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) September 6, 2002

                               Trenwick Group Ltd.
             (Exact Name of Registrant as Specified in its Charter)

Bermuda                              1-16089                     98-0232340
State or Other Jurisdiction        (Commission                 (IRS Employer
of Incorporation)                  File Number)              Identification No.)

LOM Building, 27 Reid Street
Hamilton, HM 11, Bermuda                                        Not Applicable
(Address of Principal Executive Offices)                           (Zip Code)

Registrant's telephone number, including area code (441) 292-4985

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          (Former Name or Former Address, if Changed Since Last Report)



Item 5. - Other Events

      On September 6, 2002 Trenwick Group Ltd. ("Trenwick"), entered into a
Settlement Agreement, a Second Amended and Restated Catastrophe Equity
Securities Issuance Option Agreement and Amendment No. 1 to Registration Rights
Agreement, each dated September 6, 2002, pursuant to which Trenwick and European
Reinsurance Company of Zurich ("European Re") agreed to the settlement of the
outstanding arbitration between Trenwick and European Re and the purchase by
European Re of 550,000 Series B Cumulative Convertible Perpetual Preferred
Shares of Trenwick for a purchase price of $40,000,000.

      On September 6, 2002, Trenwick issued a press release announcing the
transaction. A copy of the press release is filed herewith as Exhibit 99.5 and
is incorporated by reference herein.

Item 7. Financial Statements and Exhibits

(c)   Exhibits

99.1  Settlement Agreement, dated as of September 6, 2002, between Trenwick
      Group Ltd. and European Reinsurance Company of Zurich.

99.2  Second Amended and Restated Catastrophe Equity Securities Issuance Option
      Agreement, dated as of September 6, 2002, between Trenwick Group Ltd. and
      European Reinsurance Company of Zurich.

99.3  Certificate of Designation, Preferences and Rights of Series B Cumulative
      Convertible Perpetual Preferred Shares of Trenwick Group Ltd.

99.4  Amendment No. 1 to Registration Rights Agreement, dated as of September 6,
      2002, between Trenwick Group Ltd. and European Reinsurance Company of
      Zurich.

99.5  Press release of Trenwick Group Ltd. issued September 6, 2002.


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                                    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 LTD.


                                            By: /s/ W. Marston Becker
                                                --------------------------------
                                                W. Marston Becker
                                                Acting Chairman and
                                                Acting Chief Executive Officer

Dated: September 10, 2002


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