SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549
                                 ---------------

                                    FORM 8-K

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



Date of Report (Date of earliest event reported)          March 20, 2000
                                                --------------------------------
                               Trenwick Group Inc.
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             (Exact Name of Registrant as Specified in its Charter)



Delaware                             1-15389                     06-1152790
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State or Other Jurisdiction        (Commission                 (IRS Employer
of Incorporation)                   File Number)             Identification No.)



One Canterbury Green, Stamford, Connecticut                         06901
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(Address of Principal Executive Offices)                         (Zip Code)



Registrant's telephone number, including area code     (203) 353-5500
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          (Former Name or Former Address, if Changed Since Last Report)







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Item 5. - Other Events

         On March  20,  2000,  Trenwick  Group  Inc.  ("Trenwick"),  LaSalle  Re
Holdings  Limited  ("LaSalle"),  LaSalle  Re  Limited  ("LaSalle  Re") and Gowin
Holdings  International  Limited entered into an Amended and Restated Agreement,
Schemes of Arrangement  and Plan of  Reorganization   (the "Amended and Restated
Agreement"),  pursuant  to  which  the  stockholders  of  Trenwick,  the  common
shareholders  of LaSalle and the minority  shareholders  of LaSalle Re will each
exchange  their  shares  on a  one-for-one  basis for  shares in a newly  formed
Bermuda company (the "Business Combination"). The Amended and Restated Agreement
revises the structure of the plan of  reorganization of Trenwick in anticipation
of the Business Combination.  The Amended and Restated Agreement does not change
the schemes of arrangement,  the exchange ratio for Trenwick, LaSalle or LaSalle
Re shareholders or any of the other material terms of the Business  Combination.
See the full text of the Amended and Restated  Agreement which is filed herewith
as Exhibit 2.2 and which is incorporated by reference herein.

         The Stock Option  Agreements,  each dated as of December  19, 1999,  in
which Trenwick and LaSalle granted to each other options to purchase up to 19.9%
of their  outstanding  shares remain in effect  without  change.  Likewise,  the
Shareholders  Agreement,  dated as of December  19, 1999,  between  Trenwick and
certain shareholders of LaSalle and LaSalle Re remains in effect without change

Item 7. Financial Statements and Exhibits

(c)      Exhibits

2.1      Agreement,   Scheme  of  Arrangement,   Plan  of  Merger  and  Plan  of
         Reorganization,  dated as of December 19, 1999, by and among LaSalle Re
         Holdings  Limited,  LaSalle Re Limited,  Trenwick Group Inc.,  Trenwick
         Group  (Delaware)  Inc.  and  Gowin  Holdings   International  Limited.
         Incorporated  by reference to Exhibit 2.1 to Trenwick Group Inc.'s Form
         8-K, dated December 22, 1999 (File No. 1-15389).

2.2      Amended  and  Restated  Agreement,  Schemes  of Arrangement and Plan of
         Reorganization, dated  as  of  March 20, 2000,  by and among LaSalle Re
         Holdings  Limited,  LaSalle  Re Limited,  Trenwick Group Inc. and Gowin
         Holdings International Limited.

99.1     Stock Option Agreement, dated as of December 19, 1999, between Trenwick
         Group Inc. and LaSalle Re Holdings  Limited  (option granted to LaSalle
         Re Holdings  Limited).  Incorporated  by  reference  to Exhibit 99.1 to
         Trenwick  Group  Inc.'s  Form 8-K,  dated  December  22, 1999 (File No.
         1-15389).

99.2     Stock Option Agreement, dated as of December 19, 1999, between Trenwick
         Group Inc. and LaSalle Re Holdings  Limited (option granted to Trenwick
         Group  Inc.).  Incorporated  by  reference  to Exhibit 99.2 to Trenwick
         Group Inc.'s Form 8-K, dated December 22, 1999 (File No. 1-15389).


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99.3     Shareholders  Agreement,  dated as of December 19,  1999,  by and among
         Trenwick Group Inc.,  Combined  Insurance Company of America,  Virginia
         Surety Company,  Inc., Aon Risk Consultants (Bermuda) Ltd., Continental
         Casualty Company and CNA (Bermuda)  Services  Limited.  Incorporated by
         reference  to Exhibit  99.3 to Trenwick  Group  Inc.'s Form 8-K,  dated
         December 22, 1999 (File No. 1-15389).

99.4     Press  release of Trenwick  Group Inc. and LaSalle Re Holdings  Limited
         issued December 19, 1999.  Incorporated by reference to Exhibit 99.4 to
         Trenwick  Group  Inc.'s  Form 8-K,  dated  December  22, 1999 (File No.
         1-15389).


                                    SIGNATURE

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

                                            TRENWICK GROUP INC.


                                           By: /s/ James F. Billett, Jr.
                                               ---------------------------------
                                               James F. Billett, Jr.
                                               Chairman, President and
                                               Chief Executive Officer




Dated:  March 20, 2000









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                                  EXHIBIT INDEX



Exhibit                    Description of Exhibit

2.1      Agreement,   Scheme  of  Arrangement,   Plan  of  Merger  and  Plan  of
         Reorganization,  dated as of December 19, 1999, by and among LaSalle Re
         Holdings  Limited,  LaSalle Re Limited,  Trenwick Group Inc.,  Trenwick
         Group  (Delaware)  Inc.  and  Gowin  Holdings   International  Limited.
         Incorporated  by reference to Exhibit 2.1 to Trenwick Group Inc.'s Form
         8-K, dated December 22, 1999 (File No. 1-15389).

2.2      Amended  and  Restated  Agreement, Schemes  of Arrangement and  Plan of
         Reorganization, dated  as  of March 20, 2000, by  and  among LaSalle Re
         Holdings Limited,  LaSalle Re Limited,  Trenwick Group Inc.  and  Gowin
         Holdings International Limited.

99.1     Stock Option Agreement, dated as of December 19, 1999, between Trenwick
         Group Inc. and LaSalle Re Holdings  Limited  (option granted to LaSalle
         Re Holdings  Limited).  Incorporated  by  reference  to Exhibit 99.1 to
         Trenwick  Group  Inc.'s  Form 8-K,  dated  December  22, 1999 (File No.
         1-15389).

99.2     Stock Option Agreement, dated as of December 19, 1999, between Trenwick
         Group Inc. and LaSalle Re Holdings  Limited (option granted to Trenwick
         Group  Inc.).  Incorporated  by  reference  to Exhibit 99.2 to Trenwick
         Group Inc.'s Form 8-K, dated December 22, 1999 (File No. 1-15389).

99.3     Shareholders  Agreement,  dated as of December 19,  1999,  by and among
         Trenwick Group Inc.,  Combined  Insurance Company of America,  Virginia
         Surety Company,  Inc., Aon Risk Consultants (Bermuda) Ltd., Continental
         Casualty Company and CNA (Bermuda)  Services  Limited.  Incorporated by
         reference  to Exhibit  99.3 to Trenwick  Group  Inc.'s Form 8-K,  dated
         December 22, 1999 (File No. 1-15389).

99.4     Press  release of Trenwick  Group Inc. and LaSalle Re Holdings  Limited
         issued December 19, 1999.  Incorporated by reference to Exhibit 99.4 to
         Trenwick  Group  Inc.'s  Form 8-K,  dated  December  22, 1999 (File No.
         1-15389).