Exhibit 2


                               AMENDMENT NO. 1 TO
                                RIGHTS AGREEMENT

         THIS AMENDMENT No. 1 (the "Amendment"),  dated as of December 19, 1999,
is between Trenwick Group Inc., a Delaware corporation (the "Company") and First
Chicago Trust Company of New York, a New York corporation (the "Rights Agent").


                                    Recitals

         WHEREAS,  the  Company  and the  Rights  Agent are  parties to a Rights
Agreement dated as of September 24, 1997 (the "Rights Agreement");

         WHEREAS,  LaSalle Re Holdings Limited, a Bermuda corporation  ("LaSalle
Holdings"),  LaSalle Re Limited,  a Bermuda  corporation  ("LaSalle Re"),  Gowin
Holdings International Limited, a Bermuda corporation ("New Holdings"), Trenwick
Group (Delaware) Inc.  ("Trenwick  Delaware") and the Company,  propose to enter
into  an  Agreement,  Scheme  of  Arrangement,   Plan  of  Merger  and  Plan  of
Reorganization (the "Business  Combination  Agreement") pursuant to which, among
other things,  (i) the Company will merge with and into a single member Delaware
limited liability company wholly-owned by Trenwick Delaware, with holders of the
common stock, par value $.10 per share, of the Company receiving an equal number
of Trenwick  Delaware  shares,  (ii) Trenwick  Delaware will exchange all of its
assets and  liabilities  for a number of common shares of New Holdings  equal to
the number of shares of Trenwick Delaware then currently outstanding, which will
be effected concurrently with the exchange of common shares of New Holdings with
the shareholders of LaSalle  Holdings and LaSalle Re on a one-for-one  basis and
(iii)  Trenwick  Delaware  will  distribute  all of the  shares of New  Holdings
received by Trenwick  Delaware to the holders of the shares of Trenwick Delaware
in a complete liquidation of Trenwick Delaware;

         WHEREAS,  in connection with the execution and delivery of the Business
Combination  Agreement,  the Company and LaSalle  Holdings will enter into Stock
Option Agreements, pursuant to which the Company will grant LaSalle Holdings the
option to  purchase  shares of common  stock,  par value $.10 per share,  of the
Company  and LaSalle  Holdings  will grant to the Company the option to purchase
common shares,  par value $1.00 per share,  of LaSalle  Holdings,  each upon the
terms and subject to the conditions set forth therein;

         WHEREAS,  in connection with the execution and delivery of the Business
Combination Agreement,  the Company and certain shareholders of LaSalle Holdings
and LaSalle Re will enter into a Shareholders Agreement,  pursuant to which such
shareholders will agree to vote in favor of the transactions contemplated by the
Business Combination Agreement;

         WHEREAS,  pursuant to Section 27 of the Rights Agreement,  the Board of
Directors  of the  Company  has  determined  that  an  amendment  to the  Rights
Agreement  as set  forth  herein is  necessary  and  desirable  to  reflect  the
foregoing and certain other matters, and the Company and the Rights Agent desire
to evidence such amendment in writing.

         Accordingly, the parties agree as follows:

         1. Amendment of Section 1(a).  Section 1 (a) of the Rights Agreement is
amended by inserting  the  following at the end of the  definition of "Acquiring
Person" in Section 1(a):


                                      -1-








                  "In addition,  notwithstanding  anything in this  Agreement to
         the  contrary,   neither  LaSalle  Re  Holdings   Limited,   a  Bermuda
         corporation  ("LaSalle  Holdings"),   LaSalle  Re  Limited,  a  Bermuda
         corporation  ("LaSalle Re"), Gowin Holdings  International  Limited,  a
         Bermuda  corporation ("New  Holdings"),  Trenwick Group (Delaware) Inc.
         ("Trenwick  Delaware")  nor  any  Affiliate  or  Associate  of  LaSalle
         Holdings, LaSalle Re, New Holdings or Trenwick Delaware shall be deemed
         to be an Acquiring  Person solely by virtue of the execution,  delivery
         and performance of (w) the Agreement,  Scheme of  Arrangement,  Plan of
         Merger and Plan of Reorganization, to be dated as of December 19, 1999,
         among LaSalle Holdings, LaSalle Re, New Holdings, Trenwick Delaware and
         the Company,  as it may be amended or supplemented from time to time in
         accordance with its terms (the "Business Combination  Agreement"),  (x)
         the LaSalle  Stock  Option  Agreement  and the  Trenwick  Stock  Option
         Agreement,  each to be dated  as of  December  19,  1999,  between  the
         Company and LaSalle  Holdings,  as each may be amended or  supplemented
         from time to time in accordance  with its terms  (together,  the "Stock
         Option Agreements"),  (y) the Shareholders Agreement, to be dated as of
         December 19, 1999, by and among the Company and certain shareholders of
         LaSalle  Holdings and LaSalle Re, as it may be amended or  supplemented
         from  time to time in  accordance  with its  terms  (the  "Shareholders
         Agreement") or (z) any of the transactions contemplated by the Business
         Combination Agreement,  the Stock Option Agreements or the Shareholders
         Agreement."

         2. Amendment of Section 3(a).  Section 3(a) of the Rights  Agreement is
amended by adding the following sentence at the end thereof:

         "Notwithstanding  the foregoing or anything in this Rights Agreement to
         the contrary,  a Distribution Date shall not be deemed to have occurred
         solely by virtue  of the  execution,  delivery  or  performance  of the
         Business  Combination  Agreement,  the Stock Option  Agreements  or the
         Shareholders  Agreement or solely by virtue of any of the  transactions
         contemplated by the Business  Combination  Agreement,  the Stock Option
         Agreements or the Shareholders Agreement."

         3. Amendment of Section 7(a).  Section 7(a) of the Rights  Agreement is
amended by deleting  such Section in its entirety and inserting in its place the
following:

         "Subject to Section 7(e) hereof,  the  registered  holder of any Rights
         Certificate  may  exercise  the  Rights  evidenced  thereby  (except as
         otherwise   provided  herein   including,   without   limitation,   the
         restrictions on exercisability set forth in Section 9(c), Section 11(a)
         (iii) and Section  23(a)  hereof) in whole or in part at any time after
         the Distribution  Date upon surrender of the Rights  Certificate,  with
         the form of  election to purchase  and the  certificate  on the reverse
         side  thereof  duly  executed,  to the Rights  Agents at the  principal
         office or offices,  of the Rights Agent  designated  for such  purpose,
         together with payment of the aggregate  Purchase  Price with respect to
         the total number of one two-hundredths of a share (or other securities,
         cash or other assets,  as the case may be) as to which such surrendered
         Rights are then  exercisable,  at or prior to the  earliest  of (i) the
         close of business on September 23, 2007 (the "Final Expiration  Date"),
         (ii) the time at which the Rights are  redeemed as provided in Sections
         23 and 24 hereof or (iii)  immediately  prior to the effective  time of
         the  transactions   (the   "Restructuring")   contemplated  by  and  in
         accordance with the terms of the Business  Combination  Agreement,  the
         Stock Option Agreements and the Shareholders Agreement (the earliest of
         (i),  (ii)  and  (iii)  being  herein  referred  to as the  "Expiration
         Date")."

4.       Amendment of Section 11.  Section 11 of the Rights Agreement is hereby
amended by inserting the following sentence at the end of such Section:




                                      -2-

         "Notwithstanding the foregoing,  this Section 11 shall not apply to the
         restructuring  or as a result  of the  execution  and  delivery  of the
         Business  Combination  Agreement,  the  Stock  Option  Agreements,  the
         Shareholders Agreement or the transactions contemplated thereby."

         5.   Amendment of Section 13.  Section 13 of the Rights Agreement is
hereby amended by inserting the following sentence at the end of such Section:

         "Notwithstanding the foregoing,  this Section 13 shall not apply to the
         Restructuring  or as a result  of the  execution  and  delivery  of the
         Business  Combination  Agreement,  the Stock Option  Agreements  or the
         Shareholders Agreement or the transactions contemplated thereby."

         6.  Effectiveness.  This Amendment shall be deemed  effective as of the
date hereof as if executed on such date.  Except as amended  hereby,  the Rights
Agreement  shall  remain  in full  force  and  affect  and  shall  be  otherwise
unaffected hereby.

         7. Miscellaneous.  This Amendment shall be deemed to be a contract made
under the laws of the State of Delaware and for all  purposes  shall be governed
by and  construed  in  accordance  with the  laws of such  state  applicable  to
contracts to be made and performed  entirely  within such State.  This Amendment
may be executed in any number of counterparts,  each of such counterparts  shall
for all  purposes be deemed to be an original  and all such  counterparts  shall
together  constitute but one and the same  instrument.  If any term,  provision,
covenant  or  restriction  of this  Amendment  is held by a court  of  competent
jurisdiction  or other  authority  to be  invalid,  void or  unenforceable,  the
remainder of the terms, provisions, covenants and restrictions of this Amendment
shall remain in full force and effect and shall in no way be affected,  impaired
or invalidated.

















                                      -3-



         IN WITNESS WHEREOF, the parties hereto have caused this Amendment No. 1
         to be duly executed and their respective corporate seals to be hereunto
         affixed and attested, all as of the date and year first above written.

                                                TRENWICK GROUP INC.


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

Attest:



/s/ John V. Del Col
    --------------------
Name:  John V. Del Col
Title: Senior Vice President,
       General Counsel & Secretary


                                                FIRST CHICAGO TRUST COMPANY
                                                OF NEW YORK
                                                as Rights Agent


                                                By: /s/ Michael S. Duncan
                                                    ----------------------------
                                                Name:   Michael S. Duncan
                                                Title:  Director, Corporate
                                                        Actions


Attest:


/s/ Mark Gherzo
- ----------------------
Name:    Mark Gherzo
Title:   Assistant Vice President