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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                 SCHEDULE 14D-1


                                (Amendment No. 7)


                             Tender Offer Statement
     (Pursuant to Section 14(d)(1) of the Securities Exchange Act of 1934)


                                   ADT Limited
                               (Name of Subject Company)

                                Western Resources, Inc.
                                  Westar Capital, Inc.
                                       (Bidders)

                     Common Stock, Par Value $0.10 Per Share
                         (Title of Class of Securities)

                                     000915108
                      (CUSIP Number of Class of Securities)

                                   John K. Rosenberg
                     Executive Vice President and General Counsel
                                Western Resources, Inc.
                                818 Kansas Avenue
                              Topeka, Kansas 66612
                              Phone: (913) 575-6300

                     (Name, Address and Telephone Number of Person
                      Authorized to Receive Notices and Communications
                                  on Behalf of Bidders)




                                        Copy to:

                                    Neil T. Anderson
                                   Sullivan & Cromwell
                                    125 Broad Street
                                 New York, New York 10004
                                     (212) 558-4000










This  Amendment  No.7  amends and  supplements  the Tender  Offer  Statement  on
Schedule 14D-1 (the "Schedule  14D-1"),  originally filed by Western  Resources,
Inc., a Kansas corporation ("Western Resources"),  on March 17, 1997 relating to
the exchange offer disclosed  therein to exchange all of the outstanding  Shares
for shares of Western  Resources  Common Stock upon the terms and subject to the
conditions  set forth in the  Prospectus,  dated March 14, 1997, and the related
Letter of Transmittal.  Capitalized terms used and not defined herein shall have
the meanings set forth in the Schedule 14D-1.


Item 11.          Material to be Filed as Exhibits.

         Item 11 is  hereby  amended  and  supplemented  by adding  thereto  the
following:

(a)(8)   Analysts' presentation given on April 16, 1997   
(a)(9)   Press release/employee update issued on April 16, 1997





                                    SIGNATURE

         After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.


                             WESTERN RESOURCES, INC.

Date       April 17, 1997                       By   /s/ JERRY D. COURINGTON
     -----------------------                      -------------------------
                                                    Jerry D. Courington,
                                                         Controller







                                INDEX TO EXHIBITS


                                                                    Sequentially
                                                                     Numbered
Exhibit No.                     Description                           Pages

(a)(8)                     Analysts' presentation given                 21
                             on April 16, 1997
(a)(9)                     Press release/employee update                 1
                             issued on April 16, 1997






                                                            Exhibit No. (a)(8)

The following analysts' presentation was given on April 16, 1997:

[logo] Western Resources

Kansas City Securities Association

April 16, 1997


Western Resources Vision
"Western Resources will be the leading provider of energy and
energy-related services for homes and businesses."


History
    1924 - Company founded under the name The Kansas Power and Light Company
    1980 - Profile - The Kansas Power and Light Company
      400,000 customers 
      Less than $1 billion total assets 
      Less than $300 million in market value 
      $49 million earnings
    1983 - Bought Gas Service Company
    1992 - Merged with Kansas Gas & Electric to create Western Resources 
    1993 - Sold 40% of Gas Service Company for $400+ million


Recent History
    1996 -
      Acquired The Wing Group
      Announced  agreement to exchange the balance of natural gas business worth
        $660 million to ONEOK for 45% of ONEOK stock
      Purchased  Westinghouse Security Services for approximately $358 million 
        plus assumed certain liabilities
      $3.5 billion exchange offer for ADT Limited

    1997 - Reached definitive merger agreement with KLT on 2/7/97


Western Financial Statistics 
Market price at 4/11/97 = $30.125 
52-week high/low $31.875 - $28 
Dividends:
      1997 indicated annual dividend = $2.10
      Paid every year since 1924
 Current yield = 7%
 Bond ratings of BBB+, A- and A3
 Net income twelve months ending 12/31/96 $169 million 
 EBITAD for 12 months ending 12/31/96 $591 million
 With ONEOK and KLT:
      Assets increase to more than $9 billion
      Projected market value of approximately $3.8 billion (assuming 4/11/97
      stock price and 126.5 million common shares outstanding after KLT)


Today's Western Resources
    Full-service, diversified energy company

    1996 revenues of $2 billion

    Serves 606,000 electric customers in Kansas Merger with KLT will add 430,000
      more electric customers

    Marketing access to 1.4 million natural gas customers in Kansas and Oklahoma
      through ONEOK alliance

    Nation's third-largest security provider with 430,000 monitored customers


Our Strategic Plan for Growth
    Build a branded national presence

    Maintain a strong core utility business

    Seek above average returns on energy-related investments


Strategic Priority:
Branded National Presence
Characteristics:
   No utility has more than 4% of electric market; our critical mass goal is 5%
   - 10% of energy market 
   Coming legislative changes will likely allow utilities to compete for  
   customers like AT&T, MCI, and Sprint, instead of limiting franchises

   Opportunities:
    Acquire a product with characteristics similar to electricity or natural gas
    that may be sold nationwide today. . . security
    Sell products (energy & security) under umbrella of brand names. Today we
    market under the names Westar, KPL and KGE and soon under Oklahoma Natural 
    Gas

   Investment Strategies:
   Long-term  growth  and  income  opportunities  reside  with  being a low-cost
   provider of value-added services to end-user consumers


Why  Security?

Unique opportunity to consolidate the industry

Business is attractive because of strong consumer demand and annual double-digit
growth rates

Home security is a profitable service

Estimated share size of U.S. markets:
(by thousands of customers)

     ADT       1,200                      Protection One   230
     Brinks      475                      Honeywell        200
     Westar      430                      Republic         200
     Ameritech   375                      Borg-Warner      150
     Network     250                      Rollins          120


Recent Acquisition:
Westinghouse Security Systems
   Transaction terms
      Created 3rd largest monitored security systems company in the U.S., by
      customer count 
      Added about 300,000 customers and branch offices in 24 states -- provides 
      access to 55% of US households 
      Cash transaction of approximately $358 million plus assumed certain   
      liabilities   
      Gain state-of-the-art centralized monitoring and customer service center 
      and national branch network offering an excellent platform for growth


Western Resources' Offer for ADT
    $22.50 per ADT common share
      $10.00 in cash
      $12.50 in WR common stock*
    Western Resources already owns 38.3 million ADT shares at an average cost of
    $15.40 per share 
Pending litigation
      Invalidate Republic warrants
      Disallow vote of treasury stock held by an ADT subsidiary  
      Invalidate dead  hand poison pill
    Tyco is worth (pre-tax) $16.67 per WR share

*  Represents  0.41322 of a share of Western  Resources'  common  stock for each
   share of ADT common  stock based on the closing  price of Western  Resources'
   common  stock on February  28,  1997.  ADT  shareowners  would not,  however,
   receive more than 0.42017 share of Western Resources common stock.


Strategic Priority: Strong Core Business
Characteristics:
    Low-cost producer of energy
    Strong brand identity
    Superior customer satisfaction levels
Opportunities:
    Increase product offerings to consumers
    Lower costs through reorganization
Investment Strategies :
  Expand geographic  footprint
  Focus on low-cost generation


Status report:
ONEOK Strategic Alliance

  Western  contributes all of its gas assets to ONEOK to create the 8th largest
  LDC in the country  
  Receive $34.7 million in preferred dividends plus 10% of equity earnings and 
  common dividends  
  Earnings and cash flow accretive to Western shareowners in the first full year
  $660 million transaction will make Western  Resources  the largest  shareowner
  of ONEOK with 45% ownership on a fully converted basis. ONEOK worth $10.00 per
  share of WR 
  Western gains access to an additional 735,000 customers to market unregulated 
  products and services


Status Report:
Kansas City Power & Light (KLT) merger
    Merger agreement reached at 2/7/97

    Adds 430,000 electric customers and $900 million in revenues

    Expect to close early 1998


Description of Offer:  KLT
TERM                                            SUMMARY
Consideration                        $32.00 of WR common  stock per
                                       share of KLT  common  stock*
                                     Number of WR common shares
                                       capped at 1.100 per each KLT
                                       common share
                                     Current  exchange ratio,  based on
                                       4/2/97 closing price is 1.045
                                     Includes price protection provision
Form of Transaction                  Tax-free stock swap,  pooling-of-
                                       interests transaction worth $2
                                       billion

                            *Subject  to an  exchange  ratio  of  0.917 to 1.100
                             Western  Resources common shares for each KLT share
                             common stock.


Exchange Ratio Calculation

Calculation of Stock Price and Dividends to KLT Shareholders -- current indicated dividends
Western Exchange Stock Premium Dividend Increase Stock Ratio Value to KLT to KLT in KLT Price WR/KLT to KLT April 12 Holders (1) Dividend (1) $27.00 1.100 $29.70 24.4% $2.31 42.6% 27.50 1.100 30.25 26.7% 2.31 42.6% 28.00 1.100 30.80 29.0% 2.31 42.6% 28.50 1.100 31.35 31.3% 2.31 42.6% 29.00 1.100 31.90 33.6% 2.31 42.6% ---------------------------------------------------------------------------------------------------- Collar 29.09 1.100 32.00 34.0% 2.31 42.6% 29.50 1.085 32.00 34.0% 2.31 40.7% 30.00 1.067 32.00 34.0% 2.28 38.3% 30.50 1.049 32.00 34.0% 2.24 35.8% 31.00 1.032 32.00 34.0% 2.17 34.0% 31.50 1.016 32.00 34.0% 2.13 31.5% 32.00 1.000 32.00 34.0% 2.10 29.6% 32.50 0.985 32.00 34.0% 2.07 27.8% 33.00 0.970 32.00 34.0% 2.04 25.9% 33.50 0.955 32.00 34.0% 2.01 24.1% 34.00 0.941 32.00 34.0% 1.98 22.2% 34.50 0.928 32.00 34.0% 1.95 20.4% Collar 34.90 0.917 32.00 34.0% 1.93 19.1% ---------------------------------------------------------------------------------------------------- 35.00 0.917 32.10 34.5% 1.93 19.1% 35.50 0.917 32.55 36.3% 1.93 19.1% 36.00 0.917 33.01 38.3% 1.93 19.1% (1) Based on current indicated dividends
Western Resources / KLT / ONEOK Combined Regulated Service Territory [MAP] Strategic Priority: Seek Above Average Rates of Return in Energy-related Investments Hanover Acquired Contract Compression in 1992 for $20 million 3rd largest gas compressor rental fleet in the U.S. Merged with Hanover in 1995 and created largest gas compressor rental fleet in U.S. and 2nd largest in South America WR owns 24% of Hanover Compressor Hanover has filed to go public valuing WR's ownership at $80 to $100 million Status Report: The Wing Group Purchased in early 1996 Premier developer of power projects in the world Finalized agreement with CPI in December, involving more than 2,000 MW coal-fired generation in China Closed on Turkey project, a 478 MW combined-cycle plant Closed on project to participate in 160 MW gas-fired plant in Colombia Future View - Financial Outlook of new WR with KLT, ONEOK, and security transactions completed: Positioned to build long-term shareowner value Recurring monthly revenue under multi-year, renewable security contracts Growing revenue streams from new products and expanded markets Improved margins from operating synergies and economies of scale Continued acquisition efforts consistent with growth strategy Delivering on our strategy will ensure continued access to capital markets Committed to maintaining investment grade credit quality This analysts' presentation is neither an offer nor an exchange nor a solicitation of an offer to exchange shares of common stock of ADT Limited. Such offer is made solely by the Prospectus dated March 14, 1997, and the related Letter of Transmittal, and is not being made to, nor will tenders be accepted from or on behalf of, holders of shares of common stock of ADT Limited in any jurisdiction in which the making of such offer or the acceptance thereof would not be in compliance with the laws of such jurisdiction. In any jurisdictions where securities, blue sky or other laws require such offer to be made by a licensed broker or dealer, such offer shall be deemed to be made on behalf of Western Resources, Inc. by Salomon Brothers Inc; Bear, Stearns & Co. Inc; and Chase Securities Inc, or one or more registered brokers or dealers licensed under the laws of such jurisdiction. Exhibit No. (a)(9) The following news release/employee update was issued on April 16, 1997: WESTERN RESOURCES CHALLENGES STRUCTURE OF ADT/TYCO COMBINATION TOPEKA, Kansas, April 16, 1997 (4 pm CDT) -- Western Resources (NYSE:WR) announced today that it has commenced a lawsuit against ADT Limited in the Supreme Court of Bermuda alleging that the structure of Tyco International Ltd.'s proposed acquisition of ADT Limited denies Western Resources and other ADT shareholders their valuable appraisal rights provided under Bermuda law. Such appraisal rights, which give shareholders a right to be paid the fair value of their shares in cash, are valuable in the context of the Tyco transaction because the value of that transaction to ADT shareholders depends on Tyco's stock price, which has fluctuated considerably since announcement of the merger agreement. The lawsuit seeks an order requiring that Tyco's acquisition of ADT be structured to provide appraisal rights to ADT shareholders. - 30 - Western Resources (NYSE:WR) is a full-service, diversified security and energy company with total assets of more than $6 billion. Its utilities, KPL and KGE, operating in Kansas and Oklahoma, provide natural gas service to approximately 650,000 customers and electric service to approximately 600,000 customers. Western Resources, through its subsidiary, Westar Security, also is the third-largest monitored security provider in the country, operating in 46 states in the U.S. Through its other subsidiaries, Westar Energy, Westar Capital, and The Wing Group, a full range of energy and energy-related products and services are developed and marketed in the continental U.S. and offshore. For more information about Western Resources and its operating companies, visit us on the Internet at http://www.wstnres.com. This news release/employee update is neither an offer nor an exchange nor a solicitation of an offer to exchange shares of common stock of ADT Limited. Such offer is made solely by the Prospectus dated March 14, 1997, and the related Letter of Transmittal, and is not being made to, nor will tenders be accepted from or on behalf of, holders of shares of common stock of ADT Limited in any jurisdiction in which the making of such offer or the acceptance thereof would not be in compliance with the laws of such jurisdiction. In any jurisdictions where securities, blue sky or other laws require such offer to be made by a licensed broker or dealer, such offer shall be deemed to be made on behalf of Western Resources, Inc. by Salomon Brothers Inc; Bear, Stearns & Co. Inc; and Chase Securities Inc, or one or more registered brokers or dealers licensed under the laws of such jurisdiction.