8-K

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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

                                    FORM 8-K

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

       Date of Report (date of earliest event reported) - August 20, 2003

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

                               TRENWICK GROUP LTD.
             (Exact name of registrant as specified in its charter)

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

      LOM Building, 27 Reid Street
       Hamilton, HM 11, Bermuda                                   Not Applicable
(Address of principal executive offices)                            (Zip Code)

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

                                      None
             (Former name or address, if changed since last report)




Item 3. Bankruptcy or Receivership.

      On August 20, 2003, Trenwick Group Ltd. ("Trenwick"), LaSalle Re Holdings
Limited ("LaSalle Re Holdings") and Trenwick America Corporation ("Trenwick
America" and collectively with LaSalle Re Holdings and Trenwick, the "Debtors"),
each filed voluntary petitions for relief under Chapter 11 of Title 11 of the
United States Code (the "Bankruptcy Code") in the United States Bankruptcy Court
for the District of Delaware (the "Bankruptcy Court"). The proceedings are
consolidated for administrative purposes only under Case Nos. 03-12635 through
03-12637. The Debtors remain in possession of their assets and properties, and
continue to operate their businesses and manage their properties, as
"debtors-in-possession" under the jurisdiction of the Bankruptcy Court and in
accordance with the applicable provisions of the Bankruptcy Code.

      Also on August 20, 2003, Trenwick and LaSalle Re Holdings filed insolvency
proceedings in the Supreme Court of Bermuda (the "Bermuda Court"). On August 22,
2003, the Bermuda Court granted an order appointing Michael Morrison and John
Wardrop, partners of KPMG in Bermuda and KPMG LLP in the U.K., as Joint
Provisional Liquidators ("JPLs") in respect of Trenwick and LaSalle Re Holdings.
The Bermuda Court granted the JPLs the power to oversee the continuation and
reorganization of these companies' businesses under the control of their Boards
of Directors and under the supervision of the Bankruptcy Court and the Bermuda
Court. Neither KPMG nor the JPLs have audited the contents of this filing.

      Trenwick's insurance company subsidiaries, Trenwick America Reinsurance
Corporation, The Insurance Corporation of New York, Dakota Specialty Insurance
Company and LaSalle Re Limited, all of which are in runoff, and its Lloyd's
operations are not subject to the proceedings in the Bankruptcy Court or the
Bermuda Court and their operations continue.

      On August 20, 2003, Trenwick issued a press release relating to the
foregoing, a copy of which is attached hereto as Exhibit 99.1 and is
incorporated herein in its entirety by reference.

Item 5. Other Events and Required FD Disclosure.

      On September 2, 2003, Anthony S. Brown, Robert M. DeMichele, Joseph D.
Sargent and Stephen R. Wilcox resigned from the Board of Directors of Trenwick.
The Board of Directors elected Alan L. Hunte and Timothy R. Graham to the Board
to serve until their successors are duly elected and qualified.

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

      (c) Exhibits.

      Exhibit No.       Description
      -----------       -----------

      99.1              Press Release of Trenwick Group Ltd. issued August 20,
                        2003.




                                   SIGNATURES

            Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this Report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                            TRENWICK GROUP LTD.

                                            By:  /s/ Alan L. Hunte
                                                 -------------------------
                                            Title:  Executive Vice President
                                                    & Chief Financial Officer

Dated: September 4, 2003




                                  EXHIBIT INDEX

Exhibit No.       Description
- -----------       -----------

99.1              Press Release of Trenwick Group Ltd. issued August 20, 2003.

EX-99.1

                      [LETTERHEAD OF TRENWICK GROUP LTD.]

      Contact:  Alan L. Hunte, Executive Vice President and Chief Financial
                Officer - 441.292.4985

      For Immediate Release

          Trenwick Group Ltd., LaSalle Re Holdings Limited and Trenwick
         America Corporation File U.S. Chapter 11 Bankruptcy Proceedings
                 to Initiate Previously Announced Restructuring.
           Insurance Company Subsidiaries Not a Party to Proceedings.

Hamilton, Bermuda, August 20, 2003...

Trenwick Group Ltd. ("Trenwick") (OTC: TWKGF) stated today that it and its
affiliates, LaSalle Re Holdings Limited ("LaSalle Re Holdings") and Trenwick
America Corporation ("Trenwick America," and collectively with LaSalle Re
Holdings and Trenwick, the "Debtors"), as a step in its previously announced
restructuring and in accordance with its August 6 letter of intent with
creditors (the "Letter of Intent"), filed for protection under chapter 11 of the
United States Bankruptcy Code (the "Bankruptcy Code") with the United States
Bankruptcy Court for the District of Delaware (the "Bankruptcy Court").
Additionally, Trenwick and LaSalle Re Holdings are in the process of filing
proceedings in the Supreme Court of Bermuda, known under Bermudian law as
"winding up", as a further step in the restructuring and in accordance with the
previously announced Letter of Intent. Trenwick's insurance company
subsidiaries, Trenwick America Reinsurance Corporation, The Insurance
Corporation of New York, Dakota Specialty Insurance Company and LaSalle Re
Limited, all of which are in runoff, and its Lloyd's operations are not subject
to the proceedings in the Bankruptcy Court or the Supreme Court of Bermuda and
their operations continue.




Background Information

Trenwick is a Bermuda-based specialty insurance and reinsurance underwriting
organization with subsidiaries located in the United States, the United Kingdom
and Bermuda. Trenwick's operations at Lloyd's, London underwrite specialty
insurance as well as treaty and facultative reinsurance on a worldwide basis.
Trenwick's United States specialty program business, specialty London market
insurance company, Trenwick International Limited, and its United States
reinsurance business through Trenwick America Reinsurance Corporation are now in
runoff. In 2002, Trenwick sold the in-force business of LaSalle Re Limited, its
Bermuda based subsidiary.

Safe Harbor for Forward-Looking Statements

Certain statements made in this press release that are not based on current or
historical facts are forward-looking in nature including, without limitation,
statements containing words "believes," "anticipates," "plans," "projects,"
"intends," "expects," "estimates," "predicts," and words of similar import. Such
forward-looking statements, including in particular Trenwick's forecast of
future results, involve known and unknown risks, assumptions, uncertainties, and
other factors disclosed in Trenwick's filings with the Securities and Exchange
Commission that may cause actual results, performance, or achievements of
Trenwick to differ materially from any future results, performance, or
achievements expressed or implied by such forward-looking statements. In
particular, forecasting of reserves for future losses is based on historical
experience and future assumptions. As a result they are inherently subjective
and may fluctuate based on actual future experience and changes to current or
future trends in the legal, social or economic environment. Trenwick undertakes
no obligation to update or revise any forward-looking statements, whether as a
result of new information, future events or otherwise.