ADT LIMITED
S-4/A, 1997-05-09
MISCELLANEOUS BUSINESS SERVICES
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                                                   Registration No. 333-24363

==============================================================================
    

                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

   
                              AMENDMENT NO. 1 TO
                                   FORM S-4
            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
    

                                -----------

                                  ADT LIMITED
            (Exact Name of Registrant as Specified in its Charter)

<TABLE>
<S>                                             <C>                                          <C>
                    Bermuda                                           7382                                  Not Applicable
(State or Other Jurisdiction of Incorporation or (Primary Standard Industrial Classification  (I.R.S. Employer Identification No.)
                 Organization)                                    Code Number)
</TABLE>

                                Cedar House
                              41 Cedar Avenue
                          Hamilton HM12, Bermuda
(Address, Including Zip Code, and Telephone Number, Including Area Code, of
                 Registrant's Principal Executive Offices)

                                -----------

                             Stephen J. Ruzika
                               c/o ADT, Inc.
                           1750 Clint Moore Road
                           Boca Raton, FL 33431
                              (561) 988-3600
(Name, Address, Including Zip Code, and Telephone Number, Including Area Code
                           of Agent for Service)

*ADT Limited maintains its registered and principal executive offices at Cedar
House, 41 Cedar Avenue, Hamilton HM12 Bermuda.  The executive offices of the
subsidiary which supervises ADT Limited's subsidiaries' activities in North
America are located at 1750 Clint Moore Road, Boca Raton, Florida, 33431.  The
telephone number there is (561) 988-3600.

                                -----------

Copies To:
<TABLE>
<S>                                         <C>                          <C>
      John J. McCarthy, Jr., Esq.                Mark H. Swartz                Joshua M. Berman, Esq.
        David W. Ferguson, Esq.              Tyco International Ltd.           Abbe L. Dienstag, Esq.
         Davis Polk & Wardwell                    One Tyco Park           Kramer, Levin, Naftalis & Frankel
          450 Lexington Avenue                  Exeter, NH 03833                  919 Third Avenue
          New York, NY  10017                    (603) 778-9700                  New York, New York
             (212) 450-4000                                                        (212) 715-9100
</TABLE>

                                -----------

     APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:  As
soon as practicable after this Registration Statement becomes effective and
all other conditions to the merger (including the receipt of certain
regulatory approvals) contemplated by the Agreement and Plan of Merger,
dated as of March 17, 1997, described in the enclosed Joint Proxy
Statement/Prospectus, have been satisfied or waived.
   
     If the securities being registered on this form are being offered in
connection with the formation of a holding company and there is compliance
with General Instruction G, check the following box. [ ]
    

                                -----------

THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR DATES
AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OF 1933, AS AMENDED, OR UNTIL THE REGISTRATION STATEMENT
SHALL BECOME EFFECTIVE ON SUCH DATE AS THE SECURITIES AND EXCHANGE COMMISSION,
ACTING PURSUANT TO SAID SECTION 8(a), MAY DETERMINE.

==============================================================================



   

                   (SUBJECT TO COMPLETION DATED MAY 9, 1997)
    

[Tyco logo]                                                         [ADT logo]

                  MERGER PROPOSED--YOUR VOTE IS VERY IMPORTANT

   
     The Boards of Directors of Tyco International Ltd. and ADT
Limited have agreed upon a merger of Tyco and ADT and are seeking your vote
for this important transaction.  Tyco is the world's largest manufacturer and
provider of fire protection systems and services.  ADT is the largest provider
of security electronic services in North America and the United Kingdom.  By
combining the two companies and their complementary operations, Tyco and ADT
expect to increase their sales and business opportunities, market their
products and services more efficiently and enhance long-term value for their
shareholders.

     In the merger, Tyco shareholders will receive one share  for
each Tyco share.  ADT shareholders will continue to own their existing shares
after the merger.  However, as a result of an ADT reverse stock split, which
ADT shareholders are being asked to approve in connection with the merger,
each existing ADT share will become 0.48133 of a combined company share
(subject to adjustment under certain circumstances) after the merger.  The
reverse stock split will not apply to the shares issued to Tyco shareholders
in the merger.

     Tyco shareholders will own approximately 64% of the outstanding
shares of the combined company after the merger. ADT shareholders will own
approximately 36% of the outstanding shares after the merger.

     Shareholders of Tyco are being asked, at Tyco's special meeting
of shareholders, to approve the merger and the merger agreement.

     Shareholders of ADT are being asked, at ADT's special general
meeting of shareholders:  to authorize the issuance of ADT shares in the
merger, to approve the reverse stock split and an increase in the authorized
share capital of  ADT, and to approve the change of ADT's name to Tyco
International Ltd.  ADT shareholders are also being asked to elect eight
members of Tyco's present board to ADT's Board of Directors effective upon the
merger, so that after the merger the ADT Board of Directors will consist of
these eight directors and three members of ADT's present board.  The merger
cannot be completed unless shareholders of Tyco and ADT approve each of these
matters.  In addition, ADT shareholders are being asked (i) to approve certain
changes to ADT's option plan and to ratify the assumption by ADT of certain
Tyco options and warrants and the grant of existing ADT options, and
(ii) to approve an amendment to ADT's bye-laws, although approval of these
matters is not a condition to the merger.

     Whether or not you plan to attend a meeting, please take the
time to vote on the proposal(s) submitted to shareholders by completing and
mailing the enclosed proxy card to us.  If you sign, date and mail your proxy
card without indicating how you wish to vote, your proxy will be counted as a
vote in favor of the proposal(s). If you are a Tyco shareholder and fail to
return your card, the effect will be the same as a vote against the merger
unless you appear in person at the Tyco meeting and vote in favor of the
merger.  If you are an ADT shareholder and fail to return your card, you
will not be counted as present or voting unless you appear in person.  YOUR
VOTE IS VERY IMPORTANT.
    

     The dates, times and places of the meetings are:

                For Tyco shareholders:

   
                         June __, 1997
                         ______
                         ________________
    



                For ADT shareholders:

   
                         June __, 1997
                         10:00 a.m.
                         Cedar House
                         41 Cedar Avenue
                         Hamilton HM12, Bermuda
    


   
     This document provides you with detailed information about the
proposed merger.  It also provides ADT shareholders with detailed
information about the ADT-specific matters on which they are being asked to
vote.  In addition, you may obtain information about our companies from
documents that Tyco and ADT have filed with the Securities and Exchange
Commission.  We encourage you to read this entire document carefully.
    


- ------------------------------------      ------------------------------------
L. Dennis Kozlowski                       Michael A. Ashcroft
Chairman and Chief Executive Officer      Chairman and Chief Executive Officer
Tyco International Ltd.                   ADT Limited


SEE "RISK FACTORS" BEGINNING ON PAGE 12 FOR A DISCUSSION OF CERTAIN MATTERS
WHICH SHOULD BE CONSIDERED BY SHAREHOLDERS WITH RESPECT TO THE MERGER.
Neither the Securities and Exchange Commission nor any state securities
regulators have approved the ADT Common Shares to be issued under this
Joint Proxy Statement/Prospectus or determined if this Joint Proxy
Statement/Prospectus is accurate or adequate.  Any representation to the
contrary is a criminal offense.  The information in this prospectus is not
complete and may be amended.  We may not sell these securities until the
registration statement filed with the Securities and Exchange Commission is
effective.  This prospectus is not an offer to sell nor is it seeking an
offer to buy these securities in any state where the offer or sale is not
permitted.

Joint Proxy Statement/Prospectus dated May __, 1997 and first mailed to
shareholders on May __, 1997.


   
                             TABLE OF CONTENTS

QUESTIONS AND ANSWERS ABOUT THE MERGER................................ 1

SUMMARY............................................................... 3

RISK FACTORS......................................................... 13

THE MERGER........................................................... 15
 General............................................................. 15
   Background of the Merger.......................................... 16
   ADT's and Tyco's Reasons for the Merger........................... 23
   Recommendation of the Tyco Board.................................. 24
   Recommendation of the ADT Board................................... 25
   Certain Other Matters Relating to the Combined Company............ 26
   Cautionary Statement Concerning Forward-Looking Statements........ 27
   Accounting Treatment.............................................. 27
   Certain United States Federal Income, United Kingdom and Bermuda
     Tax Consequences................................................ 28
   Regulatory Matters................................................ 30
   Appraisal Rights.................................................. 30
   U.S. Federal Securities Laws Consequences; Stock Transfer
     Restriction Agreements.......................................... 32

CURRENT DEVELOPMENTS................................................. 33
    
COMPARATIVE PER SHARE MARKET PRICE AND DIVIDEND INFORMATION.......... 34

UNAUDITED PRO FORMA COMBINED CONDENSED FINANCIAL INFORMATION......... 35

ROLE OF FINANCIAL ADVISORS........................................... 44
   Opinion of Tyco's Financial Advisor............................... 44
   Opinion of ADT's Financial Advisor................................ 47

INTERESTS OF CERTAIN PERSONS IN THE MERGER........................... 55
   Tyco and ADT Directors and Officers Insurance; Indemnification
     of Tyco and ADT Directors and Officers.......................... 55
   ADT Employment Agreements and Other Agreements.................... 55

THE MERGER AGREEMENT................................................. 57
   General........................................................... 57
   Merger Consideration.............................................. 57
   Treatment of Tyco Stock Options................................... 57
   Treatment of Tyco Warrants........................................ 57
   Tyco Restricted Stock Plan........................................ 58
   Exchange of Shares................................................ 58
   Certain Covenants................................................. 58
   Certain Representations and Warranties............................ 62
   Conditions to the Merger.......................................... 62
   Termination of the Merger Agreement............................... 63
   Other Expenses.................................................... 66

THE MEETINGS......................................................... 67
   Times and Places; Purposes........................................ 67
   Voting Rights; Votes Required for Approval........................ 67
   Proxies........................................................... 69

BUSINESSES OF TYCO AND ADT........................................... 71
   Tyco.............................................................. 71
   ADT............................................................... 76

ELECTION OF DIRECTORS................................................ 85
   Information Concerning Nominees................................... 85
   Removal of Directors.............................................. 86
   Directors and Executive Officers.................................. 87
   Security Ownership of Certain Beneficial Owners of ADT and ADT
     Management...................................................... 89
   Security Ownership of Certain Beneficial Owners of Tyco and Tyco
     Management...................................................... 90
   ADT Executive Compensation........................................ 91
   Certain Relationships and Related Transactions.................... 97

ADT MERGER PROPOSAL ON RECAPITALIZATION.............................. 98
OTHER ADT MEETING PROPOSALS
   The Option and Warrant Proposal................................... 99
   ADT Bye-Law Amendment Proposal................................... 105

COMPARISON OF SHAREHOLDER RIGHTS.................................... 107
   General.......................................................... 107
   Comparison of Current Tyco Shareholder Rights and Rights of
     Combined Company Shareholders Following the Merger............. 107

DESCRIPTION OF COMBINED COMPANY SHARE CAPITAL....................... 117
   Authorized Share Capital......................................... 117
   Combined Company Common Shares................................... 117
   Combined Company Preference Shares............................... 118
   Stock Exchange Listing; Delisting and Deregistration of Tyco
     Common Shares.................................................. 118

LEGAL MATTERS....................................................... 118

EXPERTS............................................................. 119

FUTURE SHAREHOLDER PROPOSALS........................................ 119

WHERE YOU CAN FIND MORE INFORMATION................................. 119

LIST OF DEFINED TERMS............................................... 121

LIST OF ANNEXES
Annex I    Agreement and Plan of Merger
Annex II   Opinion of Credit Suisse First Boston Corporation
Annex III  Opinion of Merrill Lynch, Pierce Fenner & Smith Incorporated
Annex IV   Provisions of Massachusetts Law Governing Shareholder Appraisal
           Rights


    



                    QUESTIONS AND ANSWERS ABOUT THE MERGER


Q: Why have Tyco International Ltd. and ADT Limited proposed a merger?

   
A: The businesses of Tyco and ADT are complementary. Tyco is the world's
   largest manufacturer and provider of fire protection systems and services.
   ADT is the largest provider of electronic security services in North
   America and the United Kingdom. Tyco and ADT expect the combined company to
   grow by marketing products and services to each other's customers,
   efficiently serving customer needs for both fire protection and security.
   For Tyco, the merger will continue the expansion of its service business,
   which is already substantial. This business has higher profit margins and
   is less susceptible to cyclical variation than Tyco's fire safety
   installation business. For ADT, the merger will provide access to Tyco's
   worldwide business presence, which spans over 50 countries.  For a more
   detailed discussion of the reasons for the merger, see pages 15 through 26.
   However, achieving the anticipated benefits of the merger is subject to
   certain risks, as discussed under "Risk Factors" on page 13 and "The
   Merger--Cautionary Statement Concerning Forward-Looking Statements" on page
   27.

Q: Is Tyco acquiring ADT or is ADT acquiring Tyco?

A: Tyco and ADT will combine through a merger of Tyco and a subsidiary of ADT.
   Legally, ADT will be the continuing public company. However, Tyco's
   shareholders initially will hold approximately 64% of the shares in the
   combined company, Tyco's present directors initially will constitute eight
   out of the eleven members of the Board of Directors of the combined
   company, Tyco's Chief Executive Officer and its Chief Financial Officer
   will be Chief Executive Officer and Chief Financial Officer of the combined
   company, and the combined company will be named Tyco International Ltd. In
   this sense, the merger can be seen as Tyco acquiring ADT.

Q: What will happen to the stock of Tyco and ADT in the merger?

A: Tyco shareholders will receive one share in the combined company for
   each share of Tyco stock.  A reverse stock split (which will not apply
   to Tyco shareholders) will result in ADT shareholders holding 0.48133
   of a share in the combined company (subject to adjustment under certain
   circumstances) for each of their existing ADT shares.  ADT shareholders
   will receive a whole number of shares and a cash payment for any
   fractional shares arising from the reverse stock split.
    

   For example, a Tyco shareholder that owns 100 shares of Tyco will own
   100 shares of the combined company following the merger.  An ADT
   shareholder that owns 100 shares of ADT will own 48 shares in the
   combined company and will receive a check for the market value of 0.133
   of a share in the combined company.


   
Q: Will I be taxed on the transaction?

A: Any gain on the exchange of shares by U.S. shareholders of Tyco will be
   taxable for U.S. federal income tax purposes.  Any loss on the exchange
   of shares by U.S. shareholders of Tyco will not be recognized by those
   shareholders for U.S. federal income tax purposes, and those
   shareholders will have a carryover basis in those shares.  The merger
   and the reverse stock split will be tax-free to U.S. and U.K.
   shareholders of ADT for U.S. federal income tax purposes and U.K. capital
   gains tax purposes except to the extent that shareholders receive cash
   in lieu of fractional shares.  To review the U.S. federal income tax
   consequences of the merger and reverse stock split for U.S. shareholders
   and the U.K. tax consequences of the reverse stock split for ADT's U.K.
   shareholders in greater detail, see page 28.  Shareholders who are
   subject to tax in jurisdictions other than the U.S. are advised to
   obtain their own advice as to the tax consequences for them of the
   merger.

Q: When will the merger take effect?

A: Tyco and ADT expect that the merger will become effective promptly after
   their shareholders have voted on it. The shareholder meetings of both Tyco
   and ADT are scheduled for June __, 1997.

Q: If I am an ADT shareholder, how much will my shares be worth after the
   merger?

A: That will depend on the market price of the combined company common shares
   after the merger.  On May 8, 1997, the closing price of Tyco common stock
   on the New York Stock Exchange was $62 3/8.  If the shares of the combined
   company had that market value after the merger and the reverse stock split,
   each holder of a currently outstanding ADT share would be entitled to
   receive shares of the combined company with a market value of approximately
   $30.02.  However, the market prices for Tyco shares and ADT shares are
   likely to change between now and the merger.  You are urged to obtain
   current price quotes for Tyco and ADT shares.
    

Q: Will the combined company pay dividends?

A: Tyco currently pays quarterly dividends of $0.05 per share. ADT does not
   currently pay dividends. The combined company expects to continue Tyco's
   dividend practice. Of course, this may be changed at any time by the Board
   of Directors of the combined company.

   
Q: Will shareholders have appraisal rights?

A: Shareholders of Tyco will be entitled to appraisal rights. Shareholders of
   ADT will not. Appraisal rights will allow Tyco shareholders who have
   followed required procedures to receive the cash value of their shares, as
   determined by a court, instead of the shares in the combined company
   issuable in the merger. The cash payment could be higher or lower than the
   value of shares in the combined company. The requirements for seeking
   appraisal are summarized on page 30, and the provisions of Massachusetts
   law that govern appraisal rights are attached as Annex IV. Shareholders of
   Tyco who wish to seek an appraisal of their shares should read and follow
   those provisions carefully.

Q: What should I do now?

A: Just mail your signed proxy card in the enclosed envelope, as soon as
   possible, so that your shares will be represented at the Tyco
   shareholders meeting or the ADT shareholders meeting.  The Board of
   Directors of Tyco recommends that shareholders of Tyco vote in favor of
   approval of the merger and the merger agreement.  The Board of Directors
   of ADT recommends that shareholders of ADT vote in favor of the
   proposals submitted to ADT shareholders.  After the merger is completed,
   shareholders of both companies will receive written instructions for
   exchanging their share certificates.

Q: Can shareholders change their votes after they have mailed in a signed
   proxy card?

A: Yes.  Shareholders can change their votes in one of the following ways
   at any time before their proxy cards are used.  First, shareholders can
   revoke their proxies by written notice.  Second, shareholders can
   complete new proxy cards.  Third, shareholders can attend the
   appropriate meeting and vote in person.  In addition, in the case of
   ADT, shareholders may alter the instructions as to how their proxies are
   to vote (without revoking the proxies) by giving notice of the
   alteration to the Secretary of ADT before the vote is taken.  For
   details please see "The Meetings--Voting Rights;  Votes Required for
   Approval--Tyco," "The Meetings--Voting Rights;  Votes Required for
   Approval--ADT" and "The Meetings--Proxies" on pages 67 through 70.

Q: Who should shareholders call with questions?

A: Shareholders who have questions about the merger should call D.F.  King
   & Co., Inc.  Tyco shareholders should call 1-800-848-3405 (toll-free in
   the United States).  ADT Shareholders should call 1-800-488-8035 (toll-
   free in the United States) or 0171-600-5005 (in the United Kingdom) or
   212-269-5550 in the United States (for shareholders outside the United
   States and the United Kingdom).
    

                                    SUMMARY

   
This summary highlights selected information from this Joint Proxy
Statement/Prospectus and may not contain all of the information that is
important to you. To understand the merger fully and for a more complete
description of the legal terms of the merger, you should read carefully this
entire document and the documents to which you have been referred. See "Where
You Can Find More Information" (page 119).  For a table of the defined terms
used in this summary and elsewhere in this Joint Proxy Statement/Prospectus,
see page 121.

                                 The Companies

Tyco International Ltd.
One Tyco Park
Exeter, New Hampshire 03833, USA
(603) 778-9700

     Tyco International Ltd. is the largest contractor in the world
for the design, installation and servicing of fire protection systems and is a
leading manufacturer and distributor of fire detection and fire suppression
products.  Fire protection accounted for 38% of Tyco's fiscal 1996 net
revenues and 19% of Tyco's fiscal 1996 earnings before interest and taxes.
Tyco also manufactures and distributes disposable medical supplies and other
specialty products, flow control products and electrical and electronic
components.  Tyco has a strong leadership position in each of the markets in
which it competes.  With operations in more than 50 countries world-wide, Tyco
had sales of over $5 billion in its fiscal year ended June 30, 1996.
    

     Tyco's strategy is to be the low-cost, high quality producer in
each of its markets.  It promotes its leadership position by investing in
existing businesses, developing new markets and acquiring complementary
businesses and products.  Combining the strengths of its existing operations
and its business acquisitions, Tyco seeks to enhance shareholder value through
increased earnings per share.

   
     For further information on the business of Tyco, see pages 71 to 76.
    

ADT Limited

Cedar House
41 Cedar Avenue
Hamilton HM12, Bermuda
(441) 295-2244

   
     ADT was organized in Bermuda in September 1984 under the name
Hawley Group Limited.  It is engaged in two service businesses, electronic
security services in North America and Europe and vehicle auction and related
services in the United States.  ADT sells, installs, monitors and maintains
electronic security devices in customers' businesses or residences.  These
devices provide detection of events, such as intrusion or fire, and
surveillance and control of access.  ADT believes that it is the largest
provider of electronic security services in North America and the United
Kingdom.  Electronic security services accounted for 82% of ADT's 1996 net
revenues and 84% of ADT's 1996 earnings before interest, taxes and nonrecurring
charges.  ADT also operates a network of large modern vehicle auction centers
in the United States.

     For further information on the business of ADT, see pages 76 to 84.

                               The Meetings

     The meetings of the Tyco shareholders and the ADT shareholders
will be held on June __, 1997.

     The record date for shareholders of Tyco entitled to receive
notice of and to vote at the Tyco special meeting is May 13, 1997.  On that
date there were ___ common shares of Tyco outstanding.

     The record date for shareholders of ADT entitled to receive
notice of the ADT special general meeting is May 13, 1997.  On that date there
were ___ common shares of ADT outstanding.  All holders of record of ADT
common shares on the date of the ADT special general meeting will be entitled
to vote at that meeting.
    

                          Reasons for the Merger

   
     Tyco and ADT believe that the merger will create the premier
company in the fire protection and electronic security businesses that will be
well positioned to improve their leadership positions in the marketplace.  The
merger should provide opportunities to achieve substantial benefits for Tyco
and ADT shareholders that might not otherwise be available.  Also, with its
expanded markets, financial resources, management, personnel and expertise,
the combined company should be better able to serve the existing customers of
Tyco and ADT and to capitalize on growth opportunities in the fire protection
and commercial electronic security markets.

     To review the reasons for the merger in greater detail, see pages 23
through 26.
    

                      Recommendations to Shareholders

To Tyco Shareholders:

   
     The Tyco Board believes that the merger is in your best
interests and unanimously recommends that you vote FOR the proposal to approve
the merger and the merger agreement.
    

To ADT Shareholders:

   
     The ADT Board believes that the merger is in your best
interests and unanimously recommends that you vote FOR each of the proposals
submitted to you.
    

                                The Merger

     The merger agreement is attached as Annex I to this Joint Proxy
Statement/Prospectus.  You should read the merger agreement as it is the legal
document that governs the merger.

   
     What Tyco Shareholders Will Receive (See page 57)

     Tyco shareholders will receive one common  share of the
combined company for each Tyco common share.

     What Current ADT Shareholders Will Hold After the Merger

     As a result of a reverse stock split which ADT shareholders are
being asked to approve, each existing ADT share will become 0.48133 of a
combined company common share (subject to adjustment under certain
circumstances) after the merger.  ADT shareholders will receive a whole number
of shares and a cash payment for any fractional shares arising from the
reverse stock split.

    
Ownership of the Combined Company
   

     After the merger, Tyco shareholders will own approximately 64%,
and ADT shareholders will own approximately 36%, of the outstanding combined
company common shares.

Certain United States Federal Income, United Kingdom and Bermuda Tax
Consequences (see page 28)

     Any gain on the exchange of shares by U.S. shareholders of Tyco
will be taxable to those shareholders for U.S. federal income tax purposes.
Any loss on the exchange of shares by U.S. shareholders of Tyco will not be
recognized by those shareholders for U.S. federal income tax purposes, and
those shareholders will have a carryover basis in those shares.  The reverse
stock split will be tax-free to U.S. and U.K. shareholders of ADT for U.S.
federal income tax and U.K. capital gains tax purposes, except for cash
received in lieu of fractional shares.  Shareholders who are subject to tax in
jurisdictions other than the U.S. or, in the case of ADT, the U.K., are
advised to obtain their own advice as to the tax consequences for them of the
merger and reverse stock split.

The Proposals

     The shareholders of Tyco are being asked to approve the merger
and the merger agreement.

     The Tyco Board of Directors unanimously recommends that Tyco
shareholders vote in favor of approval of the merger and the merger agreement.

     The shareholders of ADT are being asked to approve a number of
matters.  Under the merger agreement, approval of these matters is required
for the merger to take place.  These matters include:

     (1) the issuance of ADT common shares in the merger;

     (2) a reverse stock split of the outstanding common shares of ADT
         immediately prior to the merger at the rate of 0.48133 of a new share
         for each outstanding ADT share (subject to adjustment under certain
         circumstances);

     (3) an increase in the number of authorized ADT common shares to
         750,000,000 shares and the issuance of those shares;

     (4) an expansion of the ADT Board of Directors to eleven directors,
         the removal of all but three of the current directors of ADT and
         the election of Tyco's eight current board members as new
         directors of ADT, effective upon the merger; and

     (5) a change in the name of ADT to Tyco International Ltd.

     In addition, shareholders of ADT are being asked (i) to approve certain
changes to ADT's option plan and to ratify the assumption by ADT of certain
Tyco options and warrants and the grant of existing ADT options and
(ii) to approve an amendment to ADT's bye-laws.  Approval of these matters is
not a condition of the merger.

     The ADT Board of Directors unanimously recommends that ADT
shareholders vote in favor of all of the matters being submitted to the ADT
shareholders.

Shareholder Vote Required

     The favorable vote of two-thirds of the outstanding Tyco common
shares is required to approve the merger and the merger agreement.  If you are
a Tyco shareholder and fail to return your card, the effect will be the same
as a vote against the merger unless you appear in person at the Tyco meeting
and vote in favor of the merger.

     The favorable vote of a majority of the ADT common shares
voting at the ADT meeting is required to approve the matters being voted on by
the ADT shareholders.
    

Board of Directors and Management of the Combined Company after the Merger

     ADT shareholders are being asked to elect Tyco's eight present
directors to the Board of Directors of the combined company and to remove all
but three of ADT's current directors. Michael Ashcroft and two current
independent directors will remain on the Board of Directors of the combined
company.

   
     L.  Dennis Kozlowski, the Chairman, President and Chief Executive
Officer of Tyco, will be the Chairman, President and Chief Executive
Officer of the combined company.  Mark H.  Swartz, the Vice President and
Chief Financial Officer of Tyco, will be the Vice President and Chief
Financial Officer of the combined company.
    

Interests of Officers and Directors in the Merger

   
     In considering the recommendations of the Tyco and ADT Boards of
Directors, Tyco and ADT shareholders should be aware that members of the
Boards of Directors of Tyco and ADT and certain members of their management
will receive certain benefits as a result of the merger that will be in
addition to benefits received by shareholders generally.  For further
details, see pages 55 and 56.

Conditions to the Merger (see page 62)

     The completion of the merger depends upon satisfaction of a
number of conditions, including the following:

          (1) registration with the Securities and Exchange Commission and
              listing on the New York Stock Exchange of combined company
              common shares to be issued in the merger;

          (2) approval of the merger and the merger agreement by the
              shareholders of Tyco and approval by the shareholders of ADT
              of each of the matters related to the merger on which they
              are being asked to vote;

          (3) receipt of any required regulatory approvals;

          (4) absence of governmental action prohibiting the merger or
              adversely affecting the combined company;

          (5) the absence of any law that makes the merger illegal; and

          (6) receipt of the opinions of Coopers & Lybrand L.L.P. and
              Coopers & Lybrand that the merger will qualify as a pooling
              of interests for accounting purposes.
    

     These conditions may be waived by the party entitled to assert
the condition.

   
Termination of the Merger Agreement (see page 63)
    

     Either Tyco or ADT may terminate the merger agreement if any of
the following occurs:

          (1) the merger is not completed by August 15, 1997;

          (2) a court or governmental agency permanently prohibits the
              merger or any of the related matters on which the ADT
              shareholders are voting;

   
          (3) the shareholders of either Tyco or ADT do not approve the
              matters submitted to them related to the merger;

          (4) the Board of Directors of the other party adversely
              modifies its approval of the merger;

          (5) the Board of Directors of either party adversely modifies its
              approval of the merger in keeping with its fiduciary
              obligations to shareholders;

          (6) the other party breaches its representations, warranties or
              obligations under the merger agreement and that breach cannot be
              remedied;

          (7) the average price of Tyco common shares for any ten
              consecutive trading days commencing after April 8, 1997 falls
              below $56; and
    

          (8) the average price of shares of Tyco common stock for the ten
              consecutive trading days ending on the fourth trading day
              prior to the ADT meeting is below $56, except that ADT may
              not exercise this right to terminate the merger agreement if
              Tyco agrees to certain adjustments to the ratio used in the
              reverse stock split.

     In addition, Tyco may terminate the merger agreement if the ADT
Board of Directors adversely modifies its approval of any of the matters
related to the merger being voted on by ADT shareholders or if the ADT Board
of Directors recommends a tender offer or merger proposal made by a third
party.

   
Termination Fees and Expenses (see page 65)
    

     A termination fee of $150 million (plus up to $7.5 million of
expenses) is required to be paid by ADT or Tyco to the other party if the
merger agreement is terminated under certain circumstances.

   
Regulatory Approvals

     The U.S. Hart-Scott-Rodino statute prohibits Tyco and ADT from
completing the merger until they have furnished certain information and
materials to the Antitrust Division of the Department of Justice and the
Federal Trade Commission and a required waiting period has expired.  On May 3,
1997, this waiting period expired.  The U.S. Department of Justice and the
Federal Trade Commission have the authority to challenge the merger on
antitrust grounds before or after the merger is completed.  Each state where
either Tyco or ADT has operations may also review the merger under state
antitrust law.

     The merger is subject to notification to and the approval of
the Commission of the European Communities under Council Regulation
4064/89/EEC on the control of concentrations.  The Commission has the
authority either to approve the merger or, if it has serious doubts as to the
compatibility of the merger with the common market, to open an in-depth
investigation which can last a maximum of four months.
    

     Tyco and ADT have given each other a commitment to use their
best efforts to take whatever actions are required to obtain these approvals.
However, Tyco and ADT cannot predict whether they will obtain the required
regulatory approvals within the time frame contemplated by the merger
agreement or on terms that they find satisfactory.

   
Accounting Treatment (see page 27)

     Tyco and ADT expect the merger to qualify as a pooling of
interests, which means that the companies will be treated as if they had always
been combined for accounting and financial reporting purposes.  Each company
must receive a letter from its independent accounting firm that it is their
opinion that the merger will qualify to be accounted for as a pooling of
interests.

Opinions of Financial Advisors (see pages 44 through 54)

     Before approving the merger agreement, the Boards of Tyco and
ADT considered opinions from their respective financial advisors with respect
to the fairness of the exchange ratio to their shareholders from a financial
point of view.  Tyco received an opinion from Credit Suisse First Boston
Corporation, and ADT received an opinion from Merrill Lynch, Pierce Fenner &
Smith Incorporated.  These opinions are attached as Annexes II and III to this
Joint Proxy Statement/Prospectus. You are encouraged to read these opinions in
their entirety.

     In connection with these opinions, the financial advisors
performed a variety of analyses. While not performed or presented in the same
way, the analyses included comparing ADT and Tyco historical stock prices,
comparing the financial terms of the merger to those of other publicly
announced transactions, and estimating the relative values and contributions
of ADT and Tyco.

Appraisal Rights (see page 30)

     Tyco shareholders who do not vote in favor of the merger and
who fully comply with the requirements of Massachusetts law will have the
right to an appraisal of their Tyco common shares pursuant to a court
proceeding.  Failure to take any required step in connection with the exercise
of appraisal rights may result in the termination or waiver of such rights.
    

     ADT shareholders do not have appraisal rights in connection
with the merger.

   
Comparative Per Share Market Price Information; Listing (see page 34)

     ADT and Tyco common shares are both listed on the New York
Stock Exchange, and ADT's shares are also listed on the London Stock Exchange
and the Bermuda Stock Exchange.  The New York Stock Exchange closing price for
ADT common shares was $21 3/4 on March 14, 1997, the last full trading day
prior to the public announcement of the proposed merger, and $28 1/8 on May 8,
1997.  The Tyco closing price was $60 1/4 on March 14, 1997, and $62 3/8 on
May 8, 1997.

     The combined company will apply to list the shares issuable in
the merger on the New York Stock Exchange, the London Stock Exchange and the
Bermuda Stock Exchange.

Effect on Existing Exchange Offer

     ADT shareholders should be aware that if the proposals to be
voted on by them are approved and if the merger is consummated, certain
proposals made by Western Resources, Inc. in connection with its exchange
offer for all of the outstanding shares of ADT it does not own may be less
likely to succeed because the merger will increase the outstanding shares of
the combined company.  In addition, the exchange offer by Western may be less
likely to succeed because of the increased cost of acquiring such shares or
the completion of the merger may cause Western to withdraw or terminate its
exchange offer.  For further information on these effects and how to revoke any
proxy given to Western, see page 69.
    



                   Selected Financial Data for Tyco and ADT

   
     The following financial information is being provided to assist your
analysis of the financial aspects of the merger.  This information has been
derived from Tyco's audited financial statements for the fiscal years ended
June 30, 1992 through June 30, 1996, Tyco's unaudited financial statements
for the nine months ended March 31, 1996 and 1997, ADT's audited financial
statements for the years ended December 31, 1992 through December 31, 1996
and ADT's unaudited financial statements for the three months ended March
31, 1996 and 1997.  The information is only a summary.  You should read it
in conjunction with the historical financial statements (and related notes)
contained in the annual, quarterly and other reports filed by Tyco and ADT
with the Securities and Exchange Commission ("SEC").  See "Where You Can
Find More Information" on page 119.  The unaudited pro forma information is
presented for illustrative purposes only and is not indicative of the
operating results or financial position that would have occurred if the
merger had been consummated at the dates indicated, nor is it necessarily
indicative of future operating results of the combined company.  References
in this Joint Proxy Statement/Prospectus to "$" mean United States dollars.
    

Selected Tyco Historical Financial Information
(in millions, except per share amounts)

<TABLE>
<CAPTION>
                                    At or for the nine months
                                         ended March 31,                       At or for the year ended June 30, (1)
                                  -----------------------------      ------------------------------------------------------------
                                    1997               1996           1996         1995        1994        1993        1992
<S>                               <C>                  <C>           <C>         <C>         <C>         <C>         <C>
Income Statement Data:
Net sales                             $4,746.3         $3,717.7      $5,089.8    $4,534.7    $4,076.4    $3,919.4    $3,066.5
Operating income (2)........             538.3            415.7         582.8       448.3       390.6       265.1       194.8
Income before extraordinary
 items and cumulative
 effect of accounting
 changes....................             281.1            215.9         310.1       216.6       189.2        94.5        95.3
Income per share before
 extraordinary items and
 cumulative effect of
 accounting changes.........              1.79             1.41          2.03        1.43        1.28        0.65        1.03
Cash dividends per common
 share......................              0.15             0.15          0.20        0.20        0.20        0.19        0.18
Balance Sheet Data:
Total assets................          $5,606.3                       $3,953.9    $3,381.5    $3,144.6    $3,165.0    $2,451.5
Long-term debt (including
 current portion)...........             838.9                          511.6       506.4       588.5       812.6       535.0
Total shareholders' equity..           2,845.7                        1,938.4     1,634.7     1,367.0     1,138.8     1,040.6
</TABLE>
_______________
(1) On October 19, 1994 Tyco merged with Kendall International, Inc.
   ("Kendall") in a transaction accounted for as a pooling of interests.  The
   summary historical data reflects the combined results of operations and
   financial position of Tyco and Kendall for all periods subsequent to June
   30, 1992, the date on which Kendall undertook a financial restructuring.
   The summary historical data at and for the year ended June 30, 1992 reflect
   only the results of operations and financial position of Tyco.

(2) Operating income in 1995 included merger and transaction related charges
   of $37.2 million relating to the Kendall merger. Operating income in 1993
   included a non-recurring inventory charge of $22.5 million relating to
   Kendall and a restructuring and severance charge of $39.3 million relating
   principally to the European and Australian fire protection contracting
   businesses, as well as the Grinnell flow control distribution operation.
   Operating income in 1992 included a restructuring and severance charge of
   $25.6 million relating to European fire products manufacturing, North
   American fire protection operations and corporate headquarters and Grinnell
   flow control distribution operations.

(3) Per share amounts have been restated to reflect a two-for-one stock split
   effected in the form of a stock dividend which was distributed on November
   14, 1995.

Selected ADT Historical Financial Information
(in millions, except per share amounts)

<TABLE>
<CAPTION>
                                        At or for the three
                                       months ended March 31,                    At or for the year ended December 31,
                                    ----------------------------         --------------------------------------------------------
                                        1997            1996              1996         1995        1994        1993        1992
                                    -------------    -----------         --------     --------    --------    --------    -------
<S>                                 <C>              <C>                 <C>          <C>         <C>         <C>         <C>
Income Statement Data:
Net sales                                  $460.7         $411.3         $1,704.0     $1,783.8    $1,629.4    $1,528.5    $1,552.2
Operating (loss) income (1).....             65.9         (686.8)          (765.5)       200.8       206.0       186.8       165.3
(Loss) income from continuing
 operations (2)(4)..............             35.0         (705.6)          (686.7)        31.0        82.6       110.7       159.1
Primary (loss) income per share
 from continuing operations
 (2)(3)(4)......................          0.23          (5.20)           (5.01)        0.22        0.51        0.74        1.19
Balance Sheet Data:
Total assets (5)................         $3,094.4                        $2,730.4     $3,419.7    $3,412.3    $3,477.4    $3,368.9
Long-term debt (including
 current portion)...............          1,057.1                         1,068.7      1,180.3     1,211.4       953.4     1,067.8
Total shareholders' equity......          1,086.8                           759.8      1,425.3     1,376.5     1,264.8     1,054.4
</TABLE>
_______________
(1) Operating loss in 1996 included restructuring and other non-recurring
charges of $237.3 million relating principally to the electronic security
services divisions in the United States and the United Kingdom, and a charge
of $744.7 million, which occurred in the three month period ended March 31,
1996, relating to the impairment of long-lived assets following the adoption
by ADT of Statement of Financial Accounting Standards No. 121 ("SFAS 121").
Operating income in 1995 included restructuring and other non-recurring
charges of $34.2 million relating principally to the United States electronic
security services division and to corporate restructuring in Europe.
Operating income in 1994 included restructuring and other non-recurring
charges of $4.5 million relating to corporate restructuring in Europe.

(2) In 1996 ADT recorded certain non-recurring items including (i) a non-cash
charge relating to the write-down of specific assets to their estimated fair
values in accordance with SFAS 121, (ii) a charge principally relating to
costs associated with integrating the businesses of Automated Security
(Holdings) PLC ("ASH") in the United Kingdom and the United States into ADT,
together with the costs of administrative, accounting, management information
and technological infrastructure enhancements currently being implemented in
the United States electronic security services division, (iii) a gain arising
on the sale of ADT's entire interest in Limelight Group plc, which was
recorded in the balance sheet at a nominal value and (iv) a gain represented
by cash receivable as a result of the settlement of ADT's litigation against
BDO Binder Hamlyn.  ADT's historical net income before these non-recurring
items amounted to $140.3 million, or $0.98 per share ($0.93 per share on a
fully diluted basis).

(3) For the three months ended March 31,1997 fully diluted income per share
from continuing operations was $0.22.

(4) In the three months ended March 31, 1997 ADT recorded certain
non-recurring charges in connection with the ADT-Tyco transaction and the
unsolicited proposals of Western.  ADT's historical net income before these
non-recurring items amounted to $44.6 million, or $0.30 per share ($0.28 per
share on a fully diluted basis).

In the three months ended March 31, 1996 ADT recorded certain non-recurring
charges which principally represented non-cash charges relating to the
write down of specific assets to their estimated fair values in accordance
with SFAS 121.  ADT's historical net income before these non-recurring
items amounted to $28.9 million, or $0.21 per share ($0.20 per share on a
fully diluted basis).

(5) Following the adoption of SFAS 121 during 1996, ADT recorded a charge of
$744.7 relating to the impairment of long-lived assets.
_______________
* ADT has not declared any dividends on ADT common shares since April 1991.

Selected Tyco and ADT Unaudited Pro Forma Combined Financial Information
(in millions, except per share amounts)

<TABLE>
<CAPTION>
                                                   At or for the three months ended
                                                               March 31,                   At or for the year ended December 31,
                                                   --------------------------------       ---------------------------------------
                                                      1997                   1996           1996          1995            1994
                                                   ---------              ---------       --------      --------        ---------
<S>                                                 <C>                   <C>             <C>             <C>           <C>
Income Statement Data:
Net sales..................................         $2,114.9              $1,668.9        $7,425.8        $6,626.6      $5,860.0
Operating (loss) income....................            260.8                (534.6)         (102.9)          724.6         601.9
(Loss) income from continuing operations...            141.7 (1)            (626.1)(1)      (338.6)(1)       304.0         266.3
(Loss) income per share from continuing
 operations (2)............................             0.61 (1)             (2.87)(1)       (1.53)(1)        1.39          1.18
Cash dividends per common share (3)........             0.03                  0.03            0.13            0.13          0.09

Balance Sheet Data:
Total assets...............................         $8,700.7
Long-term debt (including current portion).          1,896.0
Total shareholders' equity.................          3,857.6
</TABLE>

______________
(1) See notes (2) and (4) to "Selected ADT Historical Financial Information"
for information on ADT income before certain non-recurring items.  On a pro
forma combined basis, net income for 1996 before these non-recurring items
is $488.4 million, or $2.19 per share ($2.14 per share on a fully diluted
basis).  On a pro forma combined basis, net income for the three months
ended March 31, 1997 before these non-recurring items is $151.3 million, or
$0.65 per share ($0.64 per share on a fully diluted basis).  On a pro forma
combined basis, net income for the three months ended March 31, 1996 before
these non-recurring items is $108.4 million, or $0.50 per share ($0.48 per
share on a fully diluted basis).

(2) The unaudited pro forma combined per share data are based on ADT
shareholders, through a reverse stock split, holding 0.48133 of a share of the
combined company for each ADT common share held before the reverse stock split
and Tyco shareholders receiving one combined company common share for each
Tyco common share.

(3) Tyco currently pays quarterly dividends of $0.05 per Tyco common share.
ADT currently pays no dividends.  The combined company expects to continue
Tyco's dividend practice according to which it would pay quarterly dividends
of $0.05 per combined company common share, although this may be changed at
any time by the Board of Directors of the combined company.  The payment of
dividends by the combined company in the future will depend on business
conditions, the combined company's financial condition and earnings and other
factors.


<TABLE>
<CAPTION>
                                                                                             Tyco and ADT
                                                                                              Unaudited                   ADT
                                                                                              Pro Forma               Equivalent
                                                 Tyco Historical       ADT Historical         Combined                 Pro Forma
                                                  Per Share Data       Per Share Data       Per Share Data          Per Share Data
                                                 ---------------       --------------       --------------          --------------
<S>                                             <C>                    <C>                  <C>                     <C>
At or for the Three Months Ended March 31,
 1997
(Loss) income from continuing operations per
 common share................................           $0.67               $0.22                $0.60 (1)               $0.29 (1)
Cash dividends declared per common share.....            0.05                --                   0.03                    0.01
Book value per common share..................           17.06                6.93                16.23                    7.81

At or for the Year Ended December 31, 1996
(Loss) income from continuing operations per
 common share................................           $2.25              $(5.01)              $(1.53)(1)              $(0.74)(1)
Cash dividends declared per common share.....            0.20                --                   0.13                    0.06
Book value per common share..................           14.22                5.50                13.39                    6.45

At or for the Year Ended December 31, 1995
(Loss) income from continuing operations per
 common share................................           $1.79               $0.22                $1.39                   $0.67
Cash dividends declared per common share.....            0.20                --                   0.13                    0.06
Book value per common share..................           11.39               10.50                14.51                    6.98

At or for the Year Ended December 31, 1994
(Loss) income from continuing operations per
 common share................................           $1.24               $0.51                $1.18                   $0.57
Cash dividends declared per common share.....            0.20                --                   0.09                    0.04
Book value per common share..................           10.06               10.20                13.46                    6.48
</TABLE>

_______________
(1) See notes (2) and (4) to "Selected ADT Historical Financial Information"
   for information on ADT income per common share before certain non-recurring
   items.  On a pro forma combined basis, net income per share for 1996 before
   these non-recurring items is $2.19 ($2.14 per share on a fully diluted
   basis).  On an equivalent pro forma basis, net income per share for 1996
   before non-recurring items is $1.05 ($1.03 on a fully diluted basis).  On a
   pro forma combined basis, net income per share for the three months ended
   March 31, 1997 before these non-recurring items is $0.65 ($0.64 per share
   on a fully diluted basis).  On an equivalent pro forma basis, net income
   per share for the three months ended March 31, 1997 before these
   non-recurring items is $0.31 ($0.31 per share on a fully diluted basis).

(a) ADT has not declared any dividends on ADT common shares since April 1991.

(b) The information for Tyco for the years ended December 31, 1996, 1995 and
   1994 has been derived from Tyco's unaudited historical financial
   statements, which are incorporated by reference.  See "Where You Can Find
   More Information" on page 119.  This historical financial information has
   been adjusted to conform to ADT's fiscal year.

(c) The unaudited pro forma (loss) income and book value per share data are
   based on ADT shareholders, through a reverse stock split, holding 0.48133
   of a share of the combined company for each ADT common share held before
   the reverse stock split and Tyco shareholders receiving one combined
   company common share for each Tyco common share.

(d) The equivalent pro forma per share data are calculated by multiplying the
   unaudited pro forma combined per share data by 0.48133.

(e) The pro forma cash dividends declared are calculated by dividing the pro
   forma number of common shares of the combined company expected to be
   outstanding after the merger into the actual cash dividends declared by both
   companies.  Tyco currently pays quarterly dividends of $0.05 per Tyco
   common share.  ADT currently pays no dividends on ADT common shares.  The
   combined company expects to continue Tyco's dividend practice according to
   which it would pay quarterly dividends of $0.05 per share of the combined
   company, although this may be changed at any time by the Board of Directors
   of the combined company. The payment of dividends by the combined company
   in the future will depend on business conditions, the combined company's
   financial condition and earnings and other factors.

(f) The per share amounts for Tyco--Historical for 1995 and 1994 have been
   restated to reflect a two-for-one stock split effected in the form of a
   stock dividend which was distributed on November 14, 1995.



   
                                 RISK FACTORS

   Shareholders of Tyco International Ltd., a Massachusetts corporation
("Tyco"), in considering whether to approve (i) the merger (the "Merger") of
Limited Apache, Inc. ("Merger Subsidiary"), a Massachusetts corporation and a
wholly-owned subsidiary of ADT Limited, a Bermuda corporation ("ADT"), into
Tyco on the terms set forth in the Agreement and Plan of Merger dated as of
March 17, 1997 among Tyco, Merger Subsidiary and ADT (the "Merger Agreement")
and (ii) the Merger Agreement at a special meeting of shareholders (the "Tyco
Meeting"), and shareholders of ADT, in considering whether to approve the
matters related to the Merger on which they are being asked to vote at a
special general meeting of ADT's shareholders (the "ADT Meeting" and, together
with the Tyco Meeting, the "Meetings"), should consider carefully the
following investment considerations, as well as the other information included
and incorporated by reference in this Joint Proxy Statement/Prospectus.

   Taxability of exchange for Tyco shareholders.  Any gain on the exchange of
shares by U.S. shareholders of Tyco will be taxable for U.S. federal income
tax purposes.  Any loss on the exchange of shares by U.S. shareholders of Tyco
will not be recognized by those shareholders for U.S. federal income tax
purposes, and those shareholders will have a carryover basis in those shares.
See "Certain United States Federal Income, United Kingdom and Bermuda Tax
Consequences - United States - The Merger."

   Dilutive effect of the Merger on current shareholders' voting power.  After
the Merger, the current Tyco shareholders will own approximately 64% of the
outstanding common shares (the "Combined Company Common Shares") of ADT, as
the surviving public corporation following the Merger (as such, together with
its subsidiaries, the "Combined Company"), and the current ADT shareholders
will own approximately 36% of the Combined Company Common Shares.  This
represents substantial dilution of their current percentage voting power in
Tyco and ADT, respectively.

   Potentially dilutive effect of the Merger on Tyco's earnings per share.
Tyco expects that the earnings per share of the Combined Company (before
restructuring and similar charges) will not be dilutive to Tyco's shareholders
in comparison with Tyco's earnings per share.  See "The Merger --
Recommendation of the Tyco Board -- Information and Factors Considered by the
Tyco Board."  This expectation is subject to the risk that the Combined
Company will not achieve the synergies and cost savings expected to
result from the Merger and a successful integration of the businesses of the
two companies.  See "The Merger -- Tyco's and ADT's Reasons for the Merger."

   Integration of the operations of the two companies.  The Merger involves
the integration of two companies that have previously operated independently.
No assurance can be given that the Combined Company will integrate the
operations of Tyco and ADT without encountering difficulties or that the
benefits expected from such integration will be realized.  In addition, there
can be no assurance that the Combined Company will realize the expected
synergies from the Merger.  See "The Merger-- Tyco's and ADT's Reasons for the
Merger."

   Fixed Exchange Ratio and Reverse Stock Split Ratio despite potential
changes in stock prices.  Under the terms of the Merger Agreement, each Tyco
shareholder will receive one Combined Company Common Share and each ADT
shareholder will receive 0.48133 of a Combined Company Common Share after the
Merger, subject to adjustment under certain circumstances.  (See subsection
(xiii) under "The Merger Agreement--Termination of the Merger Agreement--Right
to Terminate" for a description ofely following the Merger will be governed by
the Exchange Ratio and the Reverse Stock Split Ratio, and will result in Tyco
shareholders owning approximately 64% of the outstanding Combined Company
Common Shares and ADT shareholders owing approximately 36% of the Combined
Company Common Shares.  These ratios were determined on the basis of the
closing price per share of Tyco common stock, par value $0.50 per share
("Tyco Common Shares") on the New York Stock Exchange ("NYSE") of $60 1/4 on
March 14, 1997, the business day preceding the first public announcement of
the Merger.  Because the Exchange Ratio and the Reverse Stock Split Ratio are
fixed, the interests of Tyco shareholders and ADT shareholders in the Combined
Company will not change even though the price of Tyco Common Shares at the
time of the Merger may differ from the price on March 14, 1997.  In
particular, Tyco shareholders will not receive a greater interest in the
Combined Company if the price per Tyco Common Share at the time of the Merger
is greater than $60 1/4, and ADT shareholders will not receive a greater
interest in the Combined Company if the price per Tyco Common Share at the
time of the Merger is less than $60 1/4.  However, both Tyco and ADT have the
right to terminate the Merger Agreement if the average price per Tyco Common
Share during for any ten consecutive days commencing after April 8, 1997 falls
below $56.  See subsection (xi) under "The Merger Agreement -- Termination of
the Merger Agreement -- Right to Terminate."  The price per Tyco Common Share
is likely to be different at the time of the Merger from its price on March
14, 1997 as a result of changes in the business, operations or prospects of
Tyco or ADT, regulatory considerations, general market and economic conditions
and other factors.  Moreover, shareholders should be aware that the
consummation of the Merger may occur at a date later than the date of the Tyco
and ADT Meetings.  Accordingly, there can be no assurance that the price of
Tyco Common Shares on the date of the Meetings will equal its price at the
time of the consummation of the Merger.  Tyco shareholders and ADT
shareholders are urged to obtain current market quotations for Tyco Common
Shares and the common shares of ADT, par value $0.10 per share ("ADT Common
Shares").

   Risks to Tyco shareholders of being shareholders of a Bermuda corporation.
Upon the consummation of the Merger, shareholders of Tyco, a Massachusetts
corporation, will become shareholders of the Combined Company, a Bermuda
company.  There are significant differences between the corporate laws of
Bermuda and those of Massachusetts.  See "Comparison of Shareholder Rights."
These differences may materially affect the rights of Tyco shareholders.
    



                                THE MERGER

General

   
     Tyco and ADT are furnishing this Joint Proxy Statement/Prospectus to
holders of Tyco Common Shares and holders of ADT Common Shares in
connection with the solicitation of proxies by the Board of Directors of
Tyco (the "Tyco Board") at the Tyco Meeting and by the Board of Directors
of ADT (the "ADT Board") at the ADT Meeting, and at any adjournments or
postponements of these meetings.

     At the Tyco Meeting, holders of Tyco Common Shares will be
asked to vote upon a proposal to approve the Merger Agreement and the Merger.
A copy of the Merger Agreement is attached hereto as Annex I.
    

     At the ADT Meeting, holders of ADT Common Shares will be asked
to vote upon the following proposals (the "ADT Merger Proposals"), all
conditioned on the effectiveness of the Merger:

     o  to approve the issuance of new common shares of ADT, par
        value $0.20 per share ("New ADT Common Shares"), in the Merger;

   
     o  to approve the reverse stock split (the "Reverse Stock Split") of
        the existing ADT Common Shares into New ADT Common Shares in the
        ratio (the "Reverse Stock Split Ratio") of 0.48133 of a New ADT
        Common Share (subject to adjustment under certain circumstances)
        for each outstanding ADT Common Share (the "Reverse Stock Split
        Proposal");

     o  to increase (the "Share Amendment") the number of authorized New ADT
        Common Shares to 750,000,000 shares and to approve the issuance of
        those shares (the "Share Amendment Proposal" and, together with the
        Reverse Stock Split Proposal, the "Recapitalization Proposal");

     o  to expand the ADT Board to eleven directors, to remove all
        but three of the current directors of ADT and to elect (the "New
        Directors Election") eight new directors of ADT (the "New Directors
        Proposal"); and
    

     o  to change the name of ADT to Tyco International Ltd.  (the
        "ADT Name Change" or the "ADT Name Change Proposal").

   
     At the ADT Meeting, holders of ADT Common Shares will also be asked to
vote upon proposals (i) to approve amendments to the ADT Limited 1993 Long
Term Incentive Plan and to ratify and approve the grant of all share
options pursuant to that plan and ADT's other share option and incentive
plans and, subject to the Merger becoming effective, the assumption by ADT
of Tyco's obligations under its share option and incentive plans and
warrants, (the "Option and Warrant Proposal") and (ii) subject to approval
of the ADT Merger Proposals by the shareholders of ADT, to amend the Bye-
Laws of ADT (the "ADT Bye-Laws") relating to the adjournment of
shareholders' meetings (the "ADT Bye-Law Amendment Proposal" and together
with the Option and Warrant Proposal, the "Other ADT Meeting Proposals").
The Merger is not conditioned on the Other ADT Meeting Proposals.

     If the Merger and the ADT Merger Proposals are approved,
following the Merger Tyco will become a wholly-owned subsidiary of ADT, and
ADT will be renamed Tyco International Ltd.  (Tyco, as the surviving
corporation in its merger with Merger Subsidiary, is referred to as the
"Surviving Corporation.")  The Merger will become effective at the time
Articles of Merger are accepted for filing by the Secretary of State of The
Commonwealth of Massachusetts, which is expected to occur as promptly as
practicable after the last of the conditions to the Merger has been satisfied
or waived, unless Tyco and ADT agree on a different date.  The time at which
the Merger becomes effective is referred to as the "Effective Time."
    

Background of the Merger

   
     Background of the Merger.  At the time that ADT entered into
the Merger Agreement on March 17, 1997, ADT was the subject of a hostile
exchange offer (the "Western Offer") for all of the outstanding ADT Common
Shares not already owned by Western Resources, Inc., a Kansas utility, and its
affiliates (together "Western").  This offer was announced by Western on
December 18, 1996.  On March 3, 1997, ADT filed a Schedule 14D-9 stating that
the ADT Board had determined that the Western Offer was inadequate and
recommending that ADT shareholders not accept the Western Offer or vote for
certain shareholder proposals made by Western.  For further information on the
Western Offer, see "The Western Offer and Certain Other Events" below.
    

     On March 4, 1997, Michael A. Ashcroft, Chairman and Chief
Executive Officer of ADT, telephoned L. Dennis Kozlowski, Chairman, Chief
Executive Officer and President of Tyco, to ask if Tyco would be interested in
meeting with ADT.  In a brief conversation, Messrs. Ashcroft and Kozlowski
agreed to meet on Wednesday, March 5.

     On March 5, 1997, Messrs. Ashcroft and Kozlowski met in New
York.  Mr. Ashcroft described the Western Offer, and Mr. Ashcroft and Mr.
Kozlowski generally discussed the businesses of ADT and Tyco.  Mr. Ashcroft
asked Mr. Kozlowski if Tyco would have any interest in discussing a possible
transaction between ADT and Tyco.  Mr. Kozlowski indicated that Tyco would
have to perform initial due diligence on ADT before Tyco could determine if it
would have any interest in entering into discussions with ADT.

   
     On March 8 and March 9, 1997, representatives from Tyco visited
the offices of ADT's subsidiaries to review due diligence materials assembled
by ADT and to have due diligence discussions with senior management of ADT.

     On March 10, 1997, Mr. Ashcroft and Stephen J. Ruzika, Chief
Financial Officer of ADT, met with Mr. Kozlowski and Mark H. Swartz, Chief
Financial Officer of Tyco, at the offices of ADT's North American
subsidiaries.  Mr. Kozlowski informed Mr. Ashcroft that Tyco was continuing to
examine a number of issues internally and needed to complete due diligence to
determine if Tyco would consider making a proposal.  Messrs. Ashcroft and
Kozlowski arranged to meet on Thursday, March 13.
    

     On March 11, 1997, the Tyco Board held a telephonic meeting and
heard a status presentation by Mr. Kozlowski on the contacts with ADT.  On
March 12, 1997, the ADT Board held a telephonic meeting, and Mr. Ashcroft
described his contacts with Tyco and Tyco's due diligence efforts to that
point.

     On March 13, 1997, Mr. Ashcroft met with Mr. Kozlowski at Tyco's
offices in New York.  Messrs. Ashcroft and Kozlowski discussed Tyco's due
diligence efforts to that point and the possible synergies that could
result from a combination of the businesses of the two companies.  On March
14, 1997, Mr. Kozlowski reported to the Tyco Board in a telephonic meeting
on the continuing discussions with ADT.

   
     On March 15, 1997, Messrs. Ashcroft and Ruzika of ADT met with
Messrs. Kozlowski and Swartz of Tyco at Tyco's offices.  Messrs. Ashcroft and
Kozlowski agreed to meet the following morning to discuss the terms of a
possible transaction.  Also on March 15, 1997, the ADT Board held a telephonic
meeting.  Mr. Ashcroft briefed the ADT Board on the discussions to that point
and on the status of due diligence conducted by the two companies.  Mr.
Ashcroft also reported on his planned meeting with Mr. Kozlowski in the
morning.
    

     On March 16, 1997, Messrs. Ashcroft and Kozlowski met in New
York at Tyco's offices.  During this meeting, Messrs. Ashcroft and Kozlowski
negotiated the structure and economic terms of a proposed transaction.  Both
Messrs. Ashcroft and Kozlowski agreed to recommend such a transaction to their
respective boards of directors at meetings later that day.

   
     In the afternoon of March 16, the Tyco Board held a meeting at
which Mr. Kozlowski and other members of Tyco's senior management presented
the terms of the proposed transaction with ADT.  Credit Suisse First Boston
Corporation ("Credit Suisse First Boston"), Tyco's financial advisor,
presented its financial analysis of the proposed transaction and delivered its
written opinion, dated March 16, 1997,  that, based upon and subject to the
factors and assumptions set forth therein, as of such date, the ratio of one
Combined Company Common Share for each Tyco Common Share, after the Reverse
Stock Split, was fair from a financial point of view to the shareholders of
Tyco.  See "Role of Financial Advisors -- Opinion of Tyco's Financial
Advisor."  After careful consideration, the Tyco Board unanimously approved
the proposed transaction and authorized Messrs. Kozlowski and Swartz to
complete the negotiation of open terms.

     In the evening on March 16, the ADT Board held a telephonic
meeting.  Mr. Ashcroft described the terms of the transaction as negotiated
with Mr. Kozlowski.  Merrill Lynch, Pierce Fenner & Smith Incorporated
("Merrill Lynch"), ADT's financial advisor, rendered its oral opinion that the
Exchange Ratio was fair to ADT shareholders from a financial point of view.
See "Role of Financial Advisors--Opinion of ADT's Financial Advisor."  ADT's
counsel discussed legal issues relating to the transaction.  After careful
consideration, the ADT Board unanimously approved the transaction.
    

     Later that evening, representatives of Tyco and ADT and the
parties' legal counsel met or spoke by telephone to resolve certain remaining
legal issues relating to the Merger Agreement.  The agreement between ADT and
Tyco was executed in the early morning of March 17, and the transaction was
publicly announced that morning before the opening of business.

   
     The Western Offer and Certain Other Events.  According to
Amendment No. 10 to Western's Schedule 13D with respect to ADT filed with the
SEC on March 17, 1997 (together with earlier amendments, the "Western Schedule
13D"), Western is currently the beneficial owner of 38,287,111 ADT Common
Shares (including 14,115 ADT Common Shares issuable upon exchange of 500 of
ADT's Liquid Yield Option[Trademark] Notes ("LYONs")).  This constitutes
approximately 24.9% of the total number of ADT Common Shares currently issued
and outstanding.
    

     Since Western began acquiring its ADT Common Shares in early
1996, direct contacts between ADT and Western have been limited and have not
included discussions of a business combination.  Senior representatives of ADT
and Western have met on only one occasion, in early 1996.  On that occasion,
Mr. Ashcroft and one other ADT director met with representatives of Western to
discuss possible joint marketing opportunities relating to certain energy
products.  However, before substantive discussions could commence on the
feasibility of a joint marketing program, it was essential to resolve the
issues arising from the fact that Western is a competitor of ADT in the
security marketplace.  No substantive proposals were put forward by Western,
and no further discussions on this topic were held.  In May 1996, Western's
Chairman made one brief call to Mr. Ashcroft to attempt to arrange a
subsequent meeting.  In that call, Western's Chairman mentioned the
possibility of a business combination with ADT.  However, Western never came
forward with any proposal regarding any such business combination, and no
further meetings were held.

     Western notified ADT, by letter dated April 2, 1996, of its
intention to vote its shares in opposition to the proposed amendment to ADT's
1993 Long Term Incentive Plan (the "Plan Amendment") at ADT's annual general
meeting (the "Annual Meeting") on April 11, 1996 and urged the ADT Board to
consider withdrawing it from consideration at the Annual Meeting.  The ADT
Board did not withdraw the Plan Amendment, and ADT's shareholders duly
approved it at the Annual Meeting.

   
     On July 1, 1996, ADT entered into an amalgamation agreement
with Republic Industries, Inc. ("Republic"), pursuant to which Republic was to
enter into an amalgamation with ADT (the "Republic Merger").  In connection
with the Republic Merger, ADT issued to Republic a share purchase warrant for
15,000,000 ADT Common Shares (the "Republic Warrant").  On that same day, Mr.
Ashcroft telephoned Western's Chairman to inform him of the proposed Republic
Merger.  On July 12, 1996, the Western Schedule 13D was amended to indicate
that Western might determine to oppose the Republic Merger and might choose
to exercise its appraisal rights under Bermuda law, although no final decision
had yet been taken.  On September 13, 1996, the Western Schedule 13D was
amended to indicate that Western had determined to oppose the proposed
Republic Merger.  The termination of the proposed Republic Merger was
announced on September 30, 1996.

     On December 18, 1996, Western notified ADT of its intention to
file with the SEC a preliminary prospectus for the Western Offer.  On December
18, 1996, Western filed a notice with ADT to requisition a special general
meeting of ADT's shareholders to consider proposals to remove the current
members of the ADT Board, reduce the size of the ADT Board to two and elect
two officers of Western as directors (the "Western Proposals").  Western has
stated that the purpose of the Western Proposals is to facilitate consummation
of the Western Offer.  Western has stated that its directors, if elected,
intend to eliminate the anti-takeover defenses contained in ADT's Bye-Laws
(the "ADT Bye-Laws") and ADT's Rights Agreement dated as of November 6, 1996,
as amended (the "ADT Shareholders Rights Plan").  The ADT Board believes
Western's attempt to complete its offer in this manner is not in the best
interests of ADT shareholders.  On January 6, 1997, the ADT Board met to
consider the Western Proposals and the Western Offer and set the date for
ADT's special general meeting of shareholders to consider the Western
Proposals as July 8, 1997 (the "Western Proposals Meeting").

     On January 27, 1997, Western issued a press release announcing
that on December 23, 1996 Western had made its required filing under the U.S.
Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the "HSR
Act"), with regard to the Western Offer, and that on January 23, 1997 the
30-day waiting period required under the HSR Act had expired with no action
being taken by the antitrust authorities.
    

     On February 7, 1997, Western and Kansas City Power & Light
("KCP&L"), a utility based in Missouri, issued a joint press release
announcing that the two companies had entered into an Agreement and Plan of
Merger (the "Western/KCP&L Merger Agreement") pursuant to which KCP&L would
merge with and into Western.  Under the terms of the Western/KCP&L Merger
Agreement, subject to certain conditions, each share of KCP&L common stock
would be converted into a number of shares of Western common stock, and
Western would be the surviving corporation.

   
     Pursuant to a request by Republic, on February 10, 1997, ADT
filed a registration statement with the SEC on Form S-3 registering, among
other shares, the 15,000,000 ADT Common Shares to be issued under the Republic
Warrant.
    

     On February 27, 1997, the ADT Board met to review and
deliberate on the terms of the Western Offer with its legal and financial
advisors, as well as to consider certain other items of business, but did not
take any action on the Western Offer.  On March 2, 1997, the ADT Board again
met with its legal and financial advisors and concluded that the Western Offer
as of that date was inadequate.

     On March 3, 1997, Western issued a press release (the "March
3rd Press Release") in which it announced an intention to change the mix of
consideration payable pursuant to the Western Offer, but without changing the
maximum value of such consideration.  Prior to the March 3rd Press Release,
Western, in its Preliminary Prospectus, had stated that it intended to
commence the Western Offer, upon the terms and subject to the conditions set
forth in the Western Registration Statement on Form S-4 (the "Western S-4")
and in a related Letter of Transmittal, to exchange $7.50 net in cash and a
number of shares of Western common stock valued at a maximum of $15 (depending
on a pricing formula) for each of the ADT Common Shares validly tendered in
the Western Offer.  In the March 3rd Press Release, Western announced that it
intended to amend the Western Offer to increase the cash portion of its offer
to $10.00 per ADT Common Share and to decrease the number of shares of Western
common stock so that the maximum value of the shares of Western common stock
exchangeable for each ADT Common Share would be $12.50.  The March 3rd Press
Release stated that based on the closing price of Western's common stock on
February 28, 1997, ADT shareholders would receive $10.00 in cash plus 0.41322
of a share of Western common stock for each ADT Common Share pursuant to the
Western Offer.  The precise formula for determining the number of shares of
Western common stock to be exchanged for each ADT Common Share pursuant to the
Western Offer was not set forth in the March 3rd Press Release.  However, the
press release did state that ADT shareholders would not receive more than
0.42017 of a share of Western common stock for each ADT Common Share.

     On March 3, 1997, the ADT Board met again with its legal and
financial advisors and unanimously concluded that the Western Offer, as
amended by the March 3rd Press Release, was inadequate.  ADT filed a Schedule
14D-9 setting forth some of the factors the ADT Board considered in reaching
its conclusion.

     In order to implement the ADT Board's original intentions in
adopting the ADT Shareholders Rights Plan, on March 2, 1997 the ADT Board
resolved to effect certain changes to the ADT Shareholders Rights Plan as set
forth in the First Amendment to Rights Agreement, dated as of March 3, 1997
(the "Rights Plan Amendment").  The Rights Plan Amendment limits the ability
to redeem or revoke the rights issued under the ADT Shareholders Rights Plan
(the "Rights") by, among other things, (i) amending the definition of a
continuing director on the ADT Board ("Continuing Director") to exclude
persons elected to the ADT Board as a result of a proxy solicitation or
similar shareholder initiative if any participant in such initiative has
stated (or a majority of the ADT Board has determined in good faith) that such
participant (or its affiliates or associates) intends to take, or may consider
taking, any action that would result in (a) that person becoming a person
(other than ADT or any employee benefit plan of ADT) that has acquired
beneficial ownership of 15% or more of the ADT Common Shares issued and
outstanding (or, in the case of any person that beneficially owned more than
15% of the ADT Common Shares on November 4, 1996, that person acquiring more
than such person owned as of such date) or (b) a merger, consolidation, or
sale of a majority of the assets or voting power of ADT which causes the
rights to be triggered and (ii) expanding the circumstances in which
supplements, deletions or amendments to the ADT Shareholders Rights Plan must
be approved by a majority of Continuing Directors.  If the Western Proposals
were adopted so that the only members of the ADT Board were the Western
nominees, there would be no Continuing Directors on the ADT Board.  As a
result of the Rights Plan Amendment, the Western nominees would be unable to
amend the ADT Shareholders Rights Plan or redeem the Rights, which would
negatively affect the ability of Western to complete the Western Offer.

     On March 17, 1997 Western commenced the Western Offer and
stated that it had mailed a prospectus for the Western Offer and a proxy
statement for the Western Proposals to holders of ADT Common Shares.  On the
same day, Tyco and ADT announced the Merger.  See "--Background of the Merger."

   
     On March 18, 1997, Mr. Ashcroft made a brief courtesy call to
Western's Chairman to confirm that Western's Chairman was aware of the
recently announced Merger.  In that call, Mr. Ashcroft mentioned that, in
light of the Merger, which would be of benefit to all ADT shareholders
including Western, ADT would be willing to work with Western toward a mutually
agreeable resolution of any outstanding issues in a manner consistent with the
Merger.  Western's Chairman indicated that he would consider the proposal.

     On March 21, 1997, ADT and Republic announced that Republic through
Triangle Corporation, a Delaware corporation and a wholly owned subsidiary
of Republic, had exercised the Republic Warrant, purchasing 15,000,000 ADT
Common Shares at $20 per share.  On May 7, 1997, Republic announced that
it had sold such shares to five institutions.

     On March 28, 1997, the ADT Board resolved, by unanimous written
consent, to extend the Distribution Date (as defined in the ADT Shareholders
Rights Plan) for the Rights until August 15, 1997 or such earlier date as may
be determined by the ADT Board.  On April 23, 1997, the ADT Board resolved, by
unanimous written consent, that (i) with respect to the Western Offer only,
and provided that the Western Offer remains subject to the same terms and
conditions as those prevailing on March 17, 1997, the Distribution Date for the
Rights shall be June 17, 1997, or such earlier date as may be determined by
the Board and (ii) the Distribution Date in any other circumstances shall be
the date as provided for in the Rights Plan.

     On March 28, 1997, ADT Investments, Inc. ("ADT Investments"), a
wholly owned subsidiary of ADT and a record holder of Western common stock,
served a demand on Western, pursuant to Section 17-6510 of the Kansas General
Corporation Code, that Western provide ADT Investments with, among other
things, a complete record or list of stockholders of Western as of the record
date for determining stockholders entitled to vote (the "Record Date") at the
special meeting of Western's stockholders then scheduled for April 24, 1997 or
as of a recent date if a Record Date list was not available.  Such special
meeting is currently scheduled for June 17, 1997.  Western has refused ADT
Investments' demand.  ADT Investments is pursuing its remedies under Section
17-6510 of the Kansas General Corporation Code, including, on April 8, 1997,
filing a petition in the District Court of Shawnee County, Kansas
(the "Kansas Court") for a summary order to compel Western to comply with
ADT Investments' demand.  On April 24, 1997, ADT Investments served an
additional demand on Western, pursuant to Section 17-6510 of the Kansas
General Corporation Code, that Western provide ADT Investments with, among
other things, a complete record or list of stockholders of Western as of
the record date for determining stockholders entitled to vote at the annual
meeting of Western's stockholders scheduled for May 29, 1997.  By letter
dated April 28, 1997 Western refused ADT Investments' demand.  On May 7,
1997, the Kansas Court ordered Western to provide ADT Investments with a
list of all of Western's stockholders on or before May 9, 1997.

     On April 10, 1997, ADT Investments II, Inc. ("ADT Investments
II"), a wholly owned subsidiary of ADT and a record holder of KCP&L common
stock, served a demand on KCP&L, pursuant to Section 351.215 of the Missouri
General and Business Corporation Law and Article VIII of KCP&L's By-Laws, that
certain corporate books and records, including, inter alia, a complete record
or list of shareholders of KCP&L as of a recent date, be made available for
inspection by ADT Investments II, or that copies be delivered to ADT
Investments II's agents for inspection.  By letter dated April 14, 1997, KCP&L
refused ADT Investments II's demand.
    

     Certain Litigation.  On December 18, 1996, Westar Capital, Inc.
("WCI"), a subsidiary of Western, filed a complaint in the U.S. District Court
for the Southern District of Florida (the "Court") against ADT, the directors
of ADT and Republic.  The complaint alleged that ADT and its directors
breached their fiduciary duties to WCI and ADT's other shareholders (i) by
issuing to Republic the Republic Warrant in connection with the Republic
Merger, (ii) by adopting the ADT Shareholders Rights Plan and (iii) by holding
shares of ADT in one of ADT's subsidiaries with the intention of voting those
shares as needed to entrench existing management.  The complaint sought a
court order (i) declaring the Republic Warrant null and void or preventing ADT
and Republic from exercising their rights under the Republic Warrant, (ii)
directing ADT to redeem the ADT Shareholders Rights Plan, and (iii) preventing
ADT from voting the shares held by its subsidiary.  On December 23, 1996, the
Court entered an order dismissing the complaint without prejudice on the
grounds that the complaint contained inadequate and improper allegations
relating to the Court's jurisdiction over the case.

     On December 27, 1996, WCI filed a second complaint with the
Court which contained modified allegations relating to the Court's
jurisdiction and identical substantive allegations as the prior complaint.  On
January 3, 1997, WCI filed an amended complaint which, in addition to the
allegations made in the prior complaints, alleged that ADT and its directors
have attempted to interfere with WCI's voting rights by seeking certain
information from WCI pursuant to procedures established under the ADT
Bye-Laws.  The amended complaint sought the same relief as the prior
complaints and also requested that the Court confirm WCI's voting rights.

     On January 21, 1997, the Court granted WCI leave to file a
second amended complaint.  The second amended complaint contained the same
allegations as the amended complaint and in addition alleged (i) that ADT and
its directors breached their fiduciary duties by setting a July 8, 1997 date
for the Western Proposals Meeting, and (ii) that ADT and its directors
violated Section 14(d) of the U.S. Securities Exchange Act of 1934, as amended
(the "Exchange Act"), by making a recommendation to ADT's shareholders
regarding the tender offer without first making certain filings with the SEC.
WCI asked for a court order (i) enjoining ADT from holding the Western
Proposals Meeting on July 8, 1997, (ii) compelling ADT to hold the Western
Proposals Meeting on or before March 20, 1997, and (iii) declaring that ADT
had violated Section 14(d) and enjoining ADT from making any further
recommendations relating to the tender offer until the required SEC filings
are made.

     On January 23, 1997, WCI filed a motion for a preliminary
injunction asking the Court to enjoin ADT from holding the Western Proposals
Meeting on July 8, 1997, and compelling ADT to hold the Western Proposals
Meeting on or before March 20, 1997.  ADT and its directors have filed papers
in opposition to WCI's motion.  On March 4, 1997, WCI filed a supplemental
brief in support of its motion for a preliminary injunction representing that
WCI is no longer seeking a Western Proposals Meeting on or before March 20,
1997 on the grounds that such a meeting date would now be impractical.  In its
supplemental brief, WCI requests that the meeting date be set 30 days after
its proxy materials for the Western Proposals Meeting are distributed.  ADT
and its directors have responded to this supplemental motion.  As of the date
of this Joint Proxy Statement/Prospectus, the Court has not rendered any
decision with respect to plaintiff's motion for a preliminary injunction.

     On January 27, 1997, ADT and its directors filed a motion to
dismiss the second amended complaint based on, among other things, the Court's
lack of personal jurisdiction over ADT and its directors and for failure to
state a claim upon which relief can be granted.  On February 21, 1997, the
Court entered an order ruling that the second amended complaint did not
adequately plead personal jurisdiction over the ADT defendants. On February
27, 1997, WCI filed a third amended complaint.  The third amended complaint
contained the same allegations as the second amended complaint and contained
additional allegations relating to personal jurisdiction.

     On February 19, 1997, WCI filed a motion for an expedited trial
on its claims relating to the Republic Warrant and the shares of ADT held by
one of ADT's subsidiaries.  WCI also requested that the Court enter an order
providing that it be given five days' notice before the Republic Warrant is
exercised.  On March 12, 1997, the Court denied that motion.

     On March 11, 1997, the Court granted WCI leave to file a fourth
amended complaint.  The fourth amended complaint contains the same allegations
as those in the third amended complaint as well as additional allegations
relating to the Rights Plan Amendment.  In addition to the relief previously
requested, the fourth amended complaint seeks judicial nullification of the
Rights Plan Amendment and a rescission of actions by ADT if shown that a
subsidiary of ADT cast decisive votes as a shareholder with respect to those
actions.

   
     On March 17, 1997, ADT and its directors filed a motion to
dismiss the fourth amended complaint based on, among other things, the Court's
lack of personal jurisdiction over ADT and its directors and for failure to
state a claim upon which relief can be granted.  This motion has been fully
briefed and awaits a decision of the Court.  ADT and the ADT Board believe
that the allegations in the WCI's fourth amended complaint are without merit
and intend vigorously to defend against them.

     On March 24, 1997, WCI filed a motion for a preliminary
injunction (i) preventing Republic from selling or transferring any ADT Common
Shares issued upon the exercise of the Republic Warrant and (ii) preventing
the Chairman of ADT from exercising the proxy on those shares.  On April 7,
1997, ADT and the ADT Board filed papers in opposition to this motion.  ADT
and the ADT Board believe that the motion is meritless and intend to
vigorously oppose it.

     On April 16, 1997, WCI filed a petition with the Supreme Court
of Bermuda (the "Bermuda Court")  in which WCI alleges that the Merger has
been structured in order to deprive WCI and ADT's other shareholders of their
appraisal rights under Section 106 of the Bermuda Companies Act (the "Act")
applicable to an amalgamation under the Act.  Although ADT is acquiring
Tyco in the transaction, WCI maintains that in actuality Tyco is acquiring ADT
and that the transaction should be treated as an amalgamation between ADT and
Tyco which would trigger appraisal rights under Bermuda law.  WCI alleges that
ADT's actions are oppressive and prejudicial to it.  WCI asks the Bermuda
Court to order that the Merger be enjoined unless ADT's shareholders are
permitted to exercise all rights they would be entitled to, including
appraisal rights, if the transaction between ADT and Tyco were an amalgamation
under Bermuda law.   In order for WCI's petition to prevail, the Bermuda Court
must be of the opinion that the Merger has been structured in a manner that
is oppressive or prejudicial to the interests of WCI and that the facts
would justify the making of a winding up order against ADT on the ground
that it was just and equitable that ADT should be wound up, but that to
wind up ADT would unfairly prejudice WCI.  It is ADT's belief that one of
the reasons that WCI has filed the petition seeking to enjoin the Merger
unless the Merger is structured to provide that ADT shareholders can
exercise appraisal rights is to raise questions as to whether the
Merger will qualify for accounting treatment as a pooling of interests.  See
"The Merger Agreement -- Conditions to the Merger -- Conditions to Each
Party's Obligations to Effect the Merger."  However, ADT believes that the
allegations in WCI's petition are without merit and intends to vigorously
defend against them.  On April 23, 1997, ADT filed a motion to strike out
WCI's petition with the Bermuda Court on the grounds that (i) the petition
discloses no reasonable cause of action, (ii) the petition is frivolous,
embarrassing and vexatious and (iii) the petition is otherwise an abuse of
the process of the Bermuda Court.  A hearing on the motion to strike has
been scheduled for June 12 and 13, 1997.
    

     On December 26, 1996, Charles Gachot filed a complaint in the
Florida Circuit Court for the Fifteenth Judicial Circuit in Palm Beach County,
Florida against ADT, certain of its present and former directors, Western and
WCI.  The complaint was brought on behalf of a class of all shareholders of
ADT and alleges that Western and WCI have breached their fiduciary duties to
ADT's shareholders by offering an inadequate price for the outstanding ADT
Common Shares.  The complaint seeks to enjoin Western and WCI from acquiring
the outstanding ADT Common Shares.  The complaint also alleges that ADT and
its directors have refused to negotiate with Western and WCI and that the
Republic Warrant and the ADT Shareholders Rights Plan are improper.  The
complaint seeks unspecified monetary relief from all defendants.  ADT and the
ADT Board believe that the allegations in Gachot's complaint against ADT and
the directors are without merit and intend vigorously to defend against them.

   
     On February 7, 1997, ADT Operations, Inc. ("ADT Operations"), a
subsidiary of ADT, filed a complaint in the Supreme Court of the State of New
York, County of New York against The Chase Manhattan Bank, N.A. ("Chase").
The complaint states that Chase has been an important lender and financial
advisor to ADT Operations since 1993 and that, in the course of this business
relationship, ADT Operations has disclosed confidential business information
to Chase.  The complaint asserts that ADT Operations and Chase expressly
agreed that Chase would not aid any third party in a hostile takeover bid for
ADT.  The complaint alleges that Chase is currently aiding Western in its
attempt to take control of ADT and that Chase's actions constitute:  (i) a
breach of an express agreement between Chase and ADT Operations; (ii) a breach
of the implied covenant of good faith that is part of the express agreement
between Chase and ADT Operations; and (iii) a breach of the fiduciary duties
that Chase owes to ADT Operations.  The complaint further alleges that Chase
breached a confidentiality agreement with ADT Operations by providing Western
with confidential and proprietary information about ADT Operations and ADT and
by using such information in assessing whether to aid Western in Western's
hostile takeover bid.  The complaint also alleges that Chase negligently and/or
fraudulently failed to disclose to ADT Operations that Chase was advising
Western regarding a possible hostile takeover bid for ADT.  The complaint
seeks $50 million in monetary damages.  The complaint also seeks to enjoin
Chase from advising, funding, or participating in Western's attempts to take
control of ADT and from disclosing any confidential information regarding ADT
Operations and ADT.  On March 3, 1997, Chase filed a motion for dismissal of
ADT Operations' complaint or, alternatively, summary judgment.  This motion,
originally  scheduled to be heard on April 11, 1997, has been adjourned and
will be heard not earlier than May 19, 1997.

     On February 7, 1997, ADT Operations filed a motion for a
preliminary injunction, seeking to enjoin Chase from: (i) advising, funding,
or assisting Western in its efforts to take over ADT or participating in these
efforts; and (ii) using or disclosing any confidential information that ADT
Operations provided to Chase.  In addition, ADT Operations has sought
expedited discovery on issues regarding the preliminary injunction.  On
February 19, 1997, Chase filed papers in opposition to this motion.  The
motion was argued before the court on February 24, 1997 and is currently
pending.  As a result of a hearing held on March 25, 1997, ADT was granted the
right to take three depositions and obtain certain documents from Chase.
    

     On March 11, 1997, Crandon Capital Partners ("CCP") filed a
complaint in the Florida Circuit Court for the Fifteenth Judicial Circuit in
Palm Beach County, Florida against ADT, certain of its current and former
directors, and Republic.  The complaint was brought by CCP in a derivative
capacity on behalf of ADT.  The complaint alleges that ADT's directors
breached their fiduciary duties and wasted corporate assets in connection with
(i) the granting of options to certain officers of ADT in 1996, (ii) the
issuance of the Republic Warrant, (iii) the implementation of the ADT
Shareholders Rights Plan and (iv) the harassment and attempted
disenfranchisement of WCI.  The complaint seeks an unspecified amount of
damages and a court order directing ADT's directors to establish a system of
internal controls to prevent repetition of the alleged breaches of fiduciary
duty and corporate waste.

     ADT and its directors believe that the allegations in the
complaint brought by CCP are without merit and intend vigorously to defend
against them.

Tyco's and ADT's Reasons for the Merger

     The Boards of Tyco and ADT believe that the Merger will create
the premier company in fire protection and electronic security  that will be
well positioned to improve the leadership positions of Tyco and ADT in the
market for these services and related products.  The Merger should provide
opportunities to achieve substantial benefits for Tyco and ADT shareholders
that might not otherwise be available.  The Combined Company is expected to
have the financial resources, management, personnel and expertise to better
serve the existing customers of Tyco and ADT and to capitalize on growth
opportunities in the fire safety and electronic security markets.

     The Boards believe that the Merger will provide the following benefits:

   
     o  Attractive Marketplace.  Both the fire safety market, in which Tyco
        is active, and the electronic security services market, in which
        ADT is active, remain highly fragmented with substantial potential
        for growth.  The Combined Company will be in a position to exploit
        this growth opportunity by providing a complete array of fire
        protection and electronic security products and services.  These
        products and services include fire protection sprinkler systems,
        fire detection systems, intruder alarm systems and access control
        systems, as well as the related inspection and monitoring services.
        In the commercial and industrial markets, the combination is
        expected to enhance service to existing accounts, generate
        incremental revenues from this customer base, and attract new
        customers interested in the efficiencies of a single source for
        their fire safety and security needs.  ADT's electronic security
        service operations are expected to benefit particularly from access
        to Tyco's strong worldwide presence in fire protection services.
        In the residential market, where ADT has already been achieving
        substantial gains, the Merger is expected to provide a platform for
        acquisitions and facilitate an expansion of Tyco's activity in
        residential fire protection systems and safety services.

     o  Strong Recurring Revenue Base.  Tyco has enhanced its recurring
        revenue stream by increasing the service and inspection portion of
        its fire protection business.  ADT's contractually recurring
        revenue base currently is in excess of $950 million annually.  This
        stable revenue stream should help the Combined Company to finance
        its operations, capital expenditures and dividends, assist the
        Combined Company in maintaining a superior credit rating and
        provide financial flexibility for acquisitions.  It should also
        mitigate the cyclicality of Tyco's fire protection installation
        business.

     o  Synergies and Savings.  The Merger is expected to provide
        opportunities for savings in operating expenses, corporate overhead
        and taxes.  It is expected that Tyco and ADT will be able to
        consolidate certain operating locations, combine central station
        monitoring activities, leverage on company-wide purchasing power
        and eliminate duplicative corporate functions.  In addition, with
        ADT as the continuing parent corporation, the Merger is expected to
        provide opportunities for tax savings.  Total annual after-tax
        savings and synergies are estimated at $53 million in the first
        year and $95 million in each of the next two years.  These savings
        will initially be offset by special, non-recurring restructuring
        and other integration charges after the Merger, which charges are
        currently estimated at approximately $600 million.

     o  Strong Management Team.  A strong management team drawn from
        both companies will manage the Combined Company.  L. Dennis
        Kozlowski, who has been Chairman, Chief Executive Officer and
        President of Tyco for the past five years, will serve as Chairman,
        Chief Executive Officer and President of the Combined Company.
        Mark H. Swartz, Tyco's Vice President and Chief Financial Officer
        for the past two years, will be Vice President and Chief Financial
        Officer of the Combined Company.  Stephen J. Ruzika, Executive
        Vice President and Chief Financial Officer of ADT, is expected to
        continue to lead the Combined Company's electronic security
        services business and its new product development program.

     o  Diversification.  Both Tyco and ADT are also engaged in other
        businesses.  Tyco is a manufacturer and distributor of disposable
        medical products, packaging materials, flow control products and
        electrical and electronic components, with strong leadership positions
        in each of the markets in which it participates.  ADT is the second
        largest provider of vehicle auction and redistribution services in the
        United States.  The Merger will give shareholders of both Tyco and ADT
        an interest in a larger and more diverse enterprise.

    
Recommendation of the Tyco Board
   

        At a meeting of the Tyco Board held on March 16, 1997, after
careful consideration, the Tyco Board unanimously (i) determined that the
Merger Agreement (subject to negotiation of final legal terms satisfactory to
Tyco's Chairman and its Chief Financial Officer) and the Merger were fair to
and in the best interests of Tyco shareholders, (ii) approved the Merger
Agreement and the transactions that it contemplates (subject to the
negotiation of final terms) and (iii) recommended that the shareholders of
Tyco approve the Merger Agreement and the Merger.

        Information and Factors Considered by the Tyco Board.  In
reaching its conclusion, the Tyco Board considered the following material
information and factors:
    

      (i) all the reasons described above under "Tyco's and ADT's Reasons for
the Merger";

   
     (ii) the terms and structure of the transaction and the terms and
conditions of the Merger Agreement, including the ratio of one Combined
Company Common Share (after the Reverse Stock Split) to be received by Tyco
shareholders for each Tyco Common Share (the "Exchange Ratio");

    
    (iii) information concerning the business, assets, capital structure,
financial performance and condition and prospects of Tyco and ADT;
   

     (iv) current and historical market prices and trading information with
respect to each company's common shares;

      (v) the strategic fit between Tyco and ADT, and in particular the
opportunity for the Merger presents for Tyco to continue the expansion of
ADT's already substantial service business, which has higher profit margins
and is less susceptible to cyclical variation than Tyco's fire protection
contracting business;
    

     (vi) Tyco's history of growth through acquisitions, including its
substantial experience in integrating acquired businesses with existing
operations and thereby achieving synergies and cost savings;

   
    (vii) the fact that ADT, a company domiciled in Bermuda, will be the
continuing parent corporation in the Merger, which will allow the Combined
Company to preserve certain tax advantages currently enjoyed by ADT and is
expected to provide the Combined Company with opportunities for tax
savings;

   (viii) the negative factor that Tyco shareholders will recognize gain
(but not loss) for U.S. federal income tax purposes on the exchange of Tyco
Common Shares for Combined Company Common Shares;

     (ix) the risks that the Combined Company will not achieve expected
synergies and cost savings (as discussed under "Risk Factors" and
"Cautionary Statement Concerning Forward-Looking Statements");

      (x) the expectation that the earnings per share of the Combined Company
(before restructuring and similar charges) would not be dilutive to Tyco
shareholders in comparison with Tyco's earnings per share;

     (xi) the opinion dated March 16, 1997 of Credit Suisse First Boston to
the Tyco Board, that based upon and subject to the factors and assumptions
set forth therein, as of such date, the Exchange Ratio was fair from a
financial point of view to the shareholders of Tyco.  (see "Role of
Financial Advisors--Opinion of Tyco's Financial Advisor");

    (xii) the anticipated treatment of the Merger as a pooling of interests
for financial accounting purposes;
    

   (xiii) the prospects that the necessary regulatory approvals for the Merger
would be obtained on terms acceptable to Tyco; and

    (xiv) the effect of the Merger on the customers and employees of the two
companies.

   
     The foregoing discussion of the information and factors
considered and given weight by the Tyco Board is not intended to be
exhaustive.  In view of the wide variety of factors considered in connection
with its evaluation of the Merger, the Tyco Board did not find it practicable
to and did not attempt to rank or assign relative weights to these factors.
In addition, individual members of the Tyco Board may have given different
weights to different factors.
    

     Recommendation of the Tyco Board.  The Tyco Board unanimously
recommends that the Tyco shareholders vote "FOR" the approval of the Merger
and the Merger Agreement.

Recommendation of the ADT Board

   
     At a meeting of the ADT Board held on March 16, 1997, after
careful consideration, the ADT Board unanimously (i) voted that the Merger
Agreement, the Merger and the other transactions contemplated by the Merger
Agreement were fair to and in the best interests of ADT shareholders, (ii)
approved the Merger Agreement and the transactions that it contemplates and
(iii) recommended that the shareholders of ADT approve the ADT Merger
Proposals.

     Information and Factors Considered by the ADT Board.  In
reaching its conclusion, the ADT Board considered the following material
information and factors:

      (i) all the reasons described above under "Tyco's and ADT's Reasons for
the Merger";

     (ii) the terms and structure of the transaction and the terms and
conditions of the Merger Agreement, including the Exchange Ratio and the
Reverse Stock Split Ratio;

    (iii) information concerning the business, assets, capital structure,
financial performance and condition and prospects of ADT and Tyco;

     (iv) current and historical market prices and trading information with
respect to each company's common shares;

      (v) the strategic fit between ADT and Tyco, the opportunity for
significant synergies and cost savings and the possibility that ADT on its own
might not be able to achieve the level of synergies, cost savings and
operating efficiencies that may be available as a result of the Merger;

     (vi) the risk that the combined company will not achieve the expected
synergies and cost savings or improvement in earnings (as discussed under
"Risk Factors" and "Cautionary Statement Concerning Forward-Looking
Statements");

    (vii) the oral opinion of Merrill Lynch addressed to the ADT Board,
subsequently confirmed in writing as of March 17, 1997 and as of the date
hereof, that, as of such dates, the Exchange Ratio was fair to the
shareholders of ADT from a financial point of view (a copy of the written
opinion of Merrill Lynch dated the date hereof, setting forth the
assumptions, limitations and qualifications of such opinion, is attached
hereto in its entirety as Annex III)  (see "Role of Financial Advisors--
Opinion of ADT's Financial Advisor");
    

   (viii) the fact that the Merger and the Reverse Stock Split will be
tax-free to U.S. ADT Shareholders for federal income tax purposes, except to
the extent that ADT shareholders receive cash in lieu of fractional shares;

   
     (ix) the fact that ADT will be the continuing parent corporation in the
Merger, which will allow the Combined Company to preserve certain tax
advantages currently enjoyed by ADT and is expected to provide the Combined
Company with opportunities for tax savings;
    

      (x) the anticipated treatment of the Merger as a pooling of interests
for financial accounting purposes;

     (xi) the likelihood of obtaining required regulatory approvals; and

    (xii) the impact of the Merger on the customers and employees of each
company.

     The foregoing discussion of the information and factors
considered and given weight by the ADT Board is not intended to be exhaustive.
In view of the wide variety of factors considered in connection with its
evaluation of the Merger, the ADT Board did not find it practicable to and did
not attempt to rank or assign relative weights to these factors. In addition,
individual members of the ADT Board may have given different weights to
different factors.

     Recommendation of the ADT Board.  The ADT Board unanimously
recommends that the shareholders of ADT vote "FOR" the ADT Merger Proposals.

Certain Other Matters Relating to the Combined Company

   
     ADT Indebtedness.  ADT has outstanding $250.0 million of 8.25%
Senior Notes due August 2000 (the "Senior Notes") and $294.1 million of 9.25%
Senior Subordinated Notes due August 2003 (the "Senior Subordinated Notes,"
and together with the Senior Notes, the "Notes").  Consummation of the Merger
would constitute an event of default under the indentures governing the Senior
Notes and the Senior Subordinated Notes unless the indentures are amended or
the covenants under the indentures are defeased.  "Defeasance" is a procedure
whereby ADT deposits certain monies and follows certain procedures and thereby
terminates its obligations under the covenants contained in the indentures.
The indentures also contain restrictions on the ability of the Combined
Company to conduct its business in a manner consistent with the past practices
of Tyco, including limitations on investments and acquisitions, incurrence of
indebtedness, declaration of dividends and sales of assets.  Tyco and ADT
currently intend that ADT may solicit consents of a majority of the holders of
the Senior Notes and the Senior Subordinated Notes to remove from the
indentures the covenants that would be violated by the Merger and the
covenants restricting the activities of the Combined Company.  Alternatively,
the Notes may be defeased by ADT, in accordance with the indentures, in a
manner that would make the restrictive covenants inoperative.  The consents
would become effective or the obligations under the covenants would be
defeased effective upon consummation of the Merger.  However, there is no
assurance that such consents will be obtained or that the Notes will be
defeased.
    

     If consummation of the Merger were to constitute an event of
default under the Notes, holders of 25% or more of the Senior Notes could
declare the Senior Notes immediately due and payable, and holders of 25% or
more of the Senior Subordinated Notes could declare the Senior Subordinated
Notes immediately due and payable.  If the Notes were accelerated following
consummation of the Merger, Tyco and ADT believe that the acceleration would
not materially adversely affect the Combined Company and that the Combined
Company would have the financial resources to retire all Notes presented for
payment.

     ADT guarantees indebtedness under a credit agreement of its ADT
Operations subsidiary pursuant to a Guaranty dated as of January 9, 1997.  The
consummation of the Merger would result in a breach by ADT of covenants under
the Guaranty restricting the ability of ADT to operate certain businesses and
make certain investments unless ADT obtains an effective waiver of such
covenants.  ADT currently intends to obtain consents from the lenders to the
credit agreement to permit the consummation of the Merger.

   
     Western Resources Proxy Solicitation.  In response to Western's
requisition, the ADT Board has convened the Western Proposals Meeting for July
8, 1997 to consider Western's proposals to remove the current members of the
ADT Board, to reduce the number of directors to two and to elect two officers
of Western as the ADT directors.  Western is soliciting proxies in favor of
these proposals.  See "Background of the Merger--The Western Offer and Certain
Other Events" above.  The ADT Meeting is expected to be held prior to the
Western Proposals Meeting.  However, the Western Proposals Meeting could be
held prior to the ADT Meeting if the ADT Meeting is delayed beyond July 8,
1997 or if a court orders ADT to hold the Western Proposals Meeting prior to
the time of the ADT Meeting.  In either case, the board of the Combined Company
(the "Combined Company Board") or the ADT Board, as the case may be, intends
to solicit proxies in opposition to the Western Proposals.  If the ADT Bye-Law
Amendment Proposal is approved, the Western Proposals Meeting may be
adjourned.  See "Other ADT Meeting Proposals--The ADT Bye-Law Amendment
Proposal."

     Rights Agreement.  The Merger Agreement provides that, at the
election of Tyco communicated to ADT not less than fifteen business days prior
to the ADT Meeting, either ADT will amend the ADT Shareholders Rights Plan to
provide affirmatively that the Merger will not cause the Rights under the ADT
Shareholders Rights Plan to be distributed or become exercisable, or ADT will
redeem all outstanding Rights as of the Effective Time.  It is Tyco's current
intention to require ADT to amend the ADT Shareholders Rights Plan, although
Tyco reserves its contractual right to require redemption of the Rights.

     Other Plans for the Combined Company.  Following consummation
of the Merger, management is expected to conduct a detailed review of the
corporate structure and operations of the Combined Company.  Tyco and ADT
anticipate that this review will result in certain operating consolidations
and elimination of duplicate corporate functions in order to realize cost
savings.  Management may also consider other corporate restructurings for the
purpose of rationalizing the international operations of the Combined Company,
facilitating borrowings and achieving tax and other benefits.
    

Cautionary Statement Concerning Forward-Looking Statements

   
     This document contains forward-looking statements that are
subject to risks and uncertainties.  Such forward-looking statements recite
expectations for the businesses of Tyco and ADT and the markets for their
products and services.  These include, for example, projections of future
performance and results of operations, statements of management's plans and
objectives, forecasts of market trends, and synergies and cost savings of the
Combined Company after the Effective Time.  Such statements may be found in
this Joint Proxy Statement/Prospectus under "Questions and Answers About the
Merger," "Summary," "Risk Factors," "--Background of the Merger," "--Tyco's
and ADT's Reasons for the Merger," "--Recommendation of the Tyco Board,"
"--Recommendation of the ADT Board" and "Role of Financial Advisors."
Forward-looking statements also include any other statements in this document
that are preceded by, followed by or that otherwise include the words
"believes," "expects," "anticipates," "intends," "estimates"  or similar
expressions.  For all such statements, Tyco and ADT claim the protection of
the safe harbor for forward-looking statements contained in the Private
Securities Litigation Reform Act of 1995.  All forward-looking statements are
subject to known and unknown risks, uncertainties and contingencies, many of
which are beyond the control of Tyco and ADT, which may cause actual results,
performance or achievements to differ materially from anticipated results,
performance or achievements.  Factors that might affect forward-looking
statements include overall economic and business conditions, the demand for
products and services of the Combined Company, competitive factors in the
industries in which Tyco and ADT operate, changes in the laws affecting the
Combined Company, regulatory approvals and uncertainty about the consummation
of future acquisitions.
    

Accounting Treatment

     It is a condition to the consummation of the Merger that Tyco
and ADT each receive from Coopers & Lybrand  L.L.P. and Coopers & Lybrand,
respectively, independent accountants, a letter dated as of the Effective Time
to the effect that they concur with the conclusions of Tyco's and ADT's
management that the transaction contemplated by the Merger Agreement, if
consummated, will qualify as a transaction to be accounted for in accordance
with the pooling of interests method of accounting pursuant to Opinion No. 16,
Business Combinations, of the Accounting Principles Board of the American
Institute of Certified Public Accountants ("APB Opinion No. 16").

     Under the pooling of interests method of accounting, the assets
and liabilities of Tyco will be carried forward to ADT at their historical
cost recorded bases.  Results of operations of the Combined Company will
include the results of both Tyco and ADT for the entire fiscal year in which
the Merger occurs.  The reported balance sheet amounts and results of
operations of the separate companies for prior periods will be combined,
reclassified and conformed, as appropriate, to reflect the combined financial
position and results of operations for the Combined Company.  See "Unaudited
Pro Forma Combined Condensed Financial Information."

   
Certain United States Federal Income, United Kingdom and Bermuda Tax
Consequences

United States

     As used in this section, a "United States Holder" of Tyco
Common Shares, ADT Common Shares or Combined Company Common Shares means a
holder that is, for United States federal income tax purposes, a citizen or
resident of the United States, a corporation or partnership created or
organized in or under the laws of the United States, or any political
subdivision thereof, or an estate or trust the income of which is subject to
United States federal income taxation regardless of its source.

     The Merger.  In general, for U.S. federal income tax purposes,
upon the exchange of Combined Company Common Shares for Tyco Common Shares
pursuant to the Merger, each Tyco shareholder that is a United States Holder
will recognize gain in an amount equal to the excess, if any, of (x) the fair
market value of the Combined Company Common Shares received over (y) the Tyco
shareholder's adjusted tax basis in the Tyco Common Shares exchanged therefor.
Such gain will be capital gain if the Tyco shareholder holds the Tyco Common
Shares as a capital asset, and will be long-term gain if the Tyco
shareholder's holding period for the Tyco Common Shares is more than one year.
The gain may also be subject to tax under applicable state, local and foreign
tax laws.  A Tyco shareholder that realizes a loss upon the exchange will not
recognize such loss for U.S. federal income tax purposes.

     A Tyco shareholder that recognizes gain for U.S. federal income
tax purposes upon the exchange will have a tax basis in the Combined Company
Common Shares received equal to their fair market value, and such
shareholder's holding period for the Combined Company Common Shares will begin
on the day following the date of the exchange.  A Tyco shareholder that
realizes but is unable to recognize a loss for U.S. federal income tax
purposes will have a tax basis in the Combined Company Common Shares received
equal to the shareholder's basis in the Tyco Common Shares exchanged therefor,
and the shareholder's holding period for the Combined Company Common Shares
will include the holding period of the Tyco Common Shares exchanged therefor.

     The Reverse Stock Split.  ADT shareholders that are United
States Holders will not be subject to U.S. federal income taxation upon the
exchange of Combined Company Common Shares for ADT Common Shares pursuant to
the Reverse Stock Split, except to the extent that cash is received in lieu of
fractional shares (discussed below).  The tax basis of the Combined Company
Common Shares which will be held by the ADT shareholders as a result of the
Reverse Stock Split will be the same as the tax basis of the ADT Common Shares
held prior to the Reverse Stock Split (minus the amount of this basis
allocated to fractional shares), and the holding period of such Combined
Company Common Shares will include the holding period of the ADT Common Shares
held prior to the Reverse Stock Split.  Each such ADT shareholder receiving
cash in lieu of a fractional share will recognize gain or loss equal to the
difference between (x) the amount of cash received and (y) such ADT
shareholder's adjusted tax basis in the fractional Combined Company Common
Share.  Such gain or loss generally will be capital gain or loss if the ADT
shareholder held the ADT Common Shares as a capital asset, and will be
long-term gain or loss if the ADT shareholder's holding period for the ADT
Common Shares was more than one year.

     Holding Combined Company Common Shares.  Distributions with
respect to Combined Company Common Shares will be includible in the gross
income of a United States Holder of Combined Company Common Shares as foreign
source dividend income to the extent that such distributions are made out of
the Combined Company's current or accumulated earnings and profits as
determined for United States federal income tax purposes.  The amount of any
distribution of property other than cash will be the fair market value of such
property on the date of distribution by the Combined Company.  United States
Holders will not be entitled to claim a dividends received deduction with
respect to distributions by the Combined Company.  United States Holders will
realize capital gain or loss for United States federal income tax purposes on
the sale or other disposition of Combined Company Common Shares in the same
manner as on the sale or other disposition of any other shares held as capital
assets.  Gain, if any, will generally be United States source gain.  Certain
noncorporate United States Holders may be subject to backup withholding at a
rate of 31% on dividends paid on the Combined Company Common Shares or the
proceeds of disposition of Common Shares.  Backup withholding will apply only
if the Holder (i) fails to furnish its Taxpayer Identification Number ("TIN"),
(ii) furnishes an incorrect TIN, (iii) is notified by the IRS that it has
failed to properly report payments of interest and dividends or (iv) under
certain circumstances fails to certify, under penalty of perjury, that it has
furnished a correct TIN and that it has not been notified by the IRS that it
is subject to backup withholding for failure to report interest and dividend
payments.  The amount of any backup withholding from a payment to a United
States Holder will be allowed as a credit against such Holder's United States
federal income tax liability and may entitle such Holder to a refund, provided
that the required information is furnished to the IRS.

United Kingdom

     The Reverse Stock Split.  A holder of existing ADT Common
Shares who, under the Reverse Stock Split, receives Combined Company Common
Shares will not be treated as effecting a disposal or part disposal of his
existing ADT Common Shares for the purposes of United Kingdom tax on capital
gains except to the extent that cash is received in lieu of fractional shares.
The Combined Company Common Shares which will be held by the ADT shareholders
as a result of the Reverse Stock Split will be treated as the same asset,
acquired at the same time and having the same base cost (minus the amount of
the base cost allocated to fractional shares), as the ADT Common Shares held
prior to the Reverse Stock Split.

     Holding Combined Company Common Shares.  Under current United
Kingdom law, United Kingdom resident shareholders will be liable to income tax
or corporation tax on dividends paid by the Combined Company at the rate
applicable to their particular circumstances, although, if such shareholders
are not domiciled in the United Kingdom, any such liability is limited to the
extent that such dividends (if any) are remitted or deemed to be remitted to
the United Kingdom.  If dividends are paid by or through a paying agent or
collecting agent in the United Kingdom, such agent may be required to withhold
or deduct for or on account of United Kingdom income tax at the lower rate
(currently 20 per cent) from the amount of such dividends unless evidence in a
form satisfactory to the Inland Revenue is produced that the person
beneficially entitled to the dividend is the beneficial owner of the Combined
Company Common Shares and is not resident in the United Kingdom for tax
purposes.  The amount of United Kingdom tax withheld will be available as a
credit against the liability of United Kingdom resident shareholders to pay
income tax or corporation tax as appropriate in respect of the relevant
dividend.

Bermuda

     There will be no Bermuda income, corporation or profits tax,
withholding tax, capital gains tax, capital transfer tax, estate duty or
inheritance tax payable in respect of an exchange of Combined Company Common
Shares for Tyco Common Shares pursuant to the Merger or of Combined Company
Common Shares for ADT Common Shares pursuant to the Reverse Stock Split.  In
addition, as of the date hereof, there is no Bermuda income, corporation or
profits tax, withholding tax, capital gains tax, capital transfer tax, estate
duty or inheritance tax payable in respect of capital gains realized on a
disposition of Combined Company Common Shares or in respect of distributions
by the Combined Company with respect to Common Shares.  Furthermore, ADT has
received from the Minister of Finance of Bermuda under the Exempted
Undertakings Tax Protection act of 1966, as amended, an undertaking that, in
the event of there being enacted in Bermuda any Legislation imposing any tax
computed on profits or income, including any dividend or capital gains
withholding tax, or computed on any capital assets, gain or appreciation, or
any tax in the nature of an estate or inheritance tax or duty, the imposition
of such tax shall not be applicable to ADT or any of its operations, nor to
its Common Shares, nor to obligations of ADT until the year 2016.  This
undertaking applies to Combined Company Common Shares.  It does not, however,
prevent the application of Bermuda taxes to persons ordinarily resident in
Bermuda.

     The foregoing discussion describes for shareholders only the
material U.S. federal income and Bermuda tax consequences of the Merger and
the material U.S. federal income, U.K. and Bermuda tax consequences of the
Reverse Stock Split and of holding Combined Company Common Shares, and does
not purport to be a complete analysis or description of all potential tax
effects of these transactions.  In addition, the discussion does not address
all of the tax consequences that may be relevant to particular taxpayers in
light of their personal circumstances or to taxpayers subject to special
treatment under the U.S. Internal Revenue Code (the "Code") (for example, Tyco
and ADT shareholders who acquired their shares pursuant to the exercise of
options or similar derivative securities or otherwise as compensation,
insurance companies, financial institutions, dealers in securities, tax-exempt
organizations, foreign corporations, foreign partnerships or other foreign
entities and individuals who are not citizens or residents of the United
States), or to certain classes of U.K. resident shareholders such as dealers.

     Other than the U.K. and Bermuda tax considerations described
above, no information is provided herein with respect to any tax consequences
of the Merger and the Reverse Stock Split  for shareholders under applicable
foreign, state, local and other tax laws.  The foregoing discussion is based
upon the provisions of the Code, applicable U.S. Treasury regulations
thereunder, U.S. Internal Revenue Service rulings, administrative
pronouncements and judicial decisions and U.K. law and practice, all as in
effect on the date of this Joint Proxy Statement/Prospectus.  There can be no
assurance that future legislative, administrative or judicial changes or
interpretations will not affect the accuracy of the statements or conclusions
set forth herein.  Any such change could apply retroactively and could affect
the accuracy of this discussion.  No rulings have or will be sought from the
U.S. Internal Revenue Service or the U.K. Inland Revenue concerning the tax
consequences of the Merger and the Reverse Stock Split.
    

     Each shareholder of Tyco and ADT is urged to consult such
shareholder's own tax advisor as to the specific tax consequences of the
Merger and the Reverse Stock Split for such shareholder under federal, state,
local or any other applicable tax laws.

Regulatory Matters

   
     Under the HSR Act, and the rules promulgated thereunder by the
Federal Trade Commission (the "FTC"), the Merger may not be consummated until
notifications have been given and certain information has been furnished to
the FTC and the Antitrust Division of the United States Department of Justice
(the "Antitrust Division") and specified waiting period requirements have been
satisfied.  Tyco and ADT filed the required notification and report forms
under the HSR Act with the FTC and the Antitrust Division on April 3, 1997 and
the applicable waiting period expired on May 3, 1997.  The FTC and the
Antitrust Division have the authority to challenge the Merger on antitrust
grounds before or after the Merger is completed. Each state in which Tyco or
ADT has operations may also review the Merger under state antitrust law.

     The Merger is subject to notification to and the approval of
the Commission of the European Communities (the "EC Commission") under Council
Regulation 4064/89/EEC on the control of concentrations.  Notification to the
EC Commission was made on April 25, 1997, and the EC Commission has until June
3, 1997 either to approve the Merger or, if it has serious doubts as to the
compatibility of the Merger with the common market, to open an in-depth
investigation which can last a maximum of four months.

     Tyco and ADT have agreed to use their best efforts to take
whatever actions  are required to obtain these approvals.  (For additional
information on this commitment, see "The Merger Agreement--Certain
Covenants.")  Tyco and ADT cannot predict whether they will obtain the
required regulatory approvals within the time frame contemplated by the Merger
Agreement or on terms that they find satisfactory.
    

Appraisal Rights

   
     General.  Under the provisions of the Merger Agreement and
Massachusetts law, shareholders of Tyco are entitled to exercise appraisal
rights with respect to the Merger.  However, holders of ADT Common Shares will
have no dissenters' appraisal rights under Bermuda law because the Merger is
to be achieved through the merger of a Massachusetts subsidiary of ADT with
Tyco under Massachusetts law.  Massachusetts law does not expressly provide
for a merger between a Massachusetts corporation and a non-U.S. company.
Appraisal rights entitle holders of Tyco Common Shares to receive the
appraised value of their shares instead of having their shares converted into
Combined Company Common Shares.  A copy of the applicable Massachusetts
statutes that prescribe the procedures for exercising appraisal rights is
attached as Annex IV to this Joint Proxy Statement/Prospectus.  Shareholders
of Tyco who seek to exercise such rights must carefully follow the procedures
prescribed by Massachusetts law.  The following discussion is a summary of the
requirements of Massachusetts law with respect to appraisal rights and is
qualified in its entirety by reference to Massachusetts law and the
Massachusetts statutes attached as Annex IV to this Joint Proxy
Statement/Prospectus.

     Procedural Requirements.  Any holder of Tyco Common Shares,
including any beneficial holder, who desires to exercise appraisal rights must
(i) file with Tyco, before the vote of shareholders on the Merger, written
objection to the Merger stating that he or she intends to demand payment for
his or her shares if the Merger is effected and (ii) not vote his or her
shares in favor of the Merger.  The written objection to the Merger should be
sent to Tyco International Ltd., One Tyco Park, Exeter, New Hampshire 03833,
Attention:  Clerk.  A dissenting shareholder need not vote against the Merger,
so long as his or her shares are not voted in favor of the Merger.  However,
neither a vote against the Merger nor the failure to vote for the Merger is a
substitute for the written objection required to be filed by a dissenting
shareholder.  A Tyco shareholder who returns a signed proxy card that does not
contain instructions for a vote against the Merger will be deemed to have
voted in favor of the Merger and, therefore, to have waived all appraisal
rights.
    

     The Surviving Corporation is required within ten days after the
effective date of the Merger to notify each shareholder who has filed a
written objection and whose shares were not voted in favor of the Merger that
the Merger has become effective.  If within twenty days after the date of
mailing of such a notice a dissenting shareholder demands in writing from the
Surviving Corporation payment for his or her stock, the Surviving Corporation
is required to pay to him or her the fair value of his or her Tyco Common
Shares within thirty days after the expiration of the period during which such
demand may be made.  The written demand for payment should be sent to the
Surviving Corporation at Tyco's address set forth in the prior paragraph.   If
during that period of thirty days the Surviving Corporation and the dissenting
shareholder fail to agree on the value of their shares, the Surviving
Corporation or the shareholder may, within four months after the expiration of
the thirty-day period, demand a determination of the value of the stock of all
dissenting former shareholders of the Surviving Corporation by a bill in
equity filed in the superior court in Suffolk County, Commonwealth of
Massachusetts.  If no bill is filed within this four month period, none of the
dissenting Tyco shareholders who have failed to agree with the Surviving
Corporation on the value of their shares will be entitled to appraisal rights.

     After a hearing, the court will enter a decree determining the
fair value, as of the day before the Tyco Meeting, of the Tyco Common Shares
of those shareholders who have become entitled to the valuation of and payment
for their Tyco Common Shares.  Massachusetts law provides that the fair value
of the shares will be determined exclusive of any element of value arising
from the accomplishment of or expectation of the Merger.  The court will also
order the Surviving Corporation to make payment of this value with interest to
the shareholders upon the transfer by them to the Surviving Corporation of the
certificates representing their Tyco Common Shares.  The costs of the bill in
equity, exclusive of costs of giving notice to shareholders and fees of
counsel or experts retained by any party, will be assessed among the parties
as determined by the court.

   
     Tyco shareholders who have demanded payment of the value of
their shares will not be entitled to any rights of shareholders of the
Combined Company, except in the circumstances described below.  Thus, such
shareholders will not be entitled to receive notice of any shareholder meeting
of the Combined Company, to vote as a shareholder of the Combined Company for
any purpose, or to receive any dividends or other distributions as a
shareholder of the Combined Company, unless either such shareholders lose
appraisal rights because of a failure to comply with Massachusetts law, or
such shareholders, with the approval of the Surviving Corporation, deliver to
the Surviving Corporation within the permitted time period, a written
withdrawal of their dissent and an acceptance of the terms offered in the
Merger.

     By statute, the enforcement by a Tyco shareholder of appraisal
rights pursuant to the procedures set forth above is the shareholder's
exclusive remedy.  However, a shareholder retains the right to challenge any
corporate action on the grounds that it is or will be illegal or fraudulent as
to such shareholder.  Also, in Coggins v. New England Patriots Football Club,
Inc., 397 Mass. 525 (1986), the Massachusetts Supreme Judicial Court held that
dissenting shareholders are not limited to the statutory remedy of judicial
appraisal where violations of fiduciary duty are found.

     Shareholders of Tyco who dissent with respect to the Merger
might receive payments which are more or less than the value of the Combined
Company Common Shares they would have received pursuant to the Merger
Agreement.

     Tax Consequences to Dissenting Shareholders.  Cash received by
a dissenting Tyco shareholder will be treated as having been received as a
distribution in redemption of the shareholder's Tyco Common Shares.  Such
shareholder generally will recognize gain or loss equal to the difference
between (x) the amount of cash received and (y) the shareholder's adjusted
basis in the relevant Tyco Common Shares.  Such gain or loss will be capital
gain or loss if the Tyco shareholder held the Tyco Common Shares as a capital
asset, and will be long-term gain or loss if the Tyco shareholder's holding
period for the Tyco Common Shares was more than one year.  A Tyco shareholder
that exercises appraisal rights is urged to consult that shareholder's own tax
advisor as to the specific tax consequences for that shareholder under
federal, state, local or any other applicable tax laws.
    

     Possible Effects on Accounting Treatment.  It is a condition to
the obligations of Tyco and ADT to consummate the Merger that the Merger
qualify for pooling-of-interests accounting treatment.  See "--Accounting
Treatment."  The exercise of appraisal rights by holders of a sufficiently
large number of Tyco Common Shares could prevent such qualification.

U.S. Federal Securities Laws Consequences; Stock Transfer Restriction
Agreements

     This Joint Proxy Statement/Prospectus does not cover any
resales of Combined Company Common Shares to be received by the shareholders
of Tyco upon consummation of the Merger or to be held by ADT shareholders as a
result of the Reverse Stock Split, and no person is authorized to make any use
of this Joint Proxy Statement/Prospectus in connection with any such resale.

   
     All Combined Company Common Shares received by Tyco
shareholders in the Merger or held by ADT shareholders as a result of the
Reverse Stock Split will be freely transferable, except that Combined Company
Common Shares received by persons who are deemed to be "affiliates" of Tyco
under the U.S. Securities Act of 1933, as amended (the "1933 Act"), at the
time of the Tyco Meeting may be resold by them only in transactions permitted
by Rule 145 of the 1933 Act ("Rule 145") or as otherwise permitted under the
1933 Act.  See also "Description of Combined Company Capital
Stock--Transfers."  Persons who may be deemed to be affiliates of Tyco for
such purposes generally include individuals or entities that control, are
controlled by or are under common control with Tyco and may include certain
officers and directors of Tyco.  The Merger Agreement requires Tyco to use its
best efforts to cause these affiliates to agree in writing that they will
comply with the restrictions under Rule 145.  The Merger Agreement also
provides that each of Tyco and ADT will use its best efforts to cause its
respective affiliates to agree in writing that they will not sell Tyco Common
Shares, ADT Common Shares or Combined Company Common Shares at a time that
would prevent the Merger from qualifying as a pooling of interests for
financial accounting purposes.


                           CURRENT DEVELOPMENTS

     On April 11, 1997, Tyco entered into an agreement with AT&T to
acquire its submarine systems business ("SSI") for approximately $850 million
in cash.  SSI is a world leader in the design, development, manufacture,
installation, supply and maintenance of undersea fiber optic telecommunication
cable systems, with expected calendar 1997 revenues of approximately $1
billion.  With the combination and integration of SSI and Tyco's Simplex
Technologies unit, Tyco believes it will have a competitive advantage in the
global marketplace for undersea telecommunications cable systems, by making it
the only fully integrated single source for cable system design,
manufacturing, installation and maintenance.  The acquisition will be
accounted for as a purchase and is expected to be consummated in June 1997.
Tyco is in the process of establishing a commercial paper program and
increasing bank credit facilities which will be used to fund the purchase of
SSI.  The acquisition of SSI is not expected to have an impact on, or be
affected by, the Merger.

     Tyco reviews acquisition opportunities in the ordinary course
of its business, some of which may be material and some of which are currently
under investigation, discussion or negotiation.
    



        COMPARATIVE PER SHARE MARKET PRICE AND DIVIDEND INFORMATION

     Tyco Common Shares and ADT Common Shares are listed on the
NYSE.  The Tyco ticker symbol on the NYSE is TYC.  The ADT ticker symbol on
the NYSE is ADT.  ADT Common Shares are also listed on the London Stock
Exchange and the Bermuda Stock Exchange.

     The tables below set forth, for the calendar quarters
indicated, the reported intra-day high and low sale prices of Tyco Common
Shares and ADT Common Shares as reported on the NYSE Composite Transaction
Tape, in each case based on published financial sources, and the dividends
declared on such shares.  The prices and dividends for Tyco have been restated
to reflect a two-for-one stock split effected in the form of a stock dividend
which was distributed on November 14, 1995.

<TABLE>
<CAPTION>
                                     ADT Common Shares                                      Tyco Common Shares
                                Market Price                 Cash                      Market Price                   Cash
                                                           Dividends                                                 Dividends
                              High         Low             Declared                  High            Low             Declared
1995
<S>                          <C>           <C>              <C>               <C>                   <C>               <C>
First Quarter...........  $   12 1/4    $    9 5/8         $      -        $         26 13/16    $    23 1/4       $    0.05
Second Quarter..........      12 1/4        10 1/8                -                  29 1/8           25 1/2            0.05
Third Quarter...........      14 1/8        11 5/8                -                  31 5/8           26 1/16           0.05
Fourth Quarter..........      15 1/4        13                    -                  35 5/8           29 1/2            0.05
1996
First Quarter...........  $   18        $   14             $      -        $         39 1/4      $    32 3/8       $    0.05
Second Quarter..........      19 1/2        16 1/4                -                  41 3/8           35 1/8            0.05
Third Quarter...........      24 3/4        15 7/8                -                  44 7/8           35 1/2            0.05
Fourth Quarter..........      23 1/4        18 1/2                -                  56               42 7/8            0.05
1997
First Quarter...........  $   27 5/8    $   21 1/4         $      -        $         62          $    51 3/4       $    0.05
Second Quarter (through
May 8, 1997)...........       28 7/8        24 1/2                -                  63 7/8           54
</TABLE>


   
     On March 14, 1997, the last full trading day prior to the
public announcement of the proposed Merger, the closing price on the NYSE
Composite Transaction Tape was $60 1/4 per Tyco Common Share and  $21 3/4 per
ADT Common Share.  On May __, 1997, the most recent practicable date prior to
the printing of this Joint Proxy Statement/Prospectus, the closing price on
the NYSE Composite Transaction Tape was $___ per Tyco Common Share and  $___
per ADT Common Share.  Shareholders are urged to obtain current market
quotations prior to making any decision with respect to the Merger.
    

     Tyco currently pays quarterly dividends of $0.05 per Tyco
Common Share.  ADT currently pays no dividends.  The Combined Company expects
to continue Tyco's dividend practice according to which it would pay quarterly
dividends of $0.05 per Combined Company Common Share, although this may be
changed at any time by the Combined Company Board.  The payment of dividends
by the Combined Company in the future will depend on business conditions, the
Combined Company's financial condition and earnings and other factors.



         UNAUDITED PRO FORMA COMBINED CONDENSED FINANCIAL INFORMATION

   
               The Merger is to be accounted for in accordance with the
pooling of interests method of accounting pursuant to APB Opinion No. 16.  The
pooling of interests method of accounting assumes that Tyco and ADT have been
merged since their inception, and the historical consolidated financial
statements for periods prior to consummation of the Merger are restated as
though the companies have been combined since their inception.  Accordingly,
the accompanying unaudited pro forma combined financial information gives
effect to the transaction in accordance with pooling of interests.  Pursuant
to Rule 11-02 of Regulation S-X, the unaudited pro forma combined financial
information excludes the results of discontinued operations and extraordinary
items.

               The unaudited pro forma combined financial information should
be read in conjunction with (i) ADT's consolidated financial statements,
including the accounting policies and notes thereto, included in its annual
report on Form 10-K for the year ended December 31, 1996, (ii) Tyco's
consolidated financial statements, including the accounting policies and notes
thereto, included in its annual report on Form 10-K for the year ended June
30, 1996, and (iii) Tyco's consolidated financial statements and notes thereto
included in its quarterly reports on Form 10-Q for the quarterly periods ended
September 30, 1996 and December 31, 1996.  See "Where You Can Find More
Information."

               The unaudited pro forma combined financial information has been
prepared in United States dollars in accordance with generally accepted
accounting principles in the United States ("U.S. GAAP").  These principles
require management  to make extensive use of estimates and assumptions that
affect the reported amounts of assets and liabilities and disclosure of
contingent assets and liabilities at the date of the consolidated financial
statements and the reported amounts of revenues and expenses during the
reporting period.  Actual results could differ from those estimates.  The
unaudited pro forma combined results of operations are not necessarily
indicative of future operating results.

               Tyco's fiscal year-end is currently June 30, while ADT's is
December 31.  For purposes of the unaudited pro forma combined results of
operations, Tyco's results have been adjusted to a calendar year basis to
conform to that of ADT.  Certain figures for the years ended December 31, 1995
and 1994 have been reclassified to conform to the 1996 presentation.  In
addition, certain figures of Tyco and ADT at March 31, 1997, for the three
months ended March 31, 1997 and 1996 and for the years ended December 31,
1996, 1995 and 1994 have been reclassified to conform to the combined
presentation.

               The unaudited pro forma combined condensed balance sheet gives
effect to the Merger as if it had occurred on March 31, 1997, combining the
balance sheets of Tyco and ADT at March 31, 1997.  The unaudited pro forma
combined statements of income give effect to the Merger as if it had occurred
on January 1, 1994, combining the results of Tyco and ADT for each of the
three years in the period ended December 31, 1996 and for each of the three
month periods ended March 31, 1997 and 1996.


             UNAUDITED PRO FORMA COMBINED STATEMENTS OF INCOME
                 FOR THE THREE MONTHS ENDED MARCH 31, 1997
         (in millions, except share number and per share amounts)




<TABLE>
<CAPTION>
                                                                                               Pro Forma       Pro Forma
                                                                  ADT            Tyco         Adjustments       Combined
                                                               ---------     -----------     ------------     -----------

<S>                                                            <C>           <C>             <C>              <C>
Net sales..................................................    $   460.7     $   1,654.2     $                $   2,114.9
Cost of sales..............................................       (239.3)       (1,194.5)                        (1,433.8)
Selling, general and administrative expenses...............       (155.5)         (264.8)                          (420.3)
                                                               ---------     -----------     ------------     -----------
Operating (loss) income....................................         65.9           194.9                            260.8
Interest income (2)........................................          4.7              --              0.9             5.6
Interest expense (2).......................................        (21.4)          (20.1)            (0.9)          (42.4)
                                                               ---------     -----------     ------------     -----------
(Loss) income from continuing operations before income
 taxes.....................................................         49.2           174.8                            224.0
Income taxes...............................................        (14.2)          (68.1)                           (82.3)
                                                               ---------     -----------     ------------     -----------
(Loss) income from continuing operations...................    $    35.0     $     106.7     $                $     141.7
                                                               =========     ===========     ============     ===========
Primary earnings per common share
(Loss) income from continuing operations...................    $    0.23     $      0.67     $       --       $      0.61
                                                               =========     ===========     ============     ===========
Fully diluted earnings per common share
(Loss) income from continuing operations...................    $    0.22     $       0.67    $       --       $      0.60
                                                               =========     ===========     ============     ===========
Weighted average number of common shares (in thousands)
Primary....................................................      149,093         159,841                          231,604
                                                               =========     ===========     ============     ===========
Fully diluted..............................................      173,714         160,003                          243,617
                                                               =========     ===========     ============     ===========
</TABLE>


             UNAUDITED PRO FORMA COMBINED STATEMENTS OF INCOME
                 FOR THE THREE MONTHS ENDED MARCH 31, 1996
         (in millions, except share number and per share amounts)




<TABLE>
<CAPTION>
                                                                                                Pro Forma        Pro Forma
                                                                   ADT            Tyco          Adjustments       Combined
                                                               ---------     -----------       ------------     -----------
<S>                                                           <C>            <C>               <C>              <C>
Net sales.................................................    $    411.3     $   1,257.6       $                $   1,668.9
Cost of sales.............................................        (221.5)         (910.1)                          (1,131.6)
Selling, general and administrative expenses..............        (131.9)         (195.3)                            (327.2)
Charge for the impairment of long-lived assets............        (744.7)           --                               (744.7)
                                                               ---------     -----------       ------------     -----------
Operating (loss) income...................................        (686.8)          152.2                             (534.6)
Interest income (2).......................................           6.5            --                  0.3             6.8
Interest expense (2)......................................         (27.4)          (16.3)              (0.3)          (44.0)
Other expenses less income................................          (0.3)           --                                 (0.3)
                                                               ---------     -----------       ------------     -----------
(Loss) income from continuing operations before income
 taxes....................................................        (708.0)          135.9                             (572.1)
Income taxes..............................................           2.4           (56.4)                             (54.0)
                                                              ----------     -----------       ------------     -----------
(Loss) income from continuing operations..................    $   (705.6)    $      79.5                        $    (626.1)
                                                               =========     ===========       ============     ===========
Primary earnings per common share
(Loss) income from continuing operations..................    $    (5.20)    $      0.52       $        --      $     (2.87)
                                                               =========     ===========       ============     ===========
Weighted average number of common shares (in
thousands)................................................       135,841         152,791                            218,175
                                                               =========     ===========                        ===========
</TABLE>

See accompanying notes to unaudited pro forma combined condensed financial
information.

               UNAUDITED PRO FORMA COMBINED STATEMENTS OF INCOME
                     FOR THE YEAR ENDED DECEMBER 31, 1996
           (in millions, except share number and per share amounts)





<TABLE>
<CAPTION>
                                                                                          Pro Forma          Pro Forma
                                                            ADT           Tyco           Adjustments          Combined
                                                        ---------     -----------       ------------        -----------
<S>                                                     <C>            <C>               <C>                <C>

Net sales...........................................     $ 1,704.0      $ 5,721.8         $                   $ 7,425.8
Cost of sales.......................................        (920.0)      (4,132.3)                             (5,052.3)
Selling, general and administrative expenses........        (567.5)        (926.9)                             (1,494.4)
Restructuring and other non-recurring charges.......        (237.3)           -                                  (237.3)
Charge for the impairment of long-lived assets......        (744.7)           -                                  (744.7)
                                                         ---------      ---------         ------------        ---------
Operating (loss) income.............................        (765.5)         662.6                                (102.9)
Interest income(2)..................................          27.5            -                    3.0             30.5
Interest expense(2).................................        (101.0)         (81.3)                (3.0)          (185.3)
Gain (loss) on disposal of businesses...............           1.7            -                                     1.7
Other income less expenses..........................         128.8            -                                   128.8
                                                         ---------      ---------         ------------        ---------
(Loss) income from continuing operations before
 income taxes.......................................        (708.5)         581.3                                (127.2)
Income taxes........................................          21.8         (233.2)                               (211.4)
                                                         ---------      ---------         ------------        ---------
(Loss) income from continuing operations............     $  (686.7)     $   348.1         $                   $  (338.6)
                                                         =========      =========         ============        =========
Primary earnings per common share
(Loss) income from continuing
     operations.................................         $   (5.01)     $    2.25         $         --        $   (1.53)
                                                         =========      =========         ============        =========
Weighted average number of common shares (in
  thousands)....................................          137,114         154,468                               220,465
                                                         =========      =========         ============        =========
</TABLE>

See accompanying notes to unaudited pro forma combined condensed financial
information.

               UNAUDITED PRO FORMA COMBINED STATEMENTS OF INCOME
                     FOR THE YEAR ENDED DECEMBER 31, 1995
           (in millions, except share number and per share amounts)

<TABLE>
<CAPTION>
                                                                                            Pro Forma           Pro Forma
                                                            ADT            Tyco            Adjustments          Combined
                                                         ---------      ---------          -----------          ---------
<S>                                                      <C>            <C>                <C>                      <C>

Net sales...........................................     $ 1,783.8      $ 4,842.8          $                     $ 6,626.6
Cost of sales.......................................        (990.4)      (3,546.3)                                (4,536.7)
Selling, general and administrative expenses........        (558.4)        (772.7)                                (1,331.1)
Restructuring and other non-recurring charges.......         (34.2)             -                                    (34.2)
                                                         ---------      ---------          ----------            ---------
Operating (loss) income.............................         200.8          523.8                                    724.6
Interest income(2)..................................          16.2              -                 1.1                 17.3
Interest expense(2).................................        (116.3)         (62.0)               (1.1)              (179.4)
Gain (loss) on disposal of businesses...............         (36.6)             -                                    (36.6)
Other income less expenses..........................          (5.0)             -                                     (5.0)
                                                         ---------      ---------          ----------            ---------
(Loss) income from continuing operations before
 income taxes.......................................          59.1          461.8                                    520.9
Income taxes........................................         (28.1)        (188.8)                           [2~       (216.9)
                                                         ---------      ---------          ----------            ---------
(Loss) income from continuing operations............     $    31.0      $   273.0          $                     $   304.0
                                                         =========      =========          ==========            =========
Primary earnings per common share
(Loss) income from continuing operations............     $    0.22      $    1.79          $     --              $    1.39
                                                         =========      =========          ==========            =========
Weighted average number of common shares (in
thousands)..........................................       138,283        152,655                                  219,215
                                                         =========      =========          ==========            =========
</TABLE>

See accompanying notes to unaudited pro forma combined condensed financial
information.

               UNAUDITED PRO FORMA COMBINED STATEMENTS OF INCOME
                     FOR THE YEAR ENDED DECEMBER 31, 1994
           (in millions, except share number and per share amounts)




<TABLE>
<CAPTION>
                                                                                            Pro Forma           Pro Forma
                                                            ADT           Tyco             Adjustments           Combined
                                                         ---------      ---------          ----------            ---------
<S>                                                      <C>            <C>                <C>                   <C>

Net sales........................................        $ 1,629.4      $ 4,230.6          $                     $ 5,860.0
Cost of sales....................................           (913.4)      (3,097.0)                                (4,010.4)
Selling, general and administrative expenses.....           (505.5)        (700.5)                                (1,206.0)
Restructuring and other non-recurring charges....             (4.5)         (37.2)                                   (41.7)
                                                         ---------      ---------          ----------            ---------
Operating (loss) income..........................            206.0          395.9                                    601.9
Interest income(2)...............................             15.2              -                 1.3                 16.5
Interest expense(2)..............................            (99.3)         (60.8)               (1.3)              (161.4)
Gain (loss) on disposal of businesses............             (0.3)             -                                     (0.3)
Other income less expenses.......................             (4.1)             -                                     (4.1)
                                                         ---------      ---------          ----------            ---------
(Loss) income from continuing operations before
 income taxes....................................            117.5          335.1                                    452.6

Income taxes.....................................            (34.9)        (151.4)                                  (186.3)
                                                         ---------      ---------          ----------            ---------
(Loss) income from continuing operations.........        $    82.6      $   183.7          $                     $   266.3
                                                         =========      =========          ==========            =========
Primary earnings per common share
(Loss) income from continuing operations.........        $    0.51      $    1.24          $       --            $    1.18
                                                         =========      =========          ==========            =========
Weighted average number of common shares (in
thousands).......................................          136,148        148,668                                  214,200
                                                         =========      =========          ==========            =========
</TABLE>

See accompanying notes to unaudited pro forma combined condensed financial
information.

             UNAUDITED PRO FORMA COMBINED CONDENSED BALANCE SHEETS
                               AT MARCH 31, 1997
                                 (in millions)



<TABLE>
<CAPTION>
                                                                                                Pro Forma            Pro Forma
                                                                 ADT           Tyco            Adjustments           Combined
                                                             ---------      ---------          ----------            ---------
<S>                                                          <C>            <C>                 <C>                   <C>
ASSETS
     Current assets:
     Cash and cash equivalents...........................     $  492.0      $   63.2            $                     $  555.2
     Accounts receivable, net............................        318.7         956.9                                   1,275.6
     Contracts in process................................         --           125.1                                     125.1
     Inventories.........................................         41.3         839.9                                     881.2
     Deferred income taxes...............................         --           147.5                                     147.5
     Prepaid expenses and other current assets...........         66.8          92.8                                     159.6
                                                             ---------      --------            ---------             --------
     Total current assets................................        918.8       2,225.4                                   3,144.2
     Property, plant and equipment, net..................      1,527.6         997.6                                   2,525.2
     Goodwill and other intangibles, net.................        476.6       2,071.5                                   2,548.1
    Reorganization value in excess of identifiable assets         --            97.8                                      97.8
     Deferred income taxes...............................         --            61.9                                      61.9
     Long-term investments...............................        100.6          --                                       100.6
     Other long-term assets..............................         70.8         152.1                                     222.9
                                                             ---------      --------            ---------             --------
     Total assets........................................    $ 3,094.4      $5,606.3                                  $8,700.7
                                                             =========      ========            =========             ========
LIABILITIES AND SHAREHOLDERS' EQUITY
     Current liabilities:
     Short-term debt.....................................        $74.3        $115.7            $                       $190.0
     Accounts payable(2).................................        173.8         598.2                (30.8)               741.2
     Other current liabilities(2)(5).....................        267.8         706.0                 93.8              1,067.6
     Contracts in process - billings in excess of
     cost................................................          -           148.0                                     148.0
     Income taxes(2).....................................          -           103.6                 12.0                115.6
     Deferred income taxes...............................          -            12.1                                      12.1
                                                             ---------      --------            ---------             --------
     Total current liabilities...........................        515.9       1,683.6                 75.0              2,274.5
     Long-term debt......................................      1,057.1         838.2                                   1,895.3
     Deferred revenue....................................        163.2           -                                       163.2
     Deferred income taxes...............................        102.1          25.8                                     127.9
     Other long-term liabilities.........................        169.3         212.9                                     382.2
                                                             ---------      --------            ---------             --------
     Total liabilities...................................      2,007.6       2,760.5                 75.0              4,843.1
                                                             ---------      --------            ---------             --------
     Retained (deficit) earnings(5)......................     (1,564.7)      1,525.6                (75.0)              (114.1)
     Other shareholders' equity..........................      2,651.5       1,320.2                                   3,971.7
                                                             ---------      --------            ---------             --------
     Total shareholders' equity..........................      1,086.8       2,845.8                (75.0)             3,857.6
                                                             ---------      --------            ---------             --------
     Total liabilities and shareholders' equity..........    $ 3,094.4      $5,606.3                                  $8,700.7
                                                             =========      ========            =========             ========
</TABLE>

  See accompanying notes to unaudited pro forma combined condensed financial
                                 information.


                       NOTES TO UNAUDITED PRO FORMA
                 COMBINED CONDENSED FINANCIAL INFORMATION

         (1) The pro forma combined per share amounts are based on the
combined weighted average of ADT Common Shares and Tyco Common Shares
for all periods presented based on ADT shareholders, through a reverse
stock split, holding 0.48133 of a Combined Company Common Share for each
ADT Common Share and the receipt by Tyco shareholders in the Merger of
one Combined Company Common Share for each Tyco Common Share.

         (2) Certain reclassifications, none of which affects (loss)
income from continuing operations, have been made to the Tyco statements
of income in the pro forma combined statements of income to classify
interest income on a consistent basis.  The pro forma adjustments to the
balance sheet were required to classify on a consistent basis income
taxes payable and employee payroll withholdings.

         (3) Primary (loss) earnings per common share from continuing
operations for ADT, after deducting dividends on ADT convertible
preference shares, was based on adjusted net (loss) income from
continuing operations available to common shareholders of ($687.0)
million in 1996, $30.7 million in 1995 and $69.3 million in 1994.

Primary (loss) earnings per common share from continuing operations for
ADT, after deducting dividends on ADT convertible preference shares, was
based on adjusted net (loss) income from continuing operations available
to common shareholders of $35.0 million and ($705.7) million in the
three months ended March 31, 1997 and 1996, respectively.

Fully diluted earnings per common share from continuing operations for
ADT, after adding Liquid Yield Option Notes discount amortization, was
based on adjusted net income from continuing operations available to
common shareholders of $38.5 million in the three months ended March 31,
1997.

         (4) There were no material transactions between Tyco and ADT
during any of the periods presented.

         (5) Total transaction costs to be incurred by Tyco and ADT in
connection with the Merger are estimated to be approximately $75
million.  These costs, related to legal, printing, accounting, financial
advisory services and other expense, will be charged against income upon
consummation of the Merger.

         (6) A restructuring charge to operations by the Combined
Company is expected to occur subsequent to the Merger to reflect the
combination of the two companies.  Such charges, which are preliminarily
estimated to be approximately $600 million, may include amounts with
respect to the elimination of excess facilities, the write-off of
certain goodwill and fixed assets, severance costs and the satisfaction
of certain liabilities.  The effects of these costs have not been
reflected in this pro forma combined condensed financial information.

         (7) The Tyco share and per share amounts for 1995 and 1994 have
been restated to reflect a two-for-one stock split effected in the form
of a stock dividend which was distributed on November 14, 1995.

         (8) In 1996 ADT recorded certain non-recurring items including
(i) a non-cash charge relating to the write-down of specific assets to
their estimated fair values in accordance with SFAS 121, which occurred
in the three month period ended March 31, (ii) a charge principally
relating to costs associated with integrating the businesses of ASH in
the United Kingdom and the United States into ADT, together with the
costs of administrative accounting, management information and
technological infrastructure enhancements currently being implemented in
the United States electronic security services division, (iii) a gain
arising on the sale of ADT's entire interest in Limelight Group plc,
which was recorded in the balance sheet at a nominal value and (iv) a
gain represented by cash receivable as a result of the settlement of
ADT's litigation against BDO Binder Hamlyn.  ADT's historical net income
for 1996 before these non-recurring items amounted to $140.3 million, or
$0.98 per share ($0.93 per share on a fully diluted basis).  On a pro
forma combined basis, net income for 1996 before these non-recurring
items is $488.4 million, or $2.19 per share ($2.14 per share on a fully
diluted basis).

         (9) In the three months ended March 31, 1997 ADT recorded
certain non-recurring charges in connection with the ADT-Tyco
transaction and the unsolicited proposals of Western.  ADT's historical
net income before these non-recurring items amounted to $44.6 million,
or $0.30 per share ($0.28 per share on a fully diluted basis).  On a pro
forma combined basis, net income for the three months ended March 31,
1997 before these non-recurring items is $151.3 million, or $0.65 per
share ($0.64 per share on a fully diluted basis).

In the three months ended March 31, 1996 ADT recorded certain
non-recurring charges which principally represented non-cash charges
relating to the write down of specific assets to their estimated fair
values in accordance with SFAS 121.  ADT's historical net income before
these non-recurring items amounted to $28.9 million, or $0.21 per share
($0.20 per share on a fully diluted basis).  On a pro forma combined
basis, net income for the three months ended March 31, 1996 before these
non-recurring items is $108.4 million, or $0.50 per share ($0.48 per
share on a fully diluted basis).
    



                        ROLE OF FINANCIAL ADVISORS

   
     In connection with the proposed Merger, Tyco and ADT retained
financial advisors to assist their Boards of Directors in connection with
their consideration of the Merger Agreement.  Tyco retained Credit Suisse
First Boston as its exclusive financial advisor, and ADT retained Merrill
Lynch as its financial advisor.  Tyco and ADT entered into engagement letters
with their financial advisors providing for customary fee, expense
reimbursement and indemnification terms.
    

               In deciding to approve the Merger, the Boards of Directors of
Tyco and ADT considered opinions from their respective financial advisors as
to the fairness of the Exchange Ratio to shareholders from a financial point
of view.  These opinions are described below and are attached as Annexes II
and III to this Joint Proxy Statement/Prospectus.  You are encouraged to
read these opinions in their entirety and to consider them carefully.

Opinion of Tyco's Financial Advisor

   
               Tyco retained Credit Suisse First Boston to act as its
exclusive financial advisor in connection with the Merger based upon Credit
Suisse First Boston's experience and expertise. On March 16, 1997, Credit
Suisse First Boston delivered to the Tyco Board its written opinion that,
based upon and subject to the factors and assumptions set forth therein, as of
such date, the Exchange Ratio was fair from a financial point of view to the
shareholders of Tyco. Credit Suisse First Boston subsequently delivered to the
Tyco Board its written opinion dated the date hereof (the "Credit Suisse First
Boston Opinion") that, based upon and subject to the factors and assumptions
set forth therein, as of such date, the Exchange Ratio was fair from a
financial point of view to the shareholders of Tyco.  No limitations were
imposed by the Tyco Board upon Credit Suisse First Boston with respect to
investigations made or procedures followed by Credit Suisse First Boston in
rendering its opinions.

               The full text of the Credit Suisse First Boston Opinion, which
sets forth the assumptions and qualifications made, matters considered and
limitations on the review undertaken by Credit Suisse First Boston, is
attached as Annex II to this Joint Proxy Statement/Prospectus and is
incorporated herein by reference. Shareholders of Tyco are urged to read the
Credit Suisse First Boston Opinion in its entirety and to consider it
carefully. The opinion of Credit Suisse First Boston dated March 16, 1997 was
provided to the Tyco Board for its information in connection with its
consideration of the Merger and does not constitute a recommendation to any
shareholder as to how to vote on the Merger. The summary of the Credit Suisse
First Boston Opinion set forth in this Joint Proxy Statement/Prospectus is
qualified in its entirety by reference to the full text of the Credit Suisse
First Boston Opinion set forth in Annex II and incorporated herein by
reference.

               The summary set forth below does not purport to be a complete
description of the analyses underlying the Credit Suisse First Boston Opinion
or the presentation made by Credit Suisse First Boston to the Tyco Board. The
preparation of a fairness opinion is a complex analytic process involving
various determinations as to the most appropriate and relevant methods of
financial analyses and the application of those methods to the particular
circumstances, and, therefore, such an opinion is not readily susceptible to
partial analysis or summary description. In arriving at its opinions, Credit
Suisse First Boston did not attribute any particular weight to any analysis or
factor considered by it, but rather made qualitative judgments as to the
significance and relevance of each analysis and factor. Accordingly, Credit
Suisse First Boston believes that its analyses must be considered as a whole
and that selecting portions of its analyses, without considering all analyses,
would create an incomplete view of the process underlying the Credit Suisse
First Boston Opinion.

               In performing its analyses, Credit Suisse First Boston made
numerous assumptions with respect to industry performance, general business,
economic, market and financial conditions and other matters, many of which are
beyond the control of Tyco or ADT. Any estimates contained in the analyses
performed by Credit Suisse First Boston are not necessarily indicative of
actual values or future results, which may be significantly more or less
favorable than suggested by such analyses. Additionally, estimates of the
value of businesses or securities do not purport to be appraisals or to
reflect the prices at which such businesses or securities might actually be
sold. Accordingly, such analyses and estimates are inherently subject to
substantial uncertainty. In addition, the opinion of Credit Suisse First
Boston dated March 16, 1997 and Credit Suisse First Boston's presentation to
the Tyco Board were among several factors taken into consideration by the Tyco
Board in making its determination to approve the Merger. Consequently, the
Credit Suisse First Boston analyses described below should not be viewed as,
and were not, determinative of the opinion of the Tyco Board or Tyco's
management with respect to the Exchange Ratio.

               In arriving at its opinions, Credit Suisse First Boston
reviewed certain publicly available business and financial information
relating to Tyco and ADT, as well as the Merger Agreement. Credit Suisse First
Boston also reviewed certain other information, including financial forecasts,
provided to it by Tyco and ADT, and met with the managements of Tyco and ADT
to discuss the business and prospects of Tyco and ADT. In addition, Credit
Suisse First Boston reviewed certain estimates provided to it by Tyco of the
cost savings and synergies expected to result from the Merger, and met with
the management of Tyco to discuss such cost savings and synergies. Credit
Suisse First Boston also considered certain financial and stock market data of
Tyco and ADT, compared that data with similar data for other publicly held
companies in businesses similar to those of Tyco and ADT and considered the
financial terms of certain other business combinations and other transactions
which have recently been effected. In addition, Credit Suisse First Boston
considered such other information, financial studies, analyses and
investigations and financial, economic and market criteria that it deemed
relevant.

               In connection with its review, Credit Suisse First Boston did
not assume any responsibility for independent verification of any of the
foregoing information and relied on such information being complete and
accurate in all material respects. With respect to financial forecasts, Credit
Suisse First Boston assumed that they were reasonably prepared on bases
reflecting the best currently available estimates and judgments of the
managements of Tyco and ADT as to the future financial performance of Tyco and
ADT. Credit Suisse First Boston also assumed that the estimates provided to it
by Tyco of the cost savings and synergies expected to result from the Merger
reflect the best currently available estimates and judgments of such
management as to such cost savings and synergies. Credit Suisse First Boston
relied on the conclusions of Tyco and its counsel as to the impact of the
Merger on the current tax status of ADT. Credit Suisse First Boston did not
make an independent evaluation or appraisal of the assets or liabilities
(contingent or otherwise) of Tyco or ADT, nor was it furnished with any such
evaluations or appraisals. The Credit Suisse First Boston Opinion is
necessarily based upon financial, economic, market and other conditions as
they existed and could be evaluated on the date hereof. Credit Suisse First
Boston did not express any opinion as to what the value of the Combined Company
Common Shares actually will be when issued to Tyco's shareholders pursuant to
the Merger or the prices at which the Combined Company Common Shares will
trade subsequent to the Merger.

               The following is a summary of the analyses performed by Credit
Suisse First Boston in connection with the preparation of the opinion of
Credit Suisse First Boston dated March 16, 1997.  Credit Suisse First Boston
reviewed and updated such analyses in connection with its preparation of the
Credit Suisse First Boston Opinion.

               Comparative Stock Price Performance Analysis. Credit Suisse
First Boston reviewed the per share daily closing prices of Tyco Common Shares
and of ADT Common Shares over the period from March 14, 1996 to March 14, 1997
compared with the performance of the Standard & Poor's 500 Index ("S&P 500").

               Discounted Cash Flow Analysis. Credit Suisse First Boston
performed a discounted cash flow analysis for fiscal years 1997 to 2006 to
estimate the present value of the stand-alone unlevered free cash flows that
the ADT Security Services businesses (i.e., all of ADT excluding CarCop and
the vehicle auction businesses) ("Security Services") are expected to generate
if Security Services performs in accordance with scenarios based on certain
financial forecasts. For purposes of this analysis, unlevered free cash flows
were defined as net income plus depreciation plus amortization plus deferred
taxes less capital expenditures less investment in working capital.
    

               Credit Suisse First Boston performed its analyses based on
financial forecasts provided to it by ADT, which were adjusted for three
separate scenarios for Security Services: a management case (the "ADT
Management Case"), an adjusted ADT Management Case (the "Adjusted Case") and a
conservative case (the "Conservative Case"). The ADT Management Case reflects
ADT's current budget, including ADT management forecasts for fiscal years 1997
through 2001 and forecasts for fiscal years 2002 through 2006 based upon the
first five years' performance, as adjusted to reflect reduced growth rates in
new subscribers. The Adjusted Case was developed by Credit Suisse First Boston
and reviewed and approved by Tyco management. The Adjusted Case adjusts the
ADT Management Case to provide for slower installation growth in the
residential and commercial markets and higher expenses. The Conservative Case
was developed by Credit Suisse First Boston. The Conservative Case reflects
adjustments to the Adjusted Case to provide for slower installation growth in
the residential and commercial markets and higher expenses.

   
               Credit Suisse First Boston calculated terminal values for
Security Services by applying a range of multiples of earnings before
interest, taxes, depreciation and amortization ("EBITDA") to the fiscal year
2006 EBITDA from 7.0x to 8.0x in each of the above three scenarios. These
EBITDA multiples were based on ADT's current trading multiples of 9.7x fiscal
year 1996 EBITDA and 7.6x fiscal year 1997 estimated EBITDA as well as ADT's
tax rate of 30% for book purposes and 11.0% to 15.0% on a cash basis. The
unlevered free cash flow streams and terminal values were then discounted
using a range of discount rates from 11.5% to 12.5%. The discount rate range
was selected based on an analysis of ADT's weighted average cost of capital.
Based on this analysis, the enterprise values for Security Services ranged
from $5.1 billion to $6.1 billion for the ADT Management Case, $4.2 billion to
$5.0 billion for the Adjusted Case and $3.9 billion to $4.6 billion for the
Conservative Case. Credit Suisse First Boston calculated the implied equity
value ranges for each of these cases by subtracting from the enterprise value
ranges the value of ADT's non-convertible debt of $792 million and adding the
value of ADT's cash, long-term investments, option and warrant proceeds of
$831 million and the estimated value range for ADT's Car Cop and Auto Auction
businesses of $500 to $600 million. Based on this analysis and assuming 193.8
million fully-diluted ADT Common Shares outstanding, the implied equity values
for ADT ranged from $29.10 to $34.77 per ADT Common Share for the ADT
Management Case, $24.45 to $29.10 per ADT Common Share for the Adjusted Case,
and $22.91 to $27.03 per ADT Common Share for the Conservative Case.
Accordingly, based upon the March 14, 1997 closing price of Tyco Common Stock
of $60.25, the foregoing analysis could be used to imply a range of exchange
ratios of 0.380 to 0.577.

               Credit Suisse First Boston also considered the potential
synergies from cost savings that Tyco management anticipates would result from
the Merger. Based on Tyco management's estimated cost savings of $40.0
million, $50.0 million and $60.0 million in fiscal years 1998, 1999 and 2000,
respectively, and an assumed growth rate of 3.0% per year thereafter with an
11.0% to 12.0% capitalization rate, Credit Suisse First Boston estimated a
range of present values for such cost savings of $364.0 million to $411.0
million (or $1.88 to $2.12 per ADT Common Share). Including synergies, the
implied equity values (based on the same adjustments to enterprise value
described above) for ADT ranged from $30.98 to $36.89 per ADT Common Share for
the ADT Management Case, $26.33 to $31.22 per ADT Common Share for the
Adjusted Case and $24.79 to $29.15 per ADT Common Share for the Conservative
Case.  Accordingly, based upon the March 14, 1997 closing price of Tyco Common
Stock of $60.25, the foregoing analysis could be used to imply a range of
exchange ratios of 0.411 to 0.612.

               Contribution Analysis. Credit Suisse First Boston reviewed the
relative contribution of Tyco and ADT to fiscal years 1997 and 1998 operating
cash flow and net income and derived therefrom an implied exchange ratio and
estimated implied ADT share values. Fiscal years 1997 and 1998 operating cash
flow and net income estimates were based on, for Tyco, discussions with Tyco
management and, for ADT, the Adjusted Case. For Tyco, operating cash flow and
net income for fiscal year 1997 were estimated to be $963.0 million and $391.7
million, respectively, which amounts do not reflect the impact of certain
acquisitions consummated by Tyco during the third quarter of fiscal year 1997
(or $5.70 and $2.32, respectively, per Tyco Common Share (based on Tyco Common
Shares outstanding assuming Tyco's February 27, 1997 equity offering had been
completed on July 1, 1996)), and, for fiscal year 1998, $1.076 billion and
$487.8 million, respectively, which amounts do not reflect the impact of
certain acquisitions consummated by Tyco during the third quarter of fiscal
year 1997 (or $6.37 and $2.89, respectively, per Tyco Common Share (based on
Tyco Common Shares outstanding assuming Tyco's February 27, 1997 equity
offering had been completed on July 1, 1996)). For ADT, operating cash flow
and net income for fiscal year 1997 were estimated to be $514.7 million and
$178.9 million, respectively (or $2.66 and $0.92, respectively, per ADT Common
Share), and, for fiscal year 1998, $630.8 million and $267.8 million,
respectively (or $3.26 and $1.38, respectively, per ADT Common Share). This
analysis yielded implied exchange ratios, based on estimated operating cash
flow and net income for fiscal year 1997, of 0.466 and 0.398, respectively,
and, for fiscal year 1998, 0.511 and 0.479, respectively. Credit Suisse First
Boston assumed a share price for Tyco Common Shares of $60.25 which indicated
estimated implied ADT Common Share values, based upon operating cash flow and
net income for fiscal year 1997, of $28.08 and, for fiscal year 1998, $30.80
and $28.85, respectively.
    

               Pro Forma Analysis. Based on the Adjusted Case forecasts for
ADT and Tyco management's forecasts for Tyco, Credit Suisse First Boston
analyzed pro forma earnings per share ("EPS") for Tyco for fiscal years 1998,
1999 and 2000. Excluding one-time restructuring charges, Credit Suisse First
Boston estimated increases in EPS for the Combined Company in fiscal years
1998, 1999 and 2000 of 6.9%, 14.1% and 15.6%, respectively.

               Pursuant to a letter agreement dated March 15, 1997 between
Tyco and Credit Suisse First Boston, Tyco agreed to pay Credit Suisse First
Boston for services rendered thereunder a fee of up to $5 million, to be paid
upon the closing of the Merger. Tyco also agreed to reimburse Credit Suisse
First Boston for all out-of-pocket expenses, including the fees and expenses
of its legal counsel and any other advisor retained by Credit Suisse First
Boston, resulting from or arising out of the engagement. Tyco further agreed
to indemnify Credit Suisse First Boston and certain related persons and
entities for certain losses, claims, damages or liabilities (including actions
or proceedings in respect thereof) related to or arising out of, among other
things, its engagement as financial advisor.

               Tyco retained Credit Suisse First Boston based upon Credit
Suisse First Boston's experience and expertise. In the past, Credit Suisse
First Boston has performed certain investment banking services for Tyco and ADT
and has received customary fees for such services. Credit Suisse First Boston
is an internationally recognized investment banking and advisory firm. Credit
Suisse First Boston, as part of its investment banking business, is
continuously engaged in the valuation of businesses and securities in
connection with mergers and acquisitions, negotiated underwritings,
competitive biddings, secondary distributions of listed and unlisted
securities, private placements, and valuations for corporate and other
purposes. In the ordinary course of business, Credit Suisse First Boston and
its affiliates may actively trade the debt and equity securities of both Tyco
and ADT for their own account and for the accounts of customers and,
accordingly, may at any time hold a long or short position in such securities.

Opinion of ADT's Financial Advisor

   
               The ADT Board engaged Merrill Lynch to act as its financial
advisor in connection with the transactions contemplated by the Merger
Agreement based upon Merrill Lynch's qualifications, expertise and reputation,
as well as Merrill Lynch's prior investment banking relationships and
familiarity with ADT and Tyco.  In addition, Merrill Lynch has been acting,
and continues to act, as financial advisor to ADT in connection with the
Western Offer and the Western Proposals Meeting.  On March 16, 1997, Merrill
Lynch rendered its oral opinion, which Merrill Lynch subsequently confirmed in
writing as of March 17, 1997 and as of the date thereof (the opinion dated as
of the date hereof, the "Merrill Lynch Opinion"), to the ADT Board that, as of
such dates, and based upon the assumptions made, matters considered and limits
of review described in the opinion, the Exchange Ratio was fair to the
shareholders of ADT from a financial point of view.
    

               A copy of the Merrill Lynch Opinion, setting forth the
assumptions made, matters considered and limitations on the scope of review
undertaken by Merrill Lynch, is attached as Annex III  to this Joint Proxy
Statement/Prospectus.  Merrill Lynch addressed its opinion to the ADT Board.
The Merrill Lynch Opinion is directed only to the fairness of the Exchange
Ratio to the shareholders of ADT from a financial point of view and does not
address the merits of the underlying decision of ADT to engage in the Merger
or constitute a recommendation to any shareholder as to how such shareholder
should vote on matters relating to the Merger.  The following discussion
regarding the Merrill Lynch Opinion is qualified in its entirety by reference
to the full text of the Merrill Lynch Opinion.

               In arriving at the Merrill Lynch Opinion, Merrill Lynch (i)
reviewed Tyco's Annual Reports on Form 10-K and related audited financial
statements for the five fiscal years ended June 30, 1996, Tyco's Quarterly
Reports on Form 10-Q and the related unaudited financial statements for the
quarterly periods ending September 30, 1996 and December 31, 1996, and Tyco's
Prospectus dated February 5, 1997 and the related Prospectus Supplement dated
February 27, 1997 with respect to the offer and sale by Tyco of 10,000,000 Tyco
Common Shares (the "February 1997 Offering"); (ii) reviewed ADT's Annual
Reports on Form 10-K and related audited financial statements for the five
fiscal years ended December 31, 1995, ADT's Quarterly Reports on Form 10-Q and
the related unaudited financial statements for the quarterly periods ending
March 31, 1996, June 30, 1996 and September 30, 1996, ADT's filings with the
SEC in connection with ADT's proposed merger with Republic that was terminated
in September 1996 and ADT's Current Report on Form 8-K, as amended to
September 5, 1996, filed in connection with the acquisition by ADT of ASH;
(iii) reviewed certain financial information, including financial forecasts,
relating to the financial condition, business, earnings, cash flow, assets,
liabilities, and prospects of Tyco and ADT, that were furnished to Merrill
Lynch by Tyco and ADT, respectively; (iv) conducted discussions with members
of senior management of Tyco and ADT concerning their respective financial
condition, business, earnings, cash flow, assets, liabilities, operations,
contingencies and prospects; (v) reviewed the historical market prices and
trading activity for Tyco Common Shares and ADT Common Shares and compared
such data with indices that Merrill Lynch deemed relevant; (vi) compared the
respective financial condition and results of operations of Tyco and ADT with
that of certain publicly traded companies that Merrill Lynch deemed to be
relevant; (vii) compared the proposed financial terms of the transactions
contemplated by the Agreement with the financial terms of certain other
mergers and acquisitions that Merrill Lynch deemed to be relevant; (viii)
reviewed the amount and timing of the projected cost savings, the related
expenses required to achieve such savings, and the revenue enhancements
expected to result from the Merger (the "Expected Synergies"), as presented by
the managements of ADT and Tyco; (ix) considered the pro forma impact of the
transactions contemplated by the Merger Agreement on the income statement,
balance sheet and cash flows of ADT; (x) reviewed a draft of the Merger
Agreement dated March 15, 1997; and (xi) reviewed such other financial studies
and analyses and performed such other investigations and took into account
other matters that Merrill Lynch deemed necessary.

               In preparing the Merrill Lynch Opinion, with ADT's consent
Merrill Lynch assumed and relied on the accuracy and completeness of all
information supplied or otherwise made available to Merrill Lynch by ADT and
Tyco.  Merrill Lynch did not assume responsibility for independently verifying
that information or undertake an independent evaluation or appraisal of the
assets or liabilities, contingent or otherwise, of ADT or Tyco or any of their
subsidiaries, nor was Merrill Lynch furnished any such evaluation or
appraisal.  In addition, Merrill Lynch did not conduct any physical inspection
of the properties or facilities of ADT or Tyco.  With respect to the financial
forecasts (including the Expected Synergies) furnished by ADT and Tyco, with
ADT's consent, Merrill Lynch assumed that those forecasts were reasonably
prepared and reflected the best currently available estimates, allocations and
judgements of the respective managements of ADT and Tyco as to the future
financial performance of ADT, Tyco or the Combined Company, as the case may
be.  Merrill Lynch also assumed with ADT's consent that the Merger will be
accounted for as a pooling of interests under U.S. GAAP.

               The Merrill Lynch Opinion was necessarily based upon market,
economic and other conditions as they existed and could be evaluated on the
date of the Merrill Lynch Opinion.  In rendering the Merrill Lynch Opinion,
Merrill Lynch assumed with ADT's consent that, in the course of obtaining the
necessary regulatory or other consents or approvals for the Merger, no
restrictions, including any divestiture requirements or amendments or
modifications, will be imposed that will have a material adverse effect on the
contemplated benefits of the Merger.

               Merrill Lynch was not authorized or requested to, and,
accordingly, with ADT's consent did not, solicit any other company or person
with respect to entering into a business combination with or acquisition of
ADT.

               In rendering the Merrill Lynch Opinion, Merrill Lynch took the
Western Offer into account.

               The following summarizes certain financial and comparative
analyses presented by Merrill Lynch to the ADT Board at its meeting on March
16, 1997.  These analyses were also among the analyses considered by Merrill
Lynch in rendering the Merrill Lynch Opinion.  This summary does not purport
to be a complete description of the analyses underlying the Merrill Lynch
Opinion.

   
               In performing its analyses, Merrill Lynch utilized two sets of
projections provided by ADT's management (respectively, "ADT's Sensitivity
Case" and "ADT's Base Case") and two sets of projections provided by Tyco's
management (respectively, "Tyco's Sensitivity Case" and "Tyco's Base Case"),
as well as estimates of future earnings and earnings growth published by First
Call Corp. ("First Call") and I/B/E/S International, Inc. ("I/B/E/S").  First
Call and I/B/E/S are on-line data services that monitor and publish
compilations of earnings estimates produced by selected research analysts on
certain public companies.  In addition, Merrill Lynch performed its analyses
and made its presentation to the ADT Board without taking into account the
Reverse Stock Split because, at the time such analyses were performed, the
Reverse Stock Split was scheduled to occur after the Merger.  For this reason,
the Merrill Lynch analyses were based on a pre-Reverse Stock Split Exchange
Ratio of 2.0776 ADT Common Shares for each Tyco Common Share.

               Overview of Proposed Merger.  Based on Tyco's closing stock
price of $60.25 per Tyco Common Share as of March 14, 1997 (the last trading
day prior to public announcement of the proposed transaction) ("Tyco's Closing
Price") and the pre-Reverse Stock Split Exchange Ratio of 2.0776 ADT Common
Shares for each Tyco Common Share, Merrill Lynch determined that the proposed
transaction provided an implied price to ADT shareholders of $29.00 per ADT
Common Share (determined by dividing Tyco's Closing Price by the Exchange
Ratio) (the "Implied Price") and an implied premium to ADT shareholders of (i)
33.3% based on ADT's closing stock price of $21.75 per ADT Common Share on
March 14, 1997 (the last trading day prior to announcement of the proposed
Merger) ("ADT's Closing Price") and (ii) 44.1% based on ADT's closing stock
price of $20.13 per ADT Common Share on December 17, 1997 (the last trading
day prior to the initial announcement of the Western Offer) (the "Reference
Price").  In addition, Merrill Lynch determined that, on a pro forma
fully-diluted basis, ADT shareholders would own approximately 35.6% of the
Combined Company and Tyco shareholders would own approximately 64.4% of the
Combined Company.

               Merrill Lynch analyzed the aggregate transaction value of the
Merger, based on the Implied Price, as a multiple of certain ADT historical
and projected (based on ADT's Sensitivity Case) financial data, as follows:

                              Earnings before             ADT's Annualized
      EBITDA            Interest and Taxes ("EBIT")      Recurring Revenues
- -------------------     --------------------------       ------------------
FY 1996    FY 1997       FY 1996           FY 1997
- -------    -------       -------           -------

 12.2x      9.3x          24.0x             15.9x               6.0x




               Merrill Lynch further determined that the Implied Price
represented a multiple of ADT's EPS based on First Call estimates of 24.6x for
FY1997 and 20.7x for FY1998.

               Merrill Lynch analyzed a variety of price-to-earnings ratios
(each, a "P/E Ratio") for Tyco (based on Tyco's Closing Price) and ADT (based
on ADT's Closing Price and  the Implied Price) using calendarized earnings
estimates based on data provided by ADT and Tyco, as well as First Call and
I/B/E/S data.  The P/E Ratios for Tyco and ADT were as follows:

<TABLE>
<CAPTION>
                                         1997 P/E Ratios                                       1998 P/E Ratios
                            ------------------------------------------            ------------------------------------------
                            Sensitivity                                           Sensitivity
Based on                       Case          Base Case      First Call               Case          Base Case      First Call
- --------                    -----------      ---------      ----------            -----------      ---------      ----------
<S>                        <C>              <C>            <C>                   <C>              <C>            <C>

Tyco's Closing Price...        22.5x           21.8x          21.8x                  19.8x           18.1x          18.4x

ADT's Closing Price....        16.7x           16.4x          18.4x                  13.5x           12.8x          15.5x

ADT's Implied Price....        22.3x           21.8x          24.6x                  18.0x           17.1x          20.7x

</TABLE>

               Merrill Lynch also analyzed Tyco's and ADT's 1997 P/E Ratios
divided by their respective estimated five-year earnings growth rates as
published by I/B/E/S ("P/E Growth Multiple") as follows:

Based on                    Sensitivity Case      Base Case      First Call
- --------                    ----------------      ---------      ----------
Tyco's Closing Price...           125%              121%            121%
ADT's Closing Price....            93%               91%            102%
ADT's Implied Price....           124%              121%            137%
    


               Merrill Lynch reviewed and charted the daily closing price of
ADT Common Shares and Tyco Common Shares for the year ended March 12, 1997 and
the weekly closing price of ADT Common Shares and Tyco Common Shares for the
three years ended March 12, 1997.  Merrill Lynch indexed that data against the
closing price performance of the S&P 500 over the same periods.  Merrill Lynch
also reviewed and charted the daily trading volume of Tyco Common Shares over
the one- and three-year periods ended March 12, 1997.

   
               ADT Discounted Cash Flow Analysis.  Merrill Lynch presented a
discounted cash flow analysis of ADT based upon ADT's Sensitivity Case and
ADT's Base Case with respect to ADT's five-year stream of unlevered free cash
flow and each of (i) terminal values based upon multiples of 8.0x, 8.5x and
9.0x projected FY 2001 EBITDA ("EBITDA Terminal Value Methodology") and (ii)
terminal values based upon multiples of 17.0x, 18.0x and 19.0x projected FY
2001 tax effected EBIT before goodwill amortization ("EBITA") ("EBITA Terminal
Value Methodology"), applying a range of discount rates resulting from an
analysis of ADT's weighted average cost of capital of 11.0%, 11.5%, 12.0%,
12.5% and 13.0%.  This analysis resulted in (a) with respect to ADT's Base
Case, total equity value per share ranging from (I) $29.63 to $35.64 based on
EBITDA Terminal Value Methodology and (II) $29.35 to $35.09 based on EBITA
Terminal Value Methodology, and (b) with respect to ADT's Sensitivity Case,
total equity value ranging from (I) $26.16 to $31.40 based on EBITDA Terminal
Value Methodology and (II) $25.14 to $29.98 based on EBITA Terminal Value
Methodology.  Merrill Lynch also performed and summarized a variety of
sensitivity analyses with respect to ADT's discounted cash flows (under both
ADT's Sensitivity Case and ADT's Base Case) that considered the effect of
changes to certain variables, including ADT's residential installation growth
rate, residential installation fees and cancellation rates.  Merrill Lynch
performed the ADT discounted cash flow analysis as one of several
methodologies assessing the equity value of ADT on a standalone basis and to
enable a comparison with a variety of valuation methodologies assessing the
equity value of Tyco.
    

               ADT Comparable Companies Analysis. Merrill Lynch compared
certain financial and operating information data, including market value of
common equity ("Market Value") and market capitalization (Market Value plus
preferred equity at liquidation value, short-term debt, long-term debt and
minority interest, less cash and marketable securities) ("Market
Capitalization"), for ADT with the following companies (collectively, the "ADT
Public Comparables"):  Borg-Warner Security Corporation, Holmes Protection
Group, Inc., Honeywell Inc., Pittston Brink's Group, Protection One, Inc., and
Rollins, Inc.  In performing the comparable companies analysis with respect to
ADT, Merrill Lynch used calendarized earnings estimates for the ADT Public
Comparables based on First Call and I/B/E/S data, and Merrill Lynch used the
Reference Price for ADT.  Merrill Lynch determined that with respect to (i)
Market Capitalization as a multiple of  sales for the latest twelve months
("LTM") for the ADT Public Comparables, the mean was 1.65x and the median was
1.33x, compared to 2.16x for ADT, (ii) Market Capitalization as a multiple of
LTM EBITDA for the ADT Public Comparables, the mean was 9.0x and the median
was 9.1x, compared to 8.4x for ADT,  and (iii) Market Capitalization as a
multiple of LTM EBIT for the ADT Public Comparables, the mean was 13.1x and the
median was 13.3x, compared to 16.6x for ADT.  Merrill Lynch also determined
that with respect to P/E Ratios for the ADT Public Comparables, the mean was
24.2x for 1996, 19.0x for 1997 and 14.9x for 1998 and the median was 25.2x for
1996, 17.5x for 1997 and 14.9x for 1998, compared to 21.0x for 1996, 17.1x for
1997 and 14.4x for 1998 for ADT.  Merrill Lynch also determined the mean and
median 1997 P/E Ratios as multiples of the sum of current dividend yield plus
the five-year I/B/E/S projected EPS growth rate for the ADT Public Comparables
were 1.25x and 1.22x, respectively, compared to 0.95x for ADT.  Merrill Lynch
also determined that with respect to (i) the LTM EBITDA margin for the ADT
Public Comparables, the mean was 18.4% and the median was 14.1%, compared to
25.8% for ADT, (ii) the LTM EBIT margin for the ADT Public Comparables, the
mean was 8.8% and the median was 9.0%, compared to 13.0% for ADT, (iii) the
estimated EPS growth rate from 1996 to 1997 for the ADT Public Comparables,
the mean was 30.7% and the median was 15.1%, compared to 22.9% for ADT, (iv)
the I/B/E/S five-year projected EPS growth rate for the ADT Public
Comparables, the mean was 17.4% and the median 15.0%, compared to 18.0% for
ADT, and (iv) the dividend yield for the ADT Public Comparables, the mean was
0.8% and the median was 0.2%, compared to 0.0% for ADT.  Merrill Lynch
determined, however, that because of ADT's size and market leadership position
and the quality of its contractually recurring revenue base, as well as the
differing lines of business comprising each of the ADT Public Comparables, the
comparable company analysis was not indicative of the value of ADT Common
Shares.

               ADT Comparable Acquisitions Analysis.  Merrill Lynch also
reviewed the financial terms of fourteen acquisitions of security companies
(the "Selected Acquisitions").  Merrill Lynch analyzed ratios comparing offer
value ("Offer Value") and transaction value ("Transaction Value") to various
financial data.  Merrill Lynch determined that, with respect to (i) Offer
Value (for acquisitions of less than 100% of the target's equity, Offer Value
was equal to purchase price grossed-up as if 100% of the target's entity was
acquired) as a multiple of net income, the mean was 26.0x and the median was
26.6x, (ii) Offer Value as a multiple of book value, the mean was 1.41x and
the median was 2.09x, (iii) Transaction Value as a multiple of LTM EBIT, the
mean was 14.9x and the median was 14.1x, (iv) Transaction Value as a multiple
of LTM EBITDA, the mean was 9.7x and the median was 9.3x, and (v) Transaction
Value as a multiple of LTM sales, the mean was 1.86x and the median was 2.14x.
Merrill Lynch determined, however, that because of ADT's size and market
leadership position, and the quality of its contractually recurring revenue
base, the comparable acquisitions analysis was not indicative of the value of
ADT Common Shares.

               Tyco Comparable Companies Analysis.  Merrill Lynch compared
certain financial and operating information data, including Market Value and
Market Capitalization, for Tyco with the following companies (the "Tyco Public
Comparables"):  AlliedSignal Inc., Dover Corporation, Emerson Electric Co.,
General Electric Company and United Technologies Corporation.  Using earnings
estimates for the Tyco Public Comparables and Tyco based on First Call
estimates calendarized to reflect a December 31st year end, Merrill Lynch
determined that with respect to Market Value as a multiple of (i) LTM net
income applicable to common for the Tyco Public Comparables, the mean was
21.0x and the median was 21.2x, compared to 29.1x for Tyco, (ii) estimated
1997 EPS for the Tyco Public Comparables, the mean was 18.5x and the median was
19.0x, compared to 21.8x for Tyco, (iii) estimated 1998 EPS for the Tyco
Public Comparables, the mean was 16.4x and the median was 16.5x, compared to
18.4x for Tyco, (iv) LTM cash flow (income available to common plus
depreciation, depletion and amortization and deferred taxes, less unremitted
earnings of unconsolidated subsidiaries) for the Tyco Public Comparables, the
mean was 13.0x and the median was 13.6x, compared to 17.2x for Tyco, and (v)
latest fiscal quarter common shareholders' equity for the Tyco Public
Comparables, the mean was 4.73x and the median was 4.74x, compared to 4.55x
for Tyco.  Merrill Lynch also determined that for the Tyco Public Comparables
the mean quotient of 1997 P/E Ratio divided by I/B/E/S projected five-year EPS
growth was 150%, compared to 121% for Tyco.  Merrill Lynch determined that with
respect to Market Capitalization as a multiple of (i) LTM EBITDA for the Tyco
Public Comparables, the mean was 9.8x and the median was 10.0x, compared to
12.8x for Tyco, (ii) LTM EBIT for the Tyco Public Comparables, the mean was
12.9x and the median was 12.3x, compared to 16.1 for Tyco, and (iii) LTM sales
for the Tyco Public Comparables, the mean was 1.67x and the median was 1.60x,
compared to 1.86x for Tyco.

               Comparative Discounted Cash Flow Analysis.  Merrill Lynch
analyzed the relative discounted cash flow values of a Tyco Common Share and
an ADT Common Share by using data from the ADT discounted cash flow analysis
described above (utilizing discount rates of 11.5%, 12.0% and 12.5% and
terminal EBITDA multiples of 8.0x, 8.5x and 9.0x) and data from a discounted
cash flow analysis of Tyco performed using methods similar to those used in
performing the ADT discounted cash flow analysis.  With respect to Tyco,
Merrill Lynch applied discount rates of 12.0%, 12.5% and 13.0% (derived from
an analysis of Tyco's weighted average cost of capital) and terminal EBITDA
multiples of 11.5x, 12.0x and 12.5x resulting in Tyco equity values per share
ranging from (i) $71.15 to $80.19 based on Tyco's Base Case and (ii) $64.92 to
$73.17 based on Tyco's Sensitivity Case.  Merrill Lynch then compared the Tyco
equity values per Tyco Common Share and the equity values per ADT Common Share
and arrived at ranges of implied exchange ratios ("DCF Implied Exchange
Ratios") from (i) 2.294 to 2.357 based on ADT's Base Case and Tyco's Base
Case, (ii) 2.603 to 2.671 based on Tyco's Base Case and ADT's Sensitivity
Case, (iii) 2.093 to 2.151 based on Tyco's Sensitivity Case and ADT's Base
Case and (iv) 2.374 to 2.438 based on Tyco's Sensitivity Case and ADT's
Sensitivity Case.  Merrill Lynch also compared the DCF Implied Exchange Ratios
to the pre-Reverse Stock Split Exchange Ratio of 2.0776 ADT Common Shares for
each Tyco Common Share.

   
               Impact of Expected Synergies.  Merrill Lynch also calculated
discounted cash flow values for two projected cases for Expected Synergies
(the "High Synergy Case" and the "Low Synergy Case") to ascertain the effect
of attributing some or all of the Expected Synergies to Tyco's equity value
for purposes of the Comparative Discounted Cash Flow Analysis.  For this
purpose, Merrill Lynch attributed 50% and 100% of the discounted cash flow
values of the Expected Synergies to Tyco's equity values per share for
purposes of the analysis of relative discounted cash flows referred to in the
preceding paragraph.  Merrill Lynch concluded that the incremental effect of
attributing the Expected Synergies to Tyco's equity value on the DCF Implied
Exchange Ratios for ADT's Sensitivity Case and ADT's Base Case (as set forth
in the preceding paragraph) ranged from (i) 0.0387 to 0.0457 if 50% of the Low
Synergy Case were attributed to Tyco's standalone value, (ii) 0.0774 to 0.0915
if 100% of the Low Synergy Case were attributed to Tyco's standalone value,
(iii) 0.0703 to 0.0832 if 50% of the High Synergy Case were attributed to
Tyco's standalone value and (iv) 0.1407 to 0.1663 if 100% of the High Synergy
Case were attributed to Tyco's standalone value.
    

               Contribution Analysis.  Merrill Lynch performed a contribution
analysis and determined the respective contributions of ADT and Tyco to the
projected pro forma combined fully-diluted net income applicable to common and
cash flow (fully-diluted net income applicable to common plus depreciation and
amortization less capital expenditures), assuming no synergies or transaction
adjustments.  Merrill Lynch noted that ADT shareholders would account for
35.6% of the Combined Company's common equity on a fully-diluted basis.  Based
on Tyco's Base Case and ADT's Base Case, Merrill Lynch estimated that ADT
would contribute (i) 34.3% in FY 1997, 36.1% in FY 1998, 37.6% in FY 1999,
38.1% in FY 2000 and 38.5% in FY 2001 to the Combined Company's projected pro
forma fully-diluted net income applicable to common and (ii) 11.5% in FY 1997,
20.1% in FY 1998, 27.1% in FY 1999, 27.3% in FY 2000 and 27.7% in FY 2001 to
the Combined Company's projected pro forma cash flow. Based on Tyco's Base
Case and ADT's Sensitivity Case, Merrill Lynch estimated that ADT would
contribute (i) 33.8% in FY 1997, 34.7% in FY 1998, 35.5% in FY 1999, 35.1% in
FY 2000 and 34.7% in FY 2001 to the Combined Company's projected pro forma
fully-diluted net income applicable to common and (ii) 10.7% in FY 1997, 19.9%
in FY 1998, 27.0% in FY 1999, 27.2% in FY 2000 and 27.3% in FY 2001 to the
Combined Company's projected pro forma cash flow.  Based on Tyco's Sensitivity
Case and ADT's Base Case, Merrill Lynch estimated that ADT would contribute
(i) 35.1% in FY 1997, 38.2% in FY 1998, 40.5% in FY 1999, 40.7% in FY 2000 and
41.1% in FY 2001 to the Combined Company's projected pro forma fully-diluted
net income applicable to common and (ii) 11.8% in FY 1997, 21.5% in FY 1998,
29.2% in FY 1999, 29.1% in FY 2000 and 29.4% in FY 2001 to the Combined
Company's projected pro forma cash flow.  Based on Tyco's Sensitivity Case and
ADT's Sensitivity Case, Merrill Lynch estimated that ADT would contribute (i)
34.6% in FY 1997, 36.8% in FY 1998, 38.2% in FY 1999, 37.6% in FY 2000 and
37.1% in FY 2001 to the Combined Company's projected pro forma fully-diluted
net income applicable to common and (ii) 11.0% in FY 1997, 21.2% in FY 1998,
29.1% in FY 1999, 28.9% in FY 2000 and 29.0% in FY 2001 to the Combined
Company's projected pro forma cash flow.

   
               Pro Forma Accretion/Dilution Analysis. Merrill Lynch performed
an accretion/dilution analysis to ascertain the projected effect of the Merger
on ADT's estimated EPS.  Based on the High Synergy Case, from ADT's
perspective, the pro forma impact on ADT's estimated EPS would be (i)
accretive by 3.7% in FY 1997 and 2.3% in FY 1998 and dilutive by 0.6% in FY
1999, 2.5% in FY 2000 and 3.9% in FY 2001 based on Tyco's Base Case and ADT's
Base Case, (ii) accretive by 5.2% in FY 1997, 6.3% in FY 1998, 5.5% in FY 1999,
5.9% in FY 2000 and 6.8% in FY 2001 based on Tyco's Base Case and ADT's
Sensitivity Case, (iii) accretive by 1.4% in 1997 and dilutive by 3.0% in FY
1998, 7.1% in FY 1999, 8.2% in FY 2000 and 9.6% in FY 2001 based on Tyco's
Sensitivity Case and ADT's Base Case and (iv) accretive by 2.8% in FY 1997 and
0.6% in FY 1998 and dilutive by 1.6% in FY 1999 and 0.6% in FY 2000 and
accretive by 0.1% in FY 2001 based on Tyco's Sensitivity Case and ADT's
Sensitivity Case.  Based on the Low Synergy Case, from ADT's perspective, the
pro forma impact on ADT's estimated EPS would be (i) accretive by 2.3% in FY
1997 and dilutive by 0.2% in FY 1998, 3.7% in FY 1999, 5.1% in FY 2000 and
6.2% in FY 2001 based on Tyco's Base Case and ADT's Base Case, (ii) accretive
by 3.8% in FY 1997, 3.6% in FY 1998, 2.1% in FY 1999, 3.0% in FY 2000 and 4.2%
in FY 2001 based on Tyco's Base Case and ADT's Sensitivity Case, (iii) nil in
FY 1997, and dilutive by 5.5% in FY 1998, 10.1% in FY 1999, 10.8% in FY 2000
and 11.8% in FY 2001 based on Tyco's Sensitivity Case and ADT's Base Case and
(iv) accretive by 1.4% in FY 1997 and dilutive by 2.0% in FY 1998, 4.9% in FY
1999, 3.5% in FY 2000 and 2.5% in FY 2001 based on Tyco's Sensitivity Case and
ADT's Sensitivity Case.
    

               The preparation of a fairness opinion is a complex process and
is not necessarily susceptible to partial analysis or summary description.
Merrill Lynch believes that its analyses must be considered as a whole and
that selecting portions of its analyses and the factors considered by it,
without considering all factors and analyses, could create an incomplete view
of the process underlying its opinion.  Merrill Lynch considered the results
of all such analyses and did not assign relative weights to its analyses in
preparing its opinion.  Consequently, the ranges of valuations resulting from
any particular analysis described above should not be taken to be Merrill
Lynch's view of the actual value of ADT.

               In performing its analyses, Merrill Lynch made numerous
assumptions with respect to industry performance, general business and
economic conditions and other matters, many of which are beyond the control of
ADT and/or Tyco.  The analysis performed by Merrill Lynch is not necessarily
indicative of actual values, trading values or actual future results that
might be achieved, all of which may be significantly more or less favorable
than suggested by such analysis.  No public company utilized as a comparison
is identical to ADT or Tyco, and none of the Selected Acquisitions or other
business combinations utilized as a comparison is identical to the
transactions contemplated by the Merger Agreement.  Accordingly, an analysis
of publicly traded comparable companies and comparable business combinations
resulting from the transactions is not mathematical; rather it involves
complex considerations and judgments concerning differences in financial and
operating characteristics of the comparable companies or the company or
transaction to which they are being compared.  In connection with its
analyses, Merrill Lynch utilized, with ADT's consent, estimates and forecasts
of future results provided by the respective managements of ADT and Tyco.
Analyses based upon forecasts of future results are not necessarily indicative
of actual future results, which may be significantly more or less favorable
than suggested by such analyses.  Because such analyses are inherently subject
to uncertainty, being based upon numerous factors or events beyond the control
of ADT, Tyco and/or Merrill Lynch, none of ADT, Tyco and Merrill Lynch assume
responsibility if future results or actual values are materially different
from these forecasts or assumptions.  The analyses described above were
prepared solely as part of Merrill Lynch's analysis of the fairness of the
Exchange Ratio and were provided to the ADT Board.  Merrill Lynch's analyses
do not purport to be appraisals or to reflect the prices at which a company
might  described above, the Merrill Lynch Opinion was one of many factors
taken into consideration by the ADT Board in making its determination to
approve the Merger.  Consequently, the analyses described above should not be
viewed as determinative of the opinion of either the ADT Board or ADT
management with respect to the value of ADT or a combination of ADT with Tyco
or whether either the ADT Board or ADT management would have been willing to
agree to a different exchange ratio.  The ADT Board placed no limits on the
scope of analysis performed, or opinions expressed, by Merrill Lynch.

               Pursuant to the terms of an engagement letter dated March 17,
1997 (the "March 17 Engagement Letter"), ADT has agreed to pay Merrill Lynch
(i) a fee of $2,000,000 upon signing the engagement letter and (ii) if the
Merger or a similar combination involving ADT and Tyco is consummated during
the period of Merrill Lynch's engagement under the March 17 Engagement Letter
or within one year thereafter, an additional fee of $10,000,000 with respect
to Merrill Lynch acting as financial advisor to ADT in connection with the
Merger.  In addition, ADT also agreed to reimburse Merrill Lynch for its
reasonable out-of-pocket expenses, including all reasonable fees and expenses
of its attorneys, and to indemnify Merrill Lynch and certain related persons
against certain liabilities, including liabilities under securities laws,
arising out of its engagement pursuant to the March 17 Engagement Letter.
Merrill Lynch and ADT further agreed that the fees payable to Merrill Lynch
pursuant to the March 17 Engagement Letter would offset all fees payable, and
be offset by all fees previously paid, to Merrill Lynch under a separate
engagement letter dated March 3, 1997, pursuant to which Merrill Lynch had
been retained by ADT as its financial advisor with respect to the Western
Offer.

               Merrill Lynch has, in the past, provided, and continues to
provide, financial advisory and financing services to ADT and has received,
and continues to receive, customary fees for the rendering of those services.
In addition, in the ordinary course of Merrill Lynch's securities business,
Merrill Lynch may actively trade debt and/or equity securities of ADT and its
affiliates for its own account and the accounts of its customers, and Merrill
Lynch therefore may from time to time hold a long or short position in such
securities.

               Merrill Lynch has, in the past, provided, and continues to
provide, financial advisory and financing services to Tyco, including acting
as lead managing underwriter with respect to the February 1997 Offering and
has received customary fees for the rendering of those services.  In addition,
in the ordinary course of Merrill Lynch's securities business, Merrill Lynch
may actively trade debt and/or equity securities of Tyco and its affiliates
for its own account and the accounts of its customers, and Merrill Lynch
therefore may from time to time hold a long or short position in such
securities.



                  INTERESTS OF CERTAIN PERSONS IN THE MERGER

               Certain members of Tyco management and of the Tyco Board may be
deemed to have interests in the Merger that are different from, or in addition
to, the interests of Tyco shareholders generally.  The Tyco Board was aware of
these interests and considered them, among other matters, in approving the
Merger Agreement and the transactions contemplated thereby.  In addition,
certain members of ADT management and of the ADT Board may be deemed to have
interests in the Merger that are different from, or in addition to, the
interests of ADT shareholders generally.  The ADT Board was aware of these
interests and considered them, among other matters, in approving the Merger
Agreement and the transactions contemplated thereby.  These interests are
described below.

Tyco and ADT Directors and Officers Insurance; Indemnification of Tyco and ADT
Directors and Officers

   
      The Merger Agreement provides that the Surviving Corporation will
indemnify each present and former director and officer of Tyco and its
subsidiaries against all liabilities arising out of the transactions
contemplated by the Merger Agreement and for any act or omission occurring
prior to the Effective Time to the same extent as these directors and officers
were indemnified by Tyco.  The Surviving Corporation is prohibited from
amending its by-law provisions with respect to indemnification in a manner
adverse to the officers, directors, employees and agents of Tyco at the
Effective Time and is required to maintain director and officer insurance for
the persons currently covered by Tyco's director and officer insurance policy
with coverage comparable to such policy, subject to certain limitations.
These obligations continue for a period of six years from the Effective Time
and are guaranteed by the Combined Company.  The Combined Company is required
to provide similar indemnification, similarly to maintain its bye-law
provisions with respect to indemnification and similarly to provide director
and officer insurance with respect to officers and directors of ADT for a
period of six years from the Effective Time.  See "The Merger
Agreement--Certain Covenants--Indemnification and Insurance of Tyco and ADT
Directors and Officers."
    

ADT Employment Agreements and Other Arrangements

   
               Michael A. Ashcroft, Chairman, Chief Executive Officer and
President of ADT, is party to an employment agreement with ADT.  Under this
employment agreement, if Mr. Ashcroft's employment is terminated by ADT
without cause or by Mr. Ashcroft for cause, Mr. Ashcroft is entitled to
receive a severance payment equal to two times his highest base salary and
average bonus payment, annual pension payments for the year of termination and
the following two years, and one year of any other benefits previously
provided.  The Combined Company will not continue to employ Mr. Ashcroft as
Chairman, Chief Executive Officer and President, and, accordingly, since Mr.
Ashcroft will no longer be Chairman and Chief Executive Officer, he will be
entitled to receive such severance benefits under his employment agreement.
Stephen J. Ruzika, Executive Vice President, Chief Financial Officer and a
Director of ADT, is party to an employment agreement with ADT.  Under this
employment agreement, if Mr. Ruzika's employment is terminated by ADT without
cause or by Mr. Ruzika for cause, Mr. Ruzika is entitled to receive a severance
payment equal to twice his base salary, bonus and certain fringe benefits.
The Combined Company will not continue to employ Mr. Ruzika as Chief Financial
Officer, but Mr. Ruzika is expected to continue to have responsibility for the
electronic security services operations of the Combined Company. Because Mr.
Ruzika will no longer be Chief Financial Officer of ADT, Mr. Ruzika will be
entitled to terminate his employment and receive severance benefits under his
employment agreement. Under a bonus plan with the Company, Mr. Ruzika is
entitled to receive $200,000 each time the ADT Common Share price exceeds by
$1.00 for a continuous period of 30 trading days, the share price level at
which a bonus payment was previously made, until the ADT Common Share price
exceeds $30.00 for 30 continuous trading days.  If the ADT Common Share price
exceeds $30.00 in or prior to May 1999, Mr. Ruzika is entitled tl payment of
$1,000,000.  Prior to the announcement of the Merger, Mr. Ruzika earned a
bonus at an ADT Common Share price level of $22.00.  On March 16, 1997, the
last trading day prior to the announcement of the Merger, the closing ADT
Common Share price on the NYSE was $21 3/4.  See "Comparative Per Share Market
Price and Dividend Information." The price of ADT Common Shares has been,
and may continue to be, affected by the announcement of the Merger and may
be affected by consummation of the Merger, which may result in payments to
Mr.  Ruzika under the bonus plan in amounts or at times that he might not
otherwise have received such payments.

               Mr. Ruzika is also a beneficiary under the ADT supplemental
employee retirement plan (the "ADT SERP") and the Supplemental Benefit
Agreement between Mr. Ruzika and ADT Management Services Limited (the
"Supplemental Benefit Agreement").  Ronnie G. Lakey, a director of ADT (UK)
Holdings PLC with responsibility for ADT's electronic security service
operations in Canada and Europe, is a beneficiary under the ADT SERP.
Pursuant to the ADT SERP and the Supplemental Benefit Agreement, Messrs.
Ruzika and Lakey become fully vested in their benefits under these plans upon
the occurrence of a change of control of ADT or, in Mr. Ruzika's case, a
change of control of ADT Management Services Limited, a subsidiary of ADT.  In
addition, if Mr. Ruzika or Mr. Lakey is terminated within one year of the date
of such a change in control, he will be entitled to receive a lump sum
distribution equal to the present value of his accrued benefit under the plans
and an additional amount calculated to place him in the same after-tax
position as he would have been in had he received a lump-sum distribution of
his accrued benefits on his normal retirement date.

               Raymond A. Gross, Senior Vice President of ADT Security
Services, Inc. ("ADT Security"), a subsidiary of ADT, has entered into a
severance agreement with ADT Security Services, Inc.  Under this agreement, if
a change in control occurs and either Mr. Gross is terminated without cause or
he terminates his employment for good reason, he will be entitled to receive
(a) severance pay equal to twice his annual base salary, as of the date of the
change in control or the date of termination, whichever is higher, plus twice
the amount of his bonus in the year prior to termination and (b) benefits for
the twelve months following termination substantially similar to those which
he is receiving as of the date of the change in control or the date of
termination, whichever is higher.

               The Merger Agreement provides that the Merger will be deemed a
change in control for purposes of the ADT SERP, the Supplemental Benefit
Agreement and Mr. Gross's severance agreement, unless to do so would
reasonably be expected to adversely affect the ability to treat the Merger as
a pooling of interests for financial accounting.  Tyco and ADT do not believe
that deeming the Merger a change in control for these purposes will have such
an effect.

               For a more detailed discussion of the employment agreements and
other arrangements discussed in this section, see "Election of
Directors--Executive Compensation--Employment Contracts, Termination of
Employment and Change in Control Arrangements."
    






                           THE MERGER AGREEMENT

               The Merger Agreement is summarized below.  The full text of the
Merger Agreement is attached as Annex I, and this summary is qualified by
reference to that full text.

General

               The Merger Agreement provides for the merger of Merger
Subsidiary with and into Tyco, with Tyco surviving the Merger as a
wholly-owned subsidiary of ADT.  The Combined Company will be renamed Tyco
International Ltd.  The Merger will become effective at the Effective Time,
which is expected to occur no later than the second business day after the
last of the conditions precedent to the Merger set forth in the Merger
Agreement has been satisfied or waived, unless Tyco and ADT agree upon a
different date.

Merger Consideration

   
               The Merger Agreement provides that each Tyco Common Share
outstanding immediately prior to the Effective Time (excluding any shares to
be canceled as described in the next sentence and shares in respect of which
the holder has exercised dissenters' rights in compliance with applicable law)
will be converted at the Effective Time, subject to the prior effectiveness of
the Reverse Stock Split, into the right to receive and will be exchanged for
one fully paid and non-assessable Combined Company Common Share.  All Tyco
Common Shares that are owned by Tyco as treasury stock and any Tyco Common
Shares owned by ADT or any direct or indirect wholly-owned subsidiary of ADT
will, at the Effective Time, be canceled and retired and will cease to exist
and no payment will be made for such shares.

               The existing ADT Common Shares will remain outstanding.
However, immediately prior to (but conditioned upon the occurrence of) the
Effective Time, each ADT Common Share then outstanding will be consolidated in
the  Reverse Stock Split Ratio of 0.48133 of a Combined Company Common Share,
par value $.20 per share, for each ADT Common Share, par value $.10 per share.
See subsection (xiii) under "Termination of the Merger Agreement--Right to
Terminate" for a description of the circumstances under which the Reverse
Stock Split Ratio may be adjusted. Cash will be paid to holders of ADT Common
Shares in lieu of fractional entitlements to Combined Company Common Shares
arising from the Reverse Stock Split.
    

Treatment of Tyco Stock Options

   
               Pursuant to the Merger Agreement, each outstanding option (a
"Tyco Stock Option") granted by Tyco to purchase shares of Tyco Common Shares
under the Tyco 1995 Stock Option Plan (the "Tyco Option Plan") or any other
stock plan or agreement of Tyco (collectively, the "Tyco Plans"), whether
vested or unvested, will be assumed by the Combined Company and will be deemed
to constitute an option to acquire, on the same terms and conditions as were
applicable under that Tyco Stock Option, the same number of Combined Company
Common Shares as the holder of such Tyco Stock Option would have been entitled
to receive pursuant to the Merger if that holder had exercised such Tyco Stock
Option in full immediately prior to the Effective Time, at a price per
Combined Company Common Share equal to (A) the aggregate exercise price for
the Tyco Common Shares otherwise purchasable pursuant to such Tyco Stock
Option divided by (B) the aggregate number of Combined Company Common Shares
deemed purchasable pursuant to such Tyco Stock Option; provided that the
number of Combined Company Common Shares that may be purchased upon exercise
of any such Tyco Stock Option shall not include any fractional share and, upon
exercise of such Tyco Stock Option, a cash payment shall be made for any
fractional Combined Company Common Shares resulting from this calculation
based upon the closing price of the Combined Company Common Shares on the
trading day immediately preceding the date of exercise.  There are presently
outstanding options to acquire 3,844,479 Tyco Common Shares issued under the
Tyco Option Plan, and options to acquire 279,170 Tyco Common Shares issued by
entities previously acquired by Tyco whose stock options were assumed by Tyco.
See "The Option and Warrant Proposal--Tyco Stock Options and Other Rights."
    

Treatment of Tyco Warrants

   
               At the Effective Time, each Warrant expiring July 7, 1999 to
purchase 2.5897 Tyco Common Shares at a purchase price of $15.46, subject to
adjustment (an "A Warrant"), and each Warrant expiring July 7, 1999 to
purchase 2.5897 Tyco Common Shares at a purchase price of $20.62, subject to
adjustment (a "B Warrant" and, together with the A Warrants, the "Warrants"),
shall be assumed by the Combined Company and deemed to constitute a warrant to
acquire, on the same terms and conditions as were applicable under such Warrant
prior to the Effective Time, the same number (rounded to the nearest whole
number) of Combined Company Common Shares as the holder of such Warrant would
have been entitled to receive pursuant to the Merger if such holder had
exercised such Warrant in full immediately prior to the Effective Time, at a
price per share equal to (A) the aggregate exercise price of Tyco Common
Shares otherwise purchasable pursuant to the Warrant divided by (B) the number
of Combined Company Common Shares deemed purchasable pursuant to such Warrant.
There are currently outstanding A Warrants to acquire 127,568 Tyco Common
Shares and B Warrants to acquire 83,282 Tyco Common Shares.  See "The Option
and Warrant Proposal--Tyco Stock Options and Other Rights."
    

Tyco Restricted Stock Plan
   

               The Combined Company is required to assume Tyco's 1994
Restricted Stock Plan for Key Employees (the "1994 Restricted Stock Plan") and
to reserve for issuance under this plan a number of Combined Company Common
Shares equal to the number of Tyco Common Shares reserved for issuance under
the plan immediately prior to the Effective Time multiplied by the Exchange
Ratio.
    

Exchange of Shares

               Prior to the Effective Time, Tyco and ADT will jointly appoint
an exchange agent (the "Exchange Agent") for the purpose of exchanging
certificates representing Tyco Common Shares for certificates representing
Combined Company Common Shares.  Promptly after the Effective Time, ADT will
instruct the Exchange Agent to mail to each holder of Tyco Common Shares a
letter of transmittal for use in the exchange and instructions explaining how
to surrender certificates to the Exchange Agent.  Holders of Tyco Common
Shares who surrender their certificates to the Exchange Agent, together with a
properly completed letter of transmittal, will receive certificates for
Combined Company Common Shares representing the number of shares described
under "--Merger Consideration."  Holders of unexchanged Tyco Common Shares
will not be entitled to receive any dividends or other distributions payable
by the Combined Company after the Effective Time until their certificates are
surrendered.  Upon surrender, however, subject to applicable laws, such
holders will receive accumulated dividends and distributions payable on the
related Combined Company Common Shares subsequent to the Effective Time,
without interest.

Certain Covenants
   

               Interim Operations of ADT.  From March 17, 1997 until the
Effective Time, ADT is required to conduct its business, and to cause the
businesses of its subsidiaries to be conducted, in the ordinary course of
business and in a manner consistent with past practice, and ADT will use
reasonable commercial efforts to preserve substantially intact the business
organizations of ADT and its subsidiaries, to keep available the services of
their present officers, employees and consultants and to preserve their
present relationships with customers, suppliers and other persons with which
they have significant business relationships.  Without limiting the foregoing,
during this period, each of ADT and its subsidiaries is subject to
restrictions (subject to certain limited exceptions) on, among other things:
(i) amending the ADT memorandum of association (the "ADT Memorandum") or the
ADT Bye-Laws; (ii) issuing, selling, pledging, disposing of or encumbering, or
authorizing the issuance, sale, pledge, disposition or encumbrance of, any
shares of capital stock of any class, or any options, convertible securities
or other rights of any kind to acquire any shares of capital stock, or any
other ownership interest, in ADT or any of its subsidiaries or affiliates
(except for the issuance of options in the ordinary course of business and
consistent with past practice to purchase up to an aggregate of 1 million ADT
Common Shares (other than to ADT's chief executive officer or chief financial
officer)); (iii) selling, pledging, disposing of or encumbering any assets;
(iv) declaring, setting aside, making or paying any dividend or other
distribution (whether in cash, stock or property or any combination thereof)
in respect of its capital stock (except for certain intercompany dividends),
splitting, combining or reclassifying any of its capital stock, proposing to
issue any other securities in respect thereof, or amending the terms or
changing the period of exercisability of, purchasing, repurchasing, redeeming
or otherwise acquiring any of its securities; (v) acquiring any corporation,
partnership or other business organization or division thereof, incurring any
indebtedness for borrowed money or issuing any debt securities or guarantees
except in the ordinary course of business consistent with past practice,
authorizing any capital expenditures other than certain agreed expenditures and
any capital expenditures incurred in connection with the installation of
subscriber systems in the ordinary course of business; (vi) increasing the
compensation payable to its officers or employees, or granting any severance
pay to, or entering into any employment or severance agreement with any
director, officer or other employee or amending any collective bargaining or
compensation plan or arrangement for the benefit of any current or former
directors, officers or employees; (vii) changing its accounting pong any
material tax election inconsistent with past practice; (ix) paying or
satisfying any material claims, liabilities or obligations other than in the
ordinary course of business; or (x) taking any other action that would make
any representation or warranty of ADT contained in the Merger Agreement
incorrect or prevent ADT or Merger Subsidiary from performing its covenants
under the Merger Agreement.

               Interim Operations of Tyco.  From March 17, 1997 until the
Effective Time, Tyco is required to conduct its business, and cause the
businesses of its subsidiaries to be conducted, in the ordinary course of
business and in a manner consistent with past practice. Without limiting the
foregoing, during this period, Tyco has agreed that it will not, among other
things: (i) amend the articles of organization of Tyco (the "Tyco Articles")
or the Tyco Bylaws ("Tyco Bylaws"); (ii) acquire or agree to acquire any
business or any corporation or other business organization or division
thereof, or otherwise acquire or agree to acquire any assets of any other
person which would materially delay or prevent the consummation of the
transactions contemplated by the Merger Agreement; (iii) declare, set aside,
make or pay any dividend or other distribution (in cash, stock, property or
any combination thereof) on its capital stock, except that Tyco may declare
and pay cash dividends of $0.05 per Tyco Common Share per quarter consistent
with past practice and except for certain intercompany dividends; or (iv) take
or agree to take any action which would make any of the representations or
warranties of Tyco in the Merger Agreement untrue or incorrect or prevent Tyco
from performing its covenants under the Merger Agreement.

               No Solicitation by ADT.  ADT has agreed in the Merger Agreement
that it will not, directly or indirectly, through any officer, director,
employee, representative or agent, solicit or encourage the initiation of any
inquiries or proposals regarding any merger, or any acquisition of any capital
stock or any material portion of the assets of ADT or similar transactions
involving ADT or any subsidiaries of ADT (any of the foregoing inquiries or
proposals being referred to as an "Acquisition Proposal").  However, this
covenant will not prevent the ADT Board from (i) considering, negotiating,
approving and recommending to the shareholders of ADT a bona fide Acquisition
Proposal not solicited in violation of the Merger Agreement, (ii) taking and
disclosing to its shareholders a position contemplated by Rule 14e-2 under the
Exchange Act or (iii) making any disclosure to its shareholders, provided that
as to each of clauses (i), (ii) and (iii), the ADT Board determines in good
faith (upon advice of independent counsel) that such action is necessary for
it to act in a manner consistent with its fiduciary duties under applicable
law.  If, in accordance with these requirements, the ADT Board determines that
it is required to furnish material nonpublic information to a person who makes
a bona fide Acquisition Proposal, ADT may provide such person with access to
information regarding ADT so long as such person has executed a
confidentiality agreement substantially similar to the one then in effect
between Tyco and ADT.  ADT must notify Tyco promptly of the receipt of any
Acquisition Proposal or any request for  nonpublic information relating to ADT
or any of its subsidiaries or for access to the properties, books or records
of ADT or any subsidiary of ADT by any person that informs the ADT Board or
such subsidiary that it is considering making, or has made, an Acquisition
Proposal.   ADT has agreed to immediately cease and cause to be terminated any
existing discussions or negotiations with any persons other than Tyco with
respect to any Acquisition Proposal and that it will not release any third
party from the confidentiality provisions of any confidentiality agreement to
which ADT is a party in respect of any information delivered by ADT in
connection with any Acquisition Proposal.
    

               No Solicitation by Tyco.  Tyco has agreed in the Merger
Agreement that it will not, directly or indirectly, through any officer,
director, employee, representative or agent, solicit or encourage the
initiation of any inquiries or proposals regarding any Change of Control
Proposal (as defined below).  However, this covenant will not prevent the Tyco
Board  from (i) considering, negotiating, approving and recommending to the
shareholders of Tyco a bona fide Change of Control Proposal not solicited in
violation of the Merger Agreement, (ii) taking and disclosing to its
shareholders a position contemplated by Rule 14e-2 under the Exchange Act or
(iii) making any disclosure to its shareholders, provided that as to each of
clauses (i), (ii) and (iii), the Tyco Board determines in good faith (upon
advice of independent counsel) that such action is necessary for it to act in
a manner consistent with its fiduciary duties under applicable law.  If in
accordance with these requirements, the Tyco Board determines that it is
required to furnish material nonpublic information to a person who makes a
bona fide Change of Control Proposal, Tyco may provide such person with access
to information regarding Tyco so long as such person has executed a
confidentiality agreement substantially similar to the one then in effect
between ADT and Tyco.  Tyco must notify ADT promptly of the receipt of any
Change of Control Proposal or any request for  nonpublic information relating
to Tyco or any of its subsidiaries or for access to the properties, books or
records of Tyco or any subsidiary of Tyco by any person that informs the Tyco
Board or such subsidiary that it is considering making, or has made, a Change
of Control Proposal.  "Change of Control Proposal" means (x) any merger or any
acquisition of any capital stock of Tyco or similar transactions involving
Tyco as a result of which the shareholders of Tyco immediately prior to the
consummation of such transaction would own less than 50% of the voting stock
of Tyco or, if Tyco is not the surviving corporation, the surviving
corporation, immediately following the consummation of such transaction or (y)
the sale of all or substantially all of the assets of Tyco.

   
               ADT's Covenant to Recommend.  ADT has agreed to call the ADT
Meeting as promptly as practicable and to use its reasonable best efforts to
hold the ADT Meeting as soon as practicable after the date of this Joint Proxy
Statement/ Prospectus.  Unless otherwise required under the applicable
fiduciary duties of the directors of ADT, as determined by such directors in
good faith after consultation with and based upon the advice of independent
legal counsel, ADT has agreed to solicit from its shareholders proxies in
favor of the ADT Merger Proposals, and to take all other actions necessary or
advisable to secure the vote or consent of its shareholders to obtain such
approvals.  The ADT Board is not permitted to withdraw or modify, in a manner
adverse to Tyco, its approval or recommendation of the ADT Merger Proposals
approve or recommend any Acquisition Proposal or cause ADT to enter into any
agreement with respect to any Acquisition Proposal except upon the advice of
independent counsel that such action is required in order for the ADT Board to
act in a manner consistent with its fiduciary duties and, with respect to the
approval or recommendation of any Acquisition Proposal or entering into any
agreement with respect to any Acquisition Proposal, after the third business
day (or second business day in the case of an amendment to an Acquisition
Proposal) following Tyco's receipt of written notice of the information with
respect to the Acquisition Proposal that is required by the Merger Agreement.
    

               Tyco's Covenant to Recommend.  Tyco has agreed to call the Tyco
Meeting as promptly as practicable and to use its reasonable best efforts to
hold the Tyco Meeting as soon as practicable after the date of this Joint
Proxy Statement/Prospectus.   Unless otherwise required under the applicable
fiduciary duties of the directors of Tyco, as determined by such directors in
good faith after consultation with and based upon the advice of independent
legal counsel, Tyco has agreed to solicit from its shareholders proxies in
favor of adoption of the Merger Agreement and approval of the transactions
contemplated thereby, and to take all other actions necessary or advisable to
secure the vote or consent of its shareholders to obtain such approvals.  The
Tyco Board is not permitted to withdraw or modify, in a manner adverse to ADT,
its approval or recommendation of the Merger Agreement, the Merger or any of
the other transactions contemplated by the Merger Agreement, approve or
recommend any Change of Control Proposal or cause Tyco to enter into any
agreement with respect to any Change of Control Proposal except upon the
advice of independent counsel that such action is required in order for the
Tyco Board to act in a manner consistent with its fiduciary duties and, with
respect to the approval or recommendation of any Change of Control Proposal or
entering into any agreement with respect to any Change of Control Proposal,
after the third business day (or second business day in the case of an
amendment to a Change of Control Proposal) following ADT's receipt of written
notice of the information with respect to the Change of Control Proposal that
is required by the Merger Agreement.

   
               Certain Employee Benefits Matters. The Merger Agreement
provides that Tyco will take all action as may be required under the Tyco
Plans, such that, following the Effective Time, each of the Tyco Stock Options
will be treated as described above under "--Treatment of Tyco Stock Options."
Tyco and ADT have agreed that all outstanding ADT stock options (other than
stock options granted after March 17, 1997) shall be fully exercisable at the
Effective Time and that consummation of the Merger Agreement shall constitute
a "change of control" of ADT for purposes of the severance and other similar
agreements which contain "change of control" provisions.  However, the actions
in the preceding sentence shall not be effected if any such transaction would
reasonably be expected to affect adversely the ability of ADT to account for
the Merger as a pooling of interests.  Subsequent to the date of the Merger
Agreement, Tyco and ADT have reached an agreement that all outstanding ADT
stock options shall not become exercisable at the Effective Time.
    

               ADT Shareholder Rights Plan.  Prior to the Effective Time, at
the election of Tyco communicated to ADT not less than 15 business days prior
to the ADT Meeting, ADT has agreed to take such action as shall be required to
either (i) amend the ADT Shareholder Rights Plan to provide that no
Distribution Date (as defined in the ADT Shareholder Rights Plan) shall occur
and no person shall become an Acquiring Person (as defined in the ADT
Shareholder Rights Plan) by reason of the consummation of the Merger or the
transactions contemplated by the Merger Agreement or (ii) redeem or otherwise
terminate all Rights, such that all Rights shall be of no further force and
effect.  If Tyco does not communicate any such election to ADT, Tyco will be
deemed to have made the election described in clause (i) of the preceding
sentence.

   
               Indemnification and Insurance of Tyco and ADT Directors and
Officers.  Pursuant to the Merger Agreement, the parties have agreed that for
a period of six years from the Effective Time:  (i) the by-laws of the
Surviving Corporation with respect to indemnification shall not be amended,
repealed or otherwise modified in any way adverse to the rights of individuals
who at the Effective Time were directors, officers, employees or agents of
Tyco or any of its subsidiaries; (ii) the Surviving Corporation shall
indemnify and hold harmless each present and former director or officer of
Tyco or any of its subsidiaries against costs, expenses, claims and
liabilities arising out of the transactions contemplated by the Merger
Agreement or with respect to any acts or omissions occurring at or prior to
the Effective Time to the same extent as provided in the Tyco Articles (as in
effect as of the date of the Merger Agreement) or the Tyco Bylaws (as in
effect as of the date of the Merger Agreement) or any applicable contract or
agreement (as in effect as of the date of the Merger Agreement); (iii) ADT
shall cause the Surviving Corporation to maintain in effect, if available,
directors' and officers' liability insurance covering those persons currently
covered by Tyco's directors' and officers' liability insurance policy on terms
comparable to those now applicable to directors and officers of Tyco or its
subsidiaries, provided that if the cost of such insurance exceeds 200% of the
annual premium currently paid by Tyco for such coverage, the Combined Company
or the Surviving Corporation shall only be required to purchase a policy with
the greatest coverage available for such 200% of the annual premium and (iv)
from and after the Effective Time, the Combined Company shall guarantee the
obligations of the Surviving Corporation as provided in this sentence.  In
addition, the Merger Agreement provides that for a period of six years from
the Effective Time:  (a) the ADT Bye-Laws which contain the provisions with
respect to indemnification shall not be amended, repealed or otherwise
modified in any way adverse to the rights of individuals who at the Effective
Time were directors, officers, employees or agents of ADT or any of its
subsidiaries; (b) ADT shall indemnify and hold harmless each present and
former director or officer of ADT or any of its subsidiaries against costs,
expenses, claims and liabilities arising out of the transactions contemplated
by the Merger Agreement or with respect to any acts or omissions occurring at
or prior to the Effective Time to the same extent as provided in the ADT
Memorandum (as in effect as of the date of the Merger Agreement) or the ADT
Bye-Laws (as in effect as of the date of the Merger Agreement) or any
applicable contract or agreement (as in effect as of the date of the Merger
Agreement); and (c) the Combined Company shall maintain in effect, if
available, directors' and officers' liability insurance covering those persons
currently covered by ADT's directors' and officers' liability insurance policy
on terms comparable to those now applicable to directors and officers of ADT
or its subsidiaries, provided that if the cost of such insurance exceeds 200%
of the annual premium currently paid by ADT for such coverage, the Combined
Company or the Surviving Corporation shall only be required to purchase a
policy with the greatest coverage available for such 200% of the annual
premium.
    

               Certain Other Covenants.  The Merger Agreement contains certain
mutual covenants of the parties, including covenants:  to use all reasonable
efforts to take all actions necessary or advisable to consummate the
transactions contemplated by the Merger Agreement, to make all necessary
registrations and filings and to satisfy all conditions precedent to their
obligations under the Merger Agreement; to use their best efforts to cause
their respective accountants to deliver to the other party a customary
accountant's "comfort letter"; not to take any action that would reasonably be
expected to adversely the ability of the Combined Company to account for the
business combination to be effected by the Merger as a pooling of interests;
and, subject to certain exceptions, to consult with each other before issuing
any press release with respect to the Merger or the Merger Agreement and not
to issue any such press release or make any public statement without the prior
written consent of the other party, which shall not be unreasonably withheld.
In addition, the Merger Agreement contains covenants relating to preparation
and distribution of this Joint Proxy Statement/Prospectus; listing of the
Combined Company Common Shares on the NYSE; notification of certain matters;
access to information; and co-operation in connection with certain
governmental filings and in obtaining any necessary governmental or other
third party consents or approvals.

Certain Representations and Warranties

   
               The Merger Agreement contains substantially reciprocal
representations and warranties made by Tyco and ADT to each other as to, among
other things:  organization and qualification; capitalization; ownership of
subsidiaries; corporate authorization to enter into the contemplated
transactions; absence of any breach of organizational documents and certain
material agreements as a result of the contemplated transactions; compliance
with law; financial statements; filings with the SEC; absence of certain
material changes since a specified balance sheet date; absence of undisclosed
material liabilities; litigation; employee matters; labor matters; disclosure
in filings with the SEC; restrictions on business activities; title to
property and real property matters; tax matters; environmental matters;
intellectual property;  interested party transactions; insurance; product
liability and recalls; the receipt of opinions of financial advisors; pooling
of interests accounting treatment for the Merger; and brokers and broker fees.
The representations and warranties in the Merger Agreement do not survive the
Effective Time.
    

Conditions to the Merger

               Conditions to Each Party's Obligations to Effect the Merger.
The obligations of Tyco, ADT and Merger Subsidiary to effect the Merger are
subject to the satisfaction (or waiver by the party for whose benefit the
applicable condition exists) at or prior to the Effective Time of the
following conditions:  (i) the effectiveness of the registration statement on
Form S-4 filed in connection with this Joint Proxy Statement/Prospectus and the
absence of any stop order suspending such effectiveness or proceedings for
that purpose; (ii) the obtaining of approvals of the shareholders of ADT and
Tyco; (iii) all actions having been taken such that the Reverse Stock Split
and the Share Amendment will become effective immediately prior to (but
conditioned upon the occurrence of) the Effective Time;  (iv) the Combined
Company Common Shares to be issued in the Merger having been authorized for
listing on the NYSE, subject to official notice of issuance; (v) the
expiration or termination of the applicable waiting periods under the HSR Act;
(vi) the absence of any pending or threatened action or proceeding (or any
investigation or other inquiry that might result in such an action or
proceeding) by any governmental authority or administrative agency before any
governmental authority, administrative agency or court of competent
jurisdiction, domestic or foreign, and the absence of any judgment, decree or
order of any governmental authority, administrative agency or court or any
other legal restraint (A) preventing or seeking to prevent consummation of the
Merger or the effectiveness of the Reverse Stock Split, the Share Amendment or
the New  Director Election, (B) prohibiting or seeking to prohibit, or
limiting or seeking to limit, the Combined Company from exercising all
material rights and privileges pertaining to its ownership of the Surviving
Corporation or the ownership or operation by the Combined Company or any of
its subsidiaries of all or a material portion of the business or assets of the
Combined Company or any of its subsidiaries, or (C) compelling or seeking to
compel the Combined Company or any of its subsidiaries to dispose of or hold
separate all or any material portion of the business or assets of the Combined
Company or any of its subsidiaries (including the Surviving Corporation and
its subsidiaries), in each case as a result of the Merger or the transactiony
the Merger Agreement, (vii) the absence of the enactment, entering,
enforcement or deemed applicability to the Merger of any statute, rule,
regulation or order which would make the consummation of the Merger or the
effectiveness of the Reverse Stock Split, the Share Amendment or the New
Directors Election illegal; and (viii) the receipt of written opinions of
Coopers & Lybrand L.L.P. and Coopers & Lybrand, in form and substance
satisfactory to Tyco and ADT, that the Merger will qualify for accounting
treatment as a pooling of interests.

               Conditions to the Obligations of Tyco.  The obligation of Tyco
to effect the Merger is further subject to all of the following conditions:
(i) the representations and warranties of ADT and Merger Subsidiary contained
in the Merger Agreement being true and correct in all material respects at and
as of the Effective Time (except for changes contemplated by the Merger
Agreement and those representations and warranties which address matters only
as of a particular date (which shall have been true and correct as of such
date)), (ii) the performance in all material respects by ADT and Merger
Subsidiary of their agreements and covenants required by the Merger Agreement
to be performed by them on or prior to the Effective Time; (iii) all material
consents, authorizations or orders required to be obtained, and all filings
required to be made, by ADT and Merger Subsidiary  for the authorization,
execution and delivery of the Merger Agreement and the consummation by them of
the transactions contemplated thereby having been obtained and made by ADT and
Merger Subsidiary;  (iv) Tyco having received an agreement in connection with
restrictions on affiliates under pooling of interests accounting treatment
from each "affiliate" of ADT; and (v) the ADT Shareholder Rights Plan having
been amended or the Rights having been redeemed or otherwise terminated as
provided in the Merger Agreement.

   
               Conditions to the Obligations of ADT.  The obligations of ADT
and Merger Subsidiary to effect the Merger are further subject to all of the
following conditions:  (i) the representations and warranties of Tyco
contained in the Merger Agreement being true and correct in all material
respects at and as of the Effective Time (except for changes contemplated by
the Merger Agreement and those representations and warranties which address
matters only as of a particular date (which shall have been true and correct
as of that date)), (ii) the performance in all material respects by Tyco of
its agreements and covenants required by the Merger Agreement to be performed
by it on or prior to the Effective Time; (iii) all material consents,
authorizations or orders required to be obtained, and all filings required to
be made, by Tyco for the authorization, execution and delivery of the Merger
Agreement and the consummation by Tyco of the transactions contemplated thereby
having been obtained and made by Tyco; and (iv) ADT having received an
agreement in connection with restrictions on affiliates under Rule 145 of the
Securities Act and pooling of interests accounting treatment from each
"affiliate" of Tyco.
    

Termination of the Merger Agreement

               Right to Terminate.  The Merger Agreement may be terminated at
any time prior to the Effective Time by mutual written consent of Tyco and
ADT.  The Merger Agreement may also be terminated:

      (i) by either Tyco or ADT, if the Merger has not been consummated by
August 15, 1997;

   
     (ii) by either Tyco or ADT, if a court of competent jurisdiction or
governmental or administrative agency shall have issued a nonappealable final
order, decree or ruling or taken any other action having the effect of
permanently restraining, enjoining or otherwise prohibiting the Merger, the
Reverse Stock Split, the Share Amendment, the ADT Name Change or the New
Directors Election;
    

    (iii) by ADT, if the requisite vote of the shareholders of Tyco shall not
have been obtained by August 15, 1997, or by Tyco, if the requisite vote of
the shareholders of ADT shall not have been obtained by August 15, 1997;

     (iv) by Tyco, if (A) the ADT Board shall withdraw, modify or change its
approval or recommendation of the Merger Agreement, the Merger or the other
transactions contemplated by the Merger Agreement in a manner adverse to Tyco
or shall have resolved to do so; (B) the ADT Board shall have recommended to
the shareholders of ADT an Alternative Transaction (as defined below); or (C) a
tender offer or exchange offer for 25% or more of the outstanding ADT Common
Shares is commenced (other than by Tyco or a Tyco affiliate) and the ADT Board
recommends that the shareholders of ADT tender their shares in such tender or
exchange offer;

      (v) by ADT, if the ADT Board shall withdraw, modify or change its
approval or recommendation of the Merger Agreement or the Merger in a manner
adverse to Tyco or shall have resolved to do so, in each case in compliance
with the Merger Agreement;

     (vi) by Tyco or ADT, if any representation or warranty of ADT or Tyco,
respectively, set forth in the Merger Agreement shall be untrue when made,
such that the closing conditions in the Merger Agreement based on the truth of
the representations and warranties would not be satisfied; provided that if
such misrepresentation is curable prior to August 15, 1997, then the Merger
Agreement will not be terminable for so long as the misrepresenting party
continues to exercise its reasonable best efforts to cure the
misrepresentation;

   
    (vii) by ADT, if any representation or warranty of Tyco shall have become
untrue such that ADT's closing condition set forth in the Merger Agreement
based on the truth of its representations and warranties would not be
satisfied, or by Tyco, if any representation or warranty of ADT shall have
become untrue such that Tyco's closing condition set forth in the Merger
Agreement based on the truth of ADT's representations and warranties would not
be satisfied; provided that if any such misrepresentation is curable prior to
August 15, 1997, then the Merger Agreement shall not be terminable for so long
as the misrepresenting party continues to exercise its reasonable best efforts
to cure the misrepresentation;

   (viii) by Tyco or ADT, upon a breach of any covenant or agreement on the
part of ADT or Tyco, respectively, set forth in the Merger Agreement, such
that the closing condition to the Merger Agreement based on such party's
compliance with its covenants and agreements would not be satisfied; provided
that if such breach is curable prior to August 15, 1997, then the Merger
Agreement will not be terminable for so long as the breaching party continues
to exercise reasonable best efforts to cure the breach;

     (ix) by ADT, if the Tyco Board shall withdraw, modify or change its
approval or recommendation of the Merger Agreement, the Merger or the other
transactions contemplated by the Merger Agreement in a manner adverse to ADT
or shall have resolved to do so;
    

      (x) by Tyco, if the Tyco Board shall withdraw, modify or change its
approval or recommendation of the Merger Agreement or the Merger in a manner
adverse to ADT or shall have resolved to do so, in each case in compliance
with the Merger Agreement;
   

     (xi) by ADT or Tyco, if the 10-Day Reference Price (as defined below) for
any 10 consecutive trading day period commencing on or after April 8, 1997
shall be below $56; provided that such right to terminate may only be
exercised in respect of any such 10-day period within three trading days
following the expiration of such 10-day period;
    

    (xii) by Tyco, if the 10-Day Reference Price for the 10 consecutive
trading days ending on the fourth trading day prior to the ADT Meeting (the
"Final 10-Day Reference Price") is less than $56, and Tyco has not agreed to
change the Reverse Stock Split as provided in subclause (y) of clause (xiii)
below; or

   
   (xiii) by ADT, if (x) the Final 10-Day Reference Price is less than $56 and
(y) on or before the second trading day prior to the date of the ADT Meeting,
Tyco has not agreed by notice to ADT in writing to change the Reverse Stock
Split Ratio so that each ADT Common Share shall be consolidated in the ratio
of one Combined Company Common Share for a number of ADT Common Shares not
more than the number determined by dividing the Final 10-Day Reference Price
by $27, provided that the Reverse Stock Split Ratio will thereafter, for all
purposes of the Merger Agreement, be deemed to be such ratio.
    

               "10-Day Reference Price" means the average of the Daily Per
Share Prices for any ten consecutive trading days.  The "Daily Per Share
Price" for any trading day means the weighted average of the per share selling
prices of shares of Tyco Common Shares on the NYSE (as reported in the NYSE
Composite Transactions) for that day.

               "Alternative Transaction" means any of (i) a transaction
pursuant to which any person (or group of persons) other than Tyco or its
affiliates (a "Third Party") acquires or would acquire more than 25% of the
outstanding shares of any class of equity securities of ADT, or, in the case
of any person (or group of persons other than Tyco and its affiliates) which
had filed a Statement on Schedule 13D as of the date of the Merger Agreement
indicating that it was the beneficial owner of more than 25% of the
outstanding ADT Common Shares, would acquire an additional 5% or more of such
securities;  (ii) a merger or other business combination involving ADT
pursuant to which any Third Party acquires more than 25% of the outstanding
equity securities of ADT or the entity surviving such merger or business
combination; or (iii) any other transaction pursuant to which any Third Party
acquires or would acquire control of assets of ADT, or any of its subsidiaries
having a fair market value (as determined by the Board of Directors of Tyco in
good faith) equal to more than 25% of the fair market value of all of the
assets of ADT and its subsidiaries, taken as a whole, immediately prior to
such transaction.  The term Alternative Transaction does not include any
acquisition of securities by a broker dealer in connection with a bona fide
public offering of such securities.

               In the event of the termination of the Merger Agreement, the
Merger Agreement shall forthwith become void and there will be no liability on
the part of any party thereto or any of its affiliates, directors, officers or
shareholders except for the termination fees described below and except that
no party will be relieved from liability for any breach of the Merger
Agreement.

               Termination Fees and Expenses Payable by ADT.   ADT will pay
Tyco a fee of $150,000,000 (the "Fee"), plus Tyco's reasonable out-of-pocket
expenses relating to the transactions contemplated by the Merger Agreement
(including, but not limited to, fees and expenses of counsel and accountants
and out-of-pocket expenses (but not fees) of financial advisors) ("Expenses")
of up to $7,500,000, upon the first to occur of any of the following events;
provided that no Fee or Expenses will be payable by ADT if the Merger Agreement
has been previously terminated and such previous termination did not entitle
Tyco to receive a Fee pursuant to this provision:

      (i) the Final 10-Day Reference Price is equal to or greater than $56 and
either (x) the shareholders of ADT shall not have approved each of the Reverse
Stock Split, the Share Amendment, the issuance of Combined Company Common
Shares in the Merger, the ADT Name Change Proposal and the New ADT Directors
Proposal on or before August 15, 1997 or (y) the shareholders of ADT shall
have affirmatively disapproved any of such actions at any time on or before
August 15, 1997;

     (ii) the shareholders of ADT shall have approved an Acquisition Proposal
(other than with Tyco or its affiliates) on or before August 15, 1997;

   
    (iii) if following the termination of the Merger Agreement by Tyco
pursuant to subsection (xi) under "Termination of the Merger Agreement--Right
to Terminate" above, ADT shall accept and consummate an Acquisition Proposal
at a price per share of ADT Common Shares in excess of $29, which Acquisition
Proposal is publicly announced within 60 days of such termination;
    

     (iv) the termination of the Merger Agreement by Tyco pursuant to
subsection (iv) under "Termination of the Merger Agreement--Right to
Terminate" above;

      (v) the termination of the Merger Agreement by ADT pursuant to
subsection (v) under "Termination of the Merger Agreement--Right to Terminate"
above; or

     (vi) the termination of the Merger Agreement by Tyco pursuant to
subsection (viii) under "Termination of the Merger Agreement--Right to
Terminate" above.

   
               Upon a termination of the Merger Agreement by Tyco pursuant to
subsection (vi) under "Termination of the Merger Agreement--Right to
Terminate" above, ADT shall pay to Tyco the Expenses of Tyco relating to the
transactions contemplated by the Merger Agreement, up to $7,500,000.
    

               Termination Fees and Expenses Payable by Tyco. Tyco will pay
ADT the Fee, plus ADT's reasonable out-of-pocket Expenses of up to $7,500,000,
upon the first to occur of any of the following events; provided that no Fee
or Expenses shall be payable by Tyco if the Merger Agreement has been
previously terminated and such previous termination did not entitle ADT to
receive a Fee pursuant to this provision:

      (i) the shareholders of ADT shall have approved each of the Reverse
Stock Split, the Share Amendment, the issuance of Combined Company Common
Shares in the Merger, the ADT Name Change Proposal and the New Director
Proposal on or before August 15, 1997 and either (x) the shareholders of Tyco
shall not have approved and adopted the Merger Agreement by August 15, 1997 or
(y) the shareholders of Tyco shall have affirmatively disapproved the Merger
Agreement at any time on or before August 15, 1997; or

     (ii) the termination of the Merger Agreement by ADT pursuant to
subsection (ix) under "Termination of the Merger Agreement--Right to
Terminate" above;

    (iii) the termination of the Merger Agreement by Tyco pursuant to
subsection (x) under "Termination of the Merger Agreement--Right to Terminate"
above; or

     (iv) the termination of the Merger Agreement by ADT pursuant to
subsection (viii) under "Termination of the Merger Agreement--Right to
Terminate" above.

   
               Upon a termination of the Merger Agreement by ADT pursuant to
subsection (vi) under "Termination of the Merger Agreement--Right to
Terminate" above, Tyco shall pay to ADT the Expenses of ADT relating to the
transactions contemplated by the Merger Agreement, up to $7,500,000.
    

Other Expenses

   
               Except as described above, all costs and expenses incurred in
connection with the Merger Agreement and the transactions contemplated thereby
will be paid by the party incurring such costs or expenses, except that Tyco
and ADT will share equally all SEC filing fees and printing expenses incurred
in connection with the printing and filing of this Joint Proxy
Statement/Prospectus and any amendments or supplements hereto.
    






                                 THE MEETINGS

   
               This Joint Proxy Statement/Prospectus is furnished in
connection with the solicitation of proxies (i) from the holders of Tyco
Common Shares by the Tyco Board for use at the Tyco Meeting and (ii) from the
holders of ADT Common Shares by the ADT Board for use at the ADT Meeting.
This Joint Proxy Statement/Prospectus and accompanying form of proxy are first
being mailed to the respective shareholders of Tyco and ADT on or about May
__, 1997.
    

Times and Places; Purposes

   
               The Tyco Meeting will be held at __________________________, on
June __, 1997, starting at _____ a.m., local time.  At the Tyco Meeting, the
shareholders of Tyco will be asked to consider and vote upon (i) the approval
of the Merger and the Merger Agreement (the "Tyco Merger Proposal") and (ii)
such other matters as may properly come before the Tyco Meeting.

               The ADT Meeting will be held at Cedar House, 41 Cedar
Avenue, Hamilton HM12, Bermuda, on June __, 1997, starting at 10:00 a.m.
local time.  At the ADT Meeting, the shareholders of ADT will be asked to
consider and vote upon (i) the ADT Merger Proposals, (ii) the other ADT
Meeting Proposals and (iii) such other matters as may properly come before
the ADT Meeting.
    

Voting Rights; Votes Required for Approval

               Tyco

   
               Outstanding Voting Shares.  Notice of the Tyco Meeting is being
sent to all holders of record of the Tyco Common Shares at the close of
business on May 13, 1997, which has been fixed as the record date for the
Tyco Meeting.  All holders of record of the Tyco Common Shares on the record
date for the Tyco Meeting will be entitled to attend, and vote at, the Tyco
Meeting.  At the close of business on that date there were ________
outstanding Tyco Common Shares.

               Vote Required.  Each holder of record of Tyco Common Shares on
the record date for the Tyco Meeting is entitled to one vote for each Tyco
Common Share held of record by him or her.  Under Massachusetts law, the
presence, either in person or by duly executed proxy, of the holders of a
majority of the outstanding Tyco Common Shares entitled to vote is necessary
to constitute a quorum.  Massachusetts law requires the affirmative vote of
the holders of two-thirds of the Tyco Common Shares outstanding and entitled
to vote to approve the Tyco Merger Proposal.  If you are a Tyco shareholder
and fail to return your card, the effect will be the same as a vote against
the merger unless you appear in person at the Tyco Meeting and vote in
favor of the Merger.

               Voting Your Proxy.  The Tyco Board is soliciting proxies for
the Tyco Meeting in favor of the Tyco Merger Proposal.  A gold form of proxy
is enclosed with this document.  You are requested to complete and return this
gold form of proxy as soon as possible.  In order to be valid, the gold form
of proxy for the Tyco Meeting must be completed in accordance with the
instructions on it and received either at the Tyco Meeting or by mail no
later than _________ on June __, 1997 (Eastern Daylight Time) at the
address set forth below:
    


                         Chase Mellon Shareholder Services
                         Midtown Station
                         P.O. Box 947
                         New York, New York 10138-0747

               ADT

   
               Outstanding Voting Shares.  Notice of the ADT Meeting is being
sent to all holders of record of the ADT Common Shares at the close of
business on May 13, 1997, which has been fixed as the record date for notice
of the ADT Meeting.  Except as provided in the ADT Bye-Laws, all holders of
record of the ADT Common Shares on the date of the ADT Meeting will be
entitled to attend, and vote at, the ADT Meeting.  As of the record date for
notice of the ADT Meeting, there were outstanding and entitled to vote
[156,901,587] ADT Common Shares, including 3,182,787 ADT Common Shares
owned by a subsidiary of ADT.  Except as provided in the ADT Bye-Laws, all
of such ADT Common Shares are entitled to vote at the ADT Meeting and, on a
poll, each ADT Common Share is entitled to one vote on each matter.

               Vote Required.  ADT Common Shares will vote together as a
single class with respect to the ADT Merger Proposals and the Other ADT
Meeting Proposals. The affirmative vote of the majority of ADT Common Shares
represented and voting at the ADT Meeting is required for the approval of each
proposal to be put before the ADT shareholders at the ADT Meeting.

               Pursuant to Bermuda law, only votes cast for a matter
constitute affirmative votes. Votes represented at the meeting which are
withheld, represented by "broker non-votes" as discussed below or which
abstain from voting are counted for quorum purposes only.  At the ADT Meeting
not less than two holders of ADT Common Shares present in person or by proxy
shall form a quorum for the transaction of business, and if a quorum does not
assemble within half an hour after the time appointed for the ADT Meeting, the
ADT Meeting shall be adjourned to a future date as determined by the directors
of ADT.

               Voting Your Proxy.  The ADT Board is soliciting proxies for the
ADT Meeting in favor of the ADT Merger Proposals and the Other ADT Meeting
Proposals.  A blue form of proxy is enclosed with this document.  You are
requested to complete and return this blue form of proxy as soon as possible.
In order to be valid, the blue form of proxy for the ADT Meeting must be
completed in accordance with the instructions on it and received at the ADT
Meeting before the start of the ADT Meeting or by the times and dates set forth
below at any of the offices of ADT's registrars and agents, whose names and
addresses are set out below:
    

                  In the United States:

   
                  by 10:00 a.m. on June __, 1997 (Eastern Daylight Time):
    

                  by hand delivery at:

   
                  D.F. King & Co., Inc.
                  77 Water Street, 20th Floor
                  New York, New York 10005
                  USA
    

                  by mail to:

   
                  D.F. King & Co., Inc.
                  Wall Street Station
                  P.O. Box 411
                  New York, New York 10269-0069
                  USA

                  In the United Kingdom:

                  by 10:00 a.m. on June __, 1997 (British Summer Time)
                    by hand or mail at:
    

                  D.F. King (Europe) Limited
                  Royex House, Aldermanbury Square
                  London EC2V 7HR
                  United Kingdom

                  In Bermuda:

   
                  to the Registrars by 10:00 a.m. on June __, 1997
                     (Bermuda Time) by hand or mail
                  at:

                  AS&K Services Limited
                  Cedar House
                  41 Cedar Avenue
                  P.O. Box HM 1179
                  Hamilton HM EX
                  Bermuda
    

Proxies

   
               All Tyco Common Shares and ADT Common Shares represented by
properly executed forms of proxy received, in the case of the Tyco Meeting,
prior to or at the Tyco Meeting, or, in the case of the ADT Meeting, received
before the start of the ADT Meeting, and not revoked, will be voted in
accordance with the instructions indicated in such forms of proxy (unless, in
the case of ADT, the Secretary of ADT has received written instructions
altering the way in which the proxy is to vote, in which case the proxy will
vote in accordance with the instructions as altered).  If no instructions are
indicated on a properly executed returned form of proxy, such forms of proxy
will be voted FOR the approval of the Tyco Merger Proposal or the ADT Merger
Proposals and the Other ADT Meeting Proposals, as the case may be.

               A properly executed form of proxy for the Tyco Meeting marked
"ABSTAIN" will be counted for purposes of determining whether there is a
quorum.  However, since the affirmative vote of two thirds of the outstanding
Tyco Common Shares is required for approval of the Tyco Merger Proposal, a
form of proxy marked "ABSTAIN" will have the same effect as a vote against the
Tyco Merger Proposal unless the shareholder delivering the proxy appears in
person at the Tyco Meeting and votes in favor of the Merger.  In addition,
the failure of a Tyco shareholder to return a form of proxy will have the
same effect as a vote against the Tyco Merger Proposal.  A properly
executed proxy for the ADT Meeting marked "ABSTAIN" will be counted for
purposes of determining whether there is a quorum but will not be voted.

               Shares represented by "broker non-votes" (i.e., shares held by
brokers or nominees which are represented at a meeting but with respect to
which the broker or nominee is not empowered to vote on a particular proposal)
will be counted for purposes of determining whether there is a quorum at the
applicable Meeting, but will be considered to be voted only as to those
matters actually voted on. In accordance with NYSE rules, brokers and nominees
are precluded from exercising their voting discretion with respect to the
approval and adoption of non-routine matters such as the Merger, the ADT
Merger Proposals and the Other ADT Meeting Proposals.  Thus, absent specific
instructions from the beneficial owner of such shares, brokers are not
empowered to vote such shares with respect to the approval and adoption of the
Tyco Merger Proposal, the ADT Merger Proposals and the Other ADT Meeting
Proposals. Since the affirmative vote described above is required for approval
of the Tyco Merger Proposal, a "broker non-vote" with respect to such proposal
will have the same effect as a vote against such proposal.

               The Tyco Board and the ADT Board are not currently aware of any
business to be acted upon at their Meetings other than as described in this
Joint Proxy Statement/Prospectus.  If, however, other matters are properly
brought before either Meeting, or any adjournments thereof, including any
motion to adjourn the meeting, the persons appointed as proxies, except as
otherwise provided on the proxy card, will have discretion to vote or act
thereon according to their best judgment.

               A shareholder may revoke his or her proxy at any time prior to
its use by delivering to Chase Mellon Shareholder Services for Tyco
shareholders, or to D.F. King & Co., Inc., D.F. King (Europe) Limited or AS&K
Services Limited for ADT shareholders in the United States, the United Kingdom
or Bermuda and elsewhere, respectively, a signed notice of revocation or a
later-dated signed form of proxy or by attending the applicable Meeting and
voting in person.  In addition, ADT shareholders may alter the instructions as
to how their proxy is to vote (without revoking the proxy) by notifying the
proxies of such intention.  Attendance at the ADT Meeting or the Tyco Meeting
will not in itself constitute the revocation of a proxy.

               ADT shareholders should be aware that if the ADT Merger
Proposals are approved and if the Merger is consummated, the Western Proposals
and the Western Offer may be less likely to succeed because the Merger will
produce a material increase in the number of shares outstanding, which would
significantly increase the cost to Western of acquiring ADT or the completion
of the Merger may cause Western to withdraw or terminate its exchange offer.
In addition, if the Merger is completed before the Western Proposals Meeting,
existing Tyco shareholders would become shareholders of the Combined Company
entitled to vote on the Western Proposals and the interests of current
shareholders of ADT (including Western) in the Combined Company would be
significantly reduced.  Any ADT shareholder who wishes to revoke a proxy
previously granted in connection with the Western Proposals Meeting should
consult the instructions regarding revocation of proxies contained in the
proxy statement pursuant to which the form of proxy relating to such proxy was
furnished.

               It is the policy of Tyco and ADT to maintain the
confidentiality of proxy cards, ballots and voting tabulations that identify
individual shareholders, except where disclosure is mandated by law and in
other limited circumstances.

               The cost of solicitation of proxies will be paid by Tyco for
Tyco proxies and by ADT for ADT proxies.  In addition to solicitation by mail,
arrangements will be made with brokerage houses and other custodians, nominees
and fiduciaries to send the proxy materials to beneficial owners; and Tyco or
ADT, as the case may be, will, upon request, reimburse such brokerage houses
and custodians for their reasonable expenses in so doing.  Tyco and ADT have
each retained D.F. King & Co., Inc. to aid in the solicitation of proxies and
to verify certain records related to the solicitations. D.F. King & Co., Inc.
will receive customary fees, and expense reimbursement, for such services.  To
the extent necessary in order to ensure sufficient representation at the
applicable Meeting, Tyco or ADT may request by telephone or telegram the
return of proxy cards.  The extent to which this will be necessary depends
entirely upon how promptly proxy cards are returned.  Shareholders are urged
to send in their proxies without delay.

    
               Shareholders should not send in any stock certificates with
their proxy cards.  Transmittal forms with instructions for the surrender of
stock certificates for Tyco Common Shares and the exchange of certificates for
ADT Common Shares will be mailed by the Combined Company to former Tyco
shareholders and to ADT shareholders as soon as practicable after the
consummation of the Merger.






                          BUSINESSES OF TYCO AND ADT

Tyco

               Tyco, through its divisions and operating subsidiaries, engages
in the design, manufacture, installation and service of fire protection and
suppression systems, and the manufacture and distribution of disposable medical
supplies and other specialty products, flow control products and electrical
and electronic components. Tyco, which operates in more than 50 countries
around the world, had sales of over $5 billion during its fiscal year ended
June 30, 1996.

               Fire and Safety Services

               Tyco is the largest contractor in the world for the design and
installation of fire detection, suppression and sprinkler systems, and for the
servicing for such systems. Tyco is also a leading manufacturer and distributor
of fire detection and suppression products.

   
               Tyco's Grinnell subsidiary ("Grinnell"), which was founded in
1850, is the largest installer, manufacturer and supplier of automatic fire
sprinkler and fire alarm and detection systems in North America. Wormald
International Limited ("Wormald"), which was founded in 1889, operates as a
major fire protection company with contracting, manufacturing and distribution
operations throughout Western Europe and the Asia-Pacific region. Grinnell and
Wormald, in combination, is the largest fire protection company in the world,
forming a network of over 300 offices on five continents. The acquisition of
Thorn Security Group ("Thorn") in July 1996 further expands Tyco's worldwide
position in the fire detection and security systems market.
    

               Contracting and Service.  Tyco designs, fabricates, installs
and services automatic fire sprinkler systems, fire alarm and detection
systems, special hazard suppression systems and security systems in buildings
and other installations. Grinnell's fire protection contracting and service
business in North America operates through a network of offices located in the
United States, Canada, Mexico and Puerto Rico. Internationally, Tyco engages
in fire protection contracting and service through a network of offices in the
United Kingdom, Continental Europe, Saudi Arabia, United Arab Emirates,
Australia, New Zealand, Southeast Asia and South America.

               Tyco installs fire protection systems in both new and existing
structures. Typically, the contracting businesses bid on contracts for fire
protection installation which are let by owners, architects, construction
engineers and mechanical or general contractors. In recent years, the business
of retrofitting existing buildings in the United States and Canada has grown
as a result of local and state legislation requiring installation of fire
protection systems and reduced insurance premiums available on structures with
automatic sprinkler systems. The retrofitting and servicing of fire protection
systems in existing buildings represented approximately 65% of Grinnell's
North American contracting sales in fiscal 1996. Revenue from the servicing,
maintenance, repair and inspection of fire protection, detection and
suppression systems installed by Tyco and other contractors has increased in
recent years.

               A majority of the fire suppression systems installed by Tyco
are water-based, but Tyco is also the world's leader in providing custom
designed special hazard fire protection systems which incorporate various
specialized non-water agents such as foams, dry chemicals and gases. Systems
using agents other than water are suited for fire protection in certain
manufacturing, power generation, petrochemical, offshore oil exploration,
transportation, telecommunications, mining and marine applications. Tyco holds
exclusive manufacturing and distribution rights in several regions of the
world for INERGEN[Registered] fire suppression products. INERGEN[Registered],
an alternative to the ozone depleting agent known as halon, consists of a
mixture of three inert gases designed to effectively extinguish fires without
polluting the environment or damaging costly equipment.

               In Australia, New Zealand and Asia, Tyco, through its O'Donnell
Griffin division, engages in the installation of electrical wire and related
electrical equipment in new and existing structures and offers specialized
electrical contracting services in these markets for different types of
construction, including applications for railroad and bridge construction.

               Substantially all of the mechanical components (and, in North
America, most of the pipe) used in the fire protection systems installed by
Tyco are manufactured by Tyco.  Tyco also has fabrication plants worldwide
that cut, thread and weld pipe, which is then shipped with other prefabricated
components to job sites for installation. Tyco has developed its own
computer-aided-design technology that reduces the time required to design
systems for specific applications and coordinates fabrication and delivery of
system components. Tyco also installs alarms, detection and activation devices
and centralized monitors. With the acquisition of Thorn, Tyco is now a major
manufacturer of alarms, detection and activation devices and central
monitoring stations.

               Manufacturing.  Tyco manufactures most of the components used
in its own fire protection contracting business, as well as a variety of
products for sale to other fire protection contractors. In North America, Tyco
manufactures pipe and pipe fittings, fire hydrants, sprinkler heads and
substantially all of the mechanical sprinkler components used in an automatic
fire suppression system. In the United Kingdom, France, Germany and
Asia-Pacific, Tyco manufactures and sells sprinkler heads, specialty valves,
fire doors and electronic panels for use in fire detection systems. In Mexico,
Tyco manufactures fire extinguishers, fire hose and related equipment. With
the recent addition of Thorn, Tyco now manufactures a complete line of alarm
and detection equipment that is installed by Tyco's units and sold to other
alarm and detection installers.

               Tyco's Ansul subsidiary manufactures and sells various lines of
dry chemical, liquid and gaseous portable fire extinguishers and related
agents for industrial, government, commercial and consumer applications. Ansul
also manufactures and sells special hazard fire suppression systems designed
for use in restaurants, marine applications, mining applications, the
petrochemical industry, confined industrial spaces and commercial spaces
housing delicate and electronic equipment. Ansul also manufactures spill
control products designed to absorb, neutralize and solidify spills of various
hazardous materials.

   
               Environmental Services.  Tyco's The Earth Technology
Corporation ("Earth Tech") is a provider of a broad range of environmental,
consulting and engineering services throughout the United States. The principal
services of Earth Tech consist of full-spectrum environmental and hazardous
waste management services, infrastructure design and construction services,
facilities engineering and construction management services for institutional,
civic, commercial and industrial clients, and contract operations and
management services for water, waste water and remediation treatment
facilities operated by municipal and industrial clients. Services are provided
through a network of 40 offices located throughout North America.
    

               Disposable and Specialty Products

   
               Tyco's Disposable and Specialty Products Group consists of
Kendall, Ludlow Laminating and Coating, Armin Plastics, Twitchell, and
Accurate Forming. Kendall manufactures and distributes medical supplies,
disposable medical products and adhesive products and tapes. Ludlow Laminating
and Coating manufactures laminated and coated products. Armin manufactures
polyethylene film and packaging products. Twitchell manufactures extrusion
coated polyester yarns and woven fabrics and Accurate Forming manufactures
deep-drawn metal parts. In the first quarter of fiscal 1997, Tyco acquired
Carlisle Plastics, Inc. ("Carlisle"), a leading manufacturer of specialty
packaging materials and garment hangers.
    

               Kendall.  Kendall conducts its operations through four business
units: Kendall Healthcare, Kendall International, Kendall-Polyken and Ludlow
Technical Products.

               The Kendall Healthcare business unit markets a broad range of
wound care, vascular therapy, urological care, incontinence care, anesthetic
care and other products to U.S. and Canadian hospitals and alternate site
health care customers. Kendall Healthcare is the industry leader in gauze
production with its Kerlix[Registered] and Curity[Registered] brands. Kendall
Healthcare's other core domestic product category consists of its vascular
therapy products, principally anti-embolism stockings, marketed under the
T.E.D.[Registered] brand name, sequential pneumatic compression devices sold
under the SCD[Trademark] brand name and a venous plexus foot pump. Kendall
Healthcare pioneered the pneumatic compression form of treatment and continues
to be the dominant participant in the pneumatic compression and elastic
stocking segments of the vascular therapy market.

               Kendall's Professional Medical Products, Inc. ("ProMed") is a
leading provider of incontinent care products, marketing primarily to nursing
homes and other institutional providers of long term care. ProMed also offers
a range of other patient care products, including urological, wound care,
surgical care and respiratory care products.

               Kendall's Superior Healthcare Group, Inc. manufactures a broad
line of disposable medical supplies including respiratory, urology and nursing
care products. Kendall's Sheridan Catheter Corporation is a manufacturer of
airway management, temperature monitoring and specialty products serving
patients in anesthesia, critical care and emergency medicine.

               Kendall International is responsible for the manufacturing,
marketing, distribution and export of Kendall products in numerous countries
worldwide. Kendall International's operations are organized primarily into
three geographic regions: Europe, Latin America and the Far East. Kendall
International generally markets a range of products similar to those of
Kendall Healthcare, although the mix of product lines varies from country to
country.

   
               The Kendall-Polyken division manufactures and markets specialty
adhesive products and tapes for industrial applications, including external
corrosion protection tape products for oil, gas and water pipelines. Other
industrial applications include tapes used in the automotive industry for wire
harness wraps, sealing and other purposes, and tapes used in the aerospace and
heating, ventilation and air conditioning (HVAC) industries. Kendall-Polyken
also produces duct, packaging and electrical tapes for consumer applications
and bandages and medical tapes for Kendall's healthcare product units and for
others.

               Kendall acquired Nashua Corporation's tape business which
manufactures duct, foil and strapping tapes and spray adhesives for industrial
and consumer markets worldwide. Kendall also acquired the Betham Corporation
which develops pressure sensitive adhesives and coatings, principally for the
automotive, medical and specialty markets.
    

               The Technical Products division manufactures and sells a
variety of disposable medical products, specialized paper and film products.
These products include disposable electrodes for medical devices, hydrogels,
adhesive tapes, pressure sensitive coated papers and films used for business
forms and in printing applications, high quality facsimile paper and recording
chart papers for medical and industrial instrumentation.  The Technical
Products division has six subsidiaries. Uni-Patch is a manufacturer and
distributor of transcutaneous electrical nerve stimulation  electrodes and
related products which are used primarily in physical therapy and other forms
of rehabilitation medicine. Classic Medical Products is a manufacturer of
medical electrodes for EKGs and similar diagnostic tests. Promeon is a leading
manufacturer of gels which are used with medical electrodes for testing and
other monitoring purposes. LMI is a manufacturer of medical electrodes.
Cambrex is a producer of hydrogel wound care products. Sentry Medical
manufactures neonatal electrodes, diagnostic and monitoring electrodes,
electrotherapy electrodes and cable and lead wires.

               Ludlow Laminating and Coating.  Ludlow Laminating and Coating
produces protective packaging and other materials made of coated or laminated
combinations of paper, polyethylene and foil. Coated packaging materials
provide barriers against grease, oil, light, heat, moisture, oxygen and other
contaminants that could damage the contained products. The division produces
structural coated and laminated products such as plastic coated kraft,
linerboard and bleached boards for rigid urethane insulation panels,
automotive components and wallboard panels. Other applications include
packaging for photographic film, frozen foods, health care products,
electrical and metallic components, agricultural chemicals, cement and
specialty resins.

   
               Armin.  Armin manufactures polyethylene film and packaging
products in a wide range of size, gauge, construction strength, stretch
capacity, clarity and color. Armin extrudes low density, high density and
linear low density polyethylene film from resin purchased in pellet form,
incorporating such additives as coloring, slip and anti-block chemicals.
Armin's products include plastic supermarket packaging, greenhouse sheeting,
shipping covers and liners and a variety of other packaging configurations for
the aerospace, agricultural, automotive, construction, cosmetics, electronics,
food processing, healthcare, pharmaceutical and shipping industries. Armin
also manufactures a number of other polyethylene products, such as reusable
plastic pallets, transformer pads for electric utilities, and a large variety
of disposable gloves for the cosmetic, medical, foodhandling and
pharmaceutical industries.
    

               Twitchell.  Twitchell manufactures extrusion coated polyester
yarns and woven PVC-coated yarn fabrics and woven and knit paper fabrics.
These fabrics are sold for use principally in outdoor furniture, wall
coverings, window screening, awnings, housewares and other specialty products.
Non-woven fabric is coated and sold for use as disposable medical clothing.

               Accurate Forming.  Accurate Forming manufactures deep-drawn
metal parts, primarily barrels, caps and clips for pens and pencils and
containers, caps and closures for cosmetics, pharmaceutical packaging and
automotive applications.

               Carlisle.  Carlisle is a leading producer of industrial and
consumer plastic products. Carlisle's products include trash bags, flexible
packaging, sheeting and garment hangers.  Carlisle supplies plastic trash bags
to mass merchants, grocery chains, and institutional customers. Carlisle
manufactures Ruffies[Registered], a national brand consumer trash bag, for
mass merchants and other retail stores. Carlisle also provides heavy duty
trash can liners for institutional customers, such as food service
distributors, janitorial supply houses, restaurants, hotels and hospitals.

               Film-Gard[Registered], Carlisle's leading plastic sheeting
product, is sold to consumers and professional contractors through
do-it-yourself outlets, home improvement centers and hardware stores. A wide
range of Film-Gard products are sold for various uses, including painting,
renovation, construction, landscaping and agriculture. Carlisle's industrial
packaging film is sold for use as shrink wrap and for other packaging
requirements.

               Carlisle sells molded plastic garment hangers to garment
manufacturers, national retailers, regional or local retailers, and mass
merchants. Garment manufacturers place their clothes on Carlisle's hangers
before shipping to retail outlets. Carlisle creates, manufactures and sells
customized hanger designs to national retailers. Regional or local retailers
buy standard Carlisle hanger lines for retail clothing displays. Carlisle also
supplies mass merchants with consumer plastic hangers for sale to the general
public.

               Flow Control Products

               Tyco is a manufacturer and distributor of flow control products
in North America, Europe and Asia-Pacific. Flow control products include pipe,
fittings, valves, meters and related products which are used to transport,
control and measure the flow of liquids and gases. Tyco's Flow Control Group
includes Grinnell, Allied Tube & Conduit, Mueller Co. and a number of
specialized manufacturers of valves, fittings and couplings.

               Manufacturing.  Tyco manufactures and distributes a wide range
of flow control products, including pipe and pipe fittings, tubing, valves,
meters, couplings, pipe hangers, strut and related components. These products
are used in plumbing, heating, ventilation and air conditioning (HVAC)
systems, mechanical contracting, power generation, water and gas utilities,
oil and gas exploration, petrochemical and numerous other industrial
applications. Tyco also manufactures certain related products such as steel
tubing, custom iron castings, malleable iron pipe fittings and fencing
materials.

               Allied is the leading North American manufacturer of pipe and
other tubular products. Allied manufactures a full line of steel pipe for the
fire protection and construction industries and for commercial, residential and
institutional markets. Its mechanical tube division offers steel tubing in a
wide assortment of shapes and sizes for a variety of industrial and commercial
applications. Allied's fence division is a leader in the manufacture of
products for the residential and industrial/commercial fence markets. Allied
also manufactures metal framing systems used in the construction, industrial
and OEM markets.

               Mueller, a manufacturer of water and gas distribution products,
manufactures fire hydrants, iron butterfly and gate valves, service-line brass
valves and fittings, gas valves and meter bars, water meters, backflow
preventers and related products for sale to independent distributors and, to a
lesser extent, directly to waterworks contractors, municipalities and gas
companies throughout the United States and Canada.

   
               Over the past five years, Tyco has expanded its worldwide
manufacturing and distribution presence through a series of acquisitions and
internal growth. In North America, Grinnell manufactures forged steel fittings
and valves. In Switzerland, Neotecha manufactures Teflon lined specialty
valves for use in highly corrosive environments. In the United Kingdom,
Charles Winn (Valves) Ltd. and Hindle Cockburns manufacture specialty high
performance butterfly valves and ball valves that are used principally in the
oil and gas, chemical and processing industries. In Spain, Belgicast
manufactures valves used for waterworks and other industrial applications. In
Malaysia, Tyco manufactures couplings, fittings, steel tubing and metal framing
products.
    

               In September 1996, Tyco acquired Henry Pratt Co., James Jones
Company and Edward Barber & Co from Watts Industries, Inc. These three
operations, located in the United States and the United Kingdom, are engaged
in the manufacture and sale of valves, hydrants and fittings used primarily in
water utility, wastewater treatment and power generation markets.

               Electrical and Electronic Components

               Tyco's Electrical and Electronic Components group consists of
Simplex Technologies, Inc. ("Simplex"), Allied's electrical conduit division
and Tyco's Printed Circuit Group. Simplex manufactures underwater
communications cable and cable assemblies. Allied manufactures and distributes
electrical conduit and related components used in commercial electrical
installations. The Printed Circuit Group manufactures printed circuit boards
and assembles backplanes for the electronics industry.

   
               Simplex.  Simplex is the largest U.S. manufacturer of undersea
fiber optic telecommunications cable. Simplex also manufactures cable and
cable assemblies for the U.S. Navy, underwater electric power cable and
optical ground wire for use by power authorities and utilities, and
electro-mechanical cable for unique field applications. Simplex's principal
customer is SSI, which accounted for approximately 78% of its revenues in
fiscal 1996.  Tyco has entered into an agreement to acquire SSI.  See "Current
Developments."

               Under a multi-year engineering development program, Simplex and
AT&T Labs, Inc. have developed a proprietary encapsulation process for SSI
supplied optic fibers used in underwater telecommunications cables. Simplex
manufactures the cable and performs system assembly and has proprietary rights
to the encapsulation process. Over the past ten years, Simplex has
manufactured more than 110,000 kilometers of undersea optical cable deployed
by AT&T and others.
    

               For more than thirty years, Simplex has been the primary
supplier of cable and cable assemblies to the U.S. Navy for use in
data-gathering systems. Cable for U.S. Navy systems is manufactured under
various types of contracts, including cost-plus-incentive fee, time and
material, and fixed-price.

               Allied Electrical Conduit.  Allied's electrical conduit
division is one of the leading producers of steel electrical conduit in the
United States. Electrical conduit is galvanized steel tubing designed to
contain current-carrying electrical wires both inside and outside building
structures. The conduit also serves as an electrical ground that ensures
proper operation of circuit interruptors and provides a channel into which
additional wires can be inserted or removed as electrical needs change. The
division manufactures a full line of electrical conduit as well as metal
framing and other products.

               Printed Circuit Group.  Tyco's Printed Circuit Group of
companies is one of the largest independent manufacturers of complex
multi-layered printed circuit boards and assemblers of backplanes in the United
States. Printed circuit boards are used in the electronics industry to mount
and interconnect components to create electronic systems. They are categorized
by the number of sides or layers that contain circuitry, which could be
single-sided, double-sided or multi-layer. In general, single and double-sided
boards are less advanced. Multi-layer boards provide greater interconnection
density while decreasing the number of separate printed circuit boards which
are required to accommodate powerful and sophisticated components. Backplanes
include printed circuit boards and are assemblies of connectors and other
electronic components which distribute power and interconnect printed circuit
boards, power supplies and other system elements.

               The Group manufactures highly sophisticated double-sided, mass
molded boards of up to eight layers, precision tooled, custom laminated
multi-layer boards of up to 68 layers and sophisticated flex-rigid circuit
boards for use in environmentally demanding conditions. The majority of the
Group's sales are derived from its high-density multi-layer boards. Tyco's
backplanes facility produces fully assembled units utilizing press-fit or
soldered connection technology, custom pin grid array sockets and surface
mounted assembly. The printed circuit boards and backplanes manufactured by
Tyco are designed by customers and are manufactured on a job order basis to
the customers' specifications. In January 1997, Tyco acquired ElectroStar,
Inc., a leading U.S. manufacturer of complex printed circuit boards used in
sophisticated electronic equipment.

ADT

               General

               ADT, through its subsidiaries, is engaged in two service
businesses, electronic security services in North America and Europe and
vehicle auction and related services in the United States. In this section,
the term "ADT" is used to refer to the relevant operating subsidiary of ADT
Limited engaged in that part of the business being described where the term
appears.

               ADT's principal activities in the electronic security services
business are the electronic monitoring and maintenance of its installed base
of security systems and the installation of new, monitored security systems to
add to its installed base. Monitored systems may be sold or, as is most often
the case, ADT may retain ownership of installed systems. ADT receives
contractual recurring fees for monitoring security systems through its
electronic customer monitoring centers and for maintenance of security systems
installed at customer premises and other related services. ADT sells, installs
and maintains monitored security systems, integrated electronic security
systems and other electronic security products for additional fees. Annualized
contractually recurring fees for electronic monitoring and maintenance of
security systems installed at customer premises, and other related services,
as of December 31, 1996, represented approximately 65 per cent of ADT's total
electronic security services revenues in North America and Europe for 1996.
The remainder of ADT's security revenues were derived from the outright sale
and installation of security systems, the installation of security systems in
accordance with monitoring service agreements and the maintenance of security
systems on a non-contractual basis.

               ADT's vehicle auction business operates a network of large
modern auction centers in the United States which provide an organized
wholesale marketplace for the sale and purchase of used vehicles. Principal
sellers, or consignors, include new and used vehicle dealers, vehicle
manufacturers, fleet operators, leasing companies, financial institutions and
government agencies. Principal purchasers include franchise and non-franchise
vehicle dealers and distributors who acquire vehicles to sell in the retail
market.

               The following table presents the proportion of revenues derived
by ADT from electronic security services and vehicle auction services in 1995
and 1996.

<TABLE>
<CAPTION>
                                                   Proportion of Total Electronic
                                                              Security                       Proportion of Total
                                                         Services Revenues                    Business Revenues
                                                   ------------------------------            -------------------
                                                     1995                 1996               1995           1996
                                                     ----                 ----               ----           ----
<S>                                            <C>                  <C>                  <C>             <C>
Electronic Security Services
North America..............................          71%                  75%                 54%            62%
United Kingdom and Continental Europe......          29%                  25%                 22%            20%
</TABLE>



<TABLE>
<CAPTION>
                                                     Proportion of Total
                                                       Vehicle Auction              Proportion of Total
                                                      Services Revenues              Business Revenues
                                                     -------------------            -------------------
<S>                                              <C>             <C>            <C>             <C>
                                                     1995           1996            1995           1996
                                                     ----           ----            ----           ----
Vehicle Auction Services
United States................................         62%           100%             15%            18%
United Kingdom and Continental Europe........         38%             *               9%             *

<FN>
- ------------
* ADT's vehicle auction services businesses in the United Kingdom and
continental Europe were disposed of in the fourth quarter of 1995.
</TABLE>

Electronic Security Services

               Business Strategy.  ADT[Registered] is a leading name in
electronic security services, and ADT believes that its name is important in
the marketing of its security services and in competing with other electronic
security service providers. Before 1987, ADT's electronic security services
business served predominantly commercial customers. Since 1987, ADT's goals
have been to create a lower cost, more efficient operation, suitable for
long-term growth and greater profitability, and to take advantage of the
economies of scale resulting from increased utilization of its infrastructure.
Since 1987, ADT has (i) reduced the number of central stations and equipped
its customer monitoring centers with enhanced computer technology to further
automate the monitoring process and thus provide increased monitoring
capacity, (ii) modernized and streamlined its computer-based administration
and control systems, (iii) enhanced customer service programs through improved
training programs for sales, management, installation and service employees
and (iv) intensively marketed electronic monitoring services to residential
customers to take greater advantage of the increased monitoring capacity
created by the monitoring center consolidation and modernization program.

               Between 1987 and 1993, ADT significantly reduced the number of
its central stations from 162 to 30 in North America and Europe while
increasing monitoring capacity and maintaining geographical coverage. Since
then ADT has continued to pursue its strategy of central station
consolidation, although closures have taken place at a slower rate. Further
opportunities for central station consolidation now exist following the
acquisition of ASH in 1996.  In the first quarter of 1997, ADT announced that
it was investing in planned enhancements to its technological infrastructure
to facilitate a further consolidation of its monitoring center network in order
to provide for future anticipated growth opportunities while lowering costs
and increasing monitoring capacity and operating efficiency.

               As a result of ADT's program implemented in 1988 to target the
residential sector in North America, as well as growth in the level of
consumer concern over crime and security generally and the availability of
lower priced systems, ADT has significantly expanded its residential customer
base in North America. Since 1988, ADT has enjoyed an annual compound growth
rate in residential unit sales in excess of 36 per cent. ADT believes that
because of the success of its sales and marketing efforts since 1988, it is
uniquely positioned to benefit from the range of technological developments
that are expanding and diversifying the types of services that ADT is able to
offer.

               During the past several years, ADT's business has been evolving
from that of primarily an intrusion alarm company into a data information
company. ADT has, in the past few years, been offering energy management
products and services to regulate the temperature and lighting in a customer's
premises. This service has been achieved through the use of a communication
protocol which utilizes the premises' existing alternating-current wiring.
Another creative use of new technologies has permitted the launch of
CarCop[Registered] which combines three significant infrastructures, cellular
communications, the global positioning satellite system and ADT's 24 hour
monitoring services, to provide a revolutionary new personal protection and
vehicle security service.

               ADT believes that its broad customer base, its unique national
distribution system and its highly skilled workforce provide it with a strong
capacity to exploit new technologies and, given the rapid pace of
technological change, ADT anticipates that it will explore partnering
opportunities with premier companies in a variety of industries.

               ADT's overall goal is to expand its customer base in both the
commercial and residential sectors. The commercial sectors in North America,
the United Kingdom and continental Europe represent well established markets
with growth prospects closely related to the overall economic growth in these
markets. ADT's strategy is to retain a high percentage of its existing
commercial and residential customers by continuing to provide high quality
service. As part of its strategy to maintain and enhance its commercial market
position in North America, ADT has a national accounts sales team in place in
the United States to serve customers that have multiple locations. ADT
believes that the North American residential marketplace continues to
represent a relatively unpenetrated market, and ADT's strategy is to continue
to market and install large numbers of new residential security systems,
primarily in this market. ADT is continuing to implement this strategy through
intensive advertising and marketing in metropolitan areas. ADT believes that
incremental monitoring revenues from new customers should enhance operating
margins because additional customers can be served through ADT's existing
monitoring facilities with very little impact on ADT's total operating costs
associated with monitoring security systems. ADT, however, incurs marketing
costs associated with the sale of new systems and incremental installation
costs in respect of each new system sold which are partly offset by a fee
charged to the customer on installation of the system. In the first quarter of
1997, ADT announced that it was investing in planned enhancements to its
technological infrastructure to facilitate monitoring center consolidation and
provide increased capacity for future anticipated growth opportunities.

               Consistent with its strategy, ADT acquired Alert Centre, Inc.
in the fourth quarter of 1995 and merged with ASH in the third quarter of 1996
adding, in aggregate, over 375,000 customers to ADT's customer base. The
acquisition of Alert also provided ADT with an established dealer program
under which security systems are installed by third parties with the
monitoring contracts being onsold to ADT for monitoring. Such a program
represents a cost effective way for ADT to further enhance its operating
leverage. The acquisition of ASH gave ADT leadership in the electronic
security services sector in the United Kingdom and will provide ADT with a new
marketing opportunity in the UK residential market place.

               The following table presents the approximate number of
commercial and residential customers in North America and Europe contracting
with ADT for the monitoring or maintenance of electronic security systems,
together with the aggregate annualized service revenue under contract, as of
December 31, 1996, and the annual combined discontinuance rate for commercial
and residential contracts in respect of 1996.

<TABLE>
<CAPTION>
         Number of                     Number of                                              Annual Combined
    Commercial Customers         Residential Customers      Annualized Service Revenue      Discontinuance Rate
    --------------------         ---------------------      --------------------------      -------------------
<S>                             <C>                        <C>                             <C>
          672,000                      1,149,000                   $920 million                    10.4%
</TABLE>


               Annualized service revenue and annual combined discontinuance
rate are defined under "Management's Discussion and Analysis of Financial
Condition and Results of Operations--Results of Operations--Electronic
Security Services" in ADT's Annual Report on Form 10-K for the Year ended
December 31, 1996.

               Commercial.  ADT provides electronic security services and
products to financial institutions, industrial and commercial businesses and
complexes, warehouses, facilities of federal, state and local government
departments, defense installations, and health care and educational
facilities. ADT conducts its commercial operations in the United States,
Canada, the United Kingdom, Spain, France, Belgium, Greece, The Netherlands
and the Republic of Ireland. ADT sells, installs, monitors and maintains
electronic security systems and products located at its customers' premises.
These systems and products are tailored to customers' specific needs and
include electronic monitoring services that provide intrusion and fire
detection, as well as card or keypad activated access control systems and
closed circuit television systems. ADT also markets standard security packages
for specific types of commercial customers, such as retailers and banks.
Certain commercial customers require more complex electronic security systems.
To meet this demand, ADT also sells integrated electronic security systems
that combine a variety of electronic security services and products. These
systems are integrated by ADT to provide a single computer controlled security
system. Integrated security systems are typically owned by the customer and
can range in price from a few thousand to several million dollars. Integrated
security systems may be monitored by the customer at its premises or connected
to an ADT monitoring center. In either case, ADT usually provides support and
maintenance for these systems through service contracts.

               The systems installed at commercial customers' premises may be
owned by ADT or, as in the case of most integrated systems, by the customer.
When the system is sold, the customer pays ADT the purchase price upon
installation, and the customer also pays an installation fee. When monitoring
equipment is owned by ADT, as is most often the case, only an installation fee
is charged. Most customers also agree to pay an annual service charge for
monitoring and maintenance. Some customers elect to pay for maintenance on a
per visit basis. Service contracts for integrated security systems are
negotiated on an individual basis. For integrated systems, a separate fee is
charged for systems integration and installation. Service contracts are
negotiated on an individual basis depending upon the number of systems
monitored, the type of alarm transmission and the level of response services
required.

               STAT Resources Inc. ("STAT Resources") estimates that total
United States commercial electronic security systems and services market
revenues were approximately $8.0 billion in 1996. ADT accounted for
approximately 7.7 per cent of this amount.

               Commercial customers are motivated to purchase security systems
to protect their property, employees and customers and by their insurance
carriers, which may offer lower premium rates if a security system is
installed or require that a system be installed as a condition to coverage. Of
those insurance carriers in North America which offer lower premiums or will
provide coverage only to customers with centrally monitored alarm systems,
most require the monitoring center to be approved by Underwriters
Laboratories, Inc. ("UL"). UL requires each monitoring center to meet
specified design, technical and operational standards, including back up power
capability. UL confirms compliance with its specifications through periodic
on-site inspections. All of ADT's customer monitoring centers in the United
States are UL approved.

               As of December 31, 1996, approximately 478,000 commercial
customers, some of which have multiple locations, were under contract in North
America, approximately 153,000 were under contract in the United Kingdom and
approximately 41,000 were under contract in continental Europe. The electronic
security services business in Europe services primarily commercial customers.
In 1996, approximately 68 per cent of ADT's total electronic security services
revenues in North America and Europe were derived from commercial customers.
The electronic security services division is not dependent upon any single
customer, as the revenue from any one customer does not exceed one per cent of
the division's total net revenues.

               Contracts with commercial customers for monitoring and
maintenance services are usually for an initial five-year term, automatically
renewing on a year-to-year basis thereafter, unless canceled. A substantial
number of contracts are now beyond their initial term and are therefore on an
automatic renewal basis. It has been ADT's experience that monitoring
contracts for security systems are generally renewed upon their expiration.
Contract discontinuances, however, do occur, principally as a result of
customer relocation or closure.

               ADT markets its electronic security services to commercial
customers through a direct sales force in North America and Europe and through
direct mail and print advertising. Customers that have multiple locations in
North America are serviced by a separate national accounts sales force.

               Residential.  Residential electronic security services are
primarily marketed to customers in North America and consist of the sale,
installation, monitoring and maintenance of electronically monitored security
systems to detect intrusion and fire. Residential customer service and
monitoring are performed from the same facilities as those used for commercial
accounts.

               STAT Resources estimates that total United States residential
electronic security systems and services market revenues were approximately
$5.0 billion in 1996. ADT accounted for approximately 7.5 per cent of this
amount.

               As part of its business strategy, ADT began to intensively
market monitored security systems to residential customers in North America in
1988, and ADT believes that it has been able to sell a large number of
residential security systems due to the growing level of consumer concern over
crime and security generally and the availability of lower priced systems. In
addition, residential customers are usually able to obtain more favorable
insurance rates if an electronically monitored security system is installed in
their home. ADT targets two groups of residential customers, those who
typically require relatively inexpensive, standard electronically monitored
security systems and a smaller group of residential customers who require more
sophisticated systems.

               In 1996, ADT contracted to install and monitor approximately
280,000 new residential security systems, principally in North America, and as
of December 31, 1996, ADT had approximately 1,149,000 residential customers
under contract for monitoring services, of which approximately 90 per cent
were located in North America. In 1996, approximately 32 per cent of ADT's
total electronic security services revenues in North America and Europe were
derived from residential customers. On average, fees charged by ADT for
residential monitoring services are lower than the fees charged for commercial
monitoring services. Contracts for residential services entered into after
1990 have usually been for an initial three-year term, automatically renewing
on a year-to-year basis thereafter, unless canceled. For contracts entered
into after April 1992, automatic renewal has been for two-year terms, unless
canceled. A substantial number of contracts are now beyond their initial term
and are therefore on an automatic renewal basis. It has been ADT's experience
that residential contracts are generally renewed upon their expiration.
Contract discontinuances, however, do occur, principally as a result of
customers relocating.

               In North America, ADT usually retains ownership of standard
residential systems whereas the more sophisticated systems are usually
purchased by the customer. When the system is sold, the customer pays ADT the
purchase price upon installation, and the customer also pays an installation
fee. When the system is owned by ADT, as is most often the case, only an
installation fee is charged. Substantially all residential customers agree to
pay an annual service charge for monitoring and may also subscribe for
maintenance services. Uniform package prices are offered to residential
customers who purchase ADT's standard residential security system which
includes a fixed number of detection devices. Frequently, customers add
detection devices to expand the coverage of the system for which ADT charges
an additional installation fee and an additional sales charge if the system is
purchased. Pricing for residential customers who require more sophisticated
systems depends upon the monitoring components installed, the type of alarm
transmission and other services required.

               ADT markets its electronic security services to residential
customers through television and radio advertising, print advertising,
telemarketing, direct mail and through a direct residential sales force, as
well as through approximately 120 independent ADT authorized dealers and
through third party affinity marketing arrangements.

               Installation, Service and Maintenance.  As part of its effort
to provide high quality service to its commercial and residential customers,
ADT maintains a trained installation, service and maintenance force of in
North America and Europe. These employees are trained by ADT to install and
service the various types of commercial and residential security systems which
are marketed by ADT. ADT also uses sub-contracted personnel where appropriate.

               Product Sourcing.  ADT does not manufacture any of the
components used in its electronic security services business, although it does
provide its own specifications to manufacturers for certain security system
components and undertakes some final assembly work in respect of more
sophisticated systems. Due to the general availability of the components used
in its electronic security services business, ADT believes that it is not
consistent with its role as a services company to be involved in
manufacturing. This policy allows ADT to obtain the components of its systems
from a number of different sources and, by so doing, to supply its customers
with the latest technology generally available in the industry. ADT is not
dependent on any single source for its supplies and components and has not
experienced any material shortages of components.

               Monitored Electronic Security Systems.  ADT's electronically
monitored security systems involve the use on a customer's premises of devices
designed to detect or react to various occurrences or conditions, such as
intrusions, movement, fire, smoke, flooding, environmental conditions
(including temperature or humidity variations), industrial operations (such as
water, gas or steam pressure and process flow controls) and other hazards. In
most systems, these detection devices are connected to a microprocessor based
control panel which communicates through telephone lines to an ADT monitoring
center where alarm and supervisory signals are received and recorded. Systems
may also incorporate an emergency "panic button," which when pushed causes the
control panel to transmit an alarm signal that takes priority over other alarm
signals. In most systems, control panels can identify the nature of the alarm
and the areas within a building where the sensor was activated and transmit
the information to an ADT customer monitoring center. Depending upon the type
of service for which the subscriber has contracted, monitoring center
personnel respond to alarms by relaying appropriate information to the local
fire or police departments, notifying the customer or taking other appropriate
action, such as dispatching employees to the customer's premises.

               In most systems, the control panel communicates with an ADT
customer monitoring center through one of four telephone line transmission
systems, direct wire, multiplex, digital communicator or derived channel.
Direct wire and multiplex systems are used mainly for commercial customers who
require a higher level of security, whereas digital communicator or derived
channel systems are used primarily in systems where cost is more important.
Direct wire transmission uses a dedicated leased telephone line and is the
most expensive form of monitoring connection. The multiplex system uses a
remote device to receive signals from multiple customers' premises and
concentrate and retransmit them over a dedicated leased telephone line to an
ADT customer monitoring center. These two transmission methods allow ADT to
continuously monitor the customer's security system to confirm that the
connection to the monitoring center is functioning properly. The multiplex
system provides the same level of security as direct wire but is less costly
due to the reduced number of dedicated telephone lines which are necessary to
monitor the same number of customers. ADT has a continuing selective
conversion program to replace direct wire transmission systems with lower cost
multiplex or digital systems. These conversions typically replace older
equipment and result in a reduction in telephone line costs and in the
frequency of customer service calls.

               A security system which utilizes a digital communicator
responds to an event by dialing the monitoring center through the customer's
regular telephone line. Unlike multiplex and direct wire systems, these systems
are not continuously monitored, and if a control panel or the telephone line
is not functioning properly the monitoring center may not be alerted. The
derived channel system, which is not available in all markets, ties into the
existing regular telephone line network but allows parallel simultaneous
communication on one line using separate distinct frequencies. Using the
derived channel system, it is possible to continuously monitor a digital
communicator connection over the customer's regular telephone line. In certain
markets ADT also offers systems with backup transmission capability through
radio frequency transmission or the local cellular telephone network.

               Other Security Businesses.  ADT entered the mobile security
services market in 1996 with the launch of CarCop[Registered], a vehicle
security system introduced in the fourth quarter of 1996 in conjunction with
Mobile Security Communications, Inc. which is responsible for the sale and
installation of the CarCop product. CarCop combines ADT's 24 hour monitoring
services with cellular communications technology and the Global Positioning
Satellite system to provide constant security coverage for a vehicle and its
occupants whether the vehicle is parked, unattended or in use. The system can
detect a range of emergency situations and, through utilizing ADT's 24 hour
monitoring services and employing satellite tracking technology, the
appropriate assistance can be despatched to the vehicle's exact location at
any time, day or night.

               Risk Management.  The nature of the services provided by ADT
potentially exposes it to greater risks of liability for employee acts or
omissions or product liability than may be inherent in many other service
businesses. To attempt to reduce this risk, ADT's electronic security service
contracts contain provisions limiting its liability and requiring
indemnification by its customers. ADT also carries insurance of various types,
including general liability and errors and omissions insurance, to protect it
from product defects and negligent acts of its employees. ADT obtains such
insurance at rates and upon terms negotiated periodically with various
underwriters. The loss experience of ADT and, to some extent, other security
services companies, may affect premium rates charged to ADT. As of December
31, 1996 such policies provided that ADT retain liability for the first $1.0
million per occurrence. Certain of ADT's insurance policies and the laws of
some states may limit or prohibit insurance coverage for punitive or certain
other kinds of damages arising from employee misconduct. In addition, in some
states ADT's limitation of liability clause may be ineffective in cases of
gross negligence and in certain other situations.

               Vehicle Auction Services

               The Industry.  Vehicle auctions constitute a principal channel
of distribution and redistribution for used vehicles. An auction brings
together, in one location, dealers seeking to restock and diversify their
inventory of used cars with a high volume of various makes and models provided
by sellers seeking to dispose of their vehicles. The vehicle auction industry
provides a reliable marketplace where many dealers participate in the
auction's bid process and thus establish true wholesale prices for used
vehicles. Vehicle auctions are preferred by many dealers, financial
institutions and other sellers because an auction provides an efficient,
cost-effective and convenient method of vehicle resale at the prevailing
market price.

               The principal sources of vehicles for sale through auctions are
consignments by new and used vehicle dealers, vehicle manufacturers, corporate
owners of vehicles such as fleet operators, daily rental companies, leasing
companies, banks and other financial institutions, manufacturers' credit
subsidiaries and government agencies. The vehicles consigned by dealers
include vehicles of all types and ages and include vehicles that have been
traded in against new car sales. Vehicles consigned by corporate and financial
owners include both repossessed and off-lease vehicles and, as a result, are
normally in the range of one to four years old. The principal purchasers of
vehicles at ADT's auctions are new and used vehicle dealers and distributors.

               ADT believes that the consignment of vehicles from dealers is
the foundation of the auction industry. Dealers rely on the sale of used
vehicles for a significant proportion of their profits and are both buyers and
sellers at auction.

               A significant number of vehicles sold at auction in recent
years has been attributable to vehicles being disposed of by domestic and
import manufacturers who contract with certain auctions to sell used vehicles
on their behalf. In the late 1980's, vehicle manufacturers found it
advantageous to produce more vehicles than were necessary to satisfy immediate
retail demand. These vehicles were either sold to daily rental car companies
with a guarantee by such manufacturers to repurchase the vehicles or were
leased to the daily rental car companies ("Program Cars"). Upon repurchase,
the vehicle manufacturers chose to remarket these late-model cars to their
dealers primarily through the vehicle auction network. Program Car auctions
are restricted to each manufacturer's franchised dealers with the exception of
auctions for some small volume import manufacturers. According to industry
sources, the number of vehicles coming to auction from this source reached a
peak of 1.6 million units in 1991. As the industry came out of recession in
1992, volumes reduced and have stabilized at around 1.1 million vehicles per
year. When the number of cars available to daily rental companies through
manufacturers' guaranteed repurchase programs was at its peak, many of the top
rental companies obtained large numbers of their vehicles through such
programs. As manufacturers have reduced their buy back programs, the daily
rental companies have been obliged to purchase more vehicles in their own
names and, consequently, their need to remarket vehicles at the end of their
life cycle has increased.

               Vehicles owned by corporations and financial institutions
represent another major source of vehicles for sale at auction and include
vehicles owned by daily rental companies, vehicles from company fleets, end of
term or early termination vehicles from leasing companies, including
manufacturers' finance subsidiaries, vehicles from finance companies,
including repossessed vehicles, and vehicles from the public sector. The
dynamics of this segment are changing, particularly as the trend towards
leasing new vehicles by individuals under manufacturers' lease programs
increases.

               ADT Auctions.  As of December 31, 1996, ADT operated 27 vehicle
auction centers in the United States where it is the second largest provider
of vehicle auction services. In 1996 the aggregate value of vehicles sold
through ADT auction centers was approximately $8.7 billion. Substantially all
of the vehicles sold at ADT auction centers are passenger cars and light
trucks with the balance consisting of heavy trucks and industrial vehicles.

               The following table presents the approximate number of vehicles
entered and sold through all of ADT's vehicle auction centers in the United
States during 1994, 1995 and 1996.

                               1994           1995           1996
                            ----------     ---------      ---------
Vehicles Entered......      1,660,000      1,798,000      1,881,000
Vehicles Sold ........        967,000        994,000      1,064,000


               Business Strategy.  ADT has been a leader in developing the
wholesale vehicle auction business in the United States. ADT aims to provide a
wholesale redistribution system for used vehicles which is efficient,
economical and reliable. ADT's specific strategies are (i) to maintain and
further strengthen its current relationships with vehicle manufacturers,
fleet/lease operators, daily rental companies and other significant vehicle
suppliers and dealers that both supply vehicles for auction and purchase
vehicles at auction and (ii) to increase ADT's share of total used vehicle
transactions. ADT is pursuing these strategies in part by encouraging more
vehicle dealers to attend its auctions.

               Where possible, ADT categorizes its auction sales in order to
facilitate the matching of appropriate buyers with vehicles being offered for
sale. Auctions may be categorized by the type of vehicle being sold or by age
of vehicle, mileage or source, for example ex-rental vehicles. ADT maintains a
record of dealers that are authorized to bid at its auctions and employs
direct marketing techniques to target dealers who are known buyers for the
category of vehicle being auctioned and who are registered with ADT as
approved buyers. ADT also holds closed sales for manufacturers' vehicles,
including Program Cars and fleet vehicles, restricted to dealers holding a
franchise from that particular manufacturer.

               ADT keeps its site location strategy and real estate
requirements under continuous review together with the potential benefits of
expanding its network through the acquisition of vehicle auction businesses
and the development of new auction centers. ADT however believes that the
geographic coverage of its auction network in the United States is
substantially complete.

               Auction Operations.  ADT operates a network of large modern
auction centers and provides a comprehensive range of vehicle redistribution
services. These services include collection and transportation of a seller's
vehicles to an auction center, reconditioning the vehicles to retail
standards, matching the vehicles with the auction market most likely to
generate the highest amount of sale proceeds and delivering the vehicles to
the buyer. Separate fees are charged for each of these services. ADT acts
solely as an agent in auction transactions and does not purchase vehicles for
its own account. ADT repurchases a small number of vehicles under its buyer
protection programs which require it to repurchase vehicles that have suffered
odometer tampering or that have an undisclosed salvage history.  ADT operates
almost exclusively in the wholesale marketplace. In general, the public is not
permitted to attend auctions.

               When a vehicle arrives at an ADT auction center, it is checked
in and assigned a computer tracking number. A seller may instruct ADT to
perform various services including vehicle appraisal, appearance
reconditioning and paint or body work to prepare the vehicle for auction. The
title is checked against a computer database held by ADT. If a salvage history
appears, the seller must either disclose the damage or withdraw the vehicle
from the auction. ADT completes all requested services and holds the vehicles
in secure parking areas until the scheduled auction day. The auction centers
use computerized control systems to track vehicles through each step of the
auction process. ADT is responsible for the vehicles while they are under its
control.

               Generally, ADT's auction centers hold regularly scheduled
auctions for vehicles from specific market sources. Additional auctions are
scheduled as necessary, including auctions for specific types or categories of
vehicles, such as heavy trucks, municipal and agricultural equipment and
classic cars. A typical auction center consists of an auction hall, large
paved areas for the storage of vehicles, facilities for reconditioning and
separate areas for parking vehicles immediately prior to auction, some of
which are covered. Auction halls typically have a number of lanes through
which vehicles are normally driven, and where the auction bidding process
takes place. This is a continuous process that enables a large number of
vehicles to be auctioned quickly and efficiently. The auction hall building
also contains the cashiers and other administrative personnel, as well as
cafeteria and other customer facilities. When a vehicle is sold, the paperwork
associated with a sale, including conveyance instruments, title or title
applications and tag applications, is generally processed within one hour of
the sale and immediate delivery arrangements are made. A particular vehicle
may pass through the auction system more than once prior to being sold to a
new owner.

               ADT is responsible for payment to sellers upon presentation of
title after a vehicle is sold. If purchases are made other than on a cash
basis, ADT determines in advance the credit-worthiness of the buyer. It is
customary for buyers at ADT's auctions to pay by banker's draft. The auction
collects funds on drafts within an average of ten working days. ADT's bad debt
experience on these transactions is negligible.

               Sources of Vehicles.  The principal sources of vehicles for
sale at ADT's auctions are consignments by new and used vehicle dealers,
vehicle manufacturers, corporate owners such as fleet operators, daily rental
companies, leasing companies, banks and other financial institutions,
manufacturers' credit subsidiaries and government agencies.

               The supply of consignment vehicles from dealers is relatively
constant throughout the year. The number of Program Cars and vehicles
consigned to auction by corporate fleet owners may fluctuate considerably
throughout the year. As a consequence, auction revenues may fluctuate from
quarter to quarter and at certain times during the year ADT may be storing
large numbers of vehicles awaiting auction.

               ADT contracts with vehicle manufacturers for the auction of
Program Cars. These contracts, which do not require the manufacturers to sell
any minimum number of vehicles through ADT's auctions, generally have a term
of one year and may be terminated upon 30 days' notice. In 1996, approximately
27 per cent of the vehicles sold at ADT auctions were Program Cars, compared
to approximately 31 per cent in 1995. ADT also auctions vehicles from the
manufacturers' own fleets and from manufacturers' affiliates such as their
credit subsidiaries.

               During 1996, General Motors Corporation and its credit
subsidiaries accounted for approximately 8 per cent of the vehicle auction
division's United States revenues. ADT believes that its relationship with
General Motors Corporation and the other vehicle manufacturers with which it
does business is good. The loss of General Motors Corporation's business
would, however, have a material adverse effect on the auction division's
operations.



                           ELECTION OF DIRECTORS

   
               The Merger Agreement provides that ADT shareholders will be
asked at the ADT Meeting to vote to increase the number of directors on the
ADT Board to eleven, remove all but three of the current members of the ADT
Board and elect the eight current directors of Tyco listed below to the
Combined Company Board effective at the Effective Time of the Merger.  The ADT
Board presently consists of eight members.  Upon consummation of the Merger,
as a result of the removal of the five ADT directors indicated below and the
election to the ADT Board of the current Tyco directors, the current Tyco
directors will constitute eight of the eleven members of the Combined Company
Board.  Mr. Ashcroft and two current independent directors of ADT will
constitute the remaining directors of the Combined Company.  While Tyco and
ADT expect that the Merger will be consummated promptly after the Meetings,
the current ADT Board will remain in office until the effectiveness of the
Merger.

               Unless otherwise specified in the form of proxy, the persons
named in the form of proxy will vote the shares represented by each properly
executed form of proxy for the election as directors of the Combined Company
of the persons named below as nominees.  ADT believes that the nominees will
stand for election and will serve if elected as directors.  However,  in
accordance with the Merger Agreement, if any of the nominees listed below
fails to stand for election or will be unable to accept election, the proxies
will be voted for the election of such other person or persons as are
designated by Tyco and are reasonably acceptable to ADT.
    

Information Concerning Nominees

               The following table sets forth the names and ages of the ADT
Board's nominees for election as directors effective as of the Effective Time
of the Merger, each such person's principal occupation or employment during
the past five years, and any directorships held by such person in any company
with a class of securities registered under the Exchange Act (other than
Tyco).  Each of the nominees is currently a director of Tyco.  None of the
nominees currently holds any ADT Common Shares.  For information concerning
the Tyco Common Shares held by each of the nominees, which will be exchanged
for Combined Company Common Shares in the Merger, see "Security Ownership of
Certain Beneficial Owners of Tyco and Management of Tyco" below.

<TABLE>
<CAPTION>
                Name                      Age     Principal Occupation or Employment; Directorships
- -------------------------------------   ------    -------------------------------------------------
<S>                                      <C>      <C>
L. Dennis Kozlowski..................     50      Chairman of the Board of Tyco (January
                                                  1993--present); Chief Executive Officer of Tyco
                                                  (July 1992--present); President of Tyco
                                                  (December 1989--present); President, Grinnell
                                                  Corporation (January 1984--present); Director,
                                                  Thiokol Corp. (aerospace and defense products)
                                                  (August 1993--present); Director, Applied Power
                                                  Inc. (control products) (July 1994--present);
                                                  Director, Raytheon Company (electronic systems
                                                  and equipment) (June 1995--present); Director,
                                                  RJR Nabisco Holdings Corp. (June 1996--
                                                  present).

Joshua M. Berman.....................     58      Counsel to Kramer, Levin, Naftalis & Frankel
                                                  (counselors at law) (April 1985--present);
                                                  Secretary of Tyco.

Richard S. Bodman....................     58      Managing General Partner, AT&T Ventures LLC
 .                                                (May 1996--present); Senior Vice President,
                                                  Corporate Strategy and Development, AT&T
                                                  Corporation (communications) (August
                                                  1990--May 1996); Director, Reed Elsevier, plc
                                                  (publishing) (June 1996--present); Director, Lin
                                                  Television (broadcasting) (May 1996--present);
                                                  Director, National Housing Partnerships Inc. (real
                                                  estate) (August 1995--present).

John F. Fort, III....................     56      Chairman of the Board of Tyco (1982--December
                                                  1992); Chief Executive Officer of Tyco
                                                  (1982--June 1992); Director, Dover Corporation
                                                  (diversified manufacturer) (November
                                                  1989--present); Director, Roper Industries
                                                  (diversified products) (December 1995--present).

Stephen W. Foss......................     55      Chairman, President and Chief Executive Officer,
                                                  Foss Manufacturing Company Inc. (manufacturer
                                                  of non-woven fabrics) (for more than five years);
                                                  Director, Ameron International (diversified
                                                  manufacturer) (1994--present).

Richard A. Gilleland.................     52      Director, DePuy International (medical products)
                                                  (July 1996--present); President and Chief
                                                  Executive Officer, AMSCO International, Inc.
                                                  (infection control products) (July 1995--July
                                                  1996); Senior Vice President of Tyco (October
                                                  1994--July 1995); Chairman, President and Chief
                                                  Executive Officer, The Kendall Company (July
                                                  1990--July 1995); Director, Remington Arms
                                                  Company, Inc. (firearms and ammunition) (March
                                                  1994--present); Director, Physicians Resource
                                                  Group (physician practice management services)
                                                  (June 1995--present).
   
Philip M. Hampton....................     63      Co-Managing Director, R.H. Arnold & Co.
                                                  (investment bank) (April 1997--present);
                                                  Chairman of the Board, Metzler Corporation
                                                  (investment bank) (October 1989--March 1997);
                                                  Director and Vice Chairman, Bankers Trust New
                                                  York Corporation (1986--1989).

Frank E. Walsh, Jr...................     55      Chairman, Sandyhill Foundation (charitable
                                                  organization) (August 1996--present); Chairman,
                                                  Wesray Capital Corporation (private investment
                                                  firm) (October 1989--January 1996).
    
</TABLE>

   
Removal of Directors

               The ADT shareholders are being asked to remove all but three of
the persons currently serving as directors of ADT.  The directors of ADT whom
ADT shareholders are being asked to remove are ___________.  Michael A.
Ashcroft, ___________ and ____________, who are currently directors of ADT,
will continue to serve as directors of the Combined Company.  The purpose of
the removal is to create vacancies on the ADT Board that will be filled with
the election of the current Tyco directors, as required by the Merger
Agreement.  The removal of the ADT directors who will not be serving as
directors of the Combined Company has been consented to by each of these
directors.

               The removal of the ADT directors who are not continuing as
directors of the Combined Company, the expansion of the ADT Board to eleven
members and the election of the members of the Tyco Board as directors of the
Combined Company are a condition to the parties' obligation to consummate the
Merger.  See "The Merger Agreement--Conditions to the Merger--Conditions to
Each Party's Obligations to Effect the Merger."  The ADT Board unanimously
recommends that ADT shareholders vote FOR each of these proposals.
    

Directors and Executive Officers

               Set forth below are the names, ages, positions and certain
other information concerning the current directors and executive officers of
ADT and three executive officers of subsidiaries of ADT as at December 31,
1996.

<TABLE>
<CAPTION>
Name                                  Age     Position with ADT
- --------------------------------    ------    -------------------------------------------------------------
<S>                                  <C>      <C>
   
Michael A. Ashcroft                   50      Chairman of the ADT Board; Chief Executive Officer
John E. Danneberg                     50      Director
Raymond A. Gross                      47      Senior Vice President of ADT Security Services, Inc.
Alan B. Henderson                     63      Director
Ronnie G. Lakey                       42      Director of ADT (UK) Holdings PLC
James S. Pasman, Jr.                  66      Director
Michael J. Richardson                 60      President and Chief Executive Officer of ADT Automotive, Inc.
Stephen J. Ruzika                     41      Chief Financial Officer; Executive Vice President; Director
W. Peter Slusser                      67      Director
William W. Stinson                    63      Director
Raymond S. Troubh                     70      Director
    
</TABLE>



               Mr. Ashcroft has been Chairman and Chief Executive Officer of
ADT since 1984 and is Chairman of the Executive Committee.  He was Chairman
and Chief Executive Officer of ADT's predecessor company, Hawley Group PLC,
from 1977 to 1984.  He is the non-executive Chairman of BHI Corporation.

               Mr. Danneberg has been a director of ADT since December 1991
and was previously a director of ADT from 1984 to June 1991.  He has been the
Chief Executive Officer of Sonitrol Corporation since 1996.  He was the
President of Foliage Plant Systems, Inc., an interior landscape contractor,
from 1988 to October 1995.

               Mr. Gross has been a Senior Vice President of ADT Security
Services, Inc. since March 1, 1996.  From August 1993, he was President and
Chief Executive Officer of Alert Centre, Inc., which was acquired by ADT in
December 1995, and prior to that he was President/General Manager of Cellular
One of Ohio from November 1988.

               Mr. Henderson has been a director of ADT since 1992 and is a
member of the Audit and Remuneration Committees.  He is Chairman of Ranger Oil
(UK) Limited, an oil exploration and production company, and has been a
director of Ranger Oil (UK) Limited since 1972.  He is also Chairman of
Abtrust Emerging Economies Investment Trust Plc and Abtrust New Thai
Investment Trust Plc, and is a director of Abtrust New Dawn Investment Trust
Plc, Energy Capital Investment Company PLC and Greenfriar Investment Company
PLC.

               Mr. Lakey has been a director of ADT (UK) Holdings PLC since
its incorporation in 1996.  He has operational responsibility for ADT's
electronic security services operations in Canada and Europe.  He has held
various positions with ADT since joining in 1987.

               Mr. Pasman has been a director of ADT since 1992 and is a
member of the Audit and Remuneration Committees.  He was President and Chief
Operating Officer of National Intergroup, Inc., an industrial holding company,
from 1989 to 1991 and was Chairman and Chief Executive Officer of Kaiser
Aluminum and Chemical Corp., an aluminum and chemical company, from 1987 to
1989.  He is a director of BEA Income Fund, Inc., BEA Strategic Income Fund,
Inc. and BT Insurance Funds Trust.

   
               Mr. Richardson has been the President and Chief Executive
Officer of ADT Automotive, Inc. ("ADT Automotive"), which supervises the
United States vehicle auction services business, since 1982.
    

               Mr. Ruzika has been a director and Executive Vice President of
ADT since 1987, has been Chief Financial Officer since 1989 and President of
ADT Security Services, Inc. since 1996.  He is a member of the Executive
Committee.  He was previously Chief Financial Officer of ADT's United States
operations.  He is also a non-executive director of BHI Corporation.

               Mr. Slusser has been a director of ADT since 1992 and is a
member of the Audit and Remuneration Committees.  He has been the President of
Slusser Associates, Inc., a private investment banking firm in New York City,
since 1988 and was previously a managing director and head of mergers and
acquisitions at PaineWebber Incorporated.  He is a director of Ampex
Corporation, a leading producer of high performance television and data
storage recording systems.

               Mr. Stinson has been a director of ADT since 1991.  He retired
as Chairman and Chief Executive Officer of Canadian Pacific Limited in 1996
after serving as Chief Executive Officer for 11 years.  He remains a director
of that company.  He is also a director of Laidlaw, Inc., Western Star Trucks
Inc., Sun Life Assurance Company of Canada, and a number of other corporations.

   
               Mr. Troubh has been a director of ADT since 1991 and is a
member of the Audit and Remuneration Committees.  He has been an independent
financial consultant since 1974.  He is a director of America West Airlines,
Inc., ARIAD Pharmaceuticals, Inc., Becton, Dickinson and Company, Diamond
Offshore Drilling, Inc., Foundation Health Systems, Inc., General American
Investors Company, Inc., Olsten Corporation, Petrie Stores Corporation, Time
Warner Inc., Triarc Companies, Inc. and WHX Corporation.

               Each director is currently serving a term which expires at the
next annual general meeting.  Under the ADT Bye-Laws, no person other than a
director retiring at a general meeting of ADT shall, unless recommended by the
directors, be eligible for election to the office of director unless, between
six and 28 days before the meeting date, the Secretary of ADT has been given,
by a shareholder of ADT (other than the person to be proposed) entitled to
attend and vote at the meeting for which such notice is given, written notice
of his intention to propose such person for election and also written notice,
signed by the person to be proposed, of his willingness to be elected. The ADT
Board is recommending the current directors of Tyco for election to the ADT
Board.  A director may hold any other office or position of profit under ADT
(other than the office of Auditor) in conjunction with this office of director
for such period and on such terms as ADT may from time to time determine in
general meeting.
    

               Meetings and Committees of the ADT Board.  During 1996, there
were eleven meetings of the ADT Board.  All directors attended at least 75 per
cent of the meetings of the ADT Board and of the committees of which they were
members.

               The ADT Board has several committees, including an Audit
Committee and a Remuneration Committee.  The Audit Committee, formed in 1991,
and the Remuneration Committee, formed in 1992, each consist entirely of
independent directors who are Messrs. Henderson, Pasman, Slusser and Troubh.
During 1996, there were four meetings of the Audit Committee and four meetings
of the Remuneration Committee.  The function of the Audit Committee is to
review the services performed by ADT's independent accountants and to review
and act or report to the ADT Board with respect to the scope of audit
procedures and accounting practices.  The function of the Remuneration
Committee is to review and approve compensation and other employment benefits
afforded certain executive officers.  ADT has no standing nominating committee.

               Compensation of Directors.  Directors who are not employees of
ADT are paid an annual director's fee of $25,000 each and are reimbursed for
reasonable and customary travel and other expenses incurred in performing
their duties.  In addition, Messrs. Henderson, Pasman, Slusser and Troubh are
each paid an annual sum of $15,000 for their services on the Audit and
Remuneration Committees.

Security Ownership of Certain Beneficial Owners of ADT and ADT Management

   
              The following table sets forth certain information, with
respect to beneficial ownership (determined in accordance with Rule 13d-3
under the Exchange Act) of ADT Common Shares by any person known by ADT to
beneficially own more than five per cent of the outstanding ADT Common
Shares (i) as at May 2, 1997 by FMR Corp.  ("FMR");  (ii) as at March
17, 1996 by WCI and (iii) as at May 7, 1997 by (a) all directors of
ADT, (b) the named directors and officers of ADT, including three executive
officers of subsidiaries of ADT and (c) all directors and executive
officers of ADT as a group.
    

<TABLE>
<CAPTION>
                                                                                   Number of
Name of Beneficial Owner                                                       ADT Common Shares              % of
or Identity of Group                                                       Beneficially Owned(1), (2)        Class(3)
- -------------------------------------------------------------------        --------------------------        --------
<S>                                                                       <C>                             <C>
Westar Capital, Inc. (4)                                                                    38,287,111          24.9%
 818 Kansas Avenue
 Topeka, Kansas 66601
FMR Corp.(5)                                                                                13,010,514           8.3%
 82 Devonshire Street
 Boston, Massachusetts 02109
M.A. Ashcroft(6)                                                                            11,525,718           7.0%
J.E. Danneberg                                                                                     102             *
R.A. Gross                                                                                       2,000             *
A.B. Henderson                                                                                     621             *
R.G. Lakey                                                                                      25,000             *
J.S. Pasman, Jr.                                                                                 2,000             *
M.J. Richardson                                                                                327,837             *
S.J. Ruzika                                                                                  1,307,407             *
W.P. Slusser                                                                                     2,800             *
W.W. Stinson                                                                                     3,010             *
R.S. Troubh                                                                                      2,500             *
All directors and executive officers as a group, 11 persons(7)                              13,198,995           8.0%

</TABLE>

- ------------
*  less than 1%

(1) Includes ADT Common Shares which may be acquired upon exercise of the
    following number of options to purchase ADT Common Shares from ADT
    exercisable on or within 60 days of May 7, 1997 beneficially owned by
    the following persons:  M.A. Ashcroft, 10,150,000; R.A. Gross, nil; R.G.
    Lakey, 25,000; M.J. Richardson, 315,000 and S.J. Ruzika, 1,291,665.

(2) For purposes of this table, a person or group of persons is deemed to have
    "beneficial ownership" of any ADT Common Shares which such person has the
    right to acquire on or within 60 days after May 7, 1997.  For purposes
    of computing the percentage of outstanding ADT Common Shares held by each
    person or group of persons named above, any security which such person or
    persons has or have the right to acquire on or within 60 days after May
    7, 1997 is deemed to be outstanding, but is not deemed to be outstanding
    for the purpose of computing the percentage ownership of any other person.

(3) Based upon ADT Common Shares outstanding on May 7, 1997, but excluding
    3,182,787 ADT Common Shares owned by a subsidiary of ADT.

(4) ADT has received an Amendment No. 10 to Schedule 13D dated March 17, 1997
    filed with the SEC by WCI, a wholly owned subsidiary of Western Resources
    Inc., in respect of ownership of 38,287,111 ADT Common Shares.  ADT has not
    attempted to verify independently any of the information contained in the
    Schedule 13D.

(5)  ADT has received a notification dated May 2, 1997 from FMR in respect
    of ownership of 13,010,514 ADT Common Shares by accounts under the
    discretionary investment management of its wholly owned subsidiaries
    Fidelity Management & Research Company and Fidelity Management Trust
    Company.  ADT has not attempted to independently verify any of the
    information provided by FMR.

(6) The number of ADT Common Shares beneficially owned by Mr.  Ashcroft
    includes 718 ADT Common Shares owned by Mr.  Ashcroft's wife.  On April
    4, 1997, Mr.  Ashcroft transferred 9,000,000 shares, comprised of
    8,000,000 options and 1,000,000 ADT Common Shares, beneficially owned by
    him and included in the table, representing 5.6% of the ADT Common
    Shares outstanding as of May 7, 1997, to an irrevocable trust of
    which Mr.  Ashcroft and his family are beneficiaries.

(7) The address for these officers and directors is the address of ADT.

   
Security Ownership of Certain Beneficial Owners of Tyco and Tyco Management

               The following table sets forth, as of May 7, 1997 (except as
otherwise indicated), the beneficial ownership of Tyco Common Shares by (i)
those persons known by Tyco to own beneficially more than 5% of the
outstanding Tyco Common Shares: (ii) all directors of Tyco, each of the
executive officers named under "Executive Compensation" in Tyco's Proxy
Statement for its 1996 Annual Meeting of Shareholders dated September 20,
1996; and (iii) all directors and officers of Tyco as a group.
    

<TABLE>
<CAPTION>
                                                                 Number of  Tyco
Name of Beneficial Owner                                          Common Shares
or Identity of Group                                           Beneficially Owned(1)       % of Class
- -------------------------------------------------------        ---------------------       ----------

<S>                                                           <C>                            <C>
FMR Corp.(2)                                                       23,292,204                  14.0%
  82 Devonshire Street
  Boston, Massachusetts 02109
L. Dennis Kozlowski(3)                                              1,010,058                     *
Joshua M. Berman                                                       36,000                     *
Richard S. Bodman                                                      12,596                     *
John F. Fort, III                                                      79,543                     *
Stephen W. Foss                                                        28,513                     *
Richard A. Gilleland                                                    2,302                     *
Philip M. Hampton                                                      25,000                     *
Frank E. Walsh, Jr.                                                    51,497                     *
Jerry R. Boggess(4)                                                    55,468                     *
Robert P. Mead(5)                                                     104,986                     *
Richard J. Meelia (6)                                                  82,938                     *
Mark H. Swartz(7)                                                     225,226                     *
All directors and officers as a group (15 persons)                  1,925,750                   1.2%


<FN>
- ------------
*  less than 1%

(1) The amounts shown are amounts owned beneficially as of May 7, 1997
    (except for FMR, where the amount is as of December 31, 1996), based on
    information furnished by the persons named.  For purposes hereof, a person
    is deemed to be the beneficial owner of shares if such person, either
    alone or with others, had the power to vote or to dispose of such
    shares.

(2) In a Schedule 13G, with information as of December 31, 1996, FMR reported
    that such shares were not acquired for the purpose of acquiring or
    influencing control of Tyco and that it has sole dispositive power over
    23,292,204 shares and sole voting power over 1,267,014 shares.

(3) The amount shown includes 338,000 Tyco Common Shares awarded to Mr.
    Kozlowski under Tyco's 1994 Restricted Stock Plan on which restrictions
    have not yet lapsed.

(4) Includes 15,000 shares awarded to Mr. Boggess under Tyco's 1983 Restricted
    Stock Plan for Key Employees on which restrictions have not yet lapsed.

(5) Includes 20,534 shares awarded to Mr. Mead under the 1994 Restricted Stock
    Plan on which restrictions have not yet lapsed.

(6) Includes 50,858 shares awarded to Mr. Meelia under the 1994 Restricted
    Stock Plan on which restrictions have not yet lapsed.

(7) Includes 144,000 shares awarded to Mr. Swartz under the 1994 Restricted
    Stock Plan on which restrictions have not yet lapsed.
</TABLE>

   
ADT Executive Compensation
    

               Summary Compensation Table.  Shown below is information
concerning the annual and long-term compensation for services in all
capacities to ADT for the fiscal years ended December 31, 1996, 1995 and 1994,
of those persons who were, at December 31, 1996 (i) the Chief Executive
Officer and (ii) the other four most highly compensated executive officers of
ADT, including three executive officers of subsidiaries of ADT (the "Named
Officers").

<TABLE>
<CAPTION>
                                                                                      Long-Term
                                                                                     Compensation
                                          Annual Compensation(1)                        Awards
                                   ------------------------------------            -----------------
                                                                                        Shares
                                                                                   Underlying Stock         All Other
Name and principal position        Year        Salary         Bonus                     Options            Compensation
- ---------------------------       ------     ----------     ----------             -----------------       ------------
<S>                               <C>       <C>            <C>                         <C>                <C>
Michael A. Ashcroft(2)             1996      $1,143,844     $2,344,880                    5,000,000        $1,330,380(3)
Chairman of the ADT Board;         1995      $1,089,375     $2,233,219                    1,500,000        $1,921,939
Chief Executive Officer            1994      $1,037,500     $1,945,313                      750,000          $783,403

Raymond A. Gross                   1996      $183,353(4)       $82,500                      100,000               -0-
Senior Vice President of ADT       1995             -0-            -0-                          -0-               -0-
Security Services, Inc.            1994             -0-            -0-                          -0-               -0-

Ronnie G. Lakey                    1996        $248,962       $125,000                      100,000           $27,020(5)
Director of ADT (UK) Holdings      1995        $195,866       $140,000                       20,000           $14,822(5)
PLC                                1994        $188,827       $135,000                       25,000           $14,138(5)

Michael J. Richardson(6)           1996        $335,000       $222,705                       40,000            $6,461(7)
Chief Executive Officer of ADT     1995        $314,000       $145,245                       50,000            $6,461(7)
Automotive, Inc.                   1994        $300,000       $115,000                       45,000            $6,480(7)

Stephen J. Ruzika(8)               1996        $686,306     $1,100,000(9)                   208,333           $40,323(10)
Chief Financial Officer;           1995        $653,625       $250,000                      500,000           $37,432(10)
Executive Vice President;          1994        $622,500       $200,000                      250,000           $35,639(10)
Director


<FN>
- ------------
(1) While officers enjoy certain perquisites, such perquisites did not exceed
   the lesser of $50,000 or 10 per cent of each officer's salary and bonus.
   Except as set forth below in "Employment Contracts, Termination of
   Employment and Change in Control Arrangements" and above in "Interest of
   Certain Persons in the Merger," a change in control of ADT does not of
   itself require the payment of any moneys to any of the Named Officers.
   However, such an event does accelerate the vesting of certain pension
   rights and the exercisability of certain stock options.

(2) The salary, bonus and all other compensation shown in respect of 1994 and
   1995 represent Mr. Ashcroft's entitlement to those amounts.  Mr. Ashcroft
   utilized $2,500,000 of the compensation due to him for 1995, being the
   whole of his bonus entitlement of $2,233,219 and $266,781 of his other
   compensation to subscribe for options, at the rate of $2.50 per option, to
   subscribe for ADT Common Shares.  Mr. Ashcroft also utilized $2,500,000 of
   the compensation due to him for 1994, being the whole of his bonus
   entitlement of $1,945,313 and $554,687 of his other compensation
   entitlement, to subscribe for these options.

(3) The other compensation due to Mr. Ashcroft in respect of 1996 represents
   the US dollar equivalent of Pound Sterling851,344, being an amount in lieu
   of providing Mr. Ashcroft with retirement and death benefits under a
   defined pension plan.  The amounts in respect of 1995 and 1994, a portion
   of which are referred to in note (2) above, were the equivalents of  Pound
   Sterling1,217,341 and  Pound Sterling511,126, respectively.

(4) Represents salary since joining ADT Security in March 1996.  Mr. Gross's
   annualized salary for 1996 was $220,000.

(5) Represents $27,020, $14,822, and $14,138 for the amount contributed to Mr.
   Lakey's retirement income plan for 1996, 1995 and 1994, respectively.

(6) The salary amount shown for 1996 represents Mr. Richardson's entitlement
   to salary in the year.  Prior to becoming entitled to receive certain
   salary, however, Mr. Richardson elected to receive options at the rate of
   $2.50 per option, to subscribe for ADT Common Shares at an exercise price
   of $8.625 per share, in lieu of receiving $69,444, $83,333 and $97,222 in
   salary in 1996, 1995 and 1994, respectively.

(7) Represents $4,500 contributed for 1996, 1995 and 1994 to a defined
   contribution 401(k) pension benefit plan, and $1,961, $1,961 and $1,980 for
   1996, 1995 and 1994, respectively, which is the aggregate incremental cost
   to ADT of providing Mr. Richardson with enhanced group term life insurance
   benefits.

(8) The salary amount shown for 1996 represents Mr. Ruzika's entitlement to
   salary in the year.  Prior to becoming entitled to receive certain salary,
   however, Mr. Ruzika elected to receive options at the rate of $2.50 per
   option, to subscribe for ADT Common Shares at an exercise price of $8.625
   per share, in lieu of receiving $80,136, $104,167 and $128, 198 in salary
   in 1996, 1995 and 1994, respectively.

(9) Mr. Ruzika earned a bonus for 1996 of $1,100,000 (1995 - $250,000) under a
   bonus arrangement by which payments are related directly to the performance
   of the ADT Common Share price.

(10) Represents $37,639, $35,777 and $34,003 contributed to Mr. Ruzika's
   retirement income plan in 1996, 1995 and 1994, respectively, and $2,684,
   $1,655 and $1,636 for 1996, 1995 and 1994, respectively, which is the
   estimated aggregate incremental cost to ADT of providing Mr. Ruzika with
   supplemental term life insurance.
</TABLE>

   Option Grants in Last Fiscal Year.  Shown below are all grants of share
   options to the Named Officers during the fiscal year ended December 31,
   1996.  The following table shows, along with certain information,
   hypothetical realizable values of share options granted for the last
   fiscal year, at assumed rates of cumulative share price appreciation
   over the ten-year life of such options.  These assumed rates of
   appreciation are set by the rules of the SEC and are not intended to
   forecast appreciation of the price of the ADT Common Shares.  These
   hypothetical values have not been discounted to reflect their present
   values.

<TABLE>
<CAPTION>
                                                                                                        Potential Realizable Value
                                                                                                         at Assumed Annual Rates
                                                                                                       of Share Price Appreciation
                                                       Individual Grants                                    for Option Term(2)
                         --------------------------------------------------------------------------    ---------------------------
                                        % of Total                         Exercise
                                      Options Granted    Market Price        or
                         Options       to Employees         on           Base Price
Name                    Granted(1)    in Fiscal Year   Date of Grant     ($/share)  Expiration Date        5%              10%
- ----------------------  ----------   ---------------   -------------     ---------  ---------------    -----------     -----------
<S>                     <C>          <C>                  <C>                 <C>          <C>               <C>              <C>
Michael A. Ashcroft      5,000,000         78.3%          $14.75          $15.00      Aug 4, 2003      $30,968,000     $74,713,000
Raymond A. Gross           100,000          1.6%          $16.375         $16.50      May 6, 2006       $1,017,000      $2,597,000
Ronnie G. Lakey            100,000          1.6%          $16.375         $16.50      May 6, 2006       $1,017,000      $2,597,000
Michael J. Richardson       40,000          0.6%          $16.375         $16.50      May 6, 2006         $407,000      $1,039,000
Stephen J. Ruzika          208,333          3.3%          $14.75          $15.00     April 29, 2004     $1,452,000      $3,567,000
</TABLE>


(1) The options granted to Mr. Ashcroft and Mr. Ruzika represent the net
   increase in the number of options which were received by Mr. Ashcroft and
   Mr. Ruzika in connection with an amendment to previously granted options on
   3,000,000 and 125,000 ADT Common Shares, respectively.  At the same time as
   the number of options was increased, the exercise price was also increased
   from $8.625 to $15.00.  All the other terms and conditions of the options,
   including the expiry dates, remained unchanged.  All of these options are
   currently exercisable.

   Of the options granted to Mr. Gross, Mr. Lakey and Mr. Richardson, 50 per
   cent are exercisable after three years from the date of grant, 25 per cent
   are exercisable after four years from the date of grant and 25 per cent are
   exercisable after five years from the date of grant.  See "The Merger
   Agreement--Certain Covenants--Certain Employee Benefits Matters."

(2) Gains are reported net of the option exercise price but before taxes
   associated with exercise.  Mr. Ashcroft and Mr. Ruzika have paid a
   subscription price for these options of $2.50 per option.  Accordingly, for
   the purpose of calculating the potential realizable value, $2.50 has been
   added to the exercise price.  The amounts shown represent certain assumed
   rates of appreciation only.  Actual gains, if any, on option exercises are
   dependent on the future price performance of the ADT Common Shares as well
   as the option holders' continued employment through the vesting period.
   The potential realizable values reflected in this table may not necessarily
   be achieved.

               Aggregate Option Exercises in Last Fiscal Year and Year-End
Option Values.  Shown below is information with respect to aggregate option
exercises by the Named Officers in the fiscal year ended December 31, 1996 and
with respect to unexercised options to purchase ADT Common Shares granted in
fiscal 1996 and prior years to the Named Officers and held by them at December
31, 1996.

<TABLE>
<CAPTION>                                                                     Number of Unexercised
                          Shares Acquired on       Value Realized on        Options at Fiscal Year End
                        Exercise of Options in   Exercise of Options in    -----------------------------
Name                         Fiscal Year              Fiscal Year          Exercisable     Unexercisable
- ---------------------   -----------------------  -----------------------   -----------     -------------
<S>                     <C>                     <C>                      <C>              <C>
Michael A. Ashcroft            825,000               $6,626,250            9,700,000       1,550,000
Raymond A. Gross                   -0-                      -0-                  -0-         100,000
Ronnie G. Lakey                 32,000                 $256,016               15,000         145,000
Michael J. Richardson           45,000                 $318,125              270,000         135,000
Stephen J. Ruzika               12,000                  $54,900            1,141,663         516,670



(continued)
                             Value of Unexercised In-the-Money
                              Options at Fiscal Year End(1)(2)
                             ---------------------------------
Name                           Exercisable      Unexercisable
- ---------------------          -----------      -------------
<S>                         <C>                 <C>
Michael A. Ashcroft            $78,437,190        $17,493,125
Raymond A. Gross                       -0-           $637,500
Ronnie G. Lakey                   $208,125         $1,209,375
Michael J. Richardson           $3,496,750         $1,441,875
Stephen J. Ruzika              $12,951,731         $5,831,080

</TABLE>

(1) Based on the closing price of $22.875 per ADT Common Share on December 31,
   1996.

(2) Messrs. Ashcroft, Richardson and Ruzika have been granted certain options
   for which they have paid a subscription price of $2.50 per option which has
   been taken into account for the purpose of valuing these options.


               Certain Defined Benefit Plans.  ADT does not maintain any
defined benefit or actuarial retirement plans ("pension plans"). However, Mr.
Lakey, Mr. Richardson and Mr. Ruzika participate in pension plans that are
maintained by indirect, wholly owned subsidiaries of ADT.  Certain information
is set forth below regarding the pension plans in which Mr. Lakey, Mr.
Richardson and Mr. Ruzika, as well as other employees of ADT's subsidiaries,
participate.

   
               Mr. Richardson is a participant in the pension plan maintained
by ADT Group PLC (the "ADT Group Plan"). Mr. Richardson is the only Named
Officer who participates in the ADT Group Plan.  The ADT Group Plan provides
Mr. Richardson an annual benefit payable for life beginning at age 60.  The
annual benefit is equal to 66.7 per cent of base salary for the three years of
the most recent ten years prior to retirement that produce the highest
average.  Mr. Richardson's annual benefit payable at age 60 for life is  Pound
Sterling146,095.  Since Mr. Richardson has already attained age 60, the
benefit payable to him upon his actual retirement will be adjusted based upon
his actual retirement date.  Benefits payable under the ADT Group Plan are not
offset by Social Security benefits.
    

               ADT, Inc. maintains an ADT SERP.  Mr. Lakey and Mr. Ruzika are
the only Named Officers who participate in the ADT SERP.  Benefits for Mr.
Ruzika under the ADT SERP are also supplemented under the Supplemental Benefit
Agreement.

               The ADT SERP provides benefits to Mr. Lakey for a total of 20
years, beginning at age 60.  This annual benefit is equal to 60 per cent of
Mr. Lakey's base salary for the three consecutive years that produce the
highest average.  This benefit is reduced by the value of any benefits derived
from employer contributions under any other retirement plan maintained by ADT,
Inc. or its affiliates.  Mr. Lakey's estimated annual benefit payable at age
60 for a total of 20 years, net of the estimated offset attributable to
employer contributions under certain defined contribution plans, is $30,764.
The estimated offset is based on the assumption that Mr. Lakey will have 27
years of service at age 60.  Benefits are not offset by Social Security
benefits.

               The ADT SERP and Supplemental Benefit Agreement together
provide benefits payable to Mr. Ruzika for a total of 20 years beginning at
age 55.  This annual benefit is equal to 65 per cent of base salary and bonuses
for the three consecutive years that produce the highest average.  Effective
for benefits accrued after December 31, 1994, the benefit is calculated using
base salary including, for this purpose, the purchase price of any options to
purchase ADT's shares received in lieu of base salary.  This benefit is
reduced by the value of any benefits derived from employer contributions under
any other retirement plan maintained by ADT, Inc. or its affiliates.

               Mr. Ruzika's estimated annual benefit payable at age 55 for a
total of 20 years, net of the estimated offset attributable to employer
contributions under certain defined contribution plans, is $361,802.  The
estimated offset is based upon the assumption that Mr. Ruzika will have 28
years of service at age 55.  Benefits are not offset by Social Security
benefits.

               For a discussion of certain change of control provisions in the
ADT SERP, see "--Employment Contracts, Termination of Employment and Change in
Control Arrangements."

               Compliance with Reporting Requirements.  ADT believes that,
during 1996, all filing requirements under Section 16(a) of the Exchange Act
applicable to its officers, directors and beneficial owners of more than 10
per cent of equity securities were complied with on a timely basis.

   
               Employment Contracts, Termination of Employment and Change in
Control Arrangements. ADT has entered into a written employment agreement with
Mr. Ashcroft, dated as of May 8, 1993.  An amendment to the agreement was
approved on November 4, 1996, which provides that Mr. Ashcroft shall serve as
Chairman of the ADT Board and Chief Executive Officer until March 31, 2000,
subject to renewal for additional two-year terms thereafter.  Mr. Ashcroft's
initial base salary was $1,000,000 per annum subject to annual review and
adjustment by the ADT Board but may only be reduced by a maximum of 15 per
cent during the term of the agreement without Mr. Ashcroft's consent.  During
1996, Mr. Ashcroft's base salary was increased to $1,157,625 per annum.  Mr.
Ashcroft is also eligible for annual bonus payments based upon an
earnings-per-share target for the ADT Common Shares set each year, subject to
a maximum bonus of $4,000,000.  The maximum bonus is payable upon attaining
117.5 per cent of the targeted earnings per share.  As a term of the contract,
Mr. Ashcroft was granted options to purchase 1,000,000 ADT Common Shares under
the ADT 1993 Long Term Incentive Plan, with 50 per cent of such options
exercisable at market value on the date of grant, as defined, 25 per cent
exercisable at 110 per cent of market value, and 25 per cent exercisable at
120 per cent of market value, vesting in equal annual installments over a
three-year period commencing one year from the date of grant and exercisable
over a ten-year period.  ADT will make annual payments to Mr. Ashcroft
calculated to provide him with retirement and death benefits no less favorable
than if he were a member of the ADT Group Plan.  Such annual payments will not
be less than $450,000.  ADT may terminate the agreement upon Mr. Ashcroft's
death, when Mr. Ashcroft attains the age of 60, if Mr. Ashcroft is unable to
perform his duties for 180 days due to ill heath, accident or otherwise, if
Mr. Ashcroft fails to discharge his duties or engages in conduct that is
materially injurious to ADT, or if Mr. Ashcroft willfully and continually
commits a material breach of the agreement.  Mr. Ashcroft may terminate the
agreement upon, among other reasons, a breach by ADT which breach (except for
a material breach) is not cured within 30 days, if he is removed from his
position as Chairman of the ADT Board or his position as Chief Executive
Officer, or if the scope of his duties and responsibilities becomes
inconsistent with his position as an officer of ADT.
    

               Mr. Ashcroft may also terminate the agreement without cause at
any time upon 90 days' notice.  In the event the agreement is terminated
pursuant to its terms by ADT or without cause by Mr. Ashcroft upon 90 days'
notice, Mr. Ashcroft will be entitled to the pro rata portion of his base
salary, bonus payment, pension payment and other benefits but will not be
entitled to any additional payments.  If the agreement is terminated due to a
disability, Mr. Ashcroft will be entitled to an additional payment equal to
two times his highest base salary.  In the event the agreement is terminated
by ADT without cause or by Mr. Ashcroft with cause, Mr. Ashcroft will be
entitled to a severance payment equal to two times his highest base salary and
average bonus payment, annual pension payments for the year of termination and
the following two years, and one year of any other benefits previously
provided.

   
               Mr. Ruzika entered into an employment agreement with ADT as of
February 26, 1997. The agreement provides that Mr. Ruzika will serve as Chief
Financial Officer of ADT and as President of ADT Security, ADT Operations and
ADT, Inc., subsidiaries of ADT, from March 1, 1997 until February 28, 1999,
subject to renewal for additional two-year terms thereafter.  Mr. Ruzika's
initial annual base salary will be $694,500 and will be subject to annual
review for possible adjustments.  Mr. Ruzika will also be eligible for annual
bonus payments at the discretion of ADT as well as other compensation and
benefit plans of ADT including stock option plans.  The termination provisions
of this agreement provide that in the event that agreement is terminated by
ADT without cause or by Mr. Ruzika with cause, Mr. Ruzika will be entitled to
receive a severance payment equal to twice his base salary, bonus and certain
fringe benefits.

               Mr. Lakey entered into an employment agreement with ADT, Inc.
as of January 16, 1997. The agreement provides that Mr. Lakey will have
operational responsibility for ADT's electronic security services operations
in Canada and Europe from January 16, 1997 until December 31, 1999, subject to
renewal for additional two-year terms thereafter.  Mr. Lakey's initial annual
base salary will be $265,000.  Mr. Lakey will also be eligible for annual
bonus payments at the discretion of ADT as well as certain other enumerated
benefits and relocation expenses.  The termination provisions of this
agreement include a term to the effect that, in the event that the agreement
is terminated by ADT without cause or by Mr. Lakey with cause, Mr. Lakey will
be entitled to receive his base salary and certain fringe benefits for two
years.

               Under the ADT SERP (and, in the case of Mr. Ruzika, the
Supplemental Benefit Agreement), Mr. Ruzika and Mr. Lakey become fully vested
in the accrued benefits thereunder upon a Change in Control (as defined below)
of ADT or ADT, Inc.  Mr. Ruzika also becomes fully vested upon a Change in
Control (as defined below) of ADT Management Services Limited.  If Mr.
Ruzika's or Mr. Lakey's employment is terminated within one year from the date
of a Change in Control, the terminated executive will receive, in lieu of all
other amounts due to him under the ADT SERP (and, in Mr. Ruzika's case, the
Supplemental Benefit Agreement), a lump-sum distribution equal to the present
value of his accrued benefit and an additional amount calculated under a
formula intended to put him in the same after-tax position that he would have
been in if he had received a lump-sum distribution of his accrued benefit on
his normal retirement date.  Under this formula Mr. Ruzika would currently
receive an additional amount of approximately $653,295 and Mr. Lakey would
currently receive an additional amount of approximately $54,253.
    

               A "Change in Control" is deemed to have occurred under the ADT
SERP if : (1) any person (other than Laidlaw, Inc. or its affiliates,
collectively the "Laidlaw Group") acquires more than 40 per cent of ADT's
voting stock (the triggering percentage has been reduced from 40 per cent to
35 per cent because the Laidlaw Group's beneficial ownership of ADT's voting
stock is less than 20 per cent); (2) the Laidlaw Group becomes the beneficial
owner of more than 45 per cent of ADT's outstanding voting stock; (3) there is
a change of 50 per cent or more in the composition of ADT's directors during
any 3-year period (unless the change in directors was approved by two thirds
of the directors in office at the beginning of such 3-year period or directors
who had previously been elected with the requisite two thirds approval); (4) a
person acquires the legal right to direct the management and policies of ADT
(other than by virtue of membership on the ADT Board or a committee of the ADT
Board); (5) ADT ceases to own, directly or indirectly through subsidiaries,
at least 80 per cent of the voting stock of ADT, Inc. or (6) the shareholders
of either ADT or ADT, Inc. approve a merger, consolidation or a sale or
disposition of all, or substantially all, of the assets of ADT or ADT, Inc. as
the case may be, with the relevant company not surviving.  In the case of Mr.
Ruzika, the provisions of (4), (5), and (6) above include a change in the
ownership of ADT Management Services Limited (as well as ADT or ADT, Inc.).

               Mr. Richardson entered into an employment agreement with ADT
Automotive Holdings, the corporate parent of ADT Automotive, as of November
30, 1993.  The agreement provides that Mr. Richardson will serve as Chief
Executive Officer of ADT Automotive Holdings and its subsidiaries from
December 1, 1993 until July 31, 1996, subject to renewal for additional
one-year terms thereafter.  The agreement was renewed on a year-to-year basis
as of July 31, 1996.  The agreement provides that the term will be extended
for an additional one year period thereafter unless either ADT Automotive
Holdings or Mr. Richardson shall have given the other notice of intention not
to extend the term six months prior to July 31, 1997.  On January 29, 1997,
ADT Automotive Holdings and Mr. Richardson entered into an agreement which
provides that Mr. Richardson's time to give such notice is extended to and
including April 30, 1997.  Mr. Richardson's initial annual base salary will be
$300,000 and will be subject to annual review for possible increases.  Mr.
Richardson will also be eligible for annual bonus payments at the discretion
of ADT.  The termination provisions of this agreement include a term to the
effect that, in the event that the agreement is terminated by ADT Automotive
Holdings without cause or by Mr. Richardson with cause, Mr. Richardson will be
entitled to receive his base salary and certain fringe benefits for two years
or the remaining term of the agreement, whichever is longer.

   
               The Remuneration Committee of the ADT Board (the "Remuneration
Committee") has considered the recommendations of ADT's outside independent
human resources consultants, and has reviewed industry practices concerning
change in control severance benefits.  In view of the need to minimize employee
distractions and to retain employee loyalty and dedication to ADT and to
assure attention to ADT's performance pending resolution of the Western Offer,
on February 27, 1997, on the recommendation of the Remuneration Committee, the
ADT Board unanimously approved a severance agreement between Mr. Gross and ADT
Security in the event of a change of control, which severance arrangement it
has determined is fair and consistent with industry practices.  The agreement
provides that in the event that there is a "Severance Change in Control" (as
defined below) of ADT prior to February 9, 2000, and either (x) Mr. Gross's
employment is terminated without cause or (y) Mr. Gross terminates his
employment for good reason, Mr. Gross shall be entitled to (a) an amount of
severance pay equal to twice the total of (i) the higher of his annual full
base salary as of the date of termination or as of the date of the Severance
Change in Control, calculated on an annualized basis, plus (ii) the amount of
the bonus awarded to Mr. Gross, if any, in the year prior to the date of
termination and (b) for the twelve-month period following such termination,
benefits substantially similar to the higher of those which Mr. Gross is
receiving immediately prior to the date of termination or as of the date of
the Severance Change in Control.  A "Severance Change in Control" is deemed to
have occurred under the severance agreement if:  (1) any person becomes the
beneficial owner of more than 50 per cent of ADT's then-outstanding voting
securities; (2) there is a change of 50 per cent or more in the composition of
ADT's directors during the term of the agreement (unless the change in
directors was approved by two thirds of the directors in office at the
beginning of such term or directors who had previously been elected with the
requisite two thirds approval); (3) a person acquires the legal right to
direct the management and policies of ADT (other than by virtue of membership
on the ADT Board or a committee of the ADT Board); or (4) the shareholders of
ADT approve a merger, consolidation or a sale or disposition of all, or
substantially all, of the assets of ADT in which ADT is not the surviving
entity.

               In 1996,  the Remuneration Committee resolved to increase the
subscription price and size of certain share options held by Mr. Ashcroft and
Mr. Ruzika.  In 1993, Mr. Ashcroft and Mr. Ruzika were granted options to
subscribe for 3,000,000 and 125,000 ADT Common Shares respectively at an
exercise price of $8.625 per share for which each was required to pay $2.50
per option, representing a total payment of $7,500,000 and $312,500
respectively, as a condition of vesting.  In 1996, the exercise price of these
options was increased to $15 and the number of related shares was increased to
8,000,000 and 333,333 respectively.  All the other material terms and
conditions remained unchanged. These changes were approved by the shareholders
of ADT.  At the time that the Remuneration Committee approved these changes,
the closing price of the ADT Common Shares was $14.75.  In November 1996, the
Remuneration Committee resolved that the options of Mr. Ashcroft be
transferable and, at the same time, in return, Mr. Ashcroft agreed to extend
the termination date of his employment agreement from March 31, 1998 to March
31, 2000.
    

               In November 1996,  the Remuneration Committee also approved a
bonus plan under which Mr. Ruzika is to receive a bonus of $200,000 when the
ADT Common Share price exceeds $21.00 for a continuous period of 30 trading
days and $200,000 each time the ADT Common Share price exceeds by $1.00 for a
continuous period of 30 trading days the share price level at which a bonus
payment was previously made.  The plan is due to expire in 2001 or such
earlier date as the ADT Common Share price exceeds $30.00 for a continuous
period of 30 trading days.  Should the share price exceed $30.00 within two
and one half years, Mr. Ruzika will receive an additional payment of
$1,000,000.

Certain Relationships and Related Transactions

   
               ADT, Inc., a wholly owned subsidiary of ADT, entered into a
consulting agreement with John E. Danneberg, one of ADT's directors, as of
August 28, 1996.  The agreement provides that Mr. Danneberg, as an independent
consultant, will serve as Chief Executive Officer of Sonitrol Corporation
("Franchisor") and certain franchisees of Franchisor owned or acquired by
affiliates of ADT, Inc.  The agreement provides that the initial term of such
engagement shall be for a period of six months commencing on September 1, 1996
and shall be automatically renewed on a month to month basis unless written
notice is given by ADT, Inc. or Mr. Danneberg not to renew the agreement at
least 30 days before the end of such initial term, which notice was not given.
Under the terms of the agreement, ADT, Inc. pays Mr. Danneberg a monthly fee
of $15,000, and Mr. Danneberg is reimbursed directly for all reasonable
out-of-pocket business expenses.
    



   
                  ADT MERGER PROPOSAL ON RECAPITALIZATION

               At the ADT Meeting, ADT shareholders will be asked to approve
the Recapitalization Proposal, as required under the terms of the Merger
Agreement.  The Recapitalization Proposal includes:

               (a) the consolidation and division of the existing ADT Common
      Shares, par value $0.10 per share, into New ADT Common Shares, par value
      $0.20 per share, such that holders of ADT Common Shares outstanding
      immediately before the Effective Time will be entitled to 0.48133
      (subject to adjustment under certain circumstances) of a New ADT Common
      Share for each ADT Common Share then held, all fractional entitlements
      being canceled for cash equal to the value thereof;

               (b) an increase in the authorized share capital of ADT to
      $275,750,000 by the creation of (i) an additional 640,000,000 New ADT
      Common Shares and (ii) a number of New ADT Common Shares equal in
      aggregate nominal value to the aggregate nominal value of fractional
      entitlements canceled as aforesaid, and approval to issue all such
      shares; and

               (c) amendments to the ADT Bye-Laws to reflect the above.
    

               The Reverse Stock Split.  The Reverse Stock Split which
comprises part (a) of the Recapitalization Proposal is required by the Merger
Agreement in order that the Exchange Ratio give effect to the share ownership
of Tyco shareholders and ADT shareholders in the Combined Company, as
contemplated by the Merger Agreement.

   
               Fractional shares arising on the Reverse Stock Split will not
be issued and each ADT shareholder's fractional entitlement will be canceled
in exchange for a cash payment equal to the value of that entitlement.  The
value will be calculated by reference to the closing price of Combined Company
Common Shares on the NYSE on the Effective Date, rounded to the nearest whole
cent. Checks for this amount will be mailed to ADT shareholders within [21]
days of the Merger becoming effective.  Payment will be made in US dollars,
except to those ADT shareholders with registered addresses in the United
Kingdom, who will receive payment in sterling.
    

               The Share Amendment.  ADT currently has authorized 220,000,000
ADT Common Shares, of which 156,901,587 were issued and outstanding as of
May 7, 1997, and 125,750,000 preference shares, of which none are listed
and outstanding.  See "Description of Combined Company Share Capital."

   
               Based on the number of Tyco Common Shares outstanding as of
May 7, 1997, and the number of stock options and Warrants of Tyco
outstanding as of that date, 168,850,000 Combined Company Common Shares will
be required for issuance, or will be required to be reserved for issuance, in
connection with the Merger.  After giving effect to the Reverse Stock Split,
and taking into account 18,581,175 New ADT Common Shares that would be
reserved for issuance under share option and  incentive plans of ADT and the
LYONS, only approximately 15,790,984 authorized New ADT Common Shares would be
available for issuance in connection with the Merger.  Accordingly, up to
153,059,016 additional New ADT Common Shares are required to be authorized for
issuance as Combined Company Common Shares in connection with the Merger, and
the authorization of such additional New ADT Common Shares is required by the
terms of the Merger Agreement.

               In addition, the ADT Board believes that it is desirable to
have available additional authorized New ADT Common Shares for future stock
dividends, employee benefit plans, financings, acquisitions, or other corporate
purposes.  Part (b)(i) of the Recapitalization Proposal therefore requests
that the ADT shareholders approve the creation of a total of 640,000,000 New
ADT Common Shares and the issuance of those shares.  Other than as required
by, or as a result of, the Merger Agreement, ADT has no present plan to issue
the New ADT Common Shares to be authorized.  The Combined Company Board would
have the sole discretion to issue the additional Combined Company Common
Shares from time to time for any corporate purpose without further action by
shareholders, except as may be required by law or stock exchange rules, and
without first offering such shares to shareholders.

               If approved, the Recapitalization Proposal would become
effective immediately prior to the consummation of the Merger.  Approval of
the Recapitalization Proposal by ADT shareholders is a condition to the
parties' obligation to consummate the Merger.  See "The Merger
Agreement--Conditions to the Merger--Conditions to Each Party's Obligations to
Effect the Merger."
    

               The ADT Board unanimously recommends that ADT shareholders vote
FOR the Recapitalization Proposal.

   
                          OTHER ADT MEETING PROPOSALS

               In addition to the ADT Merger Proposals, ADT shareholders are
also being asked, at the ADT Meeting, to vote upon the ADT Bye-Law Amendment
Proposal and the Option and Warrant Proposal.  The ADT Bye-Law Amendment
Proposal will only become effective if the ADT Merger Proposals are approved
by the shareholders of ADT.  The Merger is not conditioned on the Other ADT
Meeting Proposals.

The Option and Warrant Proposal

               Amendment of Long Term Incentive Plan

               In connection with the Merger, the Combined Company intends to
amend its stock incentive plan, the ADT Limited 1993 Long Term Incentive Plan
(as revised, the "Amended Long Term Incentive Plan").  All outstanding ADT or
Combined Company options (other than those granted under ADT's U.K. Executive
Share Option Plan) will be administered under the Amended Long Term Incentive
Plan, including former ADT awards and any former Tyco awards assumed by the
Combined Company pursuant to the Merger Agreement.  In addition, it is
expected that future grants of options and other awards will be made to key
employees and directors of the Combined Company under the Amended Long Term
Incentive Plan.  The shareholders of ADT are being requested to approve the
adoption of the Amended Long Term Incentive Plan.

               Amended Long Term Incentive Plan.  The following summary of the
Amended Long Term Incentive Plan is qualified in its entirety by reference to
the full text of the plan, a copy of which has been filed as an exhibit to
this Joint Proxy Statement/Prospectus.

               The Amended Long Term Incentive Plan provides for the grant of
options, stock appreciation rights and other stock-based awards to officers,
key employees or directors of the Combined Company or its subsidiaries.  The
Amended Long Term Incentive Plan is a discretionary plan and, accordingly, it
is not possible at present to determine the amount or form of any award which
will be available for grant to any individual during the term of the plan.
The maximum number of Combined Company Common Shares which may be granted in
respect of all awards during the term of the Amended Long Term Incentive Plan
is 22 million shares (after giving effect to the Merger and the Reverse Stock
Split), representing approximately nine percent of the Combined Company Common
Shares to be outstanding upon consummation of the Merger and the Reverse Stock
Split.  After providing for existing option commitments, including outstanding
ADT options and Tyco options to be assumed upon consummation of the Merger,
awards with respect to 9.6 million Combined Company Common Shares will be
available for grant under the plan.  The maximum number of shares available
for awards under the plan may be adjusted in the event of certain capital
changes as described below.  Shares related to prior grants that are
forfeited, terminated or canceled, shall again become eligible for grant under
the Amended Long Term Incentive Plan.  As amended, no awards may be issued
under the plan after June 30, 2007.  The maximum number of Combined Company
Common Shares in respect of which awards may be granted to any individual
in a single year under the plan is 3 million shares (after giving effect
to the Merger and the Reverse Stock Split).

               The Amended Long Term Incentive Plan will be administered by a
Remuneration Committee of the Board of Directors of the Combined Company (the
"Remuneration Committee") (or by the Board itself).  Each member of the
Remuneration Committee will be a "non-employee director," within the meaning
of Rule 16b-3 promulgated under the Exchange Act, to the extent necessary to
comply with that Rule.  Under the terms of the Amended Long Term Incentive
Plan, the Remuneration Committee in its sole discretion may grant awards in
such amounts and in such of the forms permitted by the Amended Long Term
Incentive Plan as it deems appropriate.  The permissible forms of awards under
the Amended Long Term Incentive Plan are: stock options (both incentive stock
options and other stock options); stock appreciation rights; performance
awards; dividend equivalent rights; and other stock based grants.  The
material terms and features of the various forms of awards are set forth below.

               Incentive Stock Options - These are stock options that are
granted pursuant to the restrictions of Section 422 of the Code.  Generally,
incentive stock options may not be exercised more than ten years after the date
they are granted and may not have an option price less than 100% of the fair
market value of a Combined Company Common Share on the date they are granted.
Payment of the option price may be made in cash, Combined Company Common
Shares, other property or any combination thereof, as determined by the
Remuneration Committee.

               Other Stock Options - These are options to purchase Combined
Company Common Shares under terms other than those applicable to incentive
stock options.  Such options shall have such terms and conditions as are
established by the Remuneration Committee, except that the exercise price for
such options generally may not be less than the fair market value of a
Combined Company Common Share on the date of grant.  If the award requires
that the option be paid for by the recipient, or if a discounted exercise
price is expressly granted in lieu of a reasonable amount of salary or bonus,
the exercise price may be lower than the fair market value of a Combined
Company Common Share on the date of grant, but may in no event be less than
85% of such fair market value. Payment of the option price may be made in
cash, Combined Company Common Shares or any combination thereof, as determined
by the Remuneration Committee.

               Stock Appreciation Rights - These are rights to receive an
amount equal to the appreciation of Combined Company Common Shares over a
grant price established at the time of award.  The grant price generally may
not be less than the fair market value of a Combined Company Common Share on
the date of grant, except that if the award requires that the stock
appreciation right be paid for by the recipient, or if a discounted grant
price is expressly granted in lieu of a reasonable amount of salary or bonus,
the grant price may be established at not less than 85% of the fair market
value of a Combined Company Common Share on the date of grant.  Stock
appreciation rights shall have such other terms and conditions as are
established by the Remuneration Committee, may be granted in tandem with
options or separately and may be terminated by the Remuneration Committee.

               Performance Awards - These are rights to receive amounts at a
future date based upon the Combined Company's performance during the period
between the date of grant and such future date.  Performance criteria with
respect to which awards may be issued under the Plan include stock price,
market share, sales, earnings, earnings per share, earnings before income
taxes, cash flow and return on equity.  The amount of a performance award may
be denominated or payable in cash, Combined Company Common Shares or other
securities or property.

               Dividend Equivalent Rights - These are rights to receive
payments equal to dividends paid on a number of Combined Company Common Shares
determined by the Renumeration Committee.  The Renumeration Committee may
provide that such payments will be deemed to have been reinvested in
additional Combined Company Common Shares or otherwise reinvested.

               Other Stock-Based Grants - These are awards based on, or
related to, Combined Company Common Shares that do not constitute any of the
awards described above.  Such awards shall have such terms and conditions as
are established by the Remuneration Committee.

               The number and type of shares with respect to which awards may
be made under the Amended Long Term Incentive Plan, the number of Combined
Company Common Shares subject to outstanding options, the exercise price of
options, and the grant price of stock appreciation rights may be adjusted by
the Remuneration Committee in the event of certain corporate transactions or
events, including a dividend, recapitalization, stock split, reorganization,
merger, consolidation, split-up, spin-off, combination, repurchase or exchange
of Combined Company Shares or similar event.  The Committee is also authorized
to make certain adjustments (i) to ensure comparability with the terms of any
awards assumed in connection with a corporate acquisition, (ii) to reflect
certain unusual events such as changes in applicable law or accounting
principles, or (iii) in the event of a "change in control" of the Combined
Company, as defined in the Plan (including, in such event, accelerating the
time of exercise or payment of awards under the Plan).

               The Board may terminate or amend the Amended Long Term
Incentive Plan, except that any such amendment shall require stockholder
approval if (i) the amendment would increase the number of Combined Company
Shares available for awards under the Plan, or (ii) such shareholder approval
is necessary to comply with applicable laws or regulatory requirements.

               Amendment and Substitution of Awards.  After the Merger each
Tyco option will be replaced with a substitute award under the Amended Long
Term Incentive Plan.  See "The Option and Warrant Proposal -- Tyco Stock
Options and Other Rights."  Each such substitute award will be issued with
respect to the same number of Combined Company Common Shares as the number of
Tyco shares to which the original award related, and will have the same
exercise price and same terms and conditions as such original award.

               In addition, effective as of the Merger the terms of each
outstanding option to purchase shares of common stock of ADT will be amended
to reflect the Merger and the Reverse Stock Split.  As amended, each such
option will entitle the recipient to purchase a number of Combined Company
Common Shares equal to the product of .48133 and the number of ADT shares to
which the original award related, and will have an exercise price equal to the
exercise price of such original option divided by .48133.  Other than these
adjustments, the outstanding ADT options will be subject to the same terms and
conditions as applied prior to the Merger.  Except for those options granted
under ADT's U.K. Executive Share Option Plan, all outstanding options to
purchase shares of common stock of ADT will, after the date the Amended Long
Term Incentive Plan is adopted, be administered under the Amended Long Term
Incentive Plan.  It is expected that ADT's Senior Executive Share Option Plan,
US Stock Option Plan 1990 and International Executive Share Option Plan
will be terminated.

               Effect of Plan Amendment in the Event the Merger is not
Consummated.  If the Merger does not occur, the Amended Long Term Incentive
Plan will nonetheless be effective if approved by ADT shareholders, but will
differ from the description given above as follows.  Awards issued under the
Amended Long Term Incentive Plan will in that case continue to be issued with
respect to ADT Common Shares, and the Plan will continue to be administered by
the Remuneration Committee of the ADT Board.  The maximum number of ADT Common
Shares which may in that case be granted to ADT employees in respect of all
awards during the term of the Amended Long Term Incentive Plan will remain
unaltered.  After providing for outstanding ADT options, awards with respect
to 2.6 million ADT Common Shares will be available for grant under the Plan.
In addition, no awards will be issued under the Amended Long Term Incentive
Plan in substitution for Tyco options.  Finally, if the Merger does not occur,
prior outstanding options to purchase ADT Common Shares will not be modified
as described in the previous paragraph, except that all such options other
than those granted under ADT's U.K. Executive Share Option Plan will
henceforth be administered under the Amended Long Term Incentive Plan.

               Tax Treatment

               The following is a brief summary of the U.S. Federal income tax
rules currently generally applicable to stock options granted under the
Amended Long Term Incentive Plan.  In the event the Merger is not consummated,
the following should be read substituting "ADT" for "the Combined Company."

               The grant of an incentive stock option will have no immediate
tax consequences to the optionee or to the Combined Company. The exercise of
an incentive stock option by the payment of cash to the Combined Company will
generally have no immediate tax consequences to the optionee (except to the
extent it is an adjustment in computing alternative minimum taxable income) or
to the Combined Company. If an optionee holds the shares acquired pursuant to
the exercise of an incentive stock option for the required holding period, the
optionee generally will realize long-term capital gain or long-term capital
loss upon a subsequent sale of the shares in the amount of the difference
between the amount realized upon the sale and the purchase price of the shares
(i.e., the exercise price). In such a case, no deduction will be allowable to
the Combined Company in connection with the grant or exercise of the incentive
stock option or the sale of Combined Company Common Shares acquired pursuant
to such exercise.

               If, however, an optionee disposes of the shares prior to the
expiration of the required holding period (a "disqualifying disposition"), the
optionee will recognize ordinary income (and the Combined Company will be
entitled to a deduction) equal to the excess of the fair market value of the
Shares on the date of exercise (or the proceeds of the disposition, if less)
over the exercise price.  Special rules apply in the event all or a portion of
the exercise price is paid in the form of stock.

               The grant of a stock option other than an incentive stock
option (a "non-qualified stock option") will have no immediate tax
consequences to the optionee or to the Combined Company. Upon the exercise of
a non-qualified stock option, the optionee will recognize ordinary income (and
the Combined Company will be entitled to a deduction) in an amount equal to
the excess of the fair market value of the Combined Company Common Shares on
the date of the exercise of the option over the exercise price. The optionee's
tax basis in the shares will be the exercise price plus the amount of ordinary
income recognized by the optionee, and the optionee's holding period will
commence on the date the shares are transferred. Special rules apply in the
event all or a portion of the exercise price is paid in the form of stock.
Other special rules may also apply to a participant who is subject to Section
16 of the Exchange Act.

               Upon a subsequent sale of Shares acquired pursuant to the
exercise of a non-qualified stock option, any difference between the
optionee's tax basis in the shares and the amount realized on the sale is
treated as long-term or short-term capital gain or loss, depending on the
holding period of the shares.

               Certain limitations apply to the Combined Company's deduction
of compensation payable to the person serving as its Chief Executive Officer
or to any of its four other most highly compensated executives in office as of
the end of the year in which such compensation would otherwise be deductible.
In general, the Combined Company may not deduct compensation, other than
"performance-based" compensation, payable to such an executive in excess of $1
million for any year.  It is expected that most awards granted under the
Amended Long Term Incentive Plan will qualify as performance-based
compensation and hence will be fully deductible.  Nonetheless, the Combined
Company will weigh the benefits of compliance with Section 162(m) against the
burdens thereof, and reserves the right to pay compensation that may not be
fully deductible if it is determined to be in the Combined Company's interest
to do so.

               Ratification of Outstanding ADT Options

               The shareholders of ADT are being requested to ratify all stock
options currently outstanding under ADT's share option and incentive plans,
which the ADT Board believes is in the best interests of ADT.

               The following tables summarize the stock options currently
outstanding under ADT's share option and incentive plans, showing the number
of options and the range of exercise prices.  Each such option will continue
to vest according to the schedule applicable upon grant.  (Most of the options
vest in three equal installments commencing on the first anniversary of the
date of grant.)  The data shown for options outstanding reflect the number of
ADT Common Shares with respect to which options have been granted, without
giving effect to the Merger or the Reverse Stock Split.
<TABLE>
<CAPTION>
                                     ADT 1993 Long Term Incentive Plan


                                                  Options
                                                Outstanding           Range of Exercise Prices
                                                -----------      ---------------------------------
<S>                                           <C>               <C>          <C>           <C>
Michael A. Ashcroft.......................       10,350,000        $8.00        to          $15.00
Raymond A. Gross..........................          100,000                   $16.50
Ronnie G. Lakey...........................          120,000       $12.00        to          $16.50
Michael J. Richardson.....................          360,000        $8.00        to          $16.50
Stephen J. Ruzika.........................        1,033,333        $8.00        to          $15.00
All Executive Officers....................       11,963,333        $8.00        to          $16.50
All employees other than Executive
 Officers.................................        1,815,000        $9.00        to          $20.38
Total options outstanding                        13,778,333        $8.00        to          $20.38
</TABLE>



<TABLE>
<CAPTION>
                                      ADT Senior Executive Share Option Plan


                                                         Options
                                                       Outstanding           Range of Exercise Prices
                                                       -----------        -------------------------------
<S>                                                   <C>               <C>         <C>         <C>
Michael A. Ashcroft...............................        900,000         --         $11.69         --
Stephen J. Ruzika.................................        550,000         $9.00        to          $11.69
All Executive Officers............................      1,450,000         $9.00        to          $11.69
All employees other than Executive Officers.......        300,000                    $11.69
Total options outstanding                               1,750,000         $9.00        to          $11.69
</TABLE>



<TABLE>
<CAPTION>
                                       ADT US Stock Option Plan 1990

                                                         Options
                                                       Outstanding           Range of Exercise Prices
                                                       -----------       --------------------------------
<S>                                                   <C>              <C>         <C>           <C>
Ronnie G. Lakey...................................         25,000            --       $9.00            --
Michael J. Richardson.............................         45,000         $9.00        to          $13.35
Stephen J. Ruzika.................................         75,000                    $13.35
All Executive Officers............................        145,000         $9.00        to          $13.35
All employees other than Executive Officers.......        899,817         $9.00        to          $29.60
Total options outstanding.........................      1,044,817         $9.00        to          $29.60
</TABLE>



<TABLE>
<CAPTION>
                                          ADT International Executive Share Option Plan


                                                     Options
                                                   Outstanding                 Range of Exercise Prices
                                                   -----------      -----------------------------------------------
<S>                                               <C>             <C>                         <C>
All employees other than Executive Officers...      50,000          Pound Sterling 6.08   to   Pound Sterling 17.40
Total options outstanding                           50,000          Pound Sterling 6.08   to   Pound Sterling 17.40
</TABLE>



<TABLE>
<CAPTION>
                                             ADT UK Executive Option Scheme (1984)

                                                     Options
                                                   Outstanding              Range of Exercise Prices
<S>                                               <C>           <C>                  <C>  <C>
All employees other than Executive Officers...        95,500     Pound Sterling 6.08   to  Pound Sterling 18.40
Total options outstanding.....................        95,500     Pound Sterling 6.08   to  Pound Sterling 18.40
</TABLE>

               Tyco Stock Options and Other Rights

               Stock Options.  The Merger Agreement provides that the Combined
Company will assume each outstanding option granted by Tyco to purchase Tyco
Common Shares.  Following consummation of the Merger, each such option will
constitute an option to acquire a number of Combined Company Common Shares
equal to the number of Tyco Common Shares that were issuable upon exercise of
the option immediately prior to the Merger, on the same terms  and conditions.
See "The Merger Agreement--Treatment of Tyco Stock Options."  After the
Merger, the Tyco options assumed by the Combined Company will be administered
under the Amended Long Term Incentive Plan.  There are presently outstanding
options to acquire 3,844,479 Tyco Common Shares issued under the Tyco Option
Plan, and options to acquire 279,170 Tyco Common Shares issued by entities
previously acquired by Tyco whose stock options were assumed by Tyco.

               Options under the Tyco Option Plan are issuable to employees of
Tyco and its subsidiaries, other than executive officers subject to reporting
under Section 16(a) of the Exchange Act.  The options generally have a term of
ten years from the date of grant, and are exercisable at any exercise price
and on a vesting schedule as determined by the Tyco Board.  None of the
options issued under the Tyco Option Plan is currently exercisable.  The
option exercise prices for options issued under the Tyco Option Plan range
from $26.6875 to $59.50 per share.  All of the stock options assumed by Tyco
are currently exercisable, with exercise prices ranging from $0.00 to $105.64
per share.

               Tyco Warrants. The Merger Agreement also provides that the
Combined Company will assume each outstanding Warrant to acquire Tyco Common
Shares.  Following consummation of the Merger, each Warrant will constitute a
warrant to acquire a number of Combined Company Common Shares equal to the
number of Tyco Common Shares that were issuable upon exercise of the Warrant
immediately prior to the Merger, on the same terms and conditions.  See "The
Merger Agreement--Treatment of Tyco Warrants."  The Warrants were issued by
Kendall, and assumed by Tyco following its acquisition of Kendall in October
1994.  Each A Warrant presently entitles its holder to purchase 2.5897 Tyco
Common Shares at an exercise price of $5.97 per share, and each B Warrant
presently entitles its holder to purchase 2.5897 Tyco Common Shares at an
exercise price of $7.96 per share.  There are currently outstanding A Warrants
to acquire 127,568 Tyco Common Shares and B Warrants to acquire 83,282 Tyco
Common Shares.

               Tyco Restricted Stock Plan.  Tyco's 1994 Restricted Stock Plan
allows the Compensation Committee of the Tyco Board to grant restricted stock
to Tyco's senior executive officers as well as other key members of Tyco
management.

               The Merger Agreement provides that the Combined Company will
assume the 1994 Restricted Stock Plan upon consummation of the Merger.  See
"The Merger Agreement--Tyco Restricted Stock Plan."  The Combined Company
Common Shares issuable in exchange for restricted Tyco Common Shares will be
subject to the same vesting schedule and other provisions under the Tyco
Restricted Stock Plan as were applicable to the restricted Tyco Common Shares.

               Approval of the Option and Warrant Proposal by ADT shareholders
is not required under the Merger Agreement and is not a condition to the
Merger.  Even if the Option and Warrant Proposal is not approved, the existing
ADT stock options will remain outstanding in accordance with their terms
regardless of whether the Merger is consummated.  In addition, if the Merger
is consummated, the existing Tyco Stock Options and Warrants will be
assumed by the Combined Company regardless of whether the Option and Warrant
Proposal is approved.

               The ADT Board unanimously recommends that ADT shareholders vote
FOR adoption of the Amended Long Term Incentive Plan, ratification of all
options currently outstanding under ADT's share option and incentive plans
and, contingent on the consummation of the Merger, the assumption of the Tyco
stock options and warrants.

ADT Bye-Law Amendment Proposal

               Bye-Law 45 of the ADT Bye-Laws currently provides that a
general meeting of ADT shareholders may be adjourned with the consent of,
or on the direction of shareholders at, the meeting.  The ADT Board is
proposing the ADT Bye-Law Amendment Proposal to amend the Bye-Laws to vest
in the ADT Board authority to adjourn the meeting without the approval of
the shareholders at the meeting.  Allowing the ADT Board in its discretion
to adjourn a general meeting without a poll of shareholders will simplify
adjournment procedures.  It also may avoid contention over adjournment,
where an adjournment is warranted because of a change in circumstances
occurring since the date for the general meeting was originally set.
Shareholders at a general meeting would retain the right to direct that the
meeting be adjourned, as under the existing Bye-laws.  The ADT Bye-Law
Amendment Proposal will become effective only if the ADT Merger Proposals
are approved by the shareholders of ADT.

               It is currently anticipated that the ADT Meeting relating to
the Merger will take place before the Western Proposals Meeting, which has
already been set for July 8, 1997.  If the ADT Merger Proposals are approved
at the ADT Meeting, it is possible, although not certain, that the Merger will
become effective before the date of the Western Proposals Meeting.  In that
event, the Combined Company Board will consist of the eight present directors
of Tyco, Mr. Ashcroft and two current independent directors of ADT.  In
addition, the Combined Company will have issued Combined Company Common Shares
in the Merger to the shareholders of Tyco representing approximately 64% of
the then outstanding share capital of the Combined Company.

               In these circumstances, the ADT Board believes that it would be
inappropriate for the Western Proposals to be voted upon at the Western
Proposals Meeting to be held on July 8, 1997.  There are also other
circumstances in which ADT believes this might be inappropriate, such as where
the outcome of the Merger remains unclear or the Western Offer has been
amended or has been withdrawn.  Under Bermuda law, however, it is not possible
for the Western Proposals Meeting simply to be canceled or rescheduled.
Bye-Law 45 of the ADT Bye-Laws currently provides that a general meeting may
be adjourned by the chairman of the meeting with the consent, or on the
direction, of shareholders at that meeting.

               Accordingly, at the ADT Meeting, ADT shareholders will be asked
to consider and vote upon a resolution, which will only become effective upon
the approval of the ADT Merger Proposals by the shareholders of ADT, to
amend Bye-Law 45 of the ADT Bye-Laws to grant the power of adjournment to
the ADT Board.  The amended Bye-Law will read in full as follows:

   "The chairman of the meeting may, with the consent of the meeting, and
   shall, if so directed by the meeting or (prior to or at the meeting) by the
   Board of Directors (or a duly authorized committee thereof), adjourn the
   meeting, from time to time and from place to place as the chairman of the
   meeting shall determine (subject to any directions from the Board of
   Directors or a duly authorized committee thereof).  Whenever a meeting is
   adjourned for more than five days, the Directors shall give notice of the
   adjourned meeting in such manner as they consider expedient.  No business
   shall be transacted at any adjourned meeting other than the business which
   might have been transacted at the meeting from which the adjournment took
   place."

               An amendment to the ADT Bye-Laws requires the approval of
the shareholders of ADT in general meeting.  Approval of the ADT Bye-Law
Amendment Proposal is not a condition of the Merger.

               If the ADT Bye-Law Amendment Proposal is approved by ADT
shareholders, it is the present intention of the ADT Board and of the
directors of Tyco and of ADT who will (or may) constitute the Combined Company
Board, to adjourn the Western Proposals Meeting to a date to be determined by
the ADT Board or the Combined Company Board, as the case may be, unless at
that time Western has acquired a majority of the outstanding ADT Common
Shares.  The purpose of the adjournment would be to allow the Western Proposals
to be considered at a time when the outcome of the Merger is clear and all
shareholders of ADT (including such persons as may become ADT shareholders
pursuant to the Merger) are able properly to consider and vote upon the
Western Proposals.

               The ADT Board unanimously recommends that ADT shareholders vote
FOR the ADT Bye-Law Amendment Proposal.
    



                       COMPARISON OF SHAREHOLDER RIGHTS

General

   
               The rights of ADT shareholders are governed by Bermuda law and
the ADT Memorandum and the ADT Bye-Laws.  The rights of Tyco shareholders are
governed by Massachusetts law and the Tyco Articles and the Tyco Bylaws.  Upon
consummation of the Merger, the rights of ADT shareholders and of Tyco
shareholders who become shareholders of the Combined Company in the Merger
will be governed by Bermuda law, the ADT Memorandum (referred to in this
section as the "Combined Company Memorandum") and the ADT Bye-Laws (referred
to in this section as the "Combined Company Bye-Laws").  The following is a
summary of the principal differences between the current rights of Tyco
shareholders and those of Combined Company shareholders following the Merger.
    

               The following discussions are not intended to be complete and
are qualified by reference to Bermuda law, Massachusetts law and the ADT
Memorandum, the ADT Bye-Laws, the Tyco Articles and the Tyco Bylaws.  Copies
of the ADT Memorandum, the ADT Bye-Laws, the Tyco Articles and the Tyco Bylaws
will be sent to holders of ADT Common Shares and Tyco Common Shares upon
request.  See "Where You Can Find More Information."

Comparison of Current Tyco Shareholder Rights and Rights of Combined Company
Shareholders Following the Merger

   
               Quorum.  The Tyco Bylaws provide that holders of a majority of
shares entitled to vote generally in the election of directors constitutes a
quorum. Pursuant to the Combined Company Bye-Laws, the presence, either in
person or by proxy, of two holders of Combined Company Common Shares at any
general meeting constitutes a quorum.
    

               Voting Rights. Massachusetts law provides that shareholders
entitled to vote shall have one vote for each share of stock owned by them and
a proportionate vote for a fractional share.  Pursuant to the Tyco Bylaws,
when a quorum is present, any matter brought before a shareholder meeting
shall be decided by the vote of a majority of the votes entitled to be cast
and are present, either in person or by proxy, at such meeting, except where a
larger vote is otherwise required by law or the Tyco Articles. Neither
Massachusetts law nor the Tyco Articles or Bylaws contain a provision that
allows shareholder voting by a show of hands.

   
               Under Bermuda law, questions proposed for consideration at a
general meeting shall be decided on a simple majority of votes or by such
majority as the bye-laws of a company may prescribe except where a larger
majority is required by law.  Any question proposed for consideration at a
general meeting may be decided on a show of hands in which each shareholder
present in person or by proxy is entitled to one vote and casts such vote by
raising his or her hand unless, before or on the declaration of the result of
a show of hands, a poll is demanded by (i) the Chairman of the meeting, (ii)
at least three shareholders present in person or represented by proxy, (iii)
any shareholder or shareholders present in person or represented by proxy
holding between them 10% of the total voting rights of all the shareholders
entitled to vote at such meeting, or (iv) a shareholder or shareholders
present in person or represented by proxy holding shares in such company
entitled to vote at such meeting and on which an aggregate sum has been paid
up equal to at least 10% of the total sum paid up on all such shares entitled
to vote. Where a poll has been demanded, every shareholder present in person
or by proxy is entitled to one vote for each share held by him.
    

               The Combined Company Bye-Laws provide that a Combined Company
shareholder is not entitled (except as a proxy for another shareholder) to be
present or vote at any meeting if such shareholder has been served, and failed
to comply, with a notice under the Combined Company Bye-Laws stating that such
shareholder must make an offer in accordance with the City Code (as defined
below), as applied by the Combined Company Bye-Laws (as described below), or,
as the case may be, in accordance with the Combined Company Bye-Laws.  A
shareholder of the Combined Company also loses the right to vote for a period
of 180 days if such shareholder acquires three percent or more of the issued
share capital of any class of Combined Company shares, either alone or with
others, and fails to notify the Combined Company of such acquisition within two
days or, already possessing three percent or more, the shareholder fails to
notify the Combined Company of a change in the shareholder's interests
amounting to one percent or more of the share capital of any class and such
shareholder is so notified by the Combined Company Board of such loss of
right. In addition, the Combined Company Bye-Laws provide that any person who
is known or believed by the Combined Company to be interested in Combined
Company Common Shares and has failed to comply with a notice from the Combined
Company requesting specified information regarding such person's interests in
shares in the Combined Company shall lose the right to vote for the period
during which such person fails to comply with the notice plus an additional
ninety days.

               Massachusetts law has no cumulative voting provision, and the
Tyco Articles do not provide for such cumulative voting.  Under cumulative
voting, each shareholder casts as many votes for directors as he has shares of
stock multiplied by the number of directors to be elected.  Bermuda law
allows, but does not require, cumulative voting for the election of directors.
Combined Company shareholders do not have cumulative voting rights for the
election of directors, either under Bermuda law or under the Combined Company
Bye-Laws.

               Shareholder Proposals. Under the Tyco Bylaws, shareholder
proposals or nominations of persons for election to the Tyco Board to be
submitted at a shareholders meeting require advance notice. To be timely, such
advance notice must be received in writing by the Secretary of Tyco not less
than sixty days prior to the meeting in question and, if pertaining to the
nomination of persons for election to the Tyco Board, shall contain the name
of the proposed nominee, certain information required by Section 14 of the
Exchange Act with respect to the proposed nominee and a representation that
the proposed nominee has consented to being named in a proxy as a nominee for
director and has consented to serve as a director if elected.

   
               Under Bermuda law, a shareholder wishing to move a resolution
at an annual general meeting of a company must give notice to the company of
the resolution at least six weeks before the meeting.  If after notice has
been given and an annual general meeting is called for a date less than six
weeks after the giving of that notice, the notice shall be deemed to have been
given in time.  Only shareholders who represent not less than one-twentieth of
the total voting rights of members having a right to vote at the meeting or
who are one hundred or more in number may requisition a resolution at an
annual general meeting.  The Combined Company Bye-Laws provide that other than
a director retiring at a general meeting of shareholders or unless recommended
by the Combined Company Board, advance written notice to the Secretary of the
Combined Company of shareholder nominations of persons for election to the
Combined Company Board is required. To be timely, such notice must be received
by the Secretary of the Combined Company not less than six and not more than
twenty-eight clear days before the day appointed for the meeting at which such
election is to be held. Such notice must be given by a shareholder (not being
the person to be proposed) entitled to attend and vote at the meeting for
which such notice is given and must also include notice in writing signed by
the person to be proposed of such person's willingness to be elected.
    

               Special Meeting of Shareholders.  Massachusetts law provides
that special meetings of shareholders of a corporation with a class of voting
stock registered under the Exchange Act may be called by a corporation's
president or its board of directors, and, unless otherwise provided in the
corporation's articles of organization or bylaws, must be called by its clerk
or other officer upon written application of the owners of at least 40% of the
corporation's stock entitled to vote at such meeting.  The Tyco Bylaws provide
that a special meeting of shareholders may be called by the chief executive
officer or by the Tyco Board on ten days' written notice or as otherwise
provided by law. The Combined Company Bye-Laws provide that the directors of
the Combined Company are authorized to call a special general meeting at any
time on not less than five days' notice. Pursuant to Bermuda law and the
Combined Company Bye-Laws, the Combined Company Board is also required, on the
written request of Combined Company shareholders holding at least 10% of the
paid-up capital of the Combined Company entitled to vote at a general meeting,
to convene a special general meeting of the Combined Company. If the directors
do not convene a meeting within twenty-one days from the date of the request,
the requesting shareholders, or any of them representing more than one-half of
the total voting rights of all of them, may themselves convene a meeting, but
any meeting so convened may not be held later than three months from the date
of the request.

   
               Inspection Rights.  Under Massachusetts law, a corporation's
shareholders have the right for a proper purpose to inspect the corporation's
articles of organization, bylaws, records of all meetings of incorporators and
shareholders, and its stock and transfer records, including the shareholder
list.  In addition, shareholders of a Massachusetts business corporation have
a qualified common-law right under certain circumstances to inspect other
books and records of the corporation.
    

               Under Bermuda law, members of the general public have the right
to inspect the public documents (which include the Memorandum of Association
(including its objects and powers) and any amendments thereto and documents
relating to any increase or reduction of authorized capital) of a Bermuda
company at the office of the Registrar of Companies in Bermuda.  The
shareholders of a Bermuda company have the additional right to receive a copy
of the company's bye-laws and its audited financial statements and the right
to inspect minutes of general meetings.  The register of shareholders of a
Bermuda company is also open for inspection by shareholders without charge,
and to members of the general public for a minimal fee.  A Bermuda company
must also keep at its registered office a register of directors and officers
which is open for inspection by members of the public without charge.  Bermuda
law does not provide a general right for shareholders to inspect or obtain
copies of any other corporate records.

   
               Dividends.  Under Massachusetts law, the payment of dividends
is generally permissible if such payment is not made when the corporation is
insolvent, does not render the corporation insolvent and does not otherwise
violate the law or the corporation's articles of organization.  Under Bermuda
law, a dividend cannot be declared or paid if there are reasonable grounds for
believing that the company is, or after such payment would be, unable to pay
its liabilities as they became due or if the realizable value of the company's
assets would thereby be less than the aggregate of its liabilities and its
issued share capital and share premium accounts.  Under the Combined Company
Bye-Laws, dividends may only be paid out of profits available for the purpose,
and a shareholder's right to receive dividends is suspended during such time
as he is disqualified from voting, as stated above under "Voting Rights."
    

               Derivative Actions.  Under Massachusetts law, a shareholder may
institute a derivative suit in the right of the corporation against the
shareholders, officers or directors of a corporation if he or she was a
shareholder at the time of the act complained of or received his or her shares
by operation of law from one who was a shareholder at such time.  Under
Bermuda law, subject to certain limited exceptions, minority shareholders are
not permitted to bring derivative actions for wrongs done to their company.

               Board of Directors.  Massachusetts law and the Tyco Bylaws
provide that the number of directors shall be not less than three.  The Tyco
Board currently consists of eight members. Under the Tyco Bylaws the number
of directors may be increased at any meeting of shareholders or by vote of a
majority of the directors then in office.  The Combined Company Bye-Laws
provide that the number of directors shall be such number, not less than two,
as the shareholders at a general meeting may from time to time determine.

               Classification of the Board of Directors.  Massachusetts law
provides that the directors of a publicly-held corporation shall be classified
into three classes, with the effect that directors are elected and serve for
staggered terms of three years.  Massachusetts law permits a corporation to
opt out of the classified board provisions by vote of the directors or by a
two-thirds vote of shareholders.  Tyco has, by vote of its directors, opted
out of the classified board provisions of Massachusetts law, and the Tyco
Bylaws provide for an annual election of all directors.  However,
Massachusetts law provides that a publicly-held corporation that has opted out
of the classified board provisions by vote of its directors may at any time
thereafter by vote of its directors (and without any action on the part of its
shareholders) elect to become subject to the classified board provisions.
Massachusetts law provides that, at any time that the classified board
provisions are in effect, (i) directors may be removed only for cause (as
defined), (ii) the number of directors shall be fixed only by vote of the
directors, and (iii) vacancies and newly created directorships shall be filled
solely by vote of a majority of the remaining directors then in office.  The
Combined Company Board is not classified, and the Combined Company Bye-Laws do
not contemplate a classified board.  Under Bermuda law, the election of
directors of a company may be regulated by its bye-laws or otherwise
determined by the company in general meeting.  The Combined Company Bye-laws
do not prescribe any particular term of office for a director, except one
appointed to fill a casual vacancy.

   
               Removal of Directors; Vacancies on the Board of Directors.
Pursuant to Massachusetts law and the Tyco Bylaws and subject to the
provisions of the immediately preceding paragraph, a director may be removed
from office with or without cause by the holders of a majority of votes
entitled to vote generally in the election of directors, and with cause by a
vote of the majority of directors then in office. Any removal of a director for
cause requires adherence to certain due process requirements. Under
Massachusetts law and the Tyco Bylaws, vacancies on the board of directors and
newly created directorships resulting from any increase in the authorized
number of directors are filled by the remaining directors.
    

               Bermuda law provides that, subject to its bye-laws, the
shareholders of a company may at a special general meeting called for that
purpose remove a director, subject to statutory due process requirements.  The
Combined Company Bye-Laws provide that any director may at any time be removed
from office as a director either by resolution of the Combined Company
shareholders to that effect or upon a written resolution signed by all the
other directors of the Combined Company. The remaining Combined Company
directors have the power to appoint any qualified person to fill a casual
vacancy in the Combined Company Board who shall hold office until the next
following annual general meeting, and the existing directors may act
notwithstanding any vacancy in the board of directors.

   
               Exculpation of Directors.  Massachusetts law permits a company
to eliminate or limit the personal liability of a director to the company and
its shareholders for monetary damages for breaches of fiduciary duty, except
where such exculpation is expressly prohibited. The circumstances under which
such exculpation is prohibited include breaches of a director's duty of
loyalty, actions undertaken not in good faith or involving intentional
misconduct or knowing violations of law, certain actions relating to
unauthorized distributions and loans to insiders and transactions from which
the director derived an improper personal benefit.  The Tyco Articles provide
for exculpation for directors.
    

               Bermuda law permits a company to exempt a director from
liability with respect to any negligence, default, breach of duty or breach of
trust of which a director may be guilty in relation to the company or any of
its subsidiaries except from any liability resulting from fraud or dishonesty.
The Combined Company Bye-Laws provide for such exculpation for directors
except in relation to the director's own willful negligence, willful default,
fraud or dishonesty.

               Indemnification of Directors, Officers and Others.
Massachusetts law permits indemnification of directors and officers for
expenses incurred by them by reason of their position with the corporation, if
the director or officer has acted in good faith and with the reasonable belief
that his conduct was in the best interest of the corporation. The Tyco
Articles provide for the indemnification of each director of Tyco and any
other person who serves in any other office filled by election or appointment
by Tyco shareholders or the Tyco Board of Directors against all expenses,
including any judgments, amounts reasonably paid in settlement and reasonably
incurred professional fees and other disbursements incurred in connection with
each suit or proceeding in which such person is involved as a result of
serving or having served in such office or at Tyco's request as a director,
officer, employee or other agent of any other organization. No indemnification
is available with respect to any matter as to which there shall have been an
adjudication that the person seeking indemnification did not act in good faith
in the reasonable belief that such person's action was in the best interest of
Tyco. Neither Massachusetts law nor the Tyco Articles prohibit or limit the
rights to indemnification for judgments in derivative actions, but it is not
clear that a Massachusetts court would permit indemnification in such
circumstances.

               Bermuda law permits a company to indemnify its officers and
employees with respect to any loss arising or liability attaching to such
persons by virtue of any rule of law concerning any negligence, default,
breach of duty or breach of trust of which the officer or employee may be
guilty in relation to the company or any subsidiary thereof; provided,
however, that the company shall not indemnify an officer or employee against
any liability arising out of any fraud or dishonesty of which such person may
be guilty. The Combined Company Bye-Laws provide that every director,
secretary and other officer of the Combined Company shall be indemnified by
the Combined Company against all costs, losses and expenses which any such
officer may be liable for by reason of any contract entered into, or any act
or thing done by such officer in the discharge of such officer's duties,
provided that the indemnity contained in the Combined Company Bye-Laws shall
not extend to any matter which would render such indemnification void under
applicable Bermuda law.

   
               Interested Director Transactions.  Massachusetts does not have
a general statutory provision governing interested director transactions.
Under Massachusetts law, interested director transactions may be challenged
on the grounds that the transaction is unfair to the corporation or that it
was not entered into in good faith.  The Tyco Articles provide that, unless
entered into in bad faith, no contract or transaction by Tyco shall be void or
voidable by reason of the fact that it is with an officer, director,
shareholder, employee or other interested person, and such person shall not be
liable to Tyco or any other person because of such interest. These provisions
apply notwithstanding that the presence of such interested person was
necessary to constitute a quorum at the meeting at which such contract or
transaction was authorized or that the vote of such person was necessary for
authorization of such contract or transaction.
    

               Under the Combined Company Bye-Laws, no director is
disqualified from contracting with the Combined Company and no contract will
be avoided by reason of such director holding that office or of the fiduciary
relationship thereby established if the requisite disclosure by the interested
director is made. A director who to his knowledge is in any way, whether
directly or indirectly, interested in a contract or arrangement with the
Combined Company shall declare the nature of his interest at the meeting of
the directors at which the question of entering into the contract or
arrangement is first taken into consideration, if he knows his interest then
exists, or in any other case at the first meeting of the directors after he
knows that he is or has become so interested. Subject to certain exceptions,
an interested director shall not be counted towards a quorum, nor vote, with
respect to the board of directors authorization of such contract.  Failure to
make a declaration of interest constitutes a breach of duty of a director
under Bermuda law.

               Amendments to Constitutional Documents.  Under Massachusetts
law, amendments to a corporation's articles of organization relating to
certain changes in capital or in the corporate name require the vote of at
least a majority of each class of stock outstanding and entitled to vote
thereon. Amendments relating to other matters require a vote of at least
two-thirds of each class outstanding and entitled to vote thereon or, if the
articles of organization so provide, a greater or lesser proportion but not
less than a majority of the outstanding shares of each class. The Tyco
Articles contain no such provision. Under Massachusetts law, the articles of
organization or by-laws may provide that all outstanding classes of stock
shall vote as a single class, but the separate vote of any class of stock the
rights of which would be adversely affected by the amendment is also required.

   
               Bermuda law provides that a company may, with the consent of
the Minister of Finance, by resolution passed at a general meeting of members
of which due notice has been given, alter the provisions of its memorandum of
association. Holders of at least 20% of any class of the company's share
capital may apply to the Bermuda Supreme Court to annul an alteration and, if
such application is made, the alteration shall not have effect except insofar
as it is confirmed by the Court.  In addition, under Bermuda law a company may
alter the conditions of its memorandum of association, if so authorized by a
general meeting and by its bye-laws, so as to increase its share capital,
divide its shares into several classes, consolidate and divide its share
capital into shares of a larger par value, sub-divide its shares into shares
of a smaller par value, change the currency denomination of its share capital
and cancel any shares which have not been taken or agreed to be taken by any
person and diminish the amount of its share capital by the amount so canceled.
The Combined Company Bye-Laws include such authority (except as to changing
the currency denomination of its share capital).
    

               Bermuda law also permits a company or any of its subsidiaries
to purchase shares in the company.  In the case of a purchase by the company
itself, purchases may only be made if the company is so authorized by its
memorandum of association or bye-laws and if its issued share capital is not
thereby reduced below the minimum capital specified in its memorandum.  The
Combined Company Bye-Laws contain such authority in respect of such amount of
share capital as is authorized by the shareholders in general meeting from
time to time.   The Combined Company Bye-Laws provide that the rights attached
to any class of shares (unless otherwise provided by the terms of such class)
may be varied either by the consent in writing of the holders of three-fourths
of the issued shares of the class or by a resolution passed at a separate
meeting of the holders of such class of shares by the holders of three-fourths
of the shares of such class voting at such separate meeting. The rules of a
Combined Company general shareholder meeting shall apply, mutatis mutandis, to
such separate meeting, except that (i) the quorum required at such separate
meeting shall be three or more persons holding or representing by proxy not
less than one-third of the issued shares of the class, except that at any
adjourned meeting, two holders of the shares of the class present in person or
by proxy (whatever the number of shares held by them) shall constitute a
quorum; (ii) every holder of shares of the class shall be entitled on a poll to
one vote for every share of such class held; and (iii) any holder of shares of
the class present in person or by proxy may demand a poll.  Pursuant to
Bermuda law, holders of at least 10% of the class of shares may apply to the
Bermuda Supreme Court to cancel a variation otherwise approved by the
requisite vote. Upon such application, the variation shall not have effect
unless and until it is confirmed by the Court.

   
               Under Massachusetts law, the power to make, amend or repeal
bylaws lies in the shareholders; provided that, if authorized by the articles
of organization, the bylaws may provide that the directors may also make,
amend or repeal the bylaws, except with respect to any provision which by law,
the articles of organization or the bylaws requires action by the
shareholders.  The Tyco Articles also provide that the Tyco Board, as well as
the shareholders, may amend the Tyco Bylaws to the extent permitted by law.
The Tyco Bylaws provide that any amendment or bylaw adopted by the Tyco Board
may be amended or repealed by the shareholders.  The Tyco Bylaws further
provide that the provisions of the Tyco Bylaws relating to Business
Combinations with Related Persons may only be amended or repealed by the vote
of the holders of not less than 80% of the Voting Stock (as defined in the
Tyco Bylaws), unless such amendment is approved by the majority of Continuing
Directors (as defined in the Tyco Bylaws), in which case such amendment shall
only require the affirmative vote of the shareholders otherwise required by
law, the Tyco Bylaws or the Tyco Articles.  See "Provisions Concerning
Significant Shareholders" below.  Pursuant to Bermuda law and the Combined
Company Bye-Laws, the Combined Company Board may amend the Combined Company
Bye-Laws, provided that no such amendment will be operative unless and until
it is confirmed by the Combined Company shareholders at a general meeting of
the Combined Company shareholders.
    

               Sale, Lease or Exchange of Assets and Mergers.  Massachusetts
law provides that a vote of two-thirds of the shares of each class of stock
outstanding and entitled to vote thereon is required to authorize the sale,
lease or exchange of all or substantially all of a corporation's property and
assets or a merger or consolidation of the corporation into any other
corporation, except that the articles of organization may provide that the
vote of a greater or lesser proportion, but not less than a majority of the
outstanding shares of each class, is required.  Under Massachusetts law, a
merger or consolidation also requires the separate vote of any class of stock,
the rights of which would be adversely affected by the transaction.

               Under Bermuda law, there is no requirement for a company's
shareholders to approve a sale, lease or exchange of any of its property and
assets.  Under Bermuda law, a company may enter into a compromise or
arrangement in connection with a scheme for the reconstruction of the company
on terms which include, among other things, the transfer of all or part of the
undertaking or assets of the company to another company.  Any such compromise
or arrangement requires the approval of a majority in number representing
three-fourths in value of each class of shareholders of the company and the
sanction of the Bermuda Supreme Court.

               Pursuant to Bermuda law, unless the company's bye-laws provide
otherwise, an amalgamation requires the approval of the holders of at least
three-fourths of those voting at a meeting of shareholders at which a
requisite quorum is present. For purposes of approval of an amalgamation, all
shares, whether or not otherwise entitled to vote, carry the right to vote.  A
separate vote of a class of shares is required if the rights of such class
would be altered by virtue of the amalgamation.

               Provisions Concerning Significant Shareholders.  Article I,
Section 6 of the Tyco Bylaws provides that any person (a "Related Person") who
together with its Affiliates and Associates (each as defined in the Tyco
Bylaws) owns 5% or more of the outstanding shares of Voting Stock (defined in
the Tyco Bylaws to include all outstanding shares of capital stock of Tyco
entitled to vote in the election of directors other than shares only entitled
to vote upon the occurrence of a specified event or condition) of Tyco, and
any Affiliate or Associate of such person (other than Tyco and its
Subsidiaries (as defined in the Tyco Bylaws)), must comply with certain
minimum price and procedural requirements or, in the alternative, obtain the
advance approval of a majority of Tyco's Continuing Directors (as defined in
the Tyco Bylaws) or holders of not less than 80% of Tyco's Voting Stock in
order to effect a merger or other Business Combination involving Tyco. The
various transactions in the definition of "Business Combination" include: any
merger or consolidation of Tyco or of any of its Subsidiaries with or into a
Related Person; any sale, lease, exchange, transfer or other disposition, in
one transaction or a series of transaction, (i) to a Related Person or an
Affiliate or Associate of a Related Person of any Substantial Part (as defined
in the Tyco Bylaws) of the assets of Tyco or a Subsidiary or (ii) from a
Related Person or an Affiliate or Associate of a Related Person, in an amount
that would constitute, immediately prior to such transaction, a Substantial
Part of the assets of Tyco; any issuance or sale by Tyco or a Subsidiary of
any of its securities to a Related Person or an Affiliate or Associate of a
Related Person other than pursuant to an employee plan approved by a majority
of the Continuing Directors and the shareholders of Tyco; any acquisition by
Tyco or a Subsidiary of any securities of a Related Person or Affiliate or
Associate of a Related Person; any adoption of any plan for the liquidation or
dissolution of Tyco proposed by or on behalf of a Related Person or any
Affiliate or Associate of a Related Person; and any reclassification of
securities, recapitalization of Tyco or any other transaction that has the
effect, directly or indirectly, of increasing the proportion of the
outstanding shares of any class of Tyco's or any Subsidiary's equity
securities owned by a Related Person or any Affiliate or Associate of a
Related Person. The Tyco Bylaws confer upon a majority of the Continuing
Directors the authority to determine, among other things, whether a person is
a Related Person and whether any proposed Business Combination complies with
the minimum price and procedural requirements. This section of the Tyco Bylaws
cannot be repealed or amended, nor may an inconsistent provision be adopted,
without the affirmative vote of a majority of the Continuing Directors or
holders of not less than 80% of the outstanding shares of the Voting Stock of
Tyco.

               Pursuant to Combined Company Bye-Law 104(1)(A), if any person,
whether as a result of one transaction or a series of transactions, would be
obligated to make an offer to the Combined Company security holders pursuant
to the Rules of the City Code on Take-overs and Mergers of the United Kingdom
of Great Britain and Northern Ireland (the "City Code"), the Combined Company
Board may require such person to make such an offer as if the City Code
applied to the Combined Company. The City Code provides that when any person
(and persons acting in concert with such person) acquires shares which carry
30% or more of the voting rights of a company, such person must make an offer
for all shares of any class of equity share capital (whether voting or
non-voting) and also any voting non-equity share capital in which any such
person or persons hold shares. The offer must be for cash or offer a cash
alternative, in each case at not less than the highest price paid (in cash or
otherwise) for shares of the same class by the offeror, or anyone acting in
concert with the offeror, during the offer period and within the 12 months
prior to commencement of the offer.

   
               Bye-Law 104(3) further provides that where any person is
interested, whether as a result of a series of transactions over a period of
time or not, in 30% or more of the outstanding shares, the Combined Company
Board may serve a notice requiring that person to make an offer for all of the
outstanding securities of the Combined Company if the Combined Company Board
determines that an offer pursuant to Bye-Law 104(1)(A) of the Combined Company
Bye-Laws is not expedient or if a person required to make such an offer fails
to do so.  Such offer must be made within 30 days of the demand on terms that
payment in full therefor will be made within 21 days of such offer becoming
unconditional in all respects. If the Combined Company Board serves a notice
under this provision, the Combined Company Board may also require that the
offeror offer to purchase securities of the Combined Company convertible into
voting or non-voting shares of the Combined Company on terms considered "fair
and reasonable" by the Combined Company Board in its sole discretion. Unless
the Combined Company Board otherwise agrees, such an offer must be for cash or
must offer a cash alternative at not less than the highest price paid by the
offeror or any person acting in concert with it for shares of such class
within the preceding 12 months or, if unavailable or inappropriate, at a price
fixed by the directors.  Any such offer must remain open for at least 14 days
after the date on which it becomes unconditional as to acceptances.
    

               Bye-Law 104(1)(B) provides that when any person has acquired,
is in the process of acquiring, or appears to the Combined Company Board
likely to acquire an interest in the capital stock of the Combined Company in
circumstances in which such person would be subject to the Rules Governing
Substantial Acquisitions of Shares ("SARs"), the Combined Company Board may
give notice requiring such person to comply with the SARs, and if such person
fails to comply, give further notice requiring such person to dispose or to
procure the disposal by any person with whom such person has acted in concert
of any interest in shares acquired within 28 days of the date of such notice.
The SARs provide that a person may not, in any period of seven days, acquire
shares representing 10% or more of the voting rights in a company if such
shares, aggregated with shares already held by the purchaser, would carry 15%
or more but less than 30% of the voting rights of such company. The SARs do
not apply to an acquisition from a single shareholder if such acquisition is
the only acquisition within a seven-day period. The SARs also do not apply to
a person who acquires 30% or more of the voting rights in a company.

               Under the Combined Company Bye-Laws, any person who acquires an
interest in three per cent or more of the issued share capital of any class of
the Combined Company is required to notify the company of that interest and,
on any change in that person's interest amounting to one per cent, or more of
the issued capital of any class, of such change.  Any such notification must
be made within two days (Saturdays and Sundays excluded) after the relevant
event.  In determining the percentage interest of any person for these
purposes, interests of persons acting in concert for the purposes of Bye-law
104 may be aggregated.  Neither Massachusetts law nor the Tyco Bylaws include
any corresponding requirement.

               Take-Over Bid Statute.  Under Massachusetts law, the take-over
bid statute imposes procedural requirements in connection with certain
take-over bids.  A take-over bid ("Take-Over Bid") is the acquisition or offer
to acquire stock which would result in the acquiror possessing more than 10%
of the voting power of any class of an issuer's stock.  A Take-Over Bid does
not include, among other things, any offer which the board of directors of the
issuer has consented to and approved and has recommended its shareholders
accept, if the terms of such bid, including any inducements to officers or
directors which are not made available to all shareholders, have been
furnished to the shareholders.   Bermuda does not have a similar statute.

               Business Combination Statute. Massachusetts' "business
combination" statute provides that, if a person (with certain exceptions)
acquires 5% or more of the stock of a Massachusetts corporation without the
approval of the board of directors of that corporation (an "interested
shareholder"), he may not engage in certain transactions with the corporation
for a period of three years. The Massachusetts statute includes certain
exceptions to this prohibition; for example, if the board of directors
approves the acquisition of stock or the transaction prior to the time that
the person became an interested shareholder, or if the interested shareholder
acquires 90% of the voting stock of the corporation (excluding voting stock
owned by directors who are also officers and certain employee stock plans) in
one transaction, or if the transaction is approved by the board of directors
and by the affirmative vote of two-thirds of the outstanding voting stock
which is not owned by the interested shareholder. The business combination
statute permits a corporation to elect not to be governed by these provisions
by including such an election in its articles of organization or bylaws. Tyco
has not made such an election and is subject to the Massachusetts business
combination statute. Bermuda does not have a similar statute.

               Control Share Acquisition Statute. Under the Massachusetts
control share acquisition statute, a person (hereinafter, the "acquirer") who
makes a bona fide offer to acquire, or acquires, shares of stock of a public
corporation that, when combined with shares already owned, would increase the
acquirer's ownership to at least 20%, 33 1/3% or a majority of the voting
stock of the corporation, the acquirer must obtain the approval of a majority
of shares held by all shareholders except the acquirer and the officers and
inside directors of the corporation in order to vote the shares acquired. The
statute does not require the acquirer to consummate the purchase before the
shareholder vote is taken. The control share acquisition statute permits a
Massachusetts corporation to elect not to be governed by these provisions by
including such an election in its articles of organization or by-laws. The
Tyco Articles and the Tyco Bylaws have no such provision. Bermuda does not
have a similar statute.

               Required Purchase and Sale of Shares.  Pursuant to Bermuda law,
where the transfer of shares or any class of shares in a company (the
"transferor company") to another company (the "transferee company") has,
within four months after the making of the offer, been approved by the holders
of not less than 90% in value of the shares or class of shares for which the
offer was made, subject to the satisfaction of certain conditions, the
transferee company may, within two months after the expiration of the four
month period, give notice to any dissenting shareholder that it desires to
acquire his or her shares, and then such transferee company shall be entitled
and bound to acquire such shares on the terms on which shareholders that
approved such scheme or contract transferred their shares, unless the Bermuda
Supreme Court orders otherwise upon application by the dissenting shareholder.
"Dissenting shareholder" includes a shareholder that has not assented to a
scheme or contract and any shareholder that has failed or refused to transfer
shares to the transferee company.

               Within one month of the transfer of 90% in value of the
transferor company's shares or class of shares to the transferee company, or
to its nominee or subsidiary, the transferee company shall notify the holders
of the remaining shares of such transfer. Within three months of the giving of
notice, any such remaining holder of shares may require the transferee company
to acquire his shares, and the transferee company shall be required to acquire
such shares on the same terms as provided for in the scheme or contract or
upon such terms as may be agreed or upon such terms as the Bermuda Supreme
Court may determine upon application of the transferee company or the
shareholder.  Neither Massachusetts law nor the Tyco Articles or the Tyco
Bylaws contain similar provisions.

               Short Form Merger.  Under Massachusetts law, where 90% of the
outstanding shares of each class of stock of a corporation is owned by another
corporation, the parent corporation may merge such other corporation into
itself by vote of the parent corporation's directors only. In the event that
all of the stock of a subsidiary Massachusetts corporation which is party to a
short-form merger under this provision of Massachusetts law is not owned by
the parent corporation, the minority shareholders of such subsidiary
corporation have appraisal rights under Massachusetts law.

   
               Bermuda law provides for short form mergers between companies
and their wholly-owned subsidiaries.  Under Bermuda law, a holder or holders
of not less than 95% of the shares of any class of shares in a Bermuda company
may give notice to the remaining shareholders or class of shareholders of the
intention to acquire their shares on the terms set out in the notice. Bermuda
law provides that when such notice is given, the acquiring holder or holders
shall be entitled and bound to acquire the shares of the remaining shareholders
on the terms set out in the notice unless the remaining shareholders exercise
statutory appraisal rights.  Bermuda law additionally provides a right of
appraisal in respect of the situation in which a holder of not less than 95%
of the shares of any class of shares in the company proposes to acquire the
remaining shares.
    

               Appraisal Rights.  Under Massachusetts law, a properly
dissenting shareholder is entitled to receive the appraised value of his
shares when the corporation votes (i) to sell, lease or exchange all or
substantially all of its property and assets, (ii) to adopt an amendment to
its articles of organization that adversely affects the rights of the
shareholder, or (iii) to merge or consolidate with another corporation, unless
the corporation survives the transaction and a vote of the shareholders was
not required by statute to approve such merger or consolidation.

               Under Bermuda law, a properly dissenting shareholder who did
not vote in favor of an amalgamation and who is not satisfied that he has been
offered fair value for his shares is entitled to receive the appraised value
of his shares.

   
               Shareholder Rights Plan.  Although Massachusetts law provides
specific statutory authorization for the adoption of a shareholder rights
plan, Tyco does not have a shareholder rights plan.  In 1996, ADT adopted the
ADT Shareholders Rights Plan.  The ADT Shareholders Rights Plan provides that
unless certain actions are taken by the ADT Board (as appropriate, ADT also
refers to the Combined Company after the Effective Time), upon the
Distribution Date (as defined) each Right, other than those Rights owned by an
Acquiring Person (as defined) will become exercisable. Each Right entitles its
holder, among other things, to purchase ADT Common Shares from ADT at a 50%
discount from the market price of ADT Common Shares on the Distribution Date.
It is a condition to the Merger that ADT take such action as shall be required
to either (i) amend the ADT Shareholders Rights Plan to provide that no
Distribution Date shall occur and no person shall become an Acquiring Person
by reason of the consummation of the Merger or the transactions contemplated by
the Merger Agreement or (ii) redeem or otherwise terminate all outstanding
Rights. See "The Merger Agreement--Certain Covenants; Conditions to the
Merger."

               Consideration of Societal Factors. Massachusetts law expressly
provides that, in determining what a director reasonably believes to be in the
best interests of the corporation, he or she may consider the interests of the
corporation's employees, suppliers, creditors and customers; the economy of
the state, region and nation; community and societal considerations; and the
long-term as well as short-term interests of the corporation and its
shareholders, including the possibility that these interests may be best
served by the continued independence of the corporation. Thus, these interests
could be considered even in connection with a decision to sell the company.
The Tyco Articles and the Tyco Bylaws do not discuss the consideration of
societal factors.  Neither Bermuda law nor the Combined Company Memorandum or
the Combined Company Bye-Laws contain provisions regarding consideration of
societal factors.
    



                        DESCRIPTION OF COMBINED COMPANY SHARE CAPITAL

               The summary of the terms of the share capital of the Combined
Company set forth below does not purport to be complete and is qualified by
reference to the Combined Company Memorandum and the Combined Company
Bye-Laws.  Copies of the Combined Company Memorandum and the Combined Company
Bye-Laws are incorporated by reference in this Joint Proxy
Statement/Prospectus and will be sent to holders of ADT Common Shares and Tyco
Common Shares upon request.  See "Where You Can Find More Information."

Authorized Share Capital

               Upon the Merger becoming effective, the Combined Company's
authorized share capital will consist of 750,000,000 Combined Company Common
Shares, par value $0.20 per share, 125,725,000 convertible cumulative
redeemable preference shares, par value $1 per share, divided into three
classes (the "Convertible Preference Shares") (including a class of first
preference shares (the "First Preference Shares")), and 25,000 exchangeable
cumulative redeemable preference shares, par value $1 per share (the
"Exchangeable Preference Shares") (the Convertible Preference Shares and the
Exchangeable Preference Shares, collectively, the "Preference Shares").

Combined Company Common Shares

   
               Dividends.  The directors of the Combined Company may declare
dividends out of profits of the Combined Company available for that purpose as
long as there are no reasonable grounds for believing that the Combined
Company is, or after such dividend would be, unable to pay its liabilities as
they became due or if the realizable value of the Combined Company's assets
would thereby be less than the aggregate of its liabilities and its issued
share capital and share premium accounts.  Subject to such special rights as
may be attached to any other shares in the Combined Company, all dividends are
payable according to the amounts paid or credited as paid on the Combined
Company Common Shares.  Dividends are normally payable in U.S. dollars, but
holders with a registered address in the United Kingdom and other countries
outside the United States may receive payment in another currency.  Any
dividend which is unclaimed may be invested or otherwise made use of by the
directors of the Combined Company and after a period of 12 years is forfeited
and reverts to the Combined Company.
    

               Voting Rights.  At any general meeting of the Combined Company,
votes may be given in person or by proxy and each holder of Combined Company
Common Shares is entitled, on a show of hands, to one vote and, on a poll, to
one vote for each Combined Company Common Share held by him.  Any proxy must
be a shareholder of the Combined Company.

               Liquidation.  On a liquidation of the Combined Company, holders
of Combined Company Common Shares are entitled to receive any assets remaining
after the payment of the Combined Company's debts and the expenses of the
liquidation, subject to such special rights as may be attached to any other
class of shares.

   
               Suspension of Rights.  In certain circumstances, the rights of
a shareholder to vote and to receive any payment or income or capital in
respect of a Combined Company Common Share may be suspended.  Those
circumstances include failure to provide information about ownership of and
other interests in Combined Company Common Shares, if so required in
accordance with the Combined Company Bye-Laws.  See "Comparison of Shareholder
Rights--Comparison of Current Tyco Shareholder Rights and Rights of Combined
Company Shareholders Following the Merger--Voting Rights."

               Variation of Rights.  If at any time the share capital of the
Combined Company is divided into different classes of shares, the rights
attached to any class (unless otherwise provided by the terms of the issue of
the shares of that class) may be varied with the consent in writing of the
holders of three-fourths of the issued shares of that class or with the
sanction of a resolution passed at a separate general meeting of the holders of
the shares of that class by a majority of three-fourths of such holders voting
in person or by proxy.

               Transfers.  A Combined Company Common Share may be transferred
in any manner the Combined Company Board may approve.  The board may require
the transfer to be by an instrument signed by the transferor and, in the case
of a partly paid share, also by the transferee.  The instrument must be in
writing in the usual common form or in any other form which the board may
approve and must be lodged at the office of the registrar of the Combined
Company for registration.  The Combined Company Board may decline to register
any transfer of shares on which the Combined Company has a lien, any transfer
of shares not fully paid up to a transferee of whom they do not approve and
any transfer of shares by a transferor or to a transferee on whom the Combined
Company has duly served a notice under the provisions of the Combined Company
Bye-Laws described under "--Suspension of Rights" above, during a period of
suspension of voting rights.

               General.  The outstanding ADT Common Shares are, and those
Combined Company Common shares to be issued pursuant to the Merger will be,
duly authorized, validly issued, fully paid and non-assessable.  All such
shares are, or will be, in registered form.  AS&K Services Limited will be the
Combined Company's Registrar and _____________ will be the transfer agent for
the Combined Company Common Shares.
    

Combined Company Preference Shares

               As of March 24, 1997, no Preference Shares were issued or
outstanding.  Under the Combined Company Bye-Laws, the Combined Company Board,
in its sole discretion, may designate, allot and issue one or more series of
First Preference Shares from the authorized and unissued First Preference
Shares.  Subject to limitations imposed by law, the Combined Company
Memorandum or the Combined Company Bye-Laws, the board is empowered to
determine the designation of, and the number of shares constituting, each
series of First Preference Shares, the dividend rate for each series, the
terms and conditions of any voting and conversion rights for each series, the
amounts payable on each series on redemption or return of capital and the
preference and relative rights among each series of First Preference Shares.
At present, 2,500,000 First Preference Shares have been designated as Series A
First Preference Shares and are reserved for issue upon exercise of the Rights.

               ADT currently has in place the ADT Shareholders Rights Plan.
Pursuant to the Merger Agreement, it is a condition to the Merger that, at
Tyco's election (to be communicated to ADT not less than fifteen business days
before the ADT Meeting), either ADT shall have amended the ADT Shareholder
Rights Plan to affirmatively provide that the Rights shall not be exercisable
as a result of the Merger or ADT shall have redeemed or otherwise terminated
all outstanding Rights.

Stock Exchange Listing; Delisting of Tyco Common Shares

   
               It is a condition to the Merger that the Combined Company
Common Shares issuable in the Merger be approved for listing on the NYSE at or
prior to the Effective Time, subject to official notice of issuance.  If the
Merger is consummated, Tyco Common Shares will cease to be listed on the NYSE.
Application will also be made to list the Combined Company Common Shares
issuable in the Merger on the London Stock Exchange and the Bermuda Stock
Exchange.
    


                                 LEGAL MATTERS

               The validity of the Combined Company Common Shares to be issued
to Tyco shareholders pursuant to the Merger will be passed upon by Appleby
Spurling & Kempe, Hamilton, Bermuda, special counsel to ADT.  Certain other
legal matters in connection with the Merger will be passed upon for Tyco by
Kramer, Levin, Naftalis & Frankel, New York, New York.  Joshua M. Berman, a
director and secretary of Tyco, is counsel to Kramer, Levin, Naftalis &
Frankel and owns 36,000 Tyco Common Shares.  Certain legal matters in
connection with the Merger will be passed upon for ADT by Davis Polk &
Wardwell, New York, New York, Allen & Overy, London, United Kingdom and
Appleby Spurling & Kempe, Hamilton, Bermuda.

                                    EXPERTS

               The consolidated financial statements of Tyco incorporated in
this Joint Proxy Statement/Prospectus by reference to the Annual Report on
Form 10-K of Tyco as of June 30, 1996 and 1995 and for the three years in the
period ended June 30, 1996 have been incorporated herein in reliance on the
report of Coopers & Lybrand L.L.P., independent accountants, given on the
authority of that firm as experts in accounting and auditing.

   
                The consolidated financial statements and consolidated
financial statement schedules of ADT and its subsidiaries as at December 31,
1996 and 1995, and for the years ended December 31, 1996, 1995 and 1994, have
been incorporated by reference in this Joint Proxy Statement/Prospectus in
reliance upon the report of Coopers & Lybrand, independent accountants,
incorporated by reference herein, and given upon the authority of that firm as
experts in accounting and auditing.
    


                         FUTURE SHAREHOLDER PROPOSALS

   
               Shareholder proposals intended to be considered for action at
the 1997 Annual General Meeting of ADT are required to be received by ADT a
reasonable time before the circulation of the proxy statement and form of
proxy relating to such meeting for review and consideration for inclusion in
such proxy materials.
    

               SEC rules set forth standards as to what shareholder proposals
are required to be included in a proxy statement for an annual meeting.


                      WHERE YOU CAN FIND MORE INFORMATION

               Tyco and ADT file annual, quarterly and special reports, proxy
statements and other information with the SEC.  You may read and copy any
reports, statements or other information we file at the SEC's public reference
rooms in Washington, D.C., New York, New York and Chicago, Illinois.  Please
call the SEC at 1-800-SEC-0330 for further information on the public reference
rooms.  The SEC filings of Tyco and ADT are also available to the public from
commercial document retrieval services and at the web site maintained by the
SEC at "http://www.sec.gov."

   
               ADT filed a Registration Statement on Form S-4 to register with
the SEC the Combined Company Common Shares to be issued to Tyco shareholders
in the Merger.  This Joint Proxy Statement/Prospectus is a part of that
Registration Statement and constitutes a prospectus of ADT in addition to
being a proxy statement of ADT and Tyco for the Meetings.  As allowed by SEC
rules, this Joint Proxy Statement/Prospectus does not contain all the
information you can find in the Registration Statement or the exhibits to the
Registration Statement.
    

               The SEC allows Tyco and ADT to "incorporate by reference"
information into this Joint Proxy Statement/Prospectus, which means that they
can disclose important information to you by referring you to another document
filed separately with the SEC.  The information incorporated by reference is
deemed to be part of this Joint Proxy Statement/Prospectus, except for any
information superseded by information in this Joint Proxy
Statement/Prospectus.  This Joint Proxy Statement/Prospectus incorporates by
reference the documents set forth below that Tyco and ADT have previously
filed with the SEC.  These documents contain important information about Tyco
and ADT and their finances.






Tyco SEC Filings (File No. 1-5482)       Period
- ---------------------------------        -------------------------------
Annual Report on Form 10-K               Year ended June 30, 1996
Quarterly Reports on Form 10-Q           Quarters ended September 30, 1996
                                         and December 31, 1996
Current Reports on Form 8-K              Filed on October 29, 1996,
                                         March 4, 1997, March 25, 1997 and
                                         March 28, 1997

   
ADT SEC Filings (File No. 0-16979)       Period
- ----------------------------------       -------------------------------
Annual Report on Form 10-K               Year ended December 31, 1996
Current Reports on Form 8-K              Filed on March 25, 1997
The description of ADT Common Shares     Filed August 8, 1991
set forth in the Registration
Statement on Form 8-A


               Tyco and ADT are also incorporating by reference additional
documents that they file with the SEC between the date of this Joint Proxy
Statement/Prospectus and the date of the Meetings.
    

               Tyco has supplied all information contained or incorporated by
reference in this Joint Proxy Statement/Prospectus relating to Tyco, and ADT
has supplied all such information relating to ADT.

               If you are a shareholder, Tyco and ADT may have sent you some
of the documents incorporated by reference, but you can obtain any of them
through Tyco, ADT or the SEC.  Documents incorporated by reference are
available from Tyco and ADT without charge.  Exhibits to the documents will
not be sent, however, unless those exhibits have specifically been
incorporated by reference as exhibits in this Joint Proxy
Statement/Prospectus.  Shareholders may obtain documents incorporated by
reference in this Joint Proxy Statement/Prospectus by requesting them in
writing or by telephone from the appropriate party at the following address:

Tyco International Ltd.                     ADT Limited
One Tyco Park                               Cedar House
Exeter, New Hampshire 03833                 41 Cedar Avenue
USA                                         Hamilton HM12, Bermuda
(603) 778-9700                              (441) 295-2244



   
               If you would like to request documents from Tyco or ADT, please
do so by __________, 1997 to receive them before the Meetings.

               You should rely only on the information contained or
incorporated by reference in this Joint Proxy Statement/Prospectus to vote on
the Tyco Merger Proposal and the ADT Merger Proposals.  Tyco and ADT have not
authorized anyone to provide you with information that is different from what
is contained in this Joint Proxy Statement/Prospectus.  This Joint Proxy
Statement/Prospectus is dated May __, 1997.  You should not assume that the
information contained in the Joint Proxy Statement/Prospectus is accurate as
of any date other than such date, and neither the mailing of this Joint Proxy
Statement/Prospectus to shareholders nor the issuance of Combined Company
Common Shares in the Merger shall create any implication to the contrary.
    






                             LIST OF DEFINED TERMS


   

                                                                         Page
Defined Term                                                              No.
- ------------                                                             ----

10-Day Reference Price......................................................65
1933 Act....................................................................32
1994 Restricted Stock Plan..................................................58
A Warrant...................................................................58
acquirer...................................................................114
Acquisition Proposal........................................................59
Act.........................................................................21
Adjusted Case...............................................................45
ADT.........................................................................13
ADT Automotive..............................................................88
ADT Board...................................................................15
ADT Bye-Laws................................................................18
ADT Common Shares...........................................................14
ADT Group...................................................................94
ADT Group Plan..............................................................94
ADT Investments.............................................................19
ADT Investments II..........................................................20
ADT Management Case.........................................................45
ADT Meeting.................................................................13
ADT Memorandum..............................................................58
ADT Merger Proposals........................................................15
ADT Name Change.............................................................15
ADT Name Change Proposal....................................................15
ADT Operations..............................................................22
ADT Public Comparables......................................................50
ADT SERP....................................................................56
ADT Security................................................................56
ADT Shareholders Rights Plan................................................18
ADT's Base Case.............................................................48
ADT's Closing Price.........................................................49
ADT's Sensitivity Case......................................................48
Alternative Transaction.....................................................65
Annual Meeting..............................................................17
Antitrust Division..........................................................30
APB Opinion No. 16..........................................................27
ASH..........................................................................9
Bermuda Court...............................................................21
B Warrant...................................................................58
beneficial ownership........................................................89
Business Combination.......................................................113
Carlisle....................................................................72
CCP.........................................................................22
Change in Control...........................................................96
Change of Control Proposal..................................................60
Chase.......................................................................22
City Code..................................................................113
Code........................................................................30
Combined Company............................................................13
Combined Company Board......................................................27
Combined Company Bye-Laws..................................................107
Combined Company Common Shares..............................................13
Combined Company Memorandum................................................107
Conservative Case...........................................................45
Continuing Director.........................................................19
Convertible Preference Shares..............................................117
Court.......................................................................20
Credit Suisse First Boston..................................................16
Credit Suisse First Boston Opinion..........................................44
Daily Per Share Price.......................................................65
DCF Implied Exchange Ratio..................................................51
Dissenting shareholder.....................................................115
Earth Tech..................................................................72
EBIT........................................................................49
EBITA.......................................................................50
EBITA Terminal Value Methodology............................................50
EBITDA......................................................................46
EBITDA Terminal Value Methodology...........................................50
EC Commission...............................................................30
Effective Time..............................................................15
EPS.........................................................................47
Exchange Act................................................................20
Exchange Agent..............................................................58
Exchange Ratio..............................................................24
Exchangeable Preference Shares.............................................117
Expected Synergies..........................................................48
Expenses....................................................................65
February 1997 Offering......................................................47
Fee.........................................................................65
Final 10-Day Reference Price................................................64
First Call..................................................................49
First Preference Shares....................................................117
FMR.........................................................................89
Franchisor..................................................................97
FTC.........................................................................30
Grinnell....................................................................71
High Synergy Case...........................................................52
HSR Act.....................................................................18
I/B/E/S.....................................................................49
Implied Price...............................................................49
interested shareholder.....................................................114
KCP&L.......................................................................18
Kansas Court................................................................20
Kendall......................................................................8
Laidlaw Group...............................................................96
Low Synergy Case............................................................52
LTM.........................................................................50
LYONs.......................................................................17
March 17 Engagement Letter..................................................53
March 3rd Press Release.....................................................18
Market Capitalization.......................................................50
Market Value................................................................50
Meetings....................................................................13
Merger......................................................................15
Merger Agreement............................................................13
Merger Subsidiary...........................................................13
Merrill Lynch...............................................................17
Merrill Lynch Opinion.......................................................47
Named Officers..............................................................91
New ADT Common Shares.......................................................15
New Directors Election......................................................15
New Directors Proposal......................................................15
NYSE........................................................................13
Notes.......................................................................26
Offer Value.................................................................51
Other ADT Meeting Proposals.................................................15
P/E Growth Multiple.........................................................49
P/E Ratio...................................................................49
pension plans...............................................................93
Plan Amendment..............................................................17
Preference Shares..........................................................117
ProMed......................................................................73
Program Cars................................................................82
Recapitalization Proposal...................................................15
Reference Price.............................................................49
Related Person.............................................................112
Remuneration Committee......................................................96
Republic....................................................................17
Republic Merger.............................................................17
Republic Warrant............................................................17
Reverse Stock Split.........................................................15
Reverse Stock Split Proposal................................................15
Reverse Stock Split Ratio...................................................15
Rights......................................................................19
Rights Plan Amendment.......................................................19
Rule 145....................................................................32
S&P 500.....................................................................45
SARs.......................................................................114
SEC..........................................................................8
Security Services...........................................................45
Selected Acquisitions.......................................................51
Senior Notes................................................................26
Senior Subordinated Notes...................................................26
Severance Change in Control.................................................96
Share Amendment.............................................................15
Share Amendment Proposal....................................................15
Simplex.....................................................................75
SFAS 121.....................................................................9
STAT Resources..............................................................79
Supplemental Benefit Agreement..............................................56
Surviving Corporation.......................................................15
Take-Over Bid..............................................................114
Third Party.................................................................65
Thorn.......................................................................71
Transaction Value...........................................................51
transferee company.........................................................114
transferor company.........................................................114
Tyco........................................................................13
Tyco Articles...............................................................59
Tyco Board..................................................................15
Tyco Bylaws.................................................................59
Tyco Common Shares..........................................................13
Tyco Meeting................................................................13
Tyco Merger Proposal........................................................67
Tyco Option Plan............................................................57
Tyco Plans..................................................................57
Tyco Public Comparables.....................................................51
Tyco Stock Option...........................................................57
Tyco's Base Case............................................................48
Tyco's Closing Price........................................................49
Tyco's Sensitivity Case.....................................................48
U.S. GAAP...................................................................35
UL..........................................................................79
Warrants....................................................................58
WCI.........................................................................20
Western.....................................................................16
Western/KCP&L Merger Agreement..............................................18
Western Offer...............................................................16
Western Proposals...........................................................18
Western Proposals Meeting...................................................18
Western S-4.................................................................18
Western Schedule 13D........................................................17
Wormald.....................................................................71



                                                                       ANNEX I

                         [AGREEMENT AND PLAN OF MERGER

                                 BY AND AMONG

                                 ADT LIMITED,

                             LIMITED APACHE, INC.

                                      and

                            TYCO INTERNATIONAL LTD.

                          Dated as of March 17, 1997]





                                                                      ANNEX II

              [Opinion of Credit Suisse First Boston Corporation]





                                                                     ANNEX III

        [Opinion of Merrill Lynch, Pierce Fenner & Smith Incorporated]





                                                                      ANNEX IV


                        PROVISIONS OF MASSACHUSETTS LAW

                    GOVERNING SHAREHOLDER APPRAISAL RIGHTS


                    Massachusetts Business Corporation Law

                                Sections 85-98

                               Appraisal Rights

Section   85. Dissenting stockholder; right to demand payment for stock;
      exception

   A stockholder in any corporation organized under the laws of Massachusetts
which shall have duly voted to consolidate or merge with another corporation
or corporations under the provisions of sections seventy-eight or seventy-nine
who objects to such consolidation or merger may demand payment for his stock
from the resulting or surviving corporation and an appraisal in accordance
with the provisions of sections eighty-six to ninety-eight, inclusive, and
such stockholder and the resulting or surviving corporation shall have the
rights and duties and follow the procedure set forth in those sections.  This
section shall not apply to the holders of any shares of stock of a constituent
corporation surviving a merger if, as permitted by subsection (c) of section
seventy-eight, the merger did not require for its approval a vote of the
stockholders of the surviving corporation.

Section  86. Selections applicable to appraisal; prerequisites

   If a corporation proposes to take a corporate action as to which any
section of this chapter provides that a stockholder who objects to such action
shall have the right to demand payment for his shares and an appraisal
thereof, sections eighty-seven to ninety-eight, inclusive, shall apply except
as otherwise specifically provided in any section of this chapter.  Except as
provided in sections eighty-two and eighty-three, no stockholder shall have
such right unless (1) he files with the corporation before the taking of the
vote of the shareholders on such corporate action, written objection to the
proposed action stating that he intends to demand payment for his shares if
the action is taken and (2) his shares are not voted in favor of the proposed
action.

Section  87. Statement of rights of objecting stockholders in notice of
meeting; form

   The notice of the meeting of stockholders at which the approval of such
proposed action is to be considered shall contain a statement of the rights of
objecting stockholders.  The giving of such notice shall not be deemed to
create any rights in any stockholder receiving the same to demand payment for
his stock, and the directors may authorize the inclusion in any such notice of
a statement of opinion by the management as to the existence or non-existence
of the right of the stockholders to demand payment for their stock on account
of the proposed corporate action.  The notice may be in such form as the
directors or officers calling the meeting deem advisable, but the following
form of notice shall be sufficient to comply with this section:

      "If the action proposed is approved by the stockholders at the meeting
   and effected by the corporation, any stockholder (1) who files with the
   corporation before the taking of the vote on the approval of such action,
   written objection to the proposed action stating that he intends to demand
   payment for his shares if the action is taken and (2) whose shares are not
   voted in favor of such action has or may have the right to demand in
   writing from the corporation (or, in the case of a consolidation or merger,
   the name of the resulting or surviving corporation shall be inserted),
   within twenty days after the date of mailing to him of notice in writing
   that the corporate action has become effective, payment for his shares and
   an appraisal of the value thereof.  Such corporation and any such
   stockholder shall in such cases have the rights and duties and shall follow
   the procedure set forth in sections 88 to 98, inclusive, of chapter 156B of
   the General Laws of Massachusetts."

Section  88. Notice of effectiveness of action objected to

   The corporation taking such action, or in the case of a merger or
consolidation the surviving or resulting corporation, shall, within ten days
after the date on which such corporate action became effective, notify each
stockholder who filed a written objection meeting the requirements of section
eighty-six and whose shares were not voted in favor of the approval of such
action, that the action approved at the meeting of the corporation of which he
is a stockholder has become effective.  The giving of such notice shall not be
deemed to create any rights in any stockholder receiving the same to demand
payment for his stock.  The notice shall be sent by registered or certified
mail, addressed to the stockholder at his last known address as it appears in
the records of the corporation.

Section  89. Demand for payment; time for payment

   If within twenty days after the date of mailing of a notice under
subsection (e) of section eighty-two, subsection (f) of section eighty-three,
or section eighty-eight, any stockholder to whom the corporation was required
to give such notice shall demand in writing from the corporation taking such
action, or in the case of a consolidation or merger from the resulting or
surviving corporation, payment for his stock, the corporation upon which such
demand is made shall pay to him the fair value of his stock within thirty days
after the expiration of the period during which such demand may be made.

Section  90. Demand for determination of value; bill in equity; venue

   If during the period of thirty days provided for in section eighty-nine the
corporation upon which such demand is made and any such objecting stockholder
fail to agree as to the value of such stock, such corporation or any such
stockholder may within four months after the expiration of such thirty-day
period demand a determination of the value of the stock of all such objecting
stockholders by a bill in equity filed in the superior court in the county
where the corporation in which such objecting stockholder held stock had or
has its principal office in the commonwealth.

Section  91. Parties to suit to determine value; service

   If the bill is filed by the corporation, it shall name as parties
respondent all stockholders who have demanded payment for their shares and
with whom the corporation has not reached agreement as to the value thereof.
If the bill is filed by a stockholder, he shall bring the bill in his own
behalf and in behalf of all other stockholders who have demanded payment for
their shares and with whom the corporation has not reached agreement as to the
value thereof, and service of the bill shall be made upon the corporation by
subpoena with a copy of the bill annexed.  The corporation shall file with its
answer a duly verified list of all such other stockholders, and such
stockholders shall thereupon be deemed to have been added as parties to the
bill.  The corporation shall give notice in such form and returnable on such
date as the court shall order to each stockholder party to the bill by
registered or certified mail, addressed to the last known address of such
stockholder as shown in the records of the corporation, and the court may
order such additional notice by publication or otherwise as it deems
advisable.  Each stockholder who makes demand as provided in section
eighty-nine shall be deemed to have consented to the provisions of this section
relating to notice, and the giving of notice by the corporation to any such
stockholder in compliance with the order of the court shall be a sufficient
service of process on him.  Failure to give notice to any stockholder making
demand shall not invalidate the proceedings as to other stockholders to whom
notice was properly given, and the court may at any time before the entry of a
final decree make supplementary orders of notice.

Section  92. Decree determining value and ordering payment; valuation date

   After hearing the court shall enter a decree determining the fair value of
the stock of those stockholders who have become entitled to the valuation of
and payment for their shares, and shall order the corporation to make payment
of such value, together with interest, if any, as hereinafter provided, to the
stockholders entitled thereto upon the transfer by them to the corporation of
the certificates representing such stock if certificated or, if
uncertificated, upon receipt of an instruction transferring such stock to the
corporation.   For this purpose, the value of the shares shall be determined
as of the day preceding the date of the vote approving the proposed corporate
action and shall be exclusive of any element of value arising from the
expectation or accomplishment of the proposed corporate action.

Section  93. Reference to special master

   The court in its discretion may refer to the bill or any question arising
thereunder to a special master to hear the parties, make findings and report
the same to the court, all in accordance with the usual practice in suits in
equity in the superior court.

Section  94. Notation on stock certificates of pendency of bill

   On motion the court may order stockholder parties to the bill to submit
their certificates of stock to the corporation for the notation thereon of the
pendency of the bill and may order the corporation to note such pendency in
its records with respect to any uncertificated shares held by such stockholder
parties, any may on motion dismiss the bill as to any stockholder who fails to
comply with such order.

Section  95. Costs; interest

   The costs of the bill, including the reasonable compensation and expenses
of any master appointed by the court, but exclusive of fees of counsel or of
experts retained by any party, shall be determined by the court and taxed upon
the parties to the bill, or any of them, in such manner as appears to be
equitable, except that all costs of giving notice to stockholders as provided
in this chapter shall be paid by the corporation.  Interest shall be paid upon
any award from the date of the vote approving the proposed corporate action,
and the court may on application of any interested party determine the amount
of interest to be paid in the case of any stockholder.

Section  96. Dividends and voting rights after demand for payment

   Any stockholder who has demanded payment for his stock as provided in this
chapter shall not thereafter be entitled to notice of any meeting of
stockholders or to vote such stock for any purpose and shall not be entitled
to the payment of dividends or other distribution on the stock (except
dividends or other distributions payable to stockholders of record at a date
which is prior to the date of the vote approving the proposed corporate action)
unless:

   (1) A bill shall not be filed within the time provided in section ninety;

   (2) A bill, if filed, shall be dismissed as to such stockholder; or

   (3) Such stockholder shall with the written approval of the corporation, or
in the case of a consolidation or merger, the resulting or surviving
corporation, deliver to it a written withdrawal of his objections to and an
acceptance of such corporation action.

   Notwithstanding the provisions of clauses (1) to (3), inclusive, said
stockholder shall have only the rights of a stockholder who did not so demand
payment for his stock as provided in this chapter.

Section  97. Status of shares paid for

   The shares of the corporation paid for by the corporation pursuant to the
provisions of this chapter shall have the status of treasury stock, or in the
case of a consolidation or merger the shares or the securities of the resulting
or surviving corporation into which the shares of such objecting stockholder
would have been converted had he not objected to such consolidation or merger
shall have the status of treasury stock or securities.

Section  98. Exclusive remedy; exception

   The enforcement by a stockholder of his right to receive payment for his
shares in the manner provided in this chapter shall be an exclusive remedy
except that this chapter shall not exclude the right of such stockholder to
bring or maintain an appropriate proceeding to obtain relief on the ground
that such corporate action will be or is illegal or fraudulent as to him.

                            [Front of Proxy Card]

          This proxy is solicited on behalf of the Board of Directors
                          of Tyco International Ltd.


   The undersigned hereby appoints L. Dennis Kozlowski and Mark H. Swartz, and
each of them, proxies with power of substitution to vote for and on behalf of
the undersigned at the Special Meeting of Shareholders of Tyco International
Ltd. (the "Company") to be held at____________________________________________
on June __, 1997, at __________a.m. and at any adjournment thereof, all shares
of Common Stock of record in the name of the undersigned, hereby granting full
power and authority to act on behalf of the undersigned at the said meeting,
and any adjournment thereof.

THE SHARES REPRESENTED HEREBY SHALL BE VOTED AS SPECIFIED.  IF NO
SPECIFICATION IS MADE, SUCH SHARES SHALL BE VOTED "FOR" THE APPROVAL OF THE
MERGER AND THE MERGER AGREEMENT AS SET FORTH IN THE ACCOMPANYING JOINT PROXY
STATEMENT/PROSPECTUS.

                         [Reverse of Proxy Card]

(1) Approval of the Merger of the Company with Limited Apache, Inc.
   ("Apache"), a wholly owned subsidiary of ADT Limited ("ADT"), and of the
   Agreement and Plan of Merger among ADT, Apache and the Company attached as
   Annex A to the accompanying Joint Proxy Statement/Prospectus.

      FOR  [ ]           AGAINST  [ ]      ABSTAIN  [ ]

(2) Upon such other matters which may properly come before the meeting or any
   adjournment thereof.


                                    Please sign exactly as your name appears
                                    on this card.  If shares are registered in
                                    the names of two or more persons, each
                                    should sign.  Executors, administrators,
                                    guardians, attorneys, and corporate
                                    officers should add their titles.

                                    The undersigned hereby revokes any proxy
                                    previously given and acknowledges receipt
                                    of written notice of, and the Joint Proxy
                                    Statement/Prospectus for, the Special
                                    Meeting of Shareholders.

                                    Dated:______________________________, 1997


                                    __________________________________________


                             [Front of Proxy Card]
This proxy card must be received, at the appropriate address indicated below,
 by D.F. King & Co., Inc., prior to 10:00 a.m. (Eastern Daylight Time) on
                               June __, 1997
or by D.F. King (Europe) Limited, prior to 10:00 a.m. (British Summer Time) on
                               June __, 1997,
    or by AS&K Services Limited, prior to 10:00 a.m. (Bermuda time) on
                               June __, 1997,

Proxy solicited by the Board of Directors of ADT Limited, a company organized
                          under the laws of Bermuda,
for the Special General Meeting of Shareholders to be held on June __, 1997 at
                                  10:00 a.m.,
            at Cedar House, 41 Cedar Avenue, Hamilton, Bermuda

The undersigned, being a holder of common shares, par value $0.10 per share
(the "ADT Common Shares"), of ADT Limited ("ADT"), hereby appoints Michael A.
Ashcroft or failing him Stephen J. Ruzika or failing him John D. Campbell as
his proxy at the Special General Meeting to be held on June __, 1997 (and any
adjournment thereof) and to vote on behalf of the undersigned (or abstain from
voting) as indicated on the reverse of this card or, to the extent that no
such indication is given, as set forth herein.  The Special General Meeting
has been convened to consider proposals (1) to approve the issuance of ADT
Common Shares in the merger (the "Merger") of ADT and Tyco; (2) to approve a
reverse stock split of the ADT Common Shares and to increase the authorized
share capital of ADT and to approve the issuance of those shares; (3) to
expand the size of the Board of Directors to eleven, remove all but three of
the directors of ADT in office immediately prior to the Effective Time and to
elect as directors of the Combined Company eight new directors of ADT; (4) to
approve a change in the name of ADT to Tyco International Ltd. (the "Merger
Proposals"); (5) to approve certain changes to ADT's 1993 Long Term Incentive
Plan and to ratify the assumption by ADT of certain Tyco options and warrants
and the grant of existing ADT options; and (6) to approve an amendment to
Bye-Law 45 of ADT's Bye-Laws (the "Other ADT Meeting Proposals").  In their
discretion the proxies are authorized to vote upon such other business as may
properly come before the meeting or any adjournments thereof, except that in
the case of any proposal to adjourn the meeting, the proxy will vote as
indicated on the reverse of this card or, to the extent that no such
indication is given, as set forth herein.  The undersigned hereby revokes any
previously dated forms of proxy with respect to the Special General Meeting.



Please indicate on the reverse of this card how your shares are to be voted.
The ADT Board recommends a vote FOR each of the Merger Proposals and the Other
 ADT Meeting Proposals.  If this card is returned signed but not marked with
   any indication as to how to vote, the undersigned will be deemed to have
directed the proxy to vote FOR each of the Merger Proposals, FOR the Other ADT
           Meeting Proposals, FOR item no. 7 and AGAINST item no. 8.


 Completed proxy cards should be returned to: D.F. King & Co., Inc., 77 Water
          Street, 20th Floor, New York, NY 10005, USA (if by hand) or
D. F. King & Co., Inc., Wall Street Station, P.O. Box 411, New York, New York
                       10269-0069, USA (if by mail), or
  D. F. King (Europe) Limited, Royex House, Aldermanbury Square, London EC2V
                    7HR, United Kingdom (by hand or mail),
 or AS&K Services Limited, P.O. Box 1179, Hamilton HM EX, Bermuda (by hand or
                                    mail).



IF YOU HAVE QUESTIONS OR NEED ASSISTANCE, PLEASE CONTACT D.F. KING at
1-800-488-8035 (toll-free in the United States), at 0171-600-5005 (in the
United Kingdom) or at 212-269-5550 (outside the United States and the United
Kingdom)

                            [Reverse of Proxy Card]

I.  Merger Proposals

    THE BOARD OF DIRECTORS OF ADT LIMITED RECOMMENDS THAT YOU VOTE
    FOR EACH OF THE MERGER PROPOSALS.


1.    To approve the issuance of ADT Common Shares to Tyco shareholders
      in connection with the merger (the "Merger") of ADT and Tyco
                      [ ] FOR [ ] AGAINST [ ] ABSTAIN

2.    To approve the reverse stock split and to increase the
      authorized number of ADT Common Shares and to approve
      the issuance of those shares
                     [ ] FOR [ ] AGAINST  [ ] ABSTAIN

3.    To expand the size of the Board of Directors to eleven, remove all but
      three of the directors of ADT in office immediately prior to the Merger
      and to elect the nominees of the ADT Board as directors of the
      Combined Company.
                      [ ] FOR [ ] AGAINST [ ] ABSTAIN

4.    To approve a change in the name of ADT to Tyco International Ltd.
                     [ ] FOR  [ ] AGAINST [ ] ABSTAIN

EACH OF RESOLUTIONS 1 THROUGH 4 IS CONDITIONAL UPON THE MERGER BECOMING
EFFECTIVE

II.  Other ADT Meeting Proposals

      THE BOARD OF DIRECTORS OF ADT LIMITED RECOMMENDS THAT YOU VOTE FOR ITEMS
      5 AND 6.


5.    To approve amendments to the ADT Limited 1993 Long Term Incentive
      Plan and to ratify and approve the grant of all share options pursuant
      to that plan and the Company's other share option and incentive plans
      and, subject to the Merger becoming effective, the assumption by the
      Company of Tyco's obligations under its share option and incentive
      plans and warrants.
                    [ ] FOR   [ ] AGAINST   [ ] ABSTAIN


6.    To approve an amendment to Bye-Law 45,
      subject to proposals 1 through 4 above being approved.
                  [ ] FOR    [ ] AGAINST     [ ] ABSTAIN

III.  Proposal to Adjourn the Special General Meeting

      THE BOARD OF DIRECTORS OF ADT LIMITED RECOMMENDS THAT YOU VOTE FOR ITEM
      NO. 7 AND AGAINST ITEM NO. 8.

7.    Proposal to adjourn the Special General Meeting to a later date which is
      proposed or recommended by the Chairman of the Special General Meeting.
                    [ ] AGAINST [ ] FOR     [ ] ABSTAIN

8.    Proposal to adjourn the Special General Meeting to a later date which is
      not proposed or recommended by the Chairman of the Special General
      Meeting.
                    [ ] AGAINST [ ] FOR     [ ] ABSTAIN



                                Date:__________________________________, 1997

                                _____________________________________________
                                             Signature
                                         (and Title, if any)

                                _____________________________________________
                                             Signature
                                         (and Title, if any)


                                Please sign your name above exactly as it
                                appears hereon.  When signing as attorney,
                                executor, administrator, trustee or other
                                representative capacity, please give full
                                title as such.  If a corporation, please
                                sign in full corporate name by a duly
                                authorized director or other officer,
                                indicating title, or execute under the
                                corporation's common seal.  In the case of
                                joint holders, any one may sign but the
                                first-named in the share register may
                                exclude the voting rights of the other
                                joint holder(s) by voting in person or by
                                proxy.







                          TYCO INTERNATIONAL LTD.

                      SPECIAL MEETING OF SHAREHOLDERS


               To the Shareholders of Tyco International Ltd.:

               A Special Meeting of Shareholders of Tyco International Ltd., a
Massachusetts corporation ("Tyco"), will be held at ____________ on June __,
1997 at 9:00 a.m. for the purposes of voting upon a proposal to approve an
Agreement and Plan of Merger, dated as of March 17, 1997 (the "Merger
Agreement"), among ADT Limited, Tyco and Limited Apache, Inc., a Massachusetts
corporation and a wholly-owned subsidiary of ADT (the "Merger Subsidiary"),
and to approve the merger (the "Merger") of Merger Subsidiary with and into
Tyco.  In the Merger, Tyco shareholders will receive one common share of the
combined company for each of their current Tyco common shares.  As a result of
a reverse stock split, each existing ADT share will become 0.48133 of a
combined company common share (subject to adjustment under certain
circumstances) after the Merger.  The ADT common shares to be issued to Tyco
shareholders in the Merger will represent approximately 64% of the outstanding
combined company common shares after the Merger.  Shares held by ADT
shareholders before the Merger will represent approximately 36% of the
outstanding combined company common shares after the Merger.  A copy of the
Merger Agreement is attached as Annex I to the Joint Proxy
Statement/Prospectus accompanying this Notice.

               The Board of Directors has fixed the close of business on
May__, 1997 as the record date for the determination of the holders of Tyco's
Common Stock entitled to notice of, and to vote at, the meeting.  The Merger
and other related matters are more fully described in the accompanying Joint
Proxy Statement/Prospectus, and the annexes thereto, which form a part of this
Notice.

               If the Merger Agreement is approved and the Merger becomes
effective, any Tyco shareholder (i) who files with Tyco, before the taking of
the vote on the approval of the Merger Agreement, written objection to the
proposed Merger stating that he or she intends to demand payment for his or
her Tyco shares if the Merger Agreement is approved, and (ii) whose Tyco
shares are not voted in favor of the Merger Agreement, has or may have the
right to demand in writing from Tyco, within twenty days after the date of
mailing to him or her of notice in writing that the Merger has become
effective, payment for his or her Tyco shares and an appraisal of the value
thereof. Tyco and any such holder shall in such cases have the rights and
duties and shall follow the procedures set forth in Sections 88 through 98,
inclusive, of Chapter 156B of the General Laws of Massachusetts. See "The
Merger--Appraisal Rights" in the accompanying Joint Proxy Statement/Prospectus
for a statement of the rights of dissenting holders and a description of the
procedures required to be followed in order to perfect appraisal rights. Annex
IV to the accompanying Joint Proxy Statement/Prospectus sets forth the text of
Sections 85 through 98 of Chapter 156B of the General Laws of Massachusetts.

               ALL SHAREHOLDERS ARE CORDIALLY INVITED TO ATTEND THE MEETING.
TO ENSURE YOUR REPRESENTATION AT THE MEETING, HOWEVER, YOU ARE URGED TO
COMPLETE, DATE, SIGN AND RETURN THE ENCLOSED PROXY AS PROMPTLY AS POSSIBLE.  A
POSTAGE-PREPAID ENVELOPE IS ENCLOSED FOR THAT PURPOSE.  ANY SHAREHOLDER
ATTENDING THE MEETING MAY VOTE IN PERSON EVEN IF THAT SHAREHOLDER HAS RETURNED
A PROXY.

                                          By Order of the Board of Directors


                                          David P. Brownell
                                          Clerk



May __, 1997



                                ADT LIMITED

                     NOTICE OF SPECIAL GENERAL MEETING

               Notice is hereby given that a Special General Meeting of ADT
Limited (the "Company") will be held on June __, 1997 at 10:00 a.m., local
time, at Cedar House, 41 Cedar Avenue, Hamilton HM12, Bermuda for the
purpose of considering and voting upon resolutions in a form approved by the
Board of Directors to the following effect, each of the resolutions relating
to items 1 through 4 below to be conditional upon the merger (the "Merger") of
Limited Apache, Inc., a wholly-owned subsidiary of the Company, with Tyco
International Ltd. ("Tyco") becoming effective:

1. Subject to the resolution relating to the consolidation and increase of
   share capital referred to in 2 below being duly passed, to authorize the
   Directors to issue Common Shares of US$0.20 each in the capital of the
   Company resulting from such consolidation and increase ("New Common
   Shares") in connection with the Merger.

2. To approve or authorize:

               (a) the consolidation and division of the existing Common
      Shares of US$0.10 each in the capital of the Company ("Existing Common
      Shares") into New Common Shares but on terms that holders of Existing
      Common shares in issue immediately before the effective time of the
      Merger will be entitled to such number of New Common shares for each
      Existing Common Share as is determined in accordance with the Reverse
      Stock Split Ratio (subject to any applicable adjustment) described in
      the joint proxy statement/prospectus of Tyco and the Company dated May
      __, 1997, all fractional entitlements being canceled for cash equal to
      the value thereof;

               (b) an increase in the authorized share capital of the Company
      by the creation of (i) a number of New Common Shares equal in nominal
      value to the aggregate nominal value of fractional entitlements so
      canceled and contemporaneously with such cancellation and (ii) an
      additional 640,000,000 New Common Shares;

               (c) the issue or other disposal by the Directors of all the New
      Common Shares resulting from such consolidation and increase of capital,
      to the extent such shares are not issued in connection with the Merger;
      and

               (d) amendments to the Bye-Laws of the Company consequential
      upon (a) and (b) above.

3. To increase the number of Directors to eleven, to remove all but three of
   the current Directors and to elect up to eight additional Directors of the
   Company nominated by the Board of Tyco, to serve until the next Annual
   General Meeting of the Company.

4. To approve the change of the Company's name to Tyco International Ltd.

5. To approve amendments to the ADT Limited 1993 Long Term Incentive Plan and
   to ratify and approve the grant of all share options pursuant to that plan
   and the Company's other share option and incentive plans and, subject to
   the Merger becoming effective, the assumption by the Company of Tyco's
   obligations under its share option and incentive plans and warrants.

6. Subject to the resolutions relating to items 1 through 4 above being duly
   passed, to approve an amendment to Bye-Law 45 (power to adjourn general
   meeting) of the Bye-Laws of the Company as described in the joint proxy
   statement/prospectus of the Company and Tyco dated May __, 1997.

By Order of the Board of Directors
John D. Campbell, Secretary
41 Cedar Avenue
Hamilton HM12
Bermuda

May __, 1997

Notes:
1. A shareholder is entitled to appoint a proxy to attend and vote at the
   meeting on his behalf.  A proxy must be a shareholder.

2. Forms of proxy should be signed, dated and returned as soon as possible in
   accordance with the notes on them. To be valid, forms of proxy must be
   received not less than [   ] hours before the time of the meeting.
    


           PART II   INFORMATION NOT REQUIRED IN THE PROSPECTUS

Item 20. Indemnification of Directors and Officers.

               Section 103 of the ADT Bye-Laws provides, in part, that ADT
shall indemnify its directors and officers for all costs, losses and
expenses which they may incur in the performance of their duties as
director or officer, provided that such indemnification is not otherwise
prohibited under the Companies Act 1981 (as amended) of Bermuda.  Section
98 of the Companies Act 1981 (as amended) prohibits such indemnification
against any liability arising out of the fraud or dishonesty of the
director or officer.  However, such section permits ADT to indemnify a
director or officer against any liability incurred by him in defending any
proceedings, whether civil or criminal, in which judgement is given in his
favor or in which he is acquitted or when other similar relief is granted
to him.

               ADT maintains liability insurance covering its directors and
officers and those of its subsidiaries.

Item 21. Exhibits and Financial Statement Schedules.

               2.1 - Agreement and Plan of Merger by and among ADT Limited,
         Limited Apache, Inc. and Tyco International Ltd. dated as of March
         17, 1997.(1)

               4.1 - Indenture relating to the senior notes dated August 4,
         1993 among ADT Operations, as issued, and ADT Limited and certain
         subsidiaries of ADT Operations, as guarantors, and The Chase Manhattan
         Bank (National Association), as trustee, and the form of senior notes
         included therein.(2)

               4.2 - Indenture relating to the senior subordinated notes dated
         August 4, 1993 among ADT Operations, as issuer, and ADT Limited, as
         guarantor, and NationsBank of Georgia, National Association, as
         trustee, and the form of senior subordinated note included
         therein.(2)

               4.3 - Indenture dated as of July 1, 1995 among ADT Operations,
         Inc., ADT Limited and Bank of Montreal Trust Company, as trustee and
         the form of note included therein.(3)

               4.4 - Rights Agreement between ADT Limited and Citibank, N.A.
         dated as of November 6, 1996.(4)

               4.5 - First Amendment between ADT Limited and Citibank, N.A.
         dated as of March 3, 1997 to Rights Agreement between ADT Limited and
         Citibank, N.A. dated as of November 6, 1996.(5)

   
               5.1 - Opinion of Appleby, Spurling & Kempe regarding the
         validity of the Combined Company Common Shares to be issued to the
         Tyco Shareholders.  (filed herewith)

               8.1 - Opinion of Kramer, Levin, Naftalis & Frankel regarding
         tax matters. (filed herewith)

               8.2 - Opinion of Davis Polk & Wardwell regarding tax matters.
         (filed herewith)

               8.3 - Opinion of Allen & Overy regarding tax matters.  (filed
         herewith)

               8.4 - Opinion of Appleby, Spurling & Kempe regarding tax
         matters.  (filed herewith)

               10.1 - ADT Limited 1993 Long Term Incentive Plan (as amended
         _____________, 1997).  (filed herewith)

                23.1 - Consent of independent accountants to the incorporation
         by reference of the ADT Annual Report on Form 10-K into Form S-4.
         (filed herewith)

               23.2 - Consent of independent accountants to the incorporation
         by reference of the Tyco Annual Report on Form 10-K into Form S-4.
         (filed herewith)

               23.3 - Consent of Appleby, Spurling & Kempe. (included in
         Exhibit 5.1)

               23.4 - Consent of Kramer, Levin, Naftalis & Frankel. (included
         in Exhibit 8.1)

               23.5 - Consent of Davis Polk & Wardwell. (included in Exhibit
         8.2)

               24.1 - Powers of Attorney*

- ------------
(1) Previously filed as an Exhibit to ADT's Current Report dated March 24,
   1997 on Form 8-K filed March 25, 1997.

(2) Previously filed as an Exhibit to ADT's Quarterly Report on Form 10-Q for
   the quarter ended June 30, 1993.

(3) Previously filed as an Exhibit to ADT's Quarterly Report on Form 10-Q for
   the quarter ended June 30, 1995.

(4) Previously filed as an Exhibit to ADT's Form 8-A dated November 12, 1996.

(5) Previously filed as an Exhibit to ADT's Form 8-A/A dated March 3, 1997.

*  Previously filed
    



Item 22. Undertakings.

               Insofar as indemnification for liabilities arising under the
1933 Act, as amended, may be permitted to directors, officers, and controlling
persons of the Registrant pursuant to the foregoing provisions, or otherwise,
the Registrant has been advised that in the opinion of the SEC such
indemnification is against public policy as expressed in the 1933 Act and is,
therefore, unenforceable.  In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses
incurred or paid by a director, officer, or controlling person of the
Registrant in the successful defense of any action, suit or proceeding) is
asserted by such director, officer, or controlling person in connection with
the securities being registered, the Registrant will, unless in the opinion of
its counsel the matter has been settled by controlling precedent, submit to a
court of appropriate jurisdiction the question whether such indemnification by
it is against public policy as expressed in the Act and will be governed by
the final adjudication of such issue.

               The undersigned Registrant hereby undertakes as follows:

   
               (1)  Prior to any public reoffering of the securities
registered hereunder through use of a prospectus which is a part of this
Registration Statement, by any person or party which is deemed to be an
underwriter within the meaning of Rule 145(c) under the 1933 Act, such
reoffering prospectus will contain the information called for by the
applicable registration form with respect to reofferings by persons who may be
deemed underwriters, in addition to the information called for by the other
items of the applicable form.

               (2)  Every prospectus (i) that is filed pursuant to paragraph
(1) immediately preceding, or (ii) that purports to meet the requirements of
Section 10(a)(3) of the 1933 Act and is used in connection with an offering of
securities subject to Rule 415 under the 1933 Act, will be filed as a part of
an amendment to the Registration Statement and will not be used until such
amendment is effective, and that, for purposes of determining any liability
under the 1933 Act, each such post-effective amendment shall be deemed to be a
new registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial
bona fide offering thereof.
    

               The undersigned Registrant hereby undertakes to respond to
requests for information that is incorporated by reference into the prospectus
pursuant to Item 4, 10(b), 11, or 13 of this form, within one business day of
receipt of such request, and to send the incorporated documents by first class
mail or other equally prompt means.  This includes information contained in
documents filed subsequent to the effective date of the registration statement
through the date of responding to the request.  The undersigned Registrant
hereby further undertakes to supply by means of a post-effective amendment all
information concerning a transaction, and the company being acquired involved
therein, that was not the subject of or included in the registration statement
when it became effective.




                                  SIGNATURES

   
               PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE
REGISTRANT HAS DULY CAUSED THIS AMENDMENT NO. 1 TO THE REGISTRATION STATEMENT
TO BE SIGNED ON ITS BEHALF BY THE UNDERSIGNED PERSON, THEREUNTO DULY
AUTHORIZED, IN THE CITY OF BOCA RATON, STATE OF FLORIDA, ON MAY 9, 1997.
    

                                          ADT LIMITED




                                          By:/s/Stephen J. Ruzika
                                             ------------------------------
                                             Name: Stephen J. Ruzika
                                             Title: Chief Financial Officer


   
               PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933,
THIS AMENDMENT NO. 1 TO THE REGISTRATION STATEMENT HAS BEEN SIGNED BY THE
FOLLOWING PERSONS IN THE CAPACITIES INDICATED ON MAY 9, 1997.
    

        SIGNATURE                             TITLE
        ---------                             -----
   

  *
- -----------------------------       Chairman of the Board of Directors
Michael A. Ashcroft                 and Chief Executive Officer (Principal
                                    Executive Officer)

 /s/ Stephen J. Ruzika
- -----------------------------       Chief Financial Officer (Principal
Stephen J. Ruzika                   Financial Officer and Principal
                                    Accounting Officer)
  *
- -----------------------------       Director
John E. Danneberg

  *
- -----------------------------       Director
Alan B. Henderson

  *
- -----------------------------       Director
James S. Pasman, Jr.

  *
- -----------------------------       Director
W. Peter Slusser

  *
- -----------------------------       Director
William W. Stinson

  *
- -----------------------------       Director
Raymond S. Troubh

*By:    /s/ Stephen J. Ruzika
- -----------------------------
      Stephen J. Ruzika
      Attorney-in-Fact
    



   
                                                                   Exhibit 5.1


                   [LETTERHEAD OF APPLEBY, SPURLING & KEMPE]


                                                        _______________, 1997




Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C.  20549
U.S.A.

ADT Limited
Cedar House
41 Cedar Avenue
Hamilton HM12, Bermuda


      Re: Registration Statement on Form S-4
         Registration No. 333-24363

Ladies and Gentlemen:

               We have acted as attorneys in Bermuda for ADT Limited, a
Bermuda limited liability company ("ADT") in connection with the proposed
merger of Limited Apache, Inc., a Massachusetts corporation and a wholly owned
subsidiary of ADT into Tyco International Ltd ("Tyco") pursuant to the
Agreement and Plan of Merger dated as of March 17, 1997 among Tyco, ADT and
Merger Subsidiary (the "Merger Agreement").

               This opinion is based upon and confined to the laws of Bermuda
presently in force as currently applied by the Courts of Bermuda.  We have
made no investigation of, nor do we express any opinion as to, the laws of any
jurisdiction other than Bermuda.

               In order to render this opinion, we have been supplied with and
have reviewed and relied upon the following documents:

      (a) the Certificate of Incorporation, Memorandum of Association and
      Bye-laws of ADT;

      (b) a copy, certified by [Mr. Stephen Ruzika], a Director of the Company
      of the resolutions adopted by the Board of Directors of the Company at a
      meeting held on March 16, 1997 (the "Resolutions"); and

      (c) a copy of the Joint Proxy Statement/Prospectus (the "Joint Proxy
      Statement/Prospectus") that is part of the Registration Statement on
      Form S-4 (Registration No. 333-24363) filed by ADT and Tyco with the
      Securities and Exchange Commission.

               We have also relied upon our searches of documents of public
record maintained by the Registrar of Companies in Bermuda and of the Causes
Book of the Supreme Court of Bermuda made on May [__], 1997 (the "Searches").

               We have assumed:

         (i) that there is no provision of the law, regulation or public
      policy of any jurisdiction, other than Bermuda, which might have a
      material effect on any of the opinions herein expressed;

         (ii) that all matters of fact appearing in the Resolutions and the
      Joint Proxy Statement/Prospectus are true and complete in all material
      respects;

         (iii) the genuineness of all signatures on each of the documents
      examined by us;

         (iv) the conformity to original documents, of all documents produced
      to us as copies and the authenticity of all original documents which, or
      copies of which, have been submitted to us; and

         (v) that the information disclosed by our Searches has not been
      materially altered and the Searches did not fail to disclose any
      material information which had been delivered for filing or
      registration, but was not disclosed or did not appear on the public file
      at the time of the Searches.

               Unless otherwise defined herein, terms defined in the Joint
Proxy Statement/Prospectus have the same meanings when used in this opinion.

               Based upon the foregoing, subject to the reservations set out
below, and to any matters not disclosed to us, we are of the opinion that:

               (1) ADT has been duly incorporated as a limited liability
company and is validly existing and in good standing under the laws of Bermuda
and has all requisite corporate power and authority to issue the Combined
Company Common Shares.

               (2) All necessary action has been taken by or on behalf of ADT
and all the necessary authorizations and approvals of Governmental authorities
in Bermuda have been duly obtained for the issue of the Combined Company
Common Shares.

               (3) When issued to Tyco shareholders in the Merger, the
Combined Company Common Shares will be duly issued and will be outstanding as
fully paid and non-assessable shares of the Combined Company.

               (4) The issuance of the Combined Company Common Shares to Tyco
shareholders in the Merger will not breach or conflict with and will not
constitute a default or violation of any of the terms or provisions of the
Combined Company's Memorandum of Association, Certificate of Incorporation or
Bye-laws[, including as amended pursuant to the Merger].

               (5) Under Bermuda law, the liability of the holders of Combined
Company Common Shares in respect of obligations of the Combined Company is
limited to the amount unpaid in respect of their Combined Company Common
Shares, to the extent that there is no contract or agreement providing
otherwise made between the holders of the Combined Company Common Shares and
the Combined Company.

               (6) There are no taxes, duties or other charges payable to or
chargeable by the Government of Bermuda, or any authority or agency thereof,
in respect of the issue of the Combined Company Common Shares.

               Our reservations are:

               A.  Any reference in this opinion to shares being
"non-assessable" shall mean, in relation to fully paid shares of the Combined
Company and subject to any contrary provision in any agreement in writing
between such company and the holder of such shares, that no shareholder shall
be bound by an alteration to the Memorandum of Association or Bye-laws of the
Combined Company after the date on which he became a shareholder, if and so
far as the alteration requires him to take, or subscribe for additional
shares, or in any way increases his liability to contribute to the share
capital of, or otherwise to pay money to, the Combined Company.

               B.  We express no opinion as to any law other than Bermuda law
and none of the opinions expressed herein relates to compliance with or
matters governed by the laws of any jurisdiction except Bermuda.

               This opinion is addressed to you in connection with the
registration of the Combined Company Common Shares with the Securities and
Exchange Commission and is not to be made available to, or relied on by any
other person or entity, or for any other purpose, without our prior written
consent.

               We hereby consent to the inclusion of this opinion as an
exhibit to the Joint Proxy Statement/Prospectus.  We also consent to the
reference to our Firm under the caption "Legal Matters" in the Joint Proxy
Statement/Prospectus.

               This opinion is to be governed by and construed in accordance
with the laws of Bermuda and shall not give rise to legal proceedings in any
jurisdiction other than Bermuda.

                                    Yours faithfully,

    

   
                                                                   Exhibit 8.1







                      [LETTERHEAD OF KRAMER, LEVIN, NAFTALIS & FRANKEL]

                                              __________, 1997

Tyco International Ltd.
One Tyco Park
Exeter, New Hampshire 03223-1108

   Re: Registration Statement on Form S-4
      Registration No. 333-24363

Gentlemen:

   We have acted as counsel to Tyco International Ltd., a Massachusetts
corporation ("Tyco"), in connection with the planned merger (the "Merger") of
Limited Apache, Inc. ("Merger Sub"), a Massachusetts corporation and a
wholly-owned subsidiary of ADT Limited, a Bermuda corporation ("ADT"), with
and into Tyco on the terms set forth in the Agreement and Plan of Merger dated
as of March 17, 1997 among Tyco, Merger Sub, and ADT (the "Merger Agreement").

   For purposes of the opinion set forth below, we have reviewed and relied
upon (i) the Merger Agreement, (ii) the final Joint Proxy Statement/Prospectus
included in Registration Statement No. 333-24363, as amended, filed by ADT and
Tyco with the Securities and Exchange Commission (the "Joint Proxy
Statement/Prospectus"), and (iii) such other documents, records, and
instruments as we have deemed necessary or appropriate as a basis for our
opinion.

   In addition, we have assumed that (i) the Merger will be consummated in
accordance with the Merger Agreement and as described in the Joint Proxy
Statement/Prospectus (including satisfaction of all covenants and conditions
to the obligations of the parties without amendment or waiver thereof); (ii)
the Merger will qualify as a merger under the applicable laws of
Massachusetts; and (iii) the Merger Agreement and all other documents and
instruments referred to therein or in the Joint Proxy Statement/Prospectus are
valid and binding in accordance with their terms.

   Any inaccuracy in, or breach of, any of the aforementioned agreements,
documents, or assumptions or any change after the date hereof in applicable
law could adversely affect our opinion. No ruling has been (or will be) sought
from the Internal Revenue Service by Tyco, ADT, or Merger Sub as to the
federal income tax consequences of any aspect of the Merger.

   Based upon and subject to the foregoing as well as the limitations set
forth below, it is our opinion, under presently applicable federal income tax
law, that:

   (1) Upon the exchange of Combined Company Common Shares for Tyco Common
      Shares pursuant to the Merger, each Tyco shareholder that is a United
      States Holder will recognize gain in an amount equal to the excess, if
      any, of (x) the fair market value of the Combined Company Common Shares
      received over (y) the Tyco shareholder's adjusted tax basis in the Tyco
      Common Shares which are exchanged therefor.

   (2) Such gain will be capital gain if the Tyco shareholder holds the Tyco
      Common Shares as a capital asset, and will be long-term gain if the Tyco
      shareholder's holding period for the Tyco Common Shares is more than one
      year.

   (3) A Tyco shareholder that realizes a loss upon the exchange will not
      recognize such loss for federal income tax purposes.

   (4) A Tyco shareholder that recognizes gain for U.S. federal income tax
      purposes upon the exchange will have a tax basis in the Combined Company
      Common Shares received equal to their fair market value, and such
      shareholder's holding period for the Combined Company Common Shares will
      begin on the day following the date of the exchange.

   (5) A Tyco shareholder that realizes but is unable to recognize a loss for
      U.S. federal income tax purposes will have a tax basis in the Combined
      Company Common Shares received equal to the shareholder's basis in the
      Tyco Common Shares exchanged therefor, and the shareholder's holding
      period for the Combined Company Common Shares will include the holding
      period of the Tyco Common Shares which are exchanged therefor.

   The tax consequences described above may not be applicable to Tyco
shareholders subject to special treatment under certain federal income tax
laws, such as dealers in securities, financial institutions, insurance
companies, tax-exempt organizations, non-United States persons, and
shareholders who acquired Tyco Common Shares pursuant to the exercise of Tyco
options or similar derivative securities or otherwise as compensation.

   No opinion is expressed as to any matter not specifically addressed above.
Also, no opinion is expressed as to the tax consequences of any of the
transactions under any foreign, state, or local tax law. Furthermore, our
opinion is based on current federal income tax law and administrative
practice, and we do not undertake to advise you as to any changes after the
Effective Time (as defined in the Merger Agreement) in federal income tax law
or administrative practice that may affect our opinion unless we are
specifically asked to do so.

   We hereby consent to the filing of this opinion as an exhibit to the
aforementioned Registration Statement and to the reference to this firm under
the caption "Legal Opinions" in the Registration Statement and the Joint Proxy
Statement/Prospectus which is a part thereof. The giving of this consent,
however, does not constitute an admission that we are "experts" within the
meaning of Section 11 of the Securities Act of 1933, as amended, or within the
category of persons whose consent is required by Section 7 of said Act.

                                              Very truly yours,

    

   
                                                                   Exhibit 8.2


                     [LETTERHEAD OF DAVIS POLK & WARDWELL]


                                        _______________, 1997

ADT Limited
Cedar House
41 Cedar Avenue
Hamilton HM12, Bermuda

      Re: Registration Statement on Form S-4
         Registration No. 333-24363

Ladies and Gentlemen:

   We have acted as special counsel for ADT Limited, a Bermuda corporation
("ADT") in connection with the proposed merger of Limited Apaches Inc., a
Massachusetts corporation and a wholly owned subsidiary of ADT ("Merger
Subsidiary") with and into Tyco International Ltd ("Tyco"), pursuant to the
Agreement and Plan of Merger dated as of March 17, 1997 among Tyco, ADT and
Merger Subsidiary (the "Merger Agreement").  In connection therewith, we have
prepared the discussion set forth in the two paragraphs under the caption
"Certain U.S. Federal Income, United Kingdom and Bermuda Tax Consequences --
United States" that are entitled "Reverse Stock Split" and "Holding Combined
Company Common Shares," respectively, (the "Discussion") in the Joint Proxy
Statement/Prospectus (the "Joint Proxy Statement/Prospectus") that is part of
the Registration Statement on Form S-4 (Registration No. 333-24363) filed by
ADT and Tyco with the Securities and Exchange Commission.

   In rendering our opinion, we have reviewed and relied upon originals or
copies, certified or otherwise identified to our satisfaction, of such
documents, corporate records and other instruments as we have deemed necessary
or appropriate in connection with this opinion.  We hereby confirm our opinion
as set forth in the Discussion, which is a description of the material United
States federal income tax consequences for shareholders of ADT of the reverse
stock split of ADT common shares contemplated by the Merger Agreement and of
the material United States federal income tax consequences of holding combined
company common shares.

   We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the use of our name under the caption "Legal
Matters" in the Joint Proxy Statement/Prospectus.  The issuance of such
consent does not concede that we are an "expert" for the purposes of the
Securities Act of 1933.

                                              Very truly yours,
    

   
                                                                   Exhibit 8.3


                         [LETTERHEAD OF ALLEN & OVERY]


                                        _______________, 1997

ADT Limited
Cedar House
41 Cedar Avenue
Hamilton HM12
Bermuda

Registration Statement on Form S-4
Registration No. 333-24363

Dear Sirs,

   We have acted as special legal advisors in England for ADT Limited, a
Bermuda company ("ADT") in connection with the proposed merger of Tyco
International Ltd ("Tyco") into Limited Apache, Inc., a Massachusetts
corporation and a wholly owned subsidiary of ADT, pursuant to the Agreement
and Plan of Merger dated as of March 17, 1997 among Tyco, ADT and Merger
Subsidiary (the "Merger Agreement").  In connection therewith, we have
prepared the discussion as to the position of shareholders of ADT set forth
under the caption "Certain United States Federal Income, United Kingdom and
Bermuda Tax Consequences--United Kingdom" (the "Discussion") in the Joint
Proxy Statement/Prospectus (the "Joint Proxy Statement/Prospectus") that is
part of the Registration Statement on Form S-4 (Registration No. 333-24363)
filed by ADT and Tyco with the Securities and Exchange Commission.

   In rendering our opinion, we have examined and are familiar with originals
or copies, certified or otherwise identified to our satisfaction, of such
documents, corporate records and other instruments as we have deemed necessary
or appropriate in connection with this opinion.  We hereby confirm our opinion
as set forth in the Discussion, which is a description of the material United
Kingdom tax consequences for shareholders of ADT of the reverse stock split of
ADT common  shares contemplated by the Merger Agreement and of the material
United Kingdom tax consequences of holding combined company common shares.
Our opinion is contained to such matters.  We express no opinion as to the
laws of Bermuda, the United States of America or any other territory or
jurisdiction.

   We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the use of our name under the caption
"Legal Matters" in the Joint Proxy Statement/Prospectus. The issuance of
such consent does not concede that we are an "expert" for the purposes of
the Securities Act of 1933.

                                        Yours faithfully,
    

   
                                                                   Exhibit 8.4


                   [LETTERHEAD OF APPLEBY, SPURLING & KEMPE]


                                        _______________, 1997

ADT Limited
Cedar House
41 Cedar Avenue
Hamilton HM12, Bermuda

      Re: Registration Statement on Form S-4
         Registration No. 333-24363

Ladies and Gentlemen:

   We have acted as attorneys in Bermuda for ADT Limited, a Bermuda limited
liability company ("ADT") in connection with the proposed merger of Tyco
International Ltd ("Tyco") into Limited Apache, Inc., a Massachusetts
corporation and a wholly owned subsidiary of ADT ("Merger Subsidiary"),
pursuant to the Agreement and Plan of Merger dated as of March 17, 1997 among
Tyco, ADT and Merger Subsidiary (the "Merger Agreement").  In connection
therewith, we have prepared the discussion on the Bermuda tax consequences of
the proposed merger as to shareholders of ADT set forth under the caption
"Certain United States Federal Income, United Kingdom and Bermuda Tax
Consequences--Bermuda" (the "Discussion") in the Joint Proxy
Statement/Prospectus (the "Joint Proxy Statement/Prospectus") that is part of
the Registration Statement on Form S-4 (Registration No. 333-24363) filed by
ADT and Tyco with the Securities and Exchange Commission.

   In rendering our opinion, we have examined and are familiar with originals
or copies, certified or otherwise identified to our satisfaction, of such
documents, corporate records and other instruments as we have deemed necessary
or appropriate in connection with this opinion.  We hereby confirm our opinion
as set forth in the Discussion, which is a description of the material Bermuda
tax consequences for shareholders of ADT of the reverse stock split of ADT
common shares contemplated by the Merger Agreement and of the material Bermuda
tax consequences of holding combined company common shares.

   We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement.

                                        Very truly yours,
    

   
                                                                 Exhibit 10.1



                               ADT LIMITED 1993

                           LONG TERM INCENTIVE PLAN

                        (AS AMENDED ____________, 1997)

                         (TO BE KNOWN HEREAFTER AS THE

                            TYCO INTERNATIONAL LTD.

                         LONG TERM INCENTIVE PLAN)*

*In the event the merger described in the agreement dated March 17, 1997
among Tyco International Ltd., ADT Limited and Limited Apache, Inc., is not
consummated, the name of the plan will continue to be the ADT Limited 1993
Long Term Incentive Plan, and references in the Plan to Tyco International
Ltd. shall be disregarded or treated as references to ADT Limited, as
appropriate.

Section 1.  Purpose.

The purposes of this Tyco International Ltd. Long Term Incentive Plan (the
"Plan") are to promote the interest of Tyco International Ltd. (together with
any successor thereto, the "Company") and its stockholders by (i) attracting
and retaining officers, key employees or directors of the Company and its
Subsidiaries (ii) motivating such employees or directors by means of
performance-related incentives to achieve longer-range performance goals, and
(iii) enabling such employees or directors to participate in the long-term
growth and financial success of the Company.

Section 2.  Definitions.

As used in the Plan, the following terms shall have the meanings set forth
below:

"ADT Merger" means the merger described in the agreement dated March 17, 1997
among Tyco International Ltd., ADT Limited and Limited Apache, Inc.

"Award" shall mean any Option, Stock Appreciation Right, Performance Award,
Dividend Equivalent, or other Stock Based Award, including any Prior ADT
Option or Prior Tyco Option.

"Award Agreement" shall mean any written agreement, contract or other
instrument or document evidencing any Award, which may, but need not, be
executed or acknowledged by a Participant.

"Board" shall mean the Board of Directors of the Company.

"Code" shall mean the U.S. Internal Revenue Code of 1986, as amended from time
to time.

"Committee" shall mean the Board or a committee of the Board designated by the
Board to administer the Plan and composed of not less than the minimum number
of persons from time to time required by Rule 16b-3 or any applicable law,
each of whom, to the extent necessary to comply with Rule 16b-3 only, is a
"non-employee director" within the meaning of Rule 16b-3.

"Director" shall mean any member of the Board.

"Dividend Equivalent" shall mean any right granted under Section 6(a) of the
Plan.

"Employee" shall mean any officer or key employee of the Company or of any
Subsidiary, as determined by the Committee.

"Exchange Act" shall mean the U.S. Securities Exchange Act of 1934, as amended.

"Fair Market Value" shall mean, (A) with respect to any property other than
the Shares, the fair market value of such property determined by such methods
or procedures as shall be established from time to time by the Committee and
(B) with respect to the Shares, as of any date, (i) the last reported sales
price regular way on the New York Stock Exchange or, if not reported for the
New York Stock Exchange, on the Composite Tape, or, in case no such reported
sale takes place on such day, the average of the reported closing bid and asked
quotations on the New York Stock Exchange, (ii) if the Shares are not listed
on the New York Stock Exchange or no such quotations are available, the
closing price of the Shares as reported by the National Market System, or
similar organization, or if no such quotations are available, the average of
the high bid and low asked quotations in the over-the-counter market as
reported by the National Quotation Bureau Incorporated or similar
organization; or (iii) in the event that there shall be no public market for
the Shares, the fair market value of the Shares as determined (which
determination shall be conclusive) in good faith by the Committee, based upon
the value of the Company as a going concern, as if such Shares were publicly
owned stock, but without any discount with respect to minority ownership.

"Incentive Stock Option" shall mean an option granted under Section 6(a) of
the Plan that is intended to meet the requirements of Section 422 of the Code
or any successor provision thereto.

"Option" shall mean an option granted under Section 6(a) of the Plan.

"Other Stock-Based Award" shall mean any right granted under Section 6(e)
of the Plan.

"Participant" shall mean any Employee or Director granted an Award under the
Plan.

"Performance Award" shall mean any right granted under Section 6(d) of the
Plan.

"Person" shall mean any individual, corporation, partnership, association,
joint-stock company, trust, unincorporated organization, government or
political subdivision thereof or other entity.

"Prior ADT Option" shall mean any option granted under the ADT Senior
Executive Share Option Plan, the ADT US Stock Option Plan 1990, the ADT
International Executive Share Option Plan, or this Plan by ADT Limited or its
affiliate with respect to Prior ADT Shares.

"Prior ADT Shares" shall mean the common shares of ADT Limited prior to the
ADT Merger.

"Prior Tyco Option" shall mean any option granted with respect to Prior
Tyco Shares by Tyco International Ltd. to its employee, or assumed by
Tyco International Ltd., prior to the ADT Merger.

"Prior Tyco Shares" shall mean the common shares of Tyco International Ltd.
prior to the ADT Merger.

"Rule 16b-3" shall mean Rule 16b-3 promulgated by the SEC under the Exchange
Act or any successor rule or regulation thereto as in effect from time to time.

"SEC" shall mean the U.S. Securities and Exchange Commission, or any successor
thereto.

"Shares" shall mean the common shares of the Company, U.S. $0.20 par value,
and such other securities or property as may become subject to Awards pursuant
to an adjustment made under Section 4(b) of the Plan.*

"Stock Appreciation Right" shall mean any right granted under Section 6(b) of
the Plan.

"Subsidiary" shall mean a subsidiary company as defined by Section 86 of the
Companies Act 1981 of Bermuda (as amended).

*If the ADT Merger is not consummated, then "Shares" will mean common
shares of ADT, U.S.$0.10 par value.


Section 3.  Administration.

The Plan shall be administered by the Committee.  Subject to the terms of the
Plan and applicable law, and in addition to other express powers and
authorizations conferred on the Committee by the plan, the Committee shall
have full power and authority to (i) designate Participants; (ii) determine
the type or types of Awards to be granted to an eligible Employee or Director;
(iii) determine the number of Shares to be covered by, or with respect to
which payments, rights, or other matters are to be calculated in connection
with, Awards; (iv) determine the terms and conditions of any Award; (v)
determine whether, to what extent, and under what circumstances Awards may be
settled or exercised in cash, Shares, other securities, other Awards or other
property, or canceled, forfeited, or suspended and the method or methods by
which Awards may be settled, exercised, canceled, forfeited, or suspended,
(vi) determine whether, to what extent, and under what circumstances cash,
Shares, other securities, other Awards, other property and other amounts
payable with respect to an Award shall be deferred either automatically or at
the election of the holder thereof or of the Committee; (vii) interpret and
administer the Plan and any instrument or agreement relating to, or Award made
under, the Plan; (viii) establish, amend, suspend, or waive such rules and
regulations and appoint such agents as it shall deem appropriate for the
proper administration of the Plan.  Unless otherwise expressly provided in the
Plan, all designations, determinations, interpretations, and other decisions
under or with respect to the Plan or any Award shall be within the sole
discretion of the Committee, may be made at any time and shall be final,
conclusive, and binding upon all Persons, including the Company, any
Subsidiary, any Participant, any holder or beneficiary of any Award, any
shareholder and any Employee.

Section 4.  Shares Available for Awards.

(a)   Shares Available

      Subject to adjustment as provided in Section 4(b);

     (i)  Calculation of Number Shares Available.

         The number of Shares with respect to which Awards may be granted
         under the Plan shall be 22,000,000.(**)  If, after the effective date
         of the Plan, any Award is forfeited, or any Award otherwise
         terminates or is canceled without the delivery of Shares or of other
         consideration, then the Shares covered by such Award or to which such
         Award relates, or the number of Shares otherwise counted against the
         aggregate number of Shares with respect to which Awards may be
         granted, to the extent of any such forfeiture, termination or
         cancellation, shall again be, or shall become, Shares with respect to
         which Awards may be granted.

         (**)22,000,000 reflects the reverse stock split contemplated by the
         ADT Merger.  If the ADT Merger is not consummated, the number of
         ADT common shares with respect to which Awards may be granted
         under the Plan shall remain 17,000,000 (not adjusted for the
         reverse stock split).

    (ii)  Accounting for Awards

         For purposes of this Section 4:

        (A)  if an Award (other than a Dividend Equivalent) is related to or
             payable in Shares, the number of Shares covered by such Award, or
             to which such Award related, shall be counted on the date of
             grant of such Award against the aggregate number of Shares with
             respect to which Awards may be granted under the Plan; and

        (B)  Dividend Equivalents and Awards not related to or payable in
             Shares shall be counted against the aggregate number of Shares
             with respect to which Awards may be granted under the Plan in
             such amount and at such time as the Committee shall determine
             under procedures adopted by the Committee consistent with the
             purposes of the Plan.

   provided, that Awards that operate in tandem with (whether granted,
   simultaneously with or at a different time from), or that are substituted
   for, other Awards may be counted or not counted under procedures adopted by
   the Committee in order to avoid double counting.  Subject to the
   requirements of applicable law, any Shares delivered by the Company, or any
   Shares with respect to which Awards are made by the Company, or any Shares
   with respect to which the Company becomes obligated to make Awards, through
   the assumption of, or in substitution for, outstanding awards previously
   granted by an acquired company, shall not be counted against the Shares
   available for Awards under the Plan.

   (iii)  Sources of Shares Deliverable Under Awards

         Any Shares delivered pursuant to an Award may consist, in whole or in
         part, of authorized and unissued Shares or, to the extent permissible
         under applicable law, of Shares acquired by any Subsidiary or any
         Other Person designated by the Company.

(b)   Adjustments

      In the event that the Committee determines that any dividend or other
      distribution (whether in the form of cash, Shares, other securities, or
      other property), recapitalization, stock split, reverse stock split,
      reorganization, merger, consolidation, split-up, spin-off, combination,
      repurchase, or exchange of Shares or other rights to purchase Shares or
      other securities of the Company, or other similar corporate transaction
      or event affects the Shares such that any adjustment is determined by the
      Committee to be appropriate in order to prevent dilution or enlargement
      of the benefits or potential benefits intended to be made available
      under the Plan, then the Committee shall, in such manner as it may deem
      equitable, adjust any or all of (i) the number and type of Shares (or
      other securities or property) with respect to which Awards may be
      granted, (ii) the number and type of Shares (or other securities or
      property subject to outstanding Awards), and (iii) the grant or exercise
      price with respect to any Award or, if deemed appropriate, make
      provision for a cash payment to the holder of an outstanding Award;
      provided, in each case that with respect to Awards of Incentive Stock
      Options no such adjustment shall be authorized to the extent that such
      authority would cause the Plan to violate Section 422(b)(1) of the Code
      or any successor provision thereto; and provided further, that the
      number of Shares subject to any Award denominated in Shares shall always
      be a whole number.

(c)   Limitation

      No Participant shall be granted Awards for more than 3,000,000 Shares in
      1997 or any subsequent calendar year.  For purposes of this limitation,
      neither the modification of a Prior ADT Option pursuant to Section 7(a)
      nor the replacement of a Prior Tyco Option pursuant to Section 7(b)
      shall be treated as the grant of an Award.

Section 5.  Eligibility.

Any Employee or Director shall be eligible to be designated a Participant.

Section 6.  Awards.

(a)   Options

      The Committee is hereby authorized to grant to eligible Employees and
      Directors an option to purchase Shares (an "Option") which shall (except
      as otherwise provided in Section 7) contain the following terms and
      conditions and such additional terms and conditions, which are not
      inconsistent with the provisions of the Plan, as the Committee shall
      determine.

     (i)  Exercise Price

         The purchase price per Share under an Option shall be not less than
         the Fair Market Value of a Share at the date of the grant, except
         that if the Award requires the option to be paid for by the
         Participant, or if any discount from such Fair Market Value is
         expressly granted in lieu of a reasonable amount of salary or cash
         bonus, the Committee may fix such purchase price at not less than 85%
         of such Fair Market Value.

    (ii)  Time and Method of Exercise

         The Committee shall determine the time or times at which an Option
         may be exercised in whole or in part, and the method or methods by
         which, and the form or forms (which may include, without limitation,
         cash, Shares, outstanding Awards, other securities or other property,
         or any combination thereof, having a Fair Market Value on the
         exercise date equal to the relevant exercise price) in which, payment
         of the exercise price with respect thereto may be deemed to have been
         made.

   (iii)  Incentive Stock Options

         The terms of any Incentive Stock Option granted under the Plan shall
         comply in all respects with the provisions of Section 422 of the
         Code, or any successor provisions, and any regulations promulgated
         thereunder.  The aggregate fair market value (determined on the date
         an option is granted) of shares with respect to which Incentive Stock
         Options become exercisable by any Employee in any year shall not
         exceed $100,000.

(b)   Stock Appreciation Rights

      The Committee is hereby authorized to grant to eligible Employees and
      Directors a "Stock Appreciation Right", which shall consist of a right
      to receive the excess of (i) the Fair Market Value of one Share on the
      date the right is exercised or, if the Committee shall so determine in
      the case of any such right other than one related to any Incentive Stock
      Option, at any time during a specified period before or after the date
      of exercise over (ii) the grant price (determined in the manner set forth
      below) of the right.  A Stock Appreciation Right may be granted in
      tandem with an Option, in addition to an Option, or free standing and
      unrelated to an Option.

     (i)  Grant Price

         The grant price of a Stock Appreciation Right shall be not less than
         the Fair Market Value of a Share at the date of the grant, except
         that if the Award requires the SAR to be paid for by the Participant,
         or if any discount from such Fair Market Value is expressly granted
         in lieu of a reasonable amount of salary or cash bonus, the Committee
         may fix such grant price at not less than 85% of such Fair Market
         Value.

    (ii)  Other Terms and Conditions

         Subject to the terms of the Plan and any applicable Award Agreement,
         the Committee shall determine, at or after the grant of a Stock
         Appreciation Right, the term, methods of exercise, methods of
         settlement, and any other terms and conditions of any Stock
         Appreciation Right.  Any such determination by the Committee may be
         changed by the Committee from time to time and may govern the
         exercise of Stock Appreciation Rights granted or exercised prior to
         such determination as well as Stock Appreciation Rights granted or
         exercised thereafter.  The Committee may impose such conditions or
         restrictions on the exercise of any Stock Appreciation Right as it
         shall deem appropriate.

(c)   Performance Awards

      The Committee is hereby authorized to grant to eligible Employees and
      Directors a "Performance Award"), which shall consist of a right, (i)
      denominated or payable in cash, Shares, other securities or other
      property (including without limitation, restricted securities), and (ii)
      which shall confer on the holder thereof rights valued as determined by
      the Committee and payable to, or exercisable by, such holder, in whole
      or in part, upon the achievement of such performance goals during such
      performance periods as the Committee shall establish.  The criteria with
      respect to which performance goals may be established are stock price,
      market share, sales, earnings, earnings per share, earnings before
      income tax, cash flow and return on equity.

     (i)  Terms and Conditions

         Subject to the terms of the Plan and any applicable Award Agreement,
         the Committee shall determine the performance goals to be achieved
         during any performance period, the length of any performance period,
         the amount of any Performance Award and the amount of any payment or
         transfer to be made pursuant to any Performance Award.

    (ii)  Payment of Performance Awards

         Performance Awards may be paid in a lump sum or in installments
         following the close of the performance period or, in accordance with
         procedures established by the Committee, on a deferred basis.

(d)   Dividend Equivalents

      The Committee is hereby authorized to grant to eligible Employees and
      Directors a "Dividend Equivalent", which shall consist of a right
      pursuant to which any such eligible Employee or Director shall be
      entitled to receive payments equivalent to dividends with respect to a
      number of Shares determined by the Committee, and the Committee may
      provide that such amounts (if any) shall be deemed to have been
      reinvested in additional Shares or otherwise reinvested.  Subject to the
      terms of the Plan and any applicable Award Agreement, such Awards may
      have such terms and conditions as the Committee shall determine.

(e)   Other Stock-Based Awards

      The Committee is hereby authorized to grant to eligible Employees and
      Directors an "Other Stock-Based Award", which shall consist of a right
      (i) which is other than an Award or right described in Section 6(a),
      (b), (c), or (d) above and (ii) which is denominated or payable in,
      valued in whole or in part by reference to, or otherwise based on or
      related to Shares (including, without limitation, securities convertible
      into Shares), as are deemed by the Committee to be consistent with
      the purposes of the Plan.  Subject to the terms of the Plan and any
      applicable Award Agreement, the Committee shall determine the terms
      and conditions of any such Other Stock-Based Award, which conditions may
      include satisfaction of performance goals relating to stock price,
      market share, sales, earnings, earnings per share, earnings before
      income tax, cash flow and return on equity.

(f)   General

     (i)  Awards May be Granted Separately or Together

         Awards may, in the discretion of the Committee, be granted either
         alone or in addition to, in tandem with, or in substitution for any
         other Award granted under the Plan or any award granted under any
         other plan of the Company or any Subsidiary.  Awards granted in
         addition to or in tandem with other Awards or awards granted under
         any other plan of the Company or any Subsidiary may be granted either
         at the same time as or at a different time from the grant of such
         other Awards or awards.

    (ii)  Forms of Payment by Company Under Awards

         Subject to the terms of the Plan and of any applicable Award
         Agreement and the requirements of applicable law, payments or
         transfers to be made by the Company or a Subsidiary upon the grant,
         exercise or payment of an Award may be made in such form or forms as
         the Committee shall determine, including, without limitation, cash,
         Shares, other securities, other Awards or other property, or any
         combination thereof, and may be made in a single payment or transfer,
         in installments, or on a deferred basis, in each case in accordance
         with rules and procedures established by the Committee.  Such rules
         and procedures may include, without limitation, provisions for the
         payment or crediting of reasonable interest on installment or deferred
         payments or the grant or crediting of Dividend Equivalents in respect
         of installment or deferred payments denominated in Shares.

   (iii)  Limits on Transfer of Awards

         Subject to paragraph (ix) below:

        (A)  Each Award, and each right under any Award, shall be exercisable
             only by the Participant during the Participant's lifetime, or, if
             permissible under applicable law, by the Participant's guardian
             or legal representative or by a transferee receiving such Award
             pursuant to a qualified domestic relations order (a "QDRO") as
             defined in the Code or Title I of the U.S. Employee Retirement
             Income Security Act of 1974 ("ERISA"), or the rules thereunder.

        (B)  No Award (prior to the time, if applicable, Shares are issued
             in respect of such Award), and no right under any such Award,
             may be assigned, alienated, pledged, attached, sold or
             otherwise transferred or encumbered by a Participant otherwise
             than by will or by the laws of descent and distribution (or,
             in the case of restricted securities, to the Company) or
             pursuant to a QDRO, and any such purported assignment,
             alienation, pledge, attachment, sale, transfer or encumbrance
             shall be void and unenforceable against the Company or any
             Subsidiary; provided, that the designation of a beneficiary
             shall not constitute an assignment, alienation, pledge,
             attachment, sale, transfer or encumbrance.

    (iv)  Terms of Awards

         The term of each Award shall be for such period as may be determined
         by the Committee; provided, that in no event shall the term of any
         Incentive Stock Option exceed a period of ten years from the date of
         its grant.

     (v)  Rule 16b-3 Six-Month Limitations

         To the extent required in order to comply with Rule 16b-3 only, any
         equity security offered pursuant to the Plan must be held for at
         least six months after the date of grant, and with respect to any
         derivative security issued pursuant to the Plan at least six months
         must elapse from the date of acquisition of such derivative security
         to the date of disposition (other than upon exercise or conversion)
         of the derivative security or its underlying equity security after
         the grant thereof.  Terms used in the preceding sentence shall, for
         the purposes of such sentence only, have the meanings, if any,
         assigned to them under Rule 16b-3.

    (vi)  Share Certificates

         All certificates for Shares or other securities of the Company or any
         Subsidiary delivered under the Plan pursuant to any Award or the
         exercise thereof shall be subject to such stop transfer orders and
         other restrictions as the Committee may deem advisable under the Plan
         or the rules, regulations, and other requirements of the U.S.
         Securities and Exchange Commission, any stock exchange upon which
         such Shares or other securities are then listed, and any applicable
         laws, and the Committee may cause a legend or legends to be put on
         any such certificates to make appropriate reference to such
         restrictions.  Notwithstanding the foregoing, no action shall be
         taken by the Committee which would, under the laws of Bermuda, cause
         a separate class of securities other than Shares to be created and
         the Committee shall consult with appropriate legal counsel in this
         regard.

   (vii)  Consideration for Grants

         Awards, may be granted for no cash consideration, for such nominal
         cash consideration as may be required by applicable law or for such
         greater amount as may be established by the Committee.

  (viii)  Delivery of Shares or Other Securities and Payment by Participant
          of Consideration

         No Shares or other securities shall be delivered pursuant to any
         Award until payment in full of any amount required to be paid
         pursuant to the Plan or the applicable Award Agreement is received by
         the Company.  Such payment may be made by such method or methods and
         in such form or forms as the Committee shall determine, including,
         without limitation, cash, Shares, other securities, other Awards or
         other property, or any combination thereof, provided that the
         combined value, as determined by the Committee, of all cash and cash
         equivalent and the Fair Market Value of any such Shares or other
         property so tendered to the Company, as of the date of such tender,
         is at least equal to the full amount required to be paid pursuant to
         the Plan or the applicable Award Agreement to the Company.

    (ix)  Committee Discretion to Remove or Amend Restrictions on
Transferability

         Notwithstanding the provisions of paragraph (iii) above and any other
         restrictions on transferability of Awards referred to in this Plan,
         the Committee may, in its discretion, either generally or
         specifically, prospectively or retroactively, (a) grant Awards
         without limits on transferability thereof or with such limits on
         transferability as the Committee may deem appropriate in the
         circumstances, and (b) waive, amend, alter, suspend, discontinue,
         cancel or terminate any limits on transferability of Awards on such
         terms as the Committee may deem appropriate; provided, that any of
         the acts described in clause (b) of this paragraph that would impair
         the rights of any Participant, or any holder or any beneficiary of
         any Award theretofore granted, shall not to that extent be effective
         without the consent of the affected Participant, holder or
         beneficiary.

Section 7.  Modification and Replacement of Outstanding Options.  (*)

(*)In the event the ADT Merger is not consummated, only clause (c) of Section
7 shall be applicable.

   (a) Modification of Prior ADT Options

      Each Prior ADT Option outstanding as of the effective date of the ADT
      Merger shall be modified, as of that date, as follows:

      (i) Shares to Which Option Relates.

         Each Prior ADT Option shall entitle the recipient to purchase a
         number of Shares equal to the product of .48133 and the number of
         Prior ADT Shares to which such Prior ADT Option originally related.

      (ii) Exercise Price.

         The exercise price of each Prior ADT Option shall be equal to the
         original exercise price of such Prior ADT Option, divided by .48133.

      Each Prior ADT Option shall continue to have the same term, and shall
      otherwise continue to be subject to all of the other terms and
      conditions, as applied to such option prior to the ADT Merger.  In the
      event of a conflict between the terms of this Plan and the terms of the
      award agreement by which a Prior ADT Option was originally granted, the
      terms of the award agreement shall govern.

   (b) Replacement of Prior Tyco Options

      In addition to any other Awards that may be granted under the Plan,
      Options ("Substitute Options") shall be granted hereunder in replacement
      of all outstanding Prior Tyco Options, as of the effective date of the
      ADT Merger.  The number of Shares subject to each Substitute Option
      issued in respect of a Prior Tyco Option shall be the same as the number
      of Prior Tyco Shares to which such Prior Tyco Option related, and the
      exercise price of such Substitute Option shall be the same as the
      exercise price of such Prior Tyco Option.  Each Substitute Option shall
      have the same term as the original option in respect of which it is
      granted, and shall otherwise be subject to all of the other terms and
      conditions as applied to such original option.  Except to the extent
      required to reflect the ADT Merger, in the event of a conflict
      between the terms of this Plan and the terms of the award agreement
      by which a Prior Tyco Option was originally granted, the terms of the
      award agreement shall govern.

   (c) All Prior ADT Options Subject to Plan.

      From and after the date of this Amendment each outstanding Prior ADT
      Option will be subject to the terms of this Plan and  the award
      agreement with respect to such Option.

Section 8.  Amendment and Termination.

Except to the extent prohibited by applicable law and unless otherwise
expressly provided in an Award Agreement or in the Plan:

(a)   Amendments to the Plan

      The Board may amend, alter, suspend, discontinue, or terminate the Plan
      without the consent of any shareholder, Participant, other holder or
      beneficiary of an Award, or other Person; provided that any such
      amendment, alteration, suspension, discontinuation, or termination that
      would impair the rights of any Participant, or any other holder or
      beneficiary of any Award theretofore granted, shall not to that extent
      be effective without the consent of the affected Participant, holder or
      beneficiary and provided further, that notwithstanding any other
      provision of the Plan or any Award Agreement, without the approval of
      the shareholders of the Company no such amendment, alteration,
      suspension, discontinuation, or termination shall be made that would:

     (i)  increase the total number of Shares available for Awards under the
          Plan, except as provided in Section 4 of the Plan; or

    (ii)  otherwise cause the Plan to cease to comply with any applicable law
          or regulatory requirement with respect to which the Board determines
          compliance is necessary or desirable.

(b)   Amendments to Awards

      The Committee may waive any conditions or rights under, amend any terms
      of, or alter, suspend, discontinue, cancel or terminate, any Award
      theretofore granted, prospectively or retroactively, without the consent
      of any relevant Participant or holder or beneficiary of an Award;
      provided that, subject to the Committee's right to adjust Awards
      pursuant to Section 6(f)(ix) and Section 8(c) and (d), (i) any such
      waiver, amendment, alteration, suspension, discontinuance, cancellation
      or termination that would materially impair the rights of any
      Participant, or any holder or beneficiary of any Award theretofore
      granted shall not to that extent be effective without the consent of the
      affected Participant, holder or beneficiary; and (ii) without the
      approval of the shareholders of the Company, no such waiver, amendment,
      alteration, suspension, discontinuance, cancellation or termination that
      would materially increase the rights of any Participant or any holder or
      beneficiary of any Award, shall be effective unless the Award, after
      giving effect to such waiver, amendment, alteration, suspension,
      discontinuance, cancellation or termination, could permissibly have been
      granted under the terms of the Plan (without regard to this Section
      8(b)).

(c)   Adjustments of Awards Upon Certain Acquisitions

      In the event the Company or any Subsidiary shall assume outstanding
      employee awards or the right or obligation to make future employee
      awards in connection with the acquisition of another business or another
      corporation or business entity, the Committee may make such adjustments,
      not inconsistent with the terms of the Plan, in the terms of Awards as
      it shall deem appropriate in order to achieve reasonable comparability,
      or other equitable relationship between the assumed awards and the Awards
      as so adjusted.

(d)   Adjustment of Awards Upon the occurrence of Certain Unusual or
      Nonrecurring Events

      The Committee is hereby authorized to make adjustments in the terms and
      conditions of and the criteria included in, Awards in recognition of
      unusual or nonrecurring events (including, without limitation, the
      events described in Section 4(b) hereof) affecting the Company, any
      Subsidiary, or the financial statements of the Company or any
      Subsidiary, or of changes in applicable laws, regulations, or accounting
      principles, whenever the Committee determines that such adjustments are
      appropriate in order to prevent dilution or enlargement of the benefits
      or potential benefits intended to be made available under the Plan, or
      to be derived by the Company.

Section 9.  Change in Control.

(a)   In addition to the Committee's authority set forth in Section 8(d), in
       order to maintain the Participants' rights in the event of any Change
       in Control, as hereinafter defined, the Committee, as constituted
       before such Change in Control, is hereby authorized, and has sole
       discretion, as to any Award, either at the time such Award is made
       hereunder or any time thereafter, to take any one or more of the
       following actions: (i) provide for the acceleration of any time periods
       relating to the exercise or realization of such Award so that such
       Award may be exercised or realized in full on or before a date fixed by
       the Committee; (ii) provide for the purchase of any such Award, upon the
       Participant's request, for an amount of cash equal to the amount that
       could have been attained upon the exercise of such Award or realization
       of the Participant's rights had such Award been currently exercisable
       or payable; (iii) make such adjustment to any such Award then
       outstanding as the Committee deems appropriate to reflect such Change
       in Control; or (iv) cause any such Award then outstanding to be
       assumed, or new rights substituted therefor, by the acquiring or
       surviving corporation after such Change in Control.  The Committee may,
       in its discretion, include such further provisions and limitations in
       any Award Agreement as it may deem equitable and in the best interests
       of the Company.

(b)   A "Change in Control" shall mean the occurrence of any of the following
       events:

      (i)  any "person" or "group" (as defined under Sections 13(d) and
           14(d) of the Securities Exchange Act of 1934 (the "Exchange
           Act")) is or becomes the direct or indirect "beneficial owner"
           (as defined in Rules 13d-3 and 13d-5 under the Exchange Act), of
           securities representing 50% or more of the combined voting power
           of the Company's then outstanding voting securities;

      (ii) individuals who either:

        (A)  are Directors of the Company at [DATE OF ADOPTION OF AMENDED
PLAN] or subsequently are appointed as Directors of the Company by, or on
the recommendation of, a majority of the Directors in office at [DATE OF
ADOPTION OF AMENDED PLAN]; or

        (B) are subsequently appointed as Directors of the Company by, or
on the recommendation of, a majority of those Directors of the Company
referred to in paragraph (A) above,

   cease for any reason, other than death or incapacity of a Director or
   his retirement at a general meeting of the Company at which he is
   re-elected as a Director (but including as a result of any proxy contest
   involving the solicitation of revocable proxies under Section 14(a) of the
   Exchange Act), to constitute a majority of the Board of Directors of the
   Company;

   (iii)  any "person" or "group" (other than an employee benefit plan or
plans maintained by the Company or its affiliate) comes to possess, directly
or indirectly, the legal right to direct the management and policies of the
Company, whether through the ownership of securities, by contract or otherwise
(other than solely by virtue of membership on the Board of Directors of the
Company or any committee thereof);

    (iv)  the Company effects a merger, amalgamation, scheme of arrangement or
other combination in which the Company is not the surviving entity, or a sale
or disposition of all, or substantially all, of the assets of the Company; or

     (v)  a merger, amalgamation, scheme of arrangement or other combination
of the Company or any Subsidiary of the Company with or into another person or
any analogous or similar transaction or event occurs as a result of which the
voting rights exercisable at general meetings of the Company in respect of the
shares of the Company in issue immediately prior to the relevant event no
longer represent a majority of all the voting rights normally exercisable at
general meetings of the Company in respect of the shares of the Company in
issue immediately after such event.

Section 10.  General Provisions.

(a)   No Rights to Awards

      No Employee, Director, Participant or other Person shall have any claim
      to be granted any Award, and there is no obligation for uniformity of
      treatment of Employees, Directors, Participants, or holders or
      beneficiaries of Awards.  The terms and conditions of Awards need not be
      the same with respect to each recipient.  No Participant shall have the
      rights of a shareholder with respect to any Award unless and until
      Shares have been issued in respect of such Award.

(b)   Delegation

      Subject to the terms of the Plan and applicable law, the Committee may
      delegate to one or more officers or managers of the Company or any
      Subsidiary, or to a committee of such officers or managers, the
      authority, subject to the terms and limitations as the Committee shall
      determine, to grant Awards to, or to cancel, modify or waive rights with
      respect to, or to alter, discontinue, suspend, or terminate Awards held
      by, Employees who are not officers or directors of the Company for
      purposes of Section 16 of the Exchange Act, or any successor section
      thereto, or who are otherwise not subject to such Section.

(c)   Withholding

      The Company or any Subsidiary is hereby authorized to withhold from any
      Award, from any payment due or transfer made under any Award or under
      the Plan or from any compensation or other amount owing to a Participant
      the amount (in cash, Shares, other securities, other Awards or other
      property) of any applicable withholding taxes in respect of an Award,
      its exercise, or any payment or transfer under an Award or under the
      Plan and to take such other action as may be necessary in the opinion of
      the Company to satisfy all obligations for the payment of such taxes.

(d)   No Limit on Other Compensation Arrangements

      Nothing contained in the Plan shall prevent the Company or any
      Subsidiary from adopting or continuing in effect other compensation
      arrangements (subject to shareholder approval if such approval is
      required), and such arrangements may be either generally applicable or
      applicable only in specific cases.

(e)   No Right to Employment

      The grant of an Award shall not be construed as giving a Participant the
      right to be retained in the employ of the Company or any Subsidiary.
      Further, the Company or a Subsidiary may at any time dismiss a
      Participant from employment, free from any liability or any claim under
      the Plan, unless otherwise expressly provided in the Plan or in any
      Award Agreement.

(f)   Governing Law

      The validity, construction, and effect of the Plan and any rules and
      regulations relating to the Plan shall be determined in accordance with
      the laws of Bermuda.  In addition, the Committee may amend the terms of
      the Plan and any Awards or Award Agreement in order to comply with the
      laws of Bermuda or the laws of any other applicable jurisdiction.

(g)   Severability

      If any provision of the Plan or any Award is or becomes or is deemed to
      be invalid, illegal, or unenforceable in any jurisdiction or as to any
      Person or Award, or would disqualify the Plan or any Award under any law
      deemed applicable by the Committee, such provision shall be construed or
      deemed amended to conform to applicable laws, or if it cannot be
      construed or deemed amended without, in the determination of the
      Committee, materially altering the intent of the Plan of the Award, such
      provision shall be stricken as to such jurisdiction, Person or Award and
      the remainder of the Plan and any such Award shall remain in full force
      and effect.

(h)   Additional Powers

      The Committee may refuse to issue or transfer any Shares or other
      consideration under an Award if, acting in its sole discretion, it
      determines that the issuance or transfer of such Shares or such other
      consideration might violate any applicable law or regulation or entitle
      the Company to recover the same under Section 16(b) of the Exchange Act,
      and any payment tendered to the Company by a Participant, other holder
      or beneficiary in connection with the exercise of such Award shall be
      promptly refunded to the relevant Participant, holder or beneficiary.

(i)   No Trust or Fund Created

      Neither the Plan nor any Award shall create or be construed to create a
      trust or separate fund of any kind or a fiduciary relationship between
      the Company or any Subsidiary and a Participant or any other Person.  To
      the extent that any Person acquires a right to receive payments from the
      Company or any Subsidiary pursuant to an Award, such right shall be no
      greater than the right of any unsecured general creditor of the Company
      or any Subsidiary.

(j)   No Fractional Shares

      No fractional Shares shall be issued or delivered pursuant to the Plan
      or any Award, and the Committee shall determine whether cash, other
      securities, or other property shall be paid or transferred in lieu of
      any fractional Shares or whether such fractional Shares or any rights
      thereto shall be canceled, terminated or otherwise eliminated.

(k)   Headings

      Headings are given to the Sections and subsections of the Plan solely as
      a convenience to facilitate reference.  Such headings shall not be
      deemed in any way material or relevant to the construction or
      interpretation of the Plan or any provision thereof.

Section 11.  Effective Date of the Plan.

This amended Plan shall be effective as of the date of its approval, as
amended, by the shareholders of the Company.

Section 12.  Term of the Plan.

No Award shall be granted under the Plan after June 30, 2007.  However, unless
otherwise expressly provided in the Plan or in an applicable Award Agreement,
any Award theretofore granted may, and the authority of the Board or the
Committee to amend, alter, adjust, suspend, discontinue, or terminate any such
Award or to waive any conditions or rights under any such Award, shall extend
beyond such date.
    

                                                                  Exhibit 23.1



                      CONSENT OF INDEPENDENT ACCOUNTANTS

   
               We consent to the incorporation by reference in this
Registration Statement of ADT Limited on Form S-4 (File No. 333-24363) of our
report dated March 26, 1997, on our audits of the consolidated financial
statements and the consolidated financial statement schedules of ADT Limited
as at December 31, 1996 and 1995, and for the years ended December 31, 1996,
1995 and 1994, which report is included in the Annual Report of ADT Limited on
Form 10-K.  We also consent to the reference to our firm under the caption
"Experts."
    

                                          COOPERS & LYBRAND
Hamilton, Bermuda
   
May 9, 1997
    

                                                                  Exhibit 23.2



                    CONSENT OF INDEPENDENT ACCOUNTANTS

   
               We consent to the incorporation by reference in this Amendment
No. 1 to the Registration Statement on Form S-4 of our reports dated July 25,
1996 on our audits of the consolidated financial statements and financial
statement schedule of Tyco International Ltd. as of June 30, 1996 and 1995 and
for the three years in the period ended June 30, 1996.  We also consent to the
reference to our firm under the caption "Experts."
    

                                          COOPERS & LYBRAND L.L.P.
Boston, Massachusetts
   
May 9, 1997
    


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