

         AES has not received a communication or request for information
         relating to any aspect of AES's business from or by the Director
         General of Fair Trading, Monopolies and Mergers Commission, Secretary
         of State for Trade and Industry, Commission of the European
         Communities, EFTA Surveillance Authority or a competition or
         governmental authority of another jurisdiction. No agreement,
         arrangement or conduct (by omission or otherwise) of AES has been the
         subject of an investigation, report or decision by any of those persons
         or bodies,

17.      PENSIONS AND OTHER BENEFITS

         In these Pension Warranties, defined terms not appearing in clause 1
         (interpretation) of this Agreement shall be interpreted in accordance
         with defined terms appearing in paragraph 1 (interpretation) of
         Schedule 5 (pension arrangements) to this Agreement.

17.1     AES neither operates nor is a participant in any pension arrangements
         other than the Pension Schemes. It has no legal or moral obligation to
         provide "relevant benefits" within the meaning of section 612(l) of the
         Taxes Act other than under the Pension Schemes. Further, AES does not
         operate or participate in or have any legal or moral obligation to
         contribute to any permanent health insurance, private health provision,
         accident benefit or any other ancillary schemes.


                                       42

<PAGE>   43



17.2     Each of the Pension Schemes is an exempt approved scheme within section
         592(l) of the Taxes Act. The AES Seller is not aware of any matter
         which could result in the withdrawal of that approval.

17.3     Each of the Pension Schemes is a contracted-out scheme for the purposes
         of Part III of the Pension Schemes Act 1993. The AES Seller is not
         aware Of any matter which could result in its contracted-out status
         being withdrawn.

17.4     All contributions payable by AES and all contributions due from members
         to the Pension Schemes have been made at the rate stipulated by the
         Actuary to the Pension Schemes in the most recent actuarial
         investigation of each of the Pension Schemes.

17.5     AES has so far as the AES Seller is aware fulfilled all its obligations
         under the Pension Schemes.

17.6     True copies of the Trust Deeds and Rules and ancillary deeds of each of
         the Pension Schemes have been delivered to the Buyer together with true
         copies of all relevant explanatory booklets, announcements and other
         communications to employees relating to the Pension Schemes.

17.7     Each of the Pension Schemes is governed solely by these deeds and
         documents which have been properly and validly brought into effect. AES
         has so far as the AES Seller is aware no obligation to either of the
         Pension Schemes in respect of any present or former employees or
         directors other than under these deeds and documents.

17.8     True copies of the last actuarial report on each of the Pension Schemes
         the relevant extracts from AES's latest statutory accounts in respect
         of the application of SSAP 24 and the latest accounts of each of the
         Pension Schemes and the cost of providing any ancillary benefits
         described in warranty 1 have been delivered to the AES Buyer.

17.9     There is no investigation in progress or pending either by the
         Occupational Pensions Regulatory Authority ("OPRA") into either of the
         Pension Schemes and/or the benefits provided under it or by the
         Pensions Ombudsman concerning any employee of AES.

17.10    No claim has been made against AES the respective trustees or
         administrator of the Pension Schemes or against any other person whom
         AES is or may be liable to compensate or indemnify in respect of any
         act, omission or other matter concerning the Pension Schemes.

17.11    The Company has never participated in an occupational pension scheme
         which has been closed to new members.

17.12    All actuarial, consultancy, legal and other fees charges or expenses in
         respect of the Pension Schemes payable by AES have been paid.

                                       43

<PAGE>   44



17.13    So far as the AES Seller is aware there are no retrospective
         contributions due from AES to the Pension Schemes.

18.      LITIGATION AND COMPLIANCE WITH LAW

18.1     LITIGATION

         18.1.1   Neither AES nor so far as the AES Seller is aware a person for
                  whose acts or defaults AES may be vicariously liable is
                  involved, or has during the two years ending on the date of
                  this Agreement been involved, in a civil, criminal,
                  arbitration, administrative or other proceeding in any
                  jurisdiction. No civil, criminal, arbitration, administrative
                  or other proceeding in any jurisdiction is pending or, so far
                  as the AES Seller is aware, threatened by or against AES or a
                  person for whose acts or defaults AES may be vicariously
                  liable.

         18.1.2   So far as the AES Seller is aware, no matter exists which
                  might give rise to a civil, criminal, arbitration,
                  administrative or other proceeding in any jurisdiction
                  including an industrial tribunal involving AES or a person for
                  whose acts or defaults AES may be vicariously liable.

         18.1.3   There is no outstanding judgment, order, decree, arbitral
                  award or decision of a court, tribunal, arbitrator or
                  governmental agency in any jurisdiction against AES or a
                  person for whose acts Or defaults AES may be vicariously
                  liable.

18.2     COMPLIANCE WITH LAW

         AES has conducted its business and the goods and services supplied by
         AES have been supplied in all material respects in accordance with all
         applicable legal and administrative requirements in any jurisdiction.

19.      INSIDER AGREEMENTS

         There is, and during the three years ending on the date of this
         Agreement there has been, no agreement or arrangement (legally
         enforceable or not) to which AES is or was a party and in which the AES
         Seller, another Group Company, a director or former director of AES or
         a person connection with any of them is or was interested in any way.
         For this purpose, "connected" has the meaning given by section 839 of
         the Taxes Act, except that in construing section 839 "control" has the
         meaning given by section 840 or section 416 of the Taxes Act so that
         there is control whenever either section 840 or 416 requires.

20.      CONSTITUTION, REGISTERS AND RETURN

20.1     CONSTITUTION

                                       44

<PAGE>   45



         AES is operating and has always operated its business in all respects
         in accordance with its memorandum and articles of association at the
         relevant time.

20.2     REGISTERS ETC.

         Each register, minute book and other books and records which the Act
         requires AES to keep is in the possession of or control of AES, has
         been properly kept and in all material respects contains a complete and
         accurate record of the matters which it is required by the Act to
         record. No notice has been received or allegation made that a register
         or books and records is incorrect or should be rectified.

20.3     RETURNS ETC.

         All return, particulars, resolutions and other documents required to be
         delivered by AES to the registrar of companies or another governmental
         of other authority or agency have been properly prepared and delivered.

20.4     POWERS OF ATTORNEY AND AUTHORITIES

         AES has given no power of attorney or other authority by which a person
         may enter into an agreement, arrangement or obligation on the Group
         Company's behalf (other than an authority for a director, other officer
         or employee to enter into an agreement in the usual course of his
         duties).

21.      BROKERAGE OR COMMISSIONS

         No person is entitled to receive from AES a finder's fee, brokerage or
         commission in connection with this Agreement or anything contained in
         it.



                                       45

<PAGE>   46



PART 2 - WARRANTIES IN RESPECT OF PEI


All warranties contained in Part 1 of this Schedule 3 shall apply to PEI as if:

1.       all references to AES were references to PEI;

2.       all references to the AES Seller were to the PEI Seller;

3.       all references to the Shares were to the PEI Shares;

4.       all references to the Accounts or to the Management Accounts were to
         the PEI Accounts; and

5.       all references to the Last Accounting Date were to December 31, 1997;

6.       subject to the following exceptions and the matters disclosed in the
         portion of the Disclosure Letter pertaining to PEI.

         (Numbered paragraph references below are to Part 1 of this Schedule 3)

6.1      Paragraph 2.2 shall read as follows with respect to PEI:

         "The PEI shares have been duly issued, are full-paid and
         non-assessable, and constitute the only outstanding shares of capital
         stock of PEI. There are no warrants, options or other rights to
         purchase, or securities convertible into, shares of capital stock of
         PEI."

6.2      Paragraphs 4.1 through to 4.3 and 4.5 shall be inapplicable (there
         being no audited financial statements for PEI). The following shall be
         added to paragraph 4.4 with respect to the PEI Accounts:

         "No material change in accounting policies has been made in preparing
         the PEI Accounts or the comparable accounts for the two fiscal years
         ended 31 March 1996. The PEI Accounts fully disclose and provide
         adequately for bad and doubtful accounts receivable in accordance with
         accounting reporting standards of Anglian Water plc. The results of
         operations of PEI reflected in the PEI Accounts have not (except as
         disclosed in such accounts) been affected by an extraordinary,
         exceptional or non-recurring item or by any other matter including the
         profit or loss for a period covered by the PEI Accounts unusually high
         or low."

6.3      In paragraph 5.2.3 the currency reference shall be $75,000.


                                       46

<PAGE>   47



6.4      Paragraph 6 shall read as follows with respect to PEI:

         "TAX

         6.1      Except as set forth in the Disclosure Letter, PEI and any
                  affiliated, consolidated, combined or unitary group of which
                  PEI is a member for federal, state, local or foreign Tax
                  purposes (a "Tax Group") has duly and timely filed or caused
                  to be filed (or, in the case of the most recently ended
                  taxable year with respect to each applicable Tax, requests for
                  an extension have been filed for) all federal and state, local
                  and foreign Tax returns, reports, estimates and information
                  and other statements and returns of any nature whatsoever
                  (collectively, "Tax Returns") required to be filed by or on
                  behalf of PEI or any Tax Group, pursuant to any applicable
                  federal, state, local or foreign tax laws for all years and
                  periods for which such Tax Returns have become due. All such
                  Tax Returns are true, accurate and complete in all respects,
                  and all amounts shown as owing on such Tax Returns, or with
                  respect or periods to which such Tax Returns relate, have been
                  paid in full.

         6.2      For purposes of this Part 2 of Schedule 3, "Tax" (and with
                  correlative meaning, "Taxes" and "Taxing") shall mean:

                  6.2.1    any net income, alternative or add-on minimum tax,
                           gross income, gross receipts, sales, use, ad valorem,
                           value added, transfer, franchise, profits, license,
                           withholding on amounts paid to or by PEI, payroll,
                           employment, excise, severance, stamp, occupation,
                           premium, property, environmental or windfall profit
                           taxes, custom duties or Other taxes, governmental
                           fees or other like assessments or charges of any kind
                           whatsoever, together with any interest or any
                           penalty, addition to tax or additional amount imposed
                           by any governmental authority responsible for the
                           imposition of any such taxes (within or without the
                           United States); and

                  6.2.2    liability of PEI for the payment of any amounts of
                           the type described in 6.2.1 as a result of being a
                           member of a Tax Group pursuant to Treasury Regulation
                           1.1502-6 or any comparable state, local or foreign
                           statute or regulation, as a transferee or successor,
                           by contract or otherwise.

         6.3      PEI and any Tax Group have paid all Taxes, or where payment is
                  not yet due, have established, consistent with past practice
                  and in accordance with the AES Seller's customary accounting
                  practices, an adequate reserve on its books and records for
                  the payment of all Taxes with respect to any taxable period
                  (or portion thereof) ending on or before 31 March 1997 (or
                  otherwise relating or attributable to periods up to and
                  including 31 March 1997). As to all Tax periods, or portions
                  thereof, which began after 31 March 1997 and end prior to, or
                  include, the date of Completion for which no Tax Returns or
                  Tax payments are yet due (including extensions), the liability
                  of

                                       47

<PAGE>   48



                  PEI for Taxes with respect to such periods or portions
                  thereof, does not exceed the amount properly accruable for
                  such liability as a result of operations and transactions in
                  the ordinary course of business of PEI through the date of
                  Completion in accordance with the past practice and custom of
                  PEI.

         6.4      For the taxable year ending 31 March 1997 and for all
                  subsequent periods up to and including Completion, PEI has
                  been an includible member of the "affiliated group" (within
                  the meaning of section 1504 of the Internal Revenue Code of
                  1986, as amended (the "Code")) of which the PEI Seller is the
                  parent; for such periods PEI was entitled to report its income
                  on consolidated federal income Tax Return$ filed on behalf of
                  such affiliated group and, for such periods, all federal
                  income Tax Returns required to be filed by PEI have been (or
                  will be) duly and timely filed on behalf of PEI on a
                  consolidated basis. For all periods prior to the taxable year
                  ending 31 March 1997 all federal income Tax Returns required
                  to be filed by PEI were duly and timely filed on a separate
                  company basis, and for all periods all other Tax Returns of
                  PEI have been filed on a separate company, non-combined, non-
                  consolidated and non-unitary basis.

         6.5      Except as set forth in the Disclosure Letter, none of the PEI
                  Seller, PEI or any of their affiliates (including any Tax
                  Group) has:

                  6.5.1    applied for or received a tax ruling (other than a
                           determination with respect to a qualified employee
                           benefit plan);

                  6.5.2    entered into any closing agreement under section 7121
                           of the Code (or any similar provision of state, local
                           or foreign law);

                  6.5.3    agreed to make any adjustment to its income or
                           deductions pursuant to section 481(a) of the Code (or
                           similar provision of state, local or foreign law); or

                  6.5.4    granted a power of attorney to any person regarding
                           any tax matter of PEI;

         6.6      Except as set forth in the Disclosure Letter:

                  6.6.1    none of PEI or any Tax Group is delinquent in the
                           payment of any Taxes;

                  6.6.2    no extensions of time have been granted to the
                           Company or any Tax Group to file any Tax Return
                           required by applicable law to be filed by or on
                           behalf of PEI prior to or on Completion, which have
                           expired, or will expire, on or before Completion
                           without such Tax Return having been filed;


                                       48

<PAGE>   49



                  6.6.3    no deficiency or adjustment for any Taxes has been
                           proposed, asserted or assessed against PEI or any Tax
                           Group and no federal, state, local or foreign audits
                           or other administrative proceedings or court
                           proceeding$ are pending with regard to any such
                           Taxes; and

                  6.6.4    no waiver or consent extending any statute of
                           limitations for the assessment or collection of any
                           Taxes, which waiver or consent remains in effect, has
                           been executed by or on behalf of PEI or any Tax
                           Group, nor are any requests for such waivers or
                           consents pending.

         6.7      Except as set forth in the Disclosure Letter, PEI is not a
                  party to any tax-sharing or allocation agreement (whether or
                  not in writing), nor is any amount due to or owed by PEI under
                  any tax-sharing or allocation agreement. Any Tax-sharing or
                  allocation agreement to which PEI is a party shall terminate
                  with respect to PEI as of Completion."

         6.8      PEI has complied in all material respects with all applicable
                  laws, rules and regulations relating to the payment and
                  withholding of Taxes and has, within the time and the manner
                  prescribed by law, withheld and paid over to the proper
                  governmental authorities, all amounts required to be so
                  withheld and paid over under applicable laws.

         6.9      PEI has not filed any consent of the type described under
                  Section 341(f) of the Code, nor is it subject to any
                  accumulated earnings penalties. PEI has not made any payments,
                  is not obligated to make any payments, and is not a party to
                  any agreement that under certain circumstances could oblige it
                  to make any payments that would not be deductible under
                  section 280G of the Code.

         6.10     PEI has not been a real property holding company within the
                  meaning of section 897(c)(2) of the Code during the applicable
                  period specified in Section 897(c)(1)(A)(ii) of the Code.

         6.11     Tax Indemnity:

                  6.11.1   the PEI Seller and the Seller Guarantor agree to, and
                           shall, indemnify the PEI Buyer, PEI and their
                           respective affiliates and hold each of them harmless
                           from and against any and all costs, expenses, losses,
                           Taxes and damages incurred or suffered by any of them
                           (including, without limitation, reasonable attorneys
                           fees and expenses) resulting from or attributable to:

                           (a)      the breach of any one or more of the
                                    representations or warranties set forth in
                                    6.1 to 6.10 above of this paragraph 6;


                                       49

<PAGE>   50



                           (b)      any claims, demands, suits, investigations,
                                    proceedings or actions by any third party
                                    containing or relating to allegations that,
                                    if true, would constitute a breach of any of
                                    the representations or warranties of PEI
                                    Seller set forth in 6.1 to 6.10 above of
                                    this paragraph 6;

                           (c)      any liability of PEI for Taxes with respect
                                    to any taxable period ending on or before 31
                                    March 1997, except to the extent such Taxes
                                    are reflected in the PEI Accounts as of that
                                    date;

                           (d)      any liability of PEI for Taxes relating to
                                    consolidated, combined or unitary Tax
                                    Returns which include PEI for periods (or
                                    portions thereof) ending on or before, or
                                    including, the date of Completion for which
                                    PEI could have liability pursuant to
                                    Treasury Regulation section 1.1502-6 or any
                                    comparable state, local or foreign statute
                                    or regulation, as a transferee or successor,
                                    by contract or otherwise; and

                           (e)      any liability for Taxes for any Tax period
                                    (or portion thereof) which begins after 31
                                    March 1997, and ends prior to, or includes,
                                    the date of Completion for which no Tax
                                    Returns or payments are yet due (including
                                    extensions) to the extent such liability
                                    exceeds the amount properly accruable for
                                    such liability as a result of operations and
                                    transactions in the ordinary course of
                                    business of PEI through the date of
                                    Completion in accordance with the past
                                    practice and custom of PEI. In no event
                                    shall PEI or the PEI Buyer have any claim or
                                    right of recovery under this paragraph 6
                                    unless and until the aggregate claim or
                                    claims of PEI and the PEI Buyer shall exceed
                                    $50,000, and then only to the extent of such
                                    excess;

                  6.11.2   for the purposes of paragraph 6.11.1 above, any
                           interest, penalty or additional charge included in
                           Taxes shall be deemed to be Tax for the period in
                           which the item on which the interest , penalty or
                           additional charge is based, and not a Tax for the
                           periods during which the item) accrues;

                  6.11.3   In respect of third party claims:

                           (a)      if any third party shall notify PEI or PEI
                                    Buyer (the "INDEMNIFIED PARTY") with respect
                                    to any matter (a "THIRD PARTY CLAIM") which
                                    may give rise to a claim for indemnification
                                    against the PEI Seller or the Seller
                                    Guarantor (the "Indemnifying Party") under
                                    this paragraph 6.11.3(a) of this Schedule 3,
                                    then the Indemnified Party shall promptly
                                    notify each Indemnifying Party thereof in
                                    writing; provided, however, that no delay on
                                    the part of the Indemnified Party shall
                                    relieve the Indemnifying Party from any
                                    obligation hereunder unless

                                       50

<PAGE>   51



                                   (and then solely to the extent) the 
                                   Indemnifying Party thereby is prejudiced;

                           (b)      any Indemnifying Party will have the right
                                    to defend the Indemnified Party against the
                                    Third Party Claim with counsel of its choice
                                    reasonably satisfactory to the Indemnified
                                    Party so long as (i) the Indemnifying Party
                                    has given notice of the Third Party Claim
                                    that the Indemnifying Party will indemnify
                                    the Indemnified Party from and against the
                                    entirety of any adverse consequences the
                                    Indemnified Party may suffer resulting from,
                                    arising out of, relating to, in the nature
                                    of, or caused by the Third Party Claim, and
                                    (ii) the Indemnifying Party conducts the
                                    defence of the Third Party Claim actively
                                    and diligently;

                           (c)      so long as the Indemnifying Party is
                                    conducting the defence of the Third Party
                                    Claim in accordance with 6.11.3(b) above,
                                    (i) the Indemnified Party may retain
                                    separate co-counsel at its sole cost and
                                    expense and participate in the defence of
                                    the Third Party Claim, and (ii) the
                                    Indemnifying Party will not consent to the
                                    entry of any judgment or enter into any
                                    settlement with respect to the Third Party
                                    Claim if such judgment or settlement is
                                    likely to establish a precedential custom or
                                    practice materially adverse to the
                                    continuing business aspects of the
                                    Indemnified Party or otherwise have a
                                    material adverse effect on the Indemnified
                                    Party for periods beginning on or after, or
                                    including, the date of Completion without
                                    the prior written consent of the Indemnified
                                    Party;

                           (d)      in the event of any of the conditions in
                                    6.11.3(b) above is or becomes unsatisfied,
                                    (i) the Indemnified Party may defend
                                    against, and consent to the entry of any
                                    judgment or enter into any settlement with
                                    respect to, the Third Party Claim in any
                                    manner it reasonably may deem appropriate
                                    (and the Indemnified Party need not consult
                                    with ' or obtain any consent from, any
                                    Indemnified Party in connection therewith),
                                    (ii) the Indemnifying Party will reimburse
                                    the Indemnified Party promptly and
                                    periodically for the costs of defending
                                    against the Third Party Claim (including
                                    reasonable attorney's fees and expenses),
                                    and (iii) the Indemnifying Party will remain
                                    responsible for any adverse consequences the
                                    Indemnified Party may suffer resulting from,
                                    arising out of, relating to, in the nature
                                    of, or caused by the Third Party Claim to
                                    the fullest extent provided in this section.

                  6.11.4   the PEI Seller and the PEI Buyer shall:


                                       51

<PAGE>   52



                           (a)      each give the other prompt written notice of
                                    the receipt of any claim by any taxing
                                    authority that, if successful, may result in
                                    an indemnity payment pursuant to this
                                    sub-paragraph 6.11; and

                           (b)      each transmit to the other a written
                                    description reasonably detailing the nature
                                    of the claim, a copy of all papers served
                                    with respect to such claim and the basis of
                                    its claim for indemnification under this
                                    sub-paragraph 6.11;

                  6.11.5   the indemnity provided for in this sub-paragraph 6.11
                           shall be independent of any other indemnity provision
                           hereof and, anything in this Agreement to the
                           contrary notwithstanding, shall survive until the
                           expiration of the applicable statutes of limitation
                           (including extensions thereof) for the Taxes referred
                           to herein and any Taxes subject to indemnification
                           under this section shall not be subject to any
                           maximum limit. Anything in this Agreement to the
                           contrary notwithstanding, the PEI Seller shall have
                           no liability under this subparagraph 6.11 or
                           otherwise for Taxes imposed on PEI (or any other
                           entity which, after Completion, is an affiliate
                           thereof) for any taxable year or taxable period
                           commencing after Completion.

         6.12     Certain Tax Information:

                  6.12.1   after Completion, the PEI Buyer and PEI Seller:

                           (a)      shall provide, or cause to be provided, to
                                    and by each other and each other's
                                    respective subsidiaries, affiliates,
                                    officers, employees and representatives,
                                    such assistance as may reasonably be
                                    requested by any of them in connection with
                                    the preparation of any Tax Return, the
                                    conduct of any audit or the defence of any
                                    litigation or other proceeding with respect
                                    to any Tax liability of PEI for any period
                                    prior to, including or ending after
                                    Completion; and

                           (b)      shall retain, or shall cause to be retained,
                                    for the appropriate period any records or
                                    information which may be relevant to any
                                    such return of audit. The assistance
                                    provided for in this subparagraph 6.12 shall
                                    include providing, or causing to be
                                    provided, such information as might
                                    reasonably be expected to be of use in
                                    connection with any such return, audit,
                                    litigation or proceeding, including, without
                                    limitation, records, returns, schedules,
                                    documents, work papers, opinions, letters,
                                    memoranda or other relevant materials
                                    relating thereto. All such materials and
                                    information shall be held in confidence by
                                    the recipient thereof and shall not be
                                    disclosed by the recipient in any manner
                                    whatsoever and shall not be used by the

                                       52

<PAGE>   53



                                    recipient other than in connection with such
                                    return, audit or litigation without the
                                    written consent of the supplier of the
                                    information, except as required by law. 'the
                                    party requesting the assistance provided for
                                    in this sub-paragraph 6.12 shall reimburse
                                    the party whose assistance is requested for
                                    reasonable out-of-pocket costs (including
                                    compensation of employees who provide such
                                    assistance outside of their regular working
                                    hours) incurred by it in providing such
                                    assistance and shall bear all costs or
                                    expenses incurred in connection with the
                                    provision of such assistance by any outside
                                    representatives or consultants (other than
                                    any such out-of-pocket or other costs or
                                    expenses subject to any indemnification
                                    hereunder). The term "audit" as used in this
                                    sub-paragraph 6.12 shall include any
                                    inquiry, examination or other conduct of any
                                    taxing authority or any judicial or
                                    administrative proceedings.

                  6.12.2   the PEI Seller shall prepare and timely file a
                           consolidated federal income Tax Return for the
                           taxable period commencing 1 April 1997 and ending on
                           Completion with respect to PEI and shall pay all
                           federal income Taxes due with respect to PEI for such
                           period. The PEI Buyer or PEI shall prepare and file
                           (or cause to be prepared and filed) all other Tax
                           Returns to be filed by PEI after Completion and shall
                           pay all Taxes due thereunder.

6.5      In paragraph 7.1.1(c), the reference to the United Kingdom shall be to
         the United States. In paragraph 7.1.2 the words "with the exception of
         the Property" shall be deleted.

6.6      Paragraph 7.3 shall be inapplicable.

6.7      Information required by paragraphs 7.5.3 and 7.6 shall be as of a date
         not more than 10 days prior to Completion.

6.8      Paragraph 8.2 shall not require disclosure of any claims for less than
         $25,000.

6.9      In paragraphs 10.3 and 10.4 the currency references shall be $125,000.

6.10     In paragraph 12.1.2 the currency reference shall be $40,000.

6.11     Paragraphs 15.3 and 15.4 shall be read as follows with respect to PEI:

         "No voluntary or involuntary proceeding has been commenced by or
         against PEI under any federal or state bankruptcy or insolvency law."

6.12     Paragraph 15.8 shall be inapplicable.


                                       53

<PAGE>   54



6.13     Paragraph 16.1 shall be inapplicable.

6.14     Paragraph 17 shall read as follows with respect to PEI:

         "PENSIONS AND OTHER BENEFITS

         17.1     Except for the plans, policies or arrangements listed in the
                  Disclosure Letter, which includes all plans, policies and
                  arrangements maintained by a Controlled Group member in the
                  past or present (hereinafter referred collectively to as the
                  "Plans" and individually as a "Plan"), no member of the
                  Controlled Group (as defined below), directly or indirectly,
                  maintains, sponsors or has any obligation or liability with
                  respect to any "employee benefit plan", as defined in section
                  3(3) of the Employment Retirement Income Security Act of 1974,
                  as amended ("ERISA"), any fringe benefit plan, any equity
                  compensation plan or arrangement, any plan, policy or
                  arrangement for the provision of executive compensation,
                  incentive benefits, bonuses or severance benefits, collective
                  bargaining agreement, cafeteria plan or split-dollar insurance
                  arrangement, or any other plan, policy or arrangement for the
                  provision of employee benefits. For the purposes of this
                  Paragraph 17, "Controlled Group" shall mean PEI, and any
                  person, entity or trade or business, whether or not
                  incorporated, which is required to be aggregated with PEI
                  under section 414(b), (c), (m) or (o) of the Code.

         17.2     No Plan is subject to Title IV of ERISA, no Plan is a part of
                  a "multiple employer welfare arrangement" within the meaning
                  of section 3(40) of ERISA, and no Plan is a multi-employer
                  plan within the meaning of section 4001(a)(3) of ERISA or
                  section 414(f) of the Code or a multi-employer plan described
                  in clauses (i) and (ii) of section 3(37)(A) of ERISA.

         17.3     With respect to each Plan identified in the Disclosure Letter
                  with respect to Warranty No. 17:

                  17.3.1   the Plan, each Controlled Group Member, each employee
                           of any Controlled Group Member and, to the best
                           knowledge o the PEI Seller, the other fiduciaries and
                           administrators of the Plan have at all times complied
                           in all respects with applicable requirements of law
                           (including, without limitation, the Code and ERISA)
                           that relate to the Plan and, with respect to the
                           Plan, there are no ongoing audits or investigations
                           by any governmental agency. There are no actions,
                           suits or claims (other than routine claims for
                           benefits) pending or threatened against the Plan, the
                           assets of the Plan, a Controlled Group Member, any
                           employee, officer or director of a Controlled Group
                           Member with respect to a Plan or, to the best
                           knowledge of the PEI Seller, against any other
                           trustee, fiduciary or administrator of the Plan;


                                       54

<PAGE>   55



                  17.3.2   if the Plan provides health, accident or medical
                           benefits:

                           (a)      the Plan sponsor and administrator have
                                    complied in all respects with the
                                    requirements of Part 6 of Subtitle B of
                                    Title I of ERISA and section 4980B of the
                                    Code (herein collectively referred to as
                                    "COBRA"); and

                           (b)      the Plan does not provide for non-terminable
                                    or non-alterable health, accident, medical
                                    or life benefits for employees, former
                                    employees, dependents, beneficiaries or
                                    retirees, except as otherwise required by
                                    COBRA, and then only to the extent the
                                    person pays the "applicable premium" (as
                                    defined- in Code section 4980B(f)(4)) for
                                    such coverage, or otherwise pays the full
                                    costs of such coverage;

                  17.3.3   full payment has been made of all amounts which a
                           Controlled Group Member is required, under applicable
                           law or under the Plan, to have paid as a contribution
                           or a benefit. The liability of each Controlled Group
                           Member with respect to each Plan has been fully
                           funded based on reasonable and proper actuarial
                           assumptions, has been fully insured, or has been
                           fully reserved for on its financial statements. No
                           changes have occurred or are expected to occur that
                           would cause an increase in the cost of providing
                           benefits under the Plan;

                  17.3.4   the consummation of the transactions contemplated by
                           the Agreement will not:

                           (a)      entitled any current or former employee or
                                    officer of the Corporation to severance pay,
                                    unemployment compensation or any other
                                    similar payment from PEI;

                           (b)      except as contemplated under sub-paragraph
                                    17.3.5 below, accelerate the time of payment
                                    or vesting under the Plan;

                           (c)      increase the amount of compensation due any
                                    such employee or officer;

                           (d)      directly or indirectly cause the Corporation
                                    to transfer or set aside any assets to fund
                                    or otherwise provide for the benefits under
                                    the Plan for any current or former employee,
                                    officer or director; or

                           (e)      result in any non-exempt prohibited
                                    transaction described in ERISA section 406
                                    or Code section 4975; and


                                       55

<PAGE>   56



                  17.3.5   with respect to each Plan identified on the
                           Disclosure Letter that is an "employee pension
                           benefit plan", as defined in section 3(2) of ERISA
                           and is funded or required to be funded under ERISA or
                           is intended to be qualified under section 401(a) of
                           the Code:

                           (a)      the Plan and any associated trust
                                    operationally comply with the applicable
                                    requirements of Code section 401(a);

                           (b)      the Plan and any associated trust have been
                                    amended to comply with all such requirements
                                    as currently in effect, other than those
                                    requirements for which a retroactive
                                    amendment can be made within the "remedial
                                    amendment period" available under Code
                                    section 401(b) (as extended under Treasury
                                    Regulations and other Treasury
                                    pronouncements upon which taxpayers may
                                    rely);

                           (c)      the Plan and any associated trust have
                                    received a favorable determination letter
                                    from the Internal Revenue Service stating
                                    that the Plan qualifies under Code section
                                    401(a), that the associated trust qualifies
                                    under Code section 501(a) and, if
                                    applicable, that any cash or deferred
                                    arrangement under the Plan qualifies under
                                    Code section 401(k), unless the Plan was
                                    first adopted at a time for which the
                                    above-described "remedial amendment period"
                                    has not yet expired, and

                           (d)      no contribution made to the Plan is subject
                                    to an excise tax under Code section 4972.

                  17.3.6   with respect to the Fluid Systems Corporation 401(k)
                           Plan (the "401(K) Plan"), the PEI Seller will either
                           (a) terminate and liquidate the 401(k) Plan or (b)
                           spin off that portion of the 401(k) Plan attributable
                           to individuals actively employed by PEI on the
                           Business Day that follows Completion, into a separate
                           plan entity (the "PEI 401(K) Plan"), and terminate
                           the PEI 401(k) Plan. The PEI Buyer agrees that
                           employees of PEI as of the Business Day that follows
                           Completion who have account balances under either the
                           401(k) Plan or the PEI 401(k) Plan will be permitted
                           to take direct ro over distributions to the WaterLink
                           Management, Inc., 401(k) Plan upon confirmation that
                           the United States Internal Revenue Services has
                           issued a favorable determination letter with respect
                           to the termination of the PEI 401(k) Plan and the
                           401(k) Plan. Further, the PEI Seller and the PEI
                           Buyer agree to co-operate with respect to the
                           foregoing transaction and each agree to provide any
                           information and assistance to the other that is
                           reasonably requested in connection with the foregoing
                           transactions.


                                       56

<PAGE>   57



6.15     Paragraph 19 shall read as follows with respect to PEI:

         "PEI will not at Completion be a party to any arrangement or agreement
         (whet er or not legally binding) with Anglian Water plc or any
         subsidiary pursuant to which goods or services are provided or
         received, with the extension of guarantees and letters of credit
         provided for PEI's benefit."

6.16     Paragraph 20.1 through to 20.3 shall read as follows with respect to 
         PEI:

         "PEI has operated its business in compliance with its certificate of
         incorporation and by-laws in all material respects. The minutes books
         of PEI contain accurate records of all formal actions taken by the
         board of directors of PEI for the period during which the PEI Seller
         has owned PEI. PEI's minute books for 1988 and prior years are
         incomplete."

6.17     Neither PEI nor the PEI Buyer will be subject to any loss or damage
         arising by reason of any breach or alleged breach of any provision of
         any contract for the provision of goods or services by PEI prior to
         Completion excluding, however, any such claim for any breach or alleged
         breach of any contract listed in Schedule 8 hereto. PEI will provide,
         without charge, management assistance that the PEI Seller may
         reasonably request after Completion in resolving any claim for any such
         breach or alleged breach.

6.18     To the best knowledge of the PEI Seller PEI is not at the date hereof
         in material breach, nor has any breach been alleged, of any contract
         listed in Schedule 8.



                                       57

<PAGE>   58



                                   SCHEDULE 4

                              GUARANTEED CONTRACTS
<TABLE>
<CAPTION>

- ------------------------------------------------------------------------------------------------------------------------------------
 ARRANGEMENT DATE    BANK BONDS     $            PARENT      EXPIRY DATE             BENEFICIARY'S NAME       CONTRACT
                                                COMPANY
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                 <C>          <C>           <C>         <C>               <C>                             <C>       
19 January 1994                  116,454.20                19 January 1997   Sir William Halcrow & Partners  Venezuela
26 June 1994         13,169.00                                               NRA - Severn Trent Region       Pillings
23 December 1994     25,936.00                             31 December 1998  Ebara UK Ltd                    Ebara
4  July 1996         46,418.00                              4 July 1997      Mid Kent Water                  Trosley WTW
21 November 1996      6,941.75                             25 July 1998      Biwater International Ltd       Vathia Gonia
26 June 1997        182,436.88                             31 August 1998    Environment Agency              Welmore Lake
21 December 1997    364,872.00                             31 August 1998    Environment Agency              Welmore Lake
17 November 1997                                8,307.00   21 November 1998  Wabag Water Engineering         Canterbury
26 September 1994                              28,053.00                     NRA - Severn Trent Region       Edmonsey Sluice
28 January 1998       4,523.30                             20 March 2000     Ebara UK Ltd                    Kassabi Pumping Station
28 January 1998      18,452.10                             20 March 2000     Ebara UK Ltd                    Baloza Pumping Station
2  February 1998                              385,570.00   12 June 1999      Environment Agency              Northampton Flood
                                                                                                             Alleviation Scheme
- ------------------------------------------------------------------------------------------------------------------------------------
                    662,749.03   116,454.20   421,930.00
                 ------------------------------------------  
</TABLE>


                                       58

<PAGE>   59



                                 PEI GUARANTEES
<TABLE>
<CAPTION>

- -----------------------------------------------------------------------------------------------------------------------------
REF.          BENEFICIARY    FROM                FACILITY               CURRENCY           AMOUNT  EXPIRY DATE
- -----------------------------------------------------------------------------------------------------------------------------
<S>           <C>            <C>                 <C>                    <C>             <C>        <C> 
PLC 22        SHB            1 December 1993     Letter of Credit       USD                60,000  8 September 1998

PLC 22        SHB            1 December 1993     Line of Credit         USD                99,328  15 August 1998

PLC 84        Pizzagall      24 October 1994     Guarantees             USD             4,967,000  On completion of contract
- -----------------------------------------------------------------------------------------------------------------------------
</TABLE>


                                       59

<PAGE>   60



                                   SCHEDULE 5

                              PENSION ARRANGEMENTS


1.       INTERPRETATION

1.1      In this Schedule the following words and expressions shall, unless the
         context otherwise requires, have the following meanings:

         "Actuary's Letter" means the letter from the Sellers' Actuary to the
         Buyers' Actuary (in the agreed form annexed hereto) and as the same has
         been agreed between the Sellers' Actuary and the Buyers' Actuary;

         "the Adjusted Funding Requirement" means the amount calculated in
         accordance with paragraph 4.2;

         "Appropriately Adjusted" means adjusted during the specified period as
         follows:-

         (a)      in respect of the period from the beginning of the specified
                  period to but excluding the day three days before the end of
                  the specified period in proportion to the change in the value
                  of the relevant sum or amount which would have occurred if at
                  the beginning of that period 90% thereof had been invested in
                  shares represented by the Financial Times Actuaries All Share
                  Total Return Index and 10% thereof had been invested in stocks
                  represented by the Financial Times - Actuaries British
                  Government Over 15 Year Index with gross interest reinvested
                  daily in the same stocks; and

         (b)      in respect of the period from and including the three days
                  before the end of the specified period to the end of the
                  specified period, by the addition of compound interest at the
                  base lending rate from time to time of Lloyds Bank plc
                  accruing daily;

         "Approval" means approval by the Board of Inland revenue as an exempt
         approved scheme for the purposes of Chapter I of Part XIV of the Taxes
         Act;

         "The Assumptions" means the actuarial methods and assumptions set out
         in the Actuary's Letter as the same have been agreed between the
         Sellers' Actuary and the Buyers' Actuary;

         "The Buyers' Actuary" means Stephen Lowry, F.I.A. of Messrs Gissings of
         Finsbury House, 23 Finsbury Circus, London EC2M 7AL or such other
         actuary as may be appointed by the Buyer for the purposes of this
         Schedule;

         "The Buyers' Scheme" means the retirement benefits scheme or schemes to
         be nominated by the Buyer in accordance with paragraph 3.2;

                                       60

<PAGE>   61



         "the Completion Date" means the date on which Completion will take 
         place;

         "the Consenting Members" means those Transferring Members whose consent
         or request in writing (in a form submitted to and approved by the
         trustees of the Sellers' Schemes in advance of its issue) to or for a
         payment or transfer of assets from the Sellers' Schemes to the Buyers'
         Scheme in respect of the benefits (including accrued rights to
         guaranteed minimum pensions (within the meaning of the Pensions Act))
         which have accrued to and in respect of them under the Sellers' Schemes
         up to the Membership Transfer Date has been received by the trustees of
         toe Sellers' Schemes not later than the date which is two months after
         the Membership Transfer Date and is not withdrawn prior to the Payment
         Date;

         "the Funding Requirement" means the amount which is equal to the
         aggregate value as at the Completion date of the benefits (including
         all benefits secured by voluntary contributions made by Consenting
         Members which are not money purchase benefits and excluding any
         enhancement of pensionable service $ranted on ill-health retirement or
         death in service and any lump sum benefit payable on death in service)
         prospectively and contingently payable from the Seller's Scheme$ in
         accordance with the provisions of the Sellers' Schemes in respect of
         the Consenting Members at the Membership Transfer Date calculated by
         reference to their pensionable service up to the Completion Date and a
         projection from the Completion Date of their pensionable earnings at
         the Completion Date and using the Assumptions (including the assumption
         that their pensionable earnings shall increase during the period from
         the Completion Date to their normal pension date under the Sellers'
         Schemes or earlier assumed date of death, retirement or other cessation
         of pensionable service);

         "the Member Employees" means those employees of the Company who are
         members of the Sellers' Schemes at the Completion Date;

         "the Membership Transfer Date" means the date which is twelve months
         after the Completion Date or such earlier date as may be agreed in
         writing between the Seller and the Buyer;

         "the Payment Date" means the date on which the trustees of the Sellers'
         Schemes make the payment to the trustees of the Buyers' Scheme in
         accordance with paragraph 5;

         "the Pensions Act" means the Pensions Act 1995;

         "the Sellers' Actuary" means M A Webb, FIA of Messrs Bacon & Woodrow of
         Parkside House, Ashley Road, Epsom, Surrey KT18 5BS or such other
         actuary as may be appointed by the Seller for the purposes of this
         Schedule;

         "the Sellers' Schemes" means the Anglian Water Pension Scheme and the
         Anglian Water Mirror Image Pension Scheme or either of these as the
         context may require and any

                                       61

<PAGE>   62



         retirement benefit scheme with or capable of obtaining Approval which
         shall result from the amalgamation of the Sellers' Schemes;

         "the Transferred Amount" means the aggregate amount which is paid or
         transferred by the trustees of the Sellers' Schemes to the trustees of
         the Buyers' Scheme but excluding so much (if any) thereof as shall be
         certified by the trustees of the Sellers' Schemes as deriving from
         voluntary contributions to which paragraph 6 relates;

         "the Transferring Members" means those Member Employees who become
         members of the Buyers' Scheme with effect from the Membership Transfer
         Date and who immediately before becoming members of the Buyers' Schekne
         are members of the Sellers' Schemes;

         "the Transitional Period" means the period commencing on the day
         immediately following the Completion Date and ending on the day
         immediately preceding the Membership Transfer Date (both days
         inclusive).

1.2      For the purposes of this Schedule "Buyer" shall mean "AES Buyer" and
         "Seller" shall mean "AES Seller" and "Company" shall mean "AES".

1.3      References to paragraphs are to paragraphs of this Schedule.

1.4      Headings in this Schedule are for ease of reference only and $hall not
         affect the interpretation of any provision.

2.       TRANSITIONAL PERIOD

2.1      The Seller and the Buyer shall use their best endeavors to procure the
         inclusion of the Buyer as a participating employer in the Sellers'
         Schemes during the Transitional Period in respect of the Member
         Employees subject to the Approval of the Sellers' Schemes not being
         prejudiced thereby.

2.2      The Buyer undertakes that during the Transitional Period:-

         2.2.1    it will pay to the trustees of the Sellers' Scheme the
                  contributions to be made to the Sellers' Scheme by and in
                  respect of the Member Employees at the following rates:-

                  by the Buyer - (i) in the case of Member Employees of the
                  Anglian Water Pension Scheme: 8.0% of Pensionable Pay for
                  members contributing 3% of Pensionable Pay; 12.3% of
                  Pensionable Pay for members contributing 5% of Pensionable Pay
                  and 12.4% for members contributing 6% of Pensionable Pay and
                  (ii) in the case of Member Employees of the Anglian Water
                  Mirror Image Pension Scheme: 15.2% of Pensionable Earnings for
                  members contributing 5% of Pensionable Earnings and

                                       62

<PAGE>   63



                  13.4% of Pensionable Earnings for members contributing 6% of
                  Pensionable Earnings;

                  by members - 6%, 5% or 3% of Pensionable Pay or Pensionable
                  Earnings as appropriate to the individual under the Rules of
                  the Sellers' Scheme;

                  and it will comply in all respects (other than in relation to
                  the payment of contributions) with the provisions of the
                  Sellers' Schemes and for the avoidance of doubt the terms
                  Pensionable Earnings and Pensionable Pay shall have the
                  meanings ascribed to them in the trust deed and rules
                  governing the Sellers' Schemes;

         2.2.2    it will meet all and any costs that may fall either on the
                  Seller or the Principal Employer (as the same is defined in
                  the Sellers' Schemes) the Trustees of the Sellers' Schemes
                  consequent upon any Member Employee taking early retirement
                  (being retirement prior to the earliest age at which the
                  Member Employee is entitled to immediate unreduced benefits as
                  of right) between Completion Date and the end of the
                  Transitional Period such costs to be agreed between the
                  Buyers' Actuary and the Sellers' Actuary using assumptions
                  consistent with those in the Actuary's letter;

         2.2.3    it will not exercise its discretion to allow or permit early
                  retirement on grounds of ill-health without the written
                  consent of the Seller such consent not to be unreasonably
                  withheld;

         2.2.4    it will make all necessary arrangements with the Co-operation
                  of the Seller to obtain separate contracting-out certificates
                  (within the meaning of the Pensions Act) in respect of the
                  participation of the Buyer in the Sellers' Schemes in respect
                  of the Member Employees and to cancel those contracting-out
                  certificates with effect from the day immediately preceding
                  the Membership Transfer Date;

         2.2.5    it will not do or omit to do any act or thing whereby the
                  Approval of the Sellers' Schemes or their status as a
                  contracted-out scheme would or might be prejudiced; and

         2.2.6    it will not exercise any right, power or discretion conferred
                  on it by the Sellers' Schemes except on such terms (whether as
                  to payment or additional contributions or otherwise) as the
                  Seller may require.

         2.3      The Buyer undertakes that if the Pensionable Pay or
                  Pensionable Earnings (as defined for the purposes of the
                  Sellers' Schemes) of any Member Employee who does not become a
                  Consenting Member is increased by more than 6.5% per annum
                  before the Membership Transfer Date the Buyer shall pay such
                  additional contribution to the Sellers' Schemes as the Seller
                  or the trustees of the Sellers' Schemes may reasonably
                  require.

                                       63

<PAGE>   64



         2.4      The Buyer and the Seller will do all such things and execute
                  all such documents and generally use their reasonable
                  endeavors to procure the implementation of the agreement set
                  out in this Schedule.

3.       THE BUYERS' SCHEME

3.1      The Buyer shall arrange for those Member Employees who are still in its
         employment to be offered within nine months of the Completion Date
         membership of the Buyers' Scheme with effect on and from the Membership
         Transfer Date on terms which satisfy the requirements of paragraph 3.3
         (such offer of membership to be in writing in a form disclosed at least
         two weeks in advance of issue by the Buyer to the trustees of the
         Sellers' Schemes who shall have an opportunity to comment upon the form
         and whose reasonable comments shall be incorporated) and for those
         Member Employees who accept such offer of membership and who are still
         in its employment on the Membership Transfer Date to be admitted to
         membership of the Buyers' Scheme with effect on and from the Membership
         Transfer Date in accordance with the terms of the offer of membership.

3.2      The Buyer undertakes to nominate a retirement benefits scheme on or
         before the Membership Transfer Date which shall:

         3.2.1    be or be intended to be in receipt of Approval;

         3.2.2    be or be intended to be a scheme providing salary related
                  benefits which is contracted-out for the purposes of Part III
                  of the Pensions Act on the basis of providing benefits which
                  equal or exceed those set out in Sections 12A and 12B of the
                  Pensions Act;

         3.2.3    provide (inter alia) benefits on the basis described in 
                  paragraph 3.3;

         and the Buyer shall use its best endeavors to procure that the trustees
         or managers of the Buyers' Scheme shall be able and willing to accept
         the transfer to the Buyers' Scheme of the accrued rights of the
         Consenting Members under the Sellers' Schemes.

3.3      The Buyer undertakes to the Seller to procure that the Buyers' Scheme
         shall (subject to receipt by the trustees of the Buyers' Scheme of the
         Adjusted Funding Requirement in full and Inland Revenue limits on
         benefits not being exceeded) provide benefits for and in respect of
         Consenting Members on a basis which for service before the Membership
         Transfer Date is in the agreed opinion of the Sellers' Actuary and
         Buyers' Actuary substantially the same as and no less favorable overall
         than the basis of the benefits for such service to which the Consenting
         Members would be entitled under the Sellers' Schemes at the Completion
         Date on the basis of the Assumptions TOGETHER WITH the benefit of any
         improvements or increases in Sellers' Schemes benefits made by the
         Principal Employer (as the same is defined in the Sellers' Schemes)
         and/or the Trustees of the Sellers' Schemes between the

                                       64

<PAGE>   65



         Completion Date and the Membership Transfer Date. In comparing the
         bases of benefits referred to in this paragraph an appropriate
         adjustment shall be made if any benefits are retained in the Sellers'
         Schemes in respect of any of the Consenting Members or if a state
         scheme premium (within the meaning of the Pensions Act) is paid by the
         trustees of the Sellers' Schemes in respect of a Consenting Member.

3.4      The Buyer undertakes to procure that the amount transferred to the
         Buyers' Scheme under paragraph 5 and any amount payable under paragraph
         7 will, so far as can reasonably be achieved without maintaining or
         identifying such amounts as a separate fund and subject only to the
         need to retain Approval of the Buyers' Scheme, be applied under the
         Buyers' Scheme exclusively in the provision of benefits for and in
         respect of the Consenting Members in respect of their pensionable
         service completed prior to the Membership Transfer Date.

4.       CALCULATION OF THE ADJUSTED FUNDING REQUIREMENT

4.1      As soon as practicable after the Membership Transfer Date the Seller
         shall instruct the Sellers' Actuary to calculate the Funding
         Requirement and when the Payment Date has been determined the Adjusted
         Funding Requirement and the Buyer shall instruct the Buyers' Actuary to
         consult with the Sellers' Actuary for the purpose of checking and
         agreeing the method of calculation and the calculation by the Sellers'
         Actuary of the Funding Requirement and the Adjusted Funding
         Requirement.

4.2      The Adjusted Funding Requirement shall be the aggregate of:

         4.2.1    the Funding Requirement Appropriately Adjusted in respect of
                  the period from the Completion Date to but excluding the
                  Payment Date;

         PLUS

         4.2.2    an amount equal to the contributions paid after the Completion
                  Date to the Sellers' Schemes by and in respect of the
                  Consenting Members (except voluntary contributions to which
                  paragraph 6 relates and a management charge of 0.5% of
                  Pensionable Pay or Pensionable Earnings) with each such
                  contribution being Appropriately Adjusted from the date of
                  receipt thereof by the trustees of the.
                  Sellers' Scheme to but excluding the Payment Date;

         LESS

         4.2.3    an amount equal to the notional cost of insuring during the
                  Transitional Period all benefits payable under the Sellers'
                  Scheme which relate to an enhancement of pensionable service
                  on ill-health retirement or death in service or a lump sum on
                  death in service which is attributable to Consenting Members
                  calculated as 2% of

                                       65

<PAGE>   66



                  Pensionable Pay or 4% of Pensionable Earnings (as appropriate)
                  of the Consenting Members. Appropriately Adjusted in respect
                  of the period from the date on which it is deemed to have been
                  incurred to but excluding the Payment Date;

         LESS

         4.2.4    an amount equal to the value as at the Membership Transfer
                  Date of any benefits in respect of the Consenting Members
                  liability for which is not transferred from the Sellers'
                  Schemes to the Buyers' Scheme. The value of each such benefit
                  shall be calculated by the Sellers' Actuary and agreed by the
                  Buyers' Actuary using the same assumptions (including the
                  assumption that earnings shall increase) as are used for the
                  calculation of the Funding Requirement and the value of each
                  such benefit shall be Appropriately Adjusted in respect of the
                  period from and including the Membership Transfer Date to but
                  excluding the Payment Date.

5.       PAYMENT FROM THE SELLERS' SCHEMES

         The Seller shall use its best endeavors to procure that subject to:

         5.1.1    the trustees of the Sellers' Schemes being satisfied that the
                  requirements of paragraph 3 have been or will be satisfied;

         5.1.2    if the trustees of the Sellers' Schemes are required to obtain
                  Inland Revenue consent before making a transfer of assets to
                  the Buyers' Scheme, such consent having been received by the
                  trustees of the Sellers' Schemes;

         5.1.3    completion of a trustee transfer agreement in a form agreed in
                  advance by the trustees of the Buyers' Scheme and the trustees
                  of the Sellers' Schemes;

         the trustees of the Sellers' Schemes shall within 14 days of agreeing
         the Funding Requirement or its being agreed in accordance with
         paragraph 8 and (so far as is practicable using a reasonable estimate
         of the Payment Date) the Adjusted Funding Requirement offer to the
         trustees of the Buyers' Scheme an amount equal to the Adjusted Funding
         Requirement in the form of cash or if the Buyer agrees (i) noncash
         assets offered and selected by the trustees of the Sellers' Schemes or
         (ii) partly in cash and partly in the form of non-cash assets
         (similarly selected) in full and final satisfaction of the interests of
         the Consenting Members under the Sellers' Schemes (other than the
         interests to which paragraph 6 applies).

6.       ADDITIONAL VOLUNTARY CONTRIBUTIONS

         Any voluntary contributions made under the Sellers' Schemes for the
         purpose o securing additional retirement benefits on a money purchase
         basis and the investments or monies representing such contributions and
         any income derive therefrom shall be disregarded for the

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<PAGE>   67



         purposes of calculating the Funding Requirement. The Seller will,
         nevertheless, use its best endeavors to procure that on the Payment
         Date the trustees of the Sellers' Schemes pay or transfer to the
         trustees of the Buyers' Scheme (or procure the payment or transfer to
         the trustees of the Buyers' Scheme) the amount of any voluntary
         contributions of the Consenting Members under the Sellers' Schemes
         together with accumulated bonuses or investment return thereon and the
         Buyer shall use its best endeavors to procure that the trustees of the
         Buyers' Scheme apply that amount in the provision of additional
         benefits under the Buyers' Scheme for and in respect of the Consenting
         Members who had so contributed. The trustees of the Sellers' Schemes
         shall certify to the trustees of the Buyers' Scheme how much (if any)
         of the assets transferred derive from the voluntary contributions paid
         by the Consenting Members,

7.       ADJUSTMENT PAYMENT

7.1      In the event of the Transferred Amount (together with any realisation
         costs if the payment is made in cash) is less than the Adjusted Funding
         Requirement calculated as at the Payment Date and all the requirements
         set out in paragraph 5 have been met the Seller shall instruct the
         Sellers' Actuary to certify to the Buyer the amount of the difference
         (such amount being referred to in this sub-paragraph as "the
         shortfall") and the Seller shall pay or procure to be paid to the Buyer
         or as the Buyer may direct an amount equal to the shortfall
         Appropriately Adjusted in respect of the period from and including the
         Payment Date to but excluding the date of payment in accordance with
         this sub-paragraph.

7.2      If the Buyer or Buyers' Group Company (which shall have the moaning
         given to it in the Agreement) obtains for the accounting period in
         which the shortfall is paid by the Seller under paragraph 7.1 or in any
         of the four succeeding accounting periods a deduction for part (or the
         whole) of the shortfall which result$ in a reduction in taxable profits
         for the purposes of corporation tax either as an expense of the
         applicable accounting period or as an expense of a subsequent
         accounting period in respect of the shortfall made in one or more of
         the preceding accounting periods or by virtue of a trading loss created
         in whole or in part by the shortfall being carried forward against
         future profits of the Buyers' trade resulting in a reduction in taxable
         profits then the Buyer shall pay to the Seller an amount equal to the
         amount by which the shortfall reduces the said taxable profits
         multiplied by the marginal rate of tax applicable to the Buyer or the
         applicable member of the Buyers' Group (as the case may be) for the
         accounting period in which the deduction is Obtained or the loss
         utilised (such payment shall be made by the Buyer forthwith upon the
         later or (i) the date on which the tax would otherwise have been paid
         if it had not been for the said reduction in taxable profits and (ii)
         the amount of reduction being certified by the auditor of the Buyer or
         the applicable member of the Buyers' Group, which certification the
         Buyer shall procure is made at the earliest reasonable practicable
         opportunity, each accounting period being dealt with separately).


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<PAGE>   68



         For this purpose, a reduction in taxable profits includes not only a
         reduction in the taxable profits of the company obtaining a reduction
         in taxable profits but also a reduction in the taxable profits of any
         member of any group or consortium to which any loss attributable to
         such payment is surrendered by way of group relief or consortium relief
         in accordance with the provisions of sections 402 to 413 of the Taxes
         Act to a member of the Buyers' Group (but, for the avoidance of doubt,
         this does not include the increasing of a net loss for corporation tax
         purposes in an accounting period).

7.3      The Buyer shall use all reasonable endeavors to procure that such a
         deduction as is described in paragraph 7.2 is obtained in the earliest
         possible accounting period.

8.       DISPUTES

         Any dispute between the Seller and the Buyer or between the Sellers'
         Actuary and the Buyers' Actuary covering the calculation of the Funding
         Requirement or any element of the Adjusted Funding Requirement or any
         of the matters to be agreed by them under the provisions of this
         Schedule shall in the absence of agreement between them be referred to
         an independent actuary, agreed between the Seller and the Buyer within
         10 days of the issue of such a reference first being raised or failing
         such agreement, appointed at the request of either the Seller or the
         Buyer by the President for the time being of the Institute of Actuaries
         who shall act as an expert and not as an arbitrator and whose decision
         shall be final and binding on the parties and whose expenses shall be
         borne equally by the Seller and the Buyer or otherwise as the expert in
         his absolute discretion may determine.



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                                   SCHEDULE 6

                     REGISTERED INTELLECTUAL PROPERTY RIGHTS


PATENTS

British Patent No: 2242372 for Wedge Wire D Screen dated 25 March 1991.


LICENCES

1.       Manufacture and supply of Black Box Sewage Treatment Unit for the
         Domestic Sewage Market from the AES Seller dated 9 April 1997.

2.       Manufacture and supply of Dekoda Deodorising Unit for the Domestic
         Sewage Market from AW Licensing Limited dated 29 July 1997.

3.       Step Screen etc. as provided for in the International Distributor
         Agreement with Hydropress Wallander & Co AB dated 1 March 1997.

4.       General Industrial Property Rights as provided for in the Distribution
         Agreement with Picatech AG dated 20 June 1994.

5.       Various trademarks (including "Waterlink") as provided for under the
         International Distributorship Agreement with Nordic Water Products AB
         and Zickert Products AB dated 5 December 1997.



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                                   SCHEDULE 7

                                  TAX INDEMNITY


1. DEFINITIONS

1.1 In this Schedule the following words have the meanings set out below.

         1.1.1    "Actual Liability To Taxation" means any liability of the
                  Company to make actual payment of (or of an amount in respect
                  of) Taxation.

         1.1.2    "Claim" means:

                  (a)      any letter, assessment, notice, demand or other
                           document issued or action taken by any Taxation
                           Authority; or

                  (b)      any action that the Company has to take as a result
                           of any Taxation legislation or requirement of the
                           relevant Taxation Authority,

         from which it appears that the Company is or may be or may become
         liable to any Liability to Taxation.

         1.1.3    "Effective Liability To Taxation" shall have the meaning given
                  in clause 2.4.

         1.1.4    "Event" includes any actual event, act, transaction or
                  omission or any deemed event, act, transaction or omission or
                  combination or series of such actual or deemed events, acts,
                  transactions or omissions whether or not the Company is a
                  party to it. Including (without limitation) the declaration,
                  payment or making of any dividend or other distribution, and
                  completion of the sale of the Shares to the AES Buyer pursuant
                  to the Agreement.

         1.1.5    "Liability To Taxation" means any Actual Liability to Taxation
                  and/or Effective Liability to Taxation and/or other payment
                  referred to in clause 3.

         1.1.6    "Non-Availability" includes in relation to a Relief the
                  reduction, modification, loss, claw-back, counteraction,
                  disallowance or cancellation of that Relief or right to
                  repayment of Taxation or a failure to obtain a Relief or to
                  receive the benefit of a right to repayment o Taxation to
                  which the Company was or reasonably assumed it was entitled.

         1.1.7    "Relief" means any loss, relief, allowance, exemption, credit,
                  set-off, charge or deduction or right to repayment of Taxation
                  in respect of any Taxation for the

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<PAGE>   71



                  purposes of computing income profits or gains for Taxation,
                  including (without limitation) losses within the meaning of
                  section 393 of the Taxes Act.

2.       INTERPRETATION

2.1      Reference to income or profits or gains, earned, accrued or received
         includes income or profits of gains deemed to have been, treated as or
         regarded as earned, accrued, received or otherwise arising for the
         purposes of any Taxation legislation.

2.2      Reference to a Claim for Taxation shall include any Claim whether made
         before or after the date of this Agreement (which has not been
         satisfied at that date).

2.3      There shall be excluded (without limitation) from the meaning of
         "ordinary course of business" any Event which results in or involves
         the following:

         2.3.1    any Taxation arising under Part VIII of the Taxes Management
                  Act 1970 (charges on non-residents);

         2.3.2    any Taxation arising under Part XVII of the Taxes Act (tax
                  avoidance);

         2.3.3    any Taxation arising in respect of any distribution (as
                  defined in Part VI of the Taxes Act) or deemed distribution;

         2.3.4    any Taxation arising in respect of the acquisition, disposal
                  or supply or deemed acquisition, disposal or supply of any
                  assets, goods, service or business facility of any kind
                  (including a loan of money or the letting, hiring or licensing
                  of any tangible or intangible property) for a consideration
                  deemed for Taxation purposes to be in excess of that (if any)
                  actually received or for a consideration deemed for Taxation
                  purposes to be less than that actually given;

         2.3.5    any Taxation arising in respect of a transaction which may
                  result in the Company or the AES Buyer becoming liable to pay
                  or bear Taxation chargeable directly or primarily against or
                  attributable directly or primarily to another person, firm or
                  company other than any Taxation which the Company has deducted
                  pursuant to the provisions of section 203 of the Taxes Act;

         2.3.6    any Taxation which the Company failed to deduct or which
                  arises as a result of a failure by the Company to deduct or
                  duly account for Taxation; and

         2.3.7    any Taxation arising from the disposal or acquisition or
                  deemed disposal or acquisition of any asset other than trading
                  stock for a consideration or deemed consideration in excess of
                  (pound)10,000.


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<PAGE>   72



2.4     Any reference to an "Effective Liability to Taxation" shall be construed
        as a reference to:

         2.4.1    the set-off of any Relief against any Actual Liability to
                  Taxation or against any income, profit or gains in respect of
                  which the Covenantors would, but for such set-off, have been
                  liable under clause 3.1 and, for the purposes of clause 3.1,
                  the amount of such an Effective Liability to

                  Taxation arising as a result of such set-off will be an amount
                  equal to the amount of Taxation saved as a result of the
                  Set-off; or

         2.4.2    the non-availability (in whole or in part) of any Relief taken
                  into account in computing any provision for current or
                  deferred Taxation in the Accounts and, for the purposes of
                  clause 3.1, the amount of such Effective Liability to Taxation
                  shall be:

                  (a)      if the Relief was a deduction from or set-off against
                           Taxation or a right to repayment of Taxation, the
                           amount of that Relief; or

                  (b)      in any other case, the amount of Taxation that would
                           have been saved but for such non-availability on the
                           assumption that the Relief was available and was
                           capable of being fully utilised and was so utilised
                           immediately prior to it becoming non-available.

2.5      Any reference to a "clause" shall be to a clause in this Schedule
         unless stated otherwise.

3.       COVENANTS

3.1      Subject as hereinafter provided the AES Seller hereby covenants to pay
         to the AES Buyer an amount equal to:

         3.1.1    any Actual Liability to Taxation resulting from or by 
                  reference to:

                  (a)      any income, profits or gains earned, accrued or
                           received on or before the date of this Agreement; or

                  (b)      any Event which occurred on or before such date or
                           was deemed to occur on or before such date for the
                           purposes of Taxation whether alone or in conjunction
                           with other such Events; or

                  (c)      the provisions of section 767A of the Taxes Act or
                           sections 179, 190 or 191 of the TCGA in relation to
                           corporation tax assessed on any company remaining
                           unpaid where the company in question is the AES
                           Seller or was under the control of the AES Seller; or

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<PAGE>   73



                  (d)      any Event occurring after Completion in pursuance of
                           a legally binding obligation or arrangement in either
                           case whether or not conditional incurred or entered
                           into on or before Completion;

         3.1.2    any Effective Liability to Taxation;

         3.1.3    any payment made by the Company, whether to a Taxation
                  Authority or not, where such payment is made between the Last
                  Accounting Date and Completion in respect of an Actual
                  Liability to Taxation that would have been a liability of the
                  AES Seller under clause 3.1.1 but for such payment;

         3.1.4    any reasonable costs and expenses properly incurred by the AES
                  Buyer and/or the Company in connection with any such Liability
                  to Taxation or in taking or defending any action under this
                  Schedule in respect of which the AES Buyer ultimately proves
                  successful;

         3.1.5    any liability of the Company to pay or repay an amount in
                  respect of Taxation under any agreement, indemnity, guarantee,
                  covenant, mortgage or charge or other contractual obligation
                  entered into on or before Completion; and

         3.1.6    any Liability to Taxation, and all reasonable costs and
                  expenses properly incurred by the AES Buyer and/or the Company
                  in connection with any such Liability to Taxation, which
                  arises as a direct consequence of:

                  (a)      the interim dividend of (pound)2,300,000 declared and
                           paid by the Company on 20th March 1998;

                  (b)      the issue and allotment of 2,300,000 Shares at par by
                           the Company to Anglian Water International Holdings
                           Limited on 23rd March 1998; and/or

                  (c)      the transfer of the Shares from Anglian Water
                           International Holdings Limited to the AES Seller on
                           24th March 1998.

3.2      In respect of payments made pursuant to the covenants contained within 
         this Indemnity:

         3.2.1    all sums payable by the AES Seller to the AES Buyer shall be
                  paid free and clear of all deductions, withholdings, set-off$
                  or counterclaims whatsoever save only as may be required by
                  law,

         3.2.2    if any deductions or withholdings are required by law to be
                  made from any sums, the AES Seller shall be obliged to pay the
                  AES Buyer such further amount as will, after the deduction or
                  withholding has been made, leave the AES Buyer with the same

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<PAGE>   74



                  amount as it would have been entitled to receive in the
                  absence of such requirement to make a deduction or
                  withholding; and

         3.2.3    if any sum payable by the AES Seller to the AES Buyer under
                  clause 3 (including clause 3.2.2 and this clause 3.2.3) shall
                  be subject to an Actual Liability to the Taxation in the hands
                  of the AES Buyer or would have been so subject but for the
                  availability of a Relief, the AES Seller shall pay to the AES
                  Buyer such further sum equal to such Actual Liability to
                  Taxation.

4.       EXCLUSIONS

4.1      The covenants by the AES Seller in clause 3.1 shall not apply to any 
         Liability to Taxation:

         4.1.1    to the extent that provision or reserve in respect of any
                  relevant Actual Liability to Taxation was taken into account
                  in computing any provision or reserve for current or deferred
                  Taxation in the Accounts;

         4.1.2    for which the Company is or may become primarily liable as a
                  result of transactions entered into in the ordinary course of
                  its business after the Last Accounting Date and before the
                  date of this Agreement; or

         4.1.3    in respect of which provision or reserve has been made in the
                  Accounts which is insufficient only by reason of any increase
                  in rates of Taxation made after the date of this Agreement.

4.2      The AES Seller shall not be liable in respect of any claim under this
         Indemnity or under any of the Tax Warranties to the extent that the
         claim arises or is increased as a consequence of:

         4.2.1    the failure by the Company after Completion to make any claim,
                  election, surrender or disclaimer or to give any notice or
                  consent or to do any other thing the making, giving or doing
                  of which could have been performed by the Company and full
                  written details Of which have been given by the AES Seller to
                  the AES Buyer or the Company at least two months before the
                  date by which such thing has to be performed and which was
                  taken into account in computing any provision for current or
                  deferred Taxation which appears in the Accounts (or
                  eliminating any provision for current or deferred Taxation
                  which, but for such Relief, would have appeared in the
                  Accounts);

         4.2.2    the withdrawal or amendment by the Company after Completion of
                  any claim for capital allowances made by the Company prior to
                  the last Accounting Date;

         4.2.3    a voluntary disclaimer, claim or election made or notice or
                  consent given by the AES Buyer or the Company after Completion
                  which could reasonably have been avoided

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<PAGE>   75



                  (otherwise than at the request of the AES Seller under the
                  provisions of this Agreement and otherwise than pursuant to an
                  obligation, whether legally binding or not, incurred prior to
                  the date of this Agreement) and which the AES Buyer was or
                  ought reasonably to have been aware would give rise to a
                  Liability or Taxation;

         4.2.4    a cessation of the trade carried on by the Company or a major
                  change in the nature or conduct of the trade carried on by the
                  Company in either case after Completion;

         4.2.5    the failure by the Company or the AES Buyer to comply with any
                  of their respective obligations under clause 5 (Mitigation);

         4.2.6    any changes in the law (whether relating to Taxation, rates of
                  Taxation or otherwise) or the withdrawal of any extra
                  statutory concession previously made by the Inland Revenue or
                  any other Taxation Authority or change in the generally
                  published interpretation or practice of any Tax Authority and
                  whether or not having retrospective effect;

         4.2.7    the Company ceasing to be taxed at the small companies' rate
                  of corporation tax as a result of the purchase of the $hares
                  by the AES Buyer;

         4.2.8    any change in the basis on which the Company prepares its
                  accounts other than a change designed to comply with generally
                  accepted accounting principles at the date hereof; or

         4.2.9    a voluntary act or omission by the AES Buyer or the Company
                  after Completion which could reasonably have been avoided
                  outside the ordinary course of the Company's business as
                  carried out at the date of Completion (unless pursuant to an
                  obligation, whether legally binding or not, incurred prior to
                  the date of this Agreement, or taking place with the approval
                  of the AES Seller) and which the AES Buyer was or ought
                  reasonably to have been aware would give rise to a Liability
                  or Taxation.

4.3      For the avoidance of doubt, limitations on the AES Seller's liability
         in respect of Tax Claims are also contained in clause 5 of the
         Agreement and where the provisions of that clause and this Indemnity
         conflict, this Indemnity shall prevail.

5.       MITIGATION OF LIABILITY

5.1      Where:

         5.1.1    it appears to the AES Seller that a Liability to Taxation may
                  arise or has arisen in respect of which the AES Seller is or
                  will or may become liable to pay an amount to the AES Buyer
                  under this Agreement; and

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<PAGE>   76



         5.1.2    the AES Seller has available amounts eligible for surrender by
                  way of group relief, or advance corporation tax the benefit of
                  which may be surrendered, or any other available reliefs any
                  of which, if surrendered to the Company, would reduce or
                  eliminate such Liability to Taxation or prevent such claim
                  from arising in whole or in part;

         then, at the request and expense of the AES Seller, the Purchaser shall
         (or shall procure that the Company shall) make all such claims for
         group relief and give all other such claims, elections and consents as
         the AES Seller may reasonably require, and do all such other things as
         may be necessary for the Company or the AES Buyer to give effect to
         such claims, surrenders, consents and elections.

5.2      Where the AES Seller has paid an amount to the AES Buyer under this
         Indemnity or for breach of any Tax Warranty in respect of a liability
         of the Company to account for advance corporation tax which is
         subsequently (whether in whole or in part) set off against the
         Company's liability to corporation tax for any account period under
         section 239 of the Taxes Act 1988 the AES Buyer shall repay to the AES
         Seller the whole or a proportional part as the case may be of the
         amount previously paid by the AES Seller to the AES Buyer, such
         repayment to be made:

         5.2.1    where the Company receives a repayment of corporation tax on
                  the fifth Business Day after the date on which the Company
                  receives such repayment; and

         5.2.2    where the Company satisfies a liability to pay corporation
                  tax, on the date of which such corporation tax would otherwise
                  have been required to be paid.

6.       OVER-PROVISIONS

6.1      The AES Seller shall be entitled to require the AES Buyer to request
         the auditors for the time being of the Company to determine (as experts
         and not as arbitrators and at the expense of the AES Seller) whether
         any provision for Taxation in the Accounts (excluding any provision for
         deferred Taxation) has proved to be an over-provision and if the
         auditors so determine the amount of such over-provision shall be dealt
         with in accordance with clause 6.2.

6.2      Where it is provided under clause 6.1 that any amount is to be dealt
         with in accordance with this clause:

         6.2.1    the amount shall first be set off against any payment due from
                  the AES Seller under this Agreement; and


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<PAGE>   77



         6.2.2    to the extent that there is any excess which is not exhausted
                  under clause 6.2.1 the remainder of that excess shall be
                  carried forward and set off against any future payment which
                  becomes due from the AES Seller under this Agreement.

7.       CONDUCT OF NEGOTIATION AND PROCEEDINGS

7.1      If the AES Buyer or the Company becomes aware of a Claim relevant for
         the purposes of this Schedule it shall as soon as reasonably
         practicable and in any case within 10 Business Days give written notice
         of it to the AES Seller.

7.2      The AES Buyer and the Company shall be at liberty to take any
         reasonable action to avoid, resist, appeal, compromise or defend the
         Claim provided that the AES Buyer:

         7.2.1    keeps the AES Seller fully informed of all matters relating to
                  the Claim and delivers to the AES Seller copies of all
                  material correspondence relating to the Claim;

         7.2.2    obtains the AES Seller's prior written approval (not to be
                  unreasonably withheld or delayed) to:

                  (a)      the appointment of solicitors or other professional
                           advisers; and

                  (b)      the content and sending to a Tax Authority of each
                           communication (written or otherwise) relating to the
                           Claim; and

         7.2.3    obtains the AES Seller's prior written approval (not to be
                  unreasonably withheld or delayed) to:

                  (a)      the settlement or compromise of the Claim; and

                  (b)      the agreement of any matter which is likely to affect
                           the amount of the Claim or the future liability of
                           the AES Seller or any subsidiary or holding company
                           of the AES Seller in respect of Tax.

7.3      If the AES Seller notifies the AES Buyer that it does not approve any
         matter referred to in clauses 7.2.2 and 7.2.3 above and agreement in
         respect of such matter has not been reached with the AES Buyer within
         10 Business Days of such notification, the AES Seller shall (subject to
         clause 7.4 below) be at liberty to take over the conduct of all
         negotiations and proceedings in relation to the relevant Claim and the
         AES Buyer and the Company shall take such action in connection
         therewith as the AES Seller may reasonably request, provided that the
         AES Seller shall indemnify the AES Buyer and the Company against any
         reasonable loses, costs, liabilities, damages and expenses which may be
         incurred and provided that neither the AES Buyer nor the Company shall
         be required to take any action which it reasonably considers will be
         materially prejudicial to it.

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7.4      If the AES Seller takes over the conduct of negotiations and
         proceedings in relation to any Claim under clause 7.3 above, then the
         AES Seller shall:

         7.4.1    keep the AES Buyer fully informed of all matters relating to
                  the Claim and deliver to the AES Buyer copies of all material
                  correspondence relating to the Claim;

         7.4.2    obtain the AES Buyer's prior written approval (not to be
                  unreasonably withheld or delayed) to:

                  (a)      the appointment of solicitors or other professional
                           advisers; and

                  (b)      the content and sending to a Tax Authority of each
                           communication (written or otherwise) relating to the
                           Claim; and

         7.4.3    obtain the AES Buyer's prior written approval (not to be
                  unreasonably withheld or delayed) to:

                  (a)      the settlement or compromise of the Claim; and

                  (b)      the agreement of any matter which is likely to affect
                           the amount of the Claim or the future liability of
                           the Company or the AES Buyer or any subsidiary or
                           holding company of either of them in respect of Tax.

7.5      If the AES Buyer notifies the AES Seller that it does not approve any
         matter referred to in clauses 7.4.2 and 7.4.3 above and agreement in
         respect of such matter has not been reached with the AES Seller within
         10 Business Days of such notification, the AES Buyer shall be at
         liberty to take over again the conduct of all negotiations and
         proceedings in relation to the relevant Claim and the provisions of
         clauses 7.2 and 7.3 above shall apply to this further conduct.

8.       TAX RETURNS

         The AES Buyer or its duly authorised agents shall prepare the tax
         returns and the computations of the Company for all accounting periods
         ending on or before Completion. The AES Buyer shall deliver all tax
         returns, computations and accompanying statutory accounts to the AES
         Seller for comment before submitting them to any Tax Authority. The tax
         returns, computations, claims and consents (so far as not already
         authorised signed and submitted) shall be authorised signed and
         submitted to the appropriate authority with such amendments as the AES
         Seller or its duly authorised agents shall reasonably request as long
         as the AES Buyer is not required to make any amendment which it
         reasonably considers will be materially prejudicial to it or the
         Company or any Subsidiary or Holding Company of either of them. The AES
         Buyer or its authorised agents shall prepare all documentation and

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<PAGE>   79



         deal with all matters (including correspondence) subject to clause 7,
         relating to the said returns, computations, claims, consents and
         surrenders PROVIDED that all of such documentation and correspondence
         is approved by the AES Seller or its authorised agents prior to
         submission to the Taxation Authority (such approval not to be
         unreasonably withheld or delayed). If the AES Buyer or its agents
         become aware of any matter raised by the Inland Revenue or other
         relevant authority in relation to the tax returns and computations of
         the Company for the accounting periods ending on or prior to Completion
         the AES Buyer shall procure that written notice of the matter in
         question be promptly given to the AES Seller.

9.       DATE FOR PAYMENT

9.1      The AES Seller shall make payments to the AES Buyer under this Schedule
         or under the Tax Warranties not later than on the following dates:

         9.1.1    insofar as a Claim represents Taxation to be borne by the
                  Company but which has not yet become due, the AES Seller shall
                  take the payment in respect of that Claim (or so much thereof
                  as represents that Taxation) 5 Business Days before that
                  Taxation becomes due;

         9.1.2    insofar as a Claim consists of the loss of a right to
                  repayment of Taxation, the AES Seller shall make the payment
                  in respect of that Claim (or so much thereof as represents
                  that loss) on the date on which that repayment would otherwise
                  have become due; and

         9.1.3    in any other case, the AES Seller shall make the payment 5
                  Business Days after the date on which a notice containing a
                  written demand for the amount of the payment required to be
                  made is delivered to the AES Seller;

         and for this purpose references to a date on which Taxation becomes due
         include a reference to the date on which it would have become due were
         it not for the availability of some Relief or right to repayment of
         Taxation. Any payment which becomes due on a day which is not a
         Business Day shall be paid on the next following Business Day. No
         payment shall be treated as made until cleared funds in respect thereof
         are available to the AES Buyer.

         9.2      If any payment required to be made by the AES Seller under
                  this deed is not made by the due date for payment thereof,
                  then that payment shall carry interest from the due date of
                  payment until actual payment at the rate of 2 percent above
                  the Base Rate from time to time of Barclays Bank plc.

10.      RECOVERY

10.1     Save where recovery is pursuant to clause 10.2 below if the AES Seller
         has made a payment to the AES Buyer under this Indemnity or for breach
         of any Tax Warranty and the Company

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         recovers from any third party (including any 'taxation Authority) any
         sum (including any interest or repayment supplement) in respect of the
         matter to which the payment made by the AES Seller relates the AES
         Buyer shall procure that the Company accounts to the AES Seller for
         such sum less any reasonable costs fees or expenses reasonably incurred
         by the Company or the AES Buyer in recovering such sum up to the amount
         of the payment previously made by the AES Seller to the AES Buyer in
         respect of the matter in question under this Indemnity or for breach of
         the Tax Warranty such payment to be made by the Company five Business
         Days after the Company actually recovers the sum.

10.2     Subject to clause 10.1, if:

         10.2.1   the Company or the AES Buyer is entitled to recover from
                  another person a sum in respect of a matter to which clause 3
                  or any Tax Warranty relates; and

         10.2.2   the AES Seller has first agreed (to the AES Buyer's reasonable
                  satisfaction) to indemnify the AES Buyer and the Company
                  against all costs which the AES Buyer or the Company may incur
                  in connection with the taking of the following action,

         then, subject to clause 10.3 and at the AES Seller's request, the A@S
         Buyer shall, and shall ensure that the Company will, take any action
         reasonably requested by the AES Seller to enforce recovery against the
         other person.

10.3     The AES Buyer need not take any action which the AES Buyer or the
         Company reasonably considers to be prejudicial to its commercial
         interests.

10.4     The AES Buyer shall account to the AES Seller for the lesser of:

         10.4.1   the sum recovered (including any interest paid by the, other
                  person), net of any Tax on the sum and that interest and less
                  any reasonable costs, fees or expenses reasonably incurred by
                  the Company or the AES Buyer in recovering such sum; and

         10.4.2   the amount paid by the AES Seller under clause 3 or for breach
                  of any Tax Warranty in respect of that matter.



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                                   SCHEDULE 8

                      PEI CONTRACTS EXCLUDED FROM WARRANTY


PEI Current Contracts

NUMBER                              LOCATION

9351                                Colorado Springs, CO
9456-1                              Rockford, IL
9457                                Norfolk, VA
9457A                               Norfolk, VA
9570                                Barrie, Ontario
9575                                City of St Louis
9673                                Mahopac, NY
9676                                Spartanburg, SC
9677                                Danbury, CT
9678                                Corazal, PR
9679                                Rockport, MA
9780                                Detroit Pilot Plant
9781                                Philadelphia Pilot Plants
9782                                EXXON Chemicals Corp.
9783                                Coca, EL
9784                                Taber, Alberta
9785                                WPT - New Orleans, LA
9786                                Vineland, NJ
9787                                Brooklyn College
9788                                Shandaggen Farms
9889                                Valley Pride


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EXECUTED by the parties:


SIGNED by                                   )
for and on behalf of ANGLIAN WATER          )
SERVICES LIMITED                            )




SIGNED by                                   )
for and on behalf of ANGLIAN WATER          )
INC                                         )




SIGNED by                                   )
for and on behalf of ANGLIAN WATER          )
INTERNATIONAL LIMITED                       )




SIGNED by                                   )
for and on behalf of WATERLINK UK           )
LIMITED                                     )




SIGNED by                                   )
for and on behalf of WATERLINK INC          )
                                            )


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