TRENWICK GROUP INC
8-K, 2000-03-20
FIRE, MARINE & CASUALTY INSURANCE
Previous: TEXAS REGIONAL BANCSHARES INC, DEF 14A, 2000-03-20
Next: PENNICHUCK CORP, DEF 14A, 2000-03-20






                       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.
- --------------------------------------------------------------------------------
             (Exact Name of Registrant as Specified in its Charter)



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



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



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







                                        1

<PAGE>

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).


                                       2

<PAGE>

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









                                       3
<PAGE>


                                  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).





                              AMENDED AND RESTATED
                                   AGREEMENT,
                             SCHEMES OF ARRANGEMENT
                                       AND
                             PLAN OF REORGANIZATION
                                  BY AND AMONG
                          LASALLE RE HOLDINGS LIMITED,
                               LASALLE RE LIMITED,
                               TRENWICK GROUP INC.
                                       AND
                      GOWIN HOLDINGS INTERNATIONAL LIMITED



                           DATED AS OF MARCH 20, 2000







<PAGE>



                                TABLE OF CONTENTS



ARTICLE 1         CERTAIN DEFINITIONS.........................................2
         Section 1.1.      Certain Definitions................................2

ARTICLE 2         THE PLANS ..................................................6
         Section 2.1.      The Plans..........................................6
         Section 2.2.      Application to the Court; Shareholder Meetings;
                           Effective Time of the Plans; Closing...............6
         Section 2.3.      Effects of the Plans...............................7
         Section 2.4.      Governing Documents................................8
         Section 2.5.      Board of Directors of New Holdings.................8
         Section 2.6.      Terms of the Schemes of Arrangement: Exchange
                           of Securities......................................8
         Section 2.7.      Terms of the Plan of Reorganization: Issuance
                           of Securities..................................... 9
         Section 2.8.      Terms of the Schemes of Arrangement: Surrender
                           and Payment.......................................10
         Section 2.9.      Terms of the Plan of Reorganization: Surrender
                           and Payment.......................................12
         Section 2.10.     Voting............................................13
         Section 2.11.     Lost Certificates.................................13
         Section 2.12.     No Fractional Shares..............................13

ARTICLE 3         REPRESENTATIONS AND WARRANTIES OF TRENWICK.................14
         Section 3.1.      Corporation; Organization.........................14
         Section 3.2.      Authority; Approval and Fairness..................15
         Section 3.3.      Capital Structure.................................16
         Section 3.4.      SEC Reports; Financial Statements.................17
         Section 3.5.      Absence of Certain Changes or Events..............18
         Section 3.6.      Certain Fees......................................18
         Section 3.7.      No Defaults.......................................19
         Section 3.8.      Consents..........................................19
         Section 3.9.      Compliance with Applicable Law....................19
         Section 3.10.     Information Supplied..............................20
         Section 3.11.     Material Contracts................................20
         Section 3.12.     Taxes.............................................21
         Section 3.13.     Litigation........................................22
         Section 3.14.     Title to Properties; Leases.......................23
         Section 3.15.     Employees.........................................23
         Section 3.16.     Benefit Plans.....................................24
         Section 3.17.     Intellectual Property.............................29
         Section 3.18.     Takeover Statutes.................................30
         Section 3.19.     Opinion of Financial Advisor......................30


                                       ii

<PAGE>



         Section 3.20.     Rights Agreement..................................30
         Section 3.21.     Insurance Matters.................................31
         Section 3.22.     Liabilities and Reserves..........................32
         Section 3.23.     Investment Company................................32
         Section 3.24.     Finite Risk Reinsurance...........................32
         Section 3.25.     Reinsurance Contracts, Coverholders and MGAs......32
         Section 3.26.     Derivatives.......................................33
         Section 3.27.     Related Party Transactions........................33

ARTICLE 4         REPRESENTATIONS AND WARRANTIES OF
                  LASALLE HOLDINGS...........................................34
         Section 4.1.      Corporation; Organization.........................34
         Section 4.2.      Authority; Approval and Fairness..................35
         Section 4.3.      Capital Structure.................................35
         Section 4.4.      SEC Reports; Financial Statements.................37
         Section 4.5.      Absence of Certain Changes or Events..............38
         Section 4.6.      Certain Fees......................................38
         Section 4.7.      No Defaults.......................................38
         Section 4.8.      Consents..........................................39
         Section 4.9.      Compliance with Applicable Law....................39
         Section 4.10.     Information Supplied..............................40
         Section 4.11.     Material Contracts................................40
         Section 4.12.     Taxes.............................................41
         Section 4.13.     Litigation........................................42
         Section 4.14.     Title to Properties; Leases.......................42
         Section 4.15.     Approval of Schemes of Arrangement................43
         Section 4.16.     Employees.........................................43
         Section 4.17.     Intellectual Property.............................44
         Section 4.18.     Takeover Statutes.................................45
         Section 4.19.     Opinions of Financial Advisors....................45
         Section 4.20.     Insurance Matters.................................45
         Section 4.21.     Liabilities and Reserves..........................46
         Section 4.22.     Investment Company................................46
         Section 4.23.     Reinsurance Contracts, Coverholders and MGAs......46
         Section 4.24.     Derivatives.......................................47
         Section 4.25.     Related Party Transactions........................47
         Section 4.26.     Finite Risk Reinsurance...........................47



                                       iii

<PAGE>



ARTICLE 5         COVENANTS..................................................47
         Section 5.1.      Conduct of Business of Trenwick...................47
         Section 5.2.      Conduct of Business of LaSalle Holdings...........50
         Section 5.3.      No Solicitation...................................54
         Section 5.4.      Access to Information; Confidentiality............58
         Section 5.5.      Form S-4; Regulatory Matters......................58
         Section 5.6.      Public Announcements..............................58
         Section 5.7.      Supplemental Information..........................59
         Section 5.8.      Shareholders' Meetings............................59
         Section 5.9.      Trenwick Options, LaSalle Holdings Options,
                           LaSalle Re Options and Trenwick Warrants..........60
         Section 5.10.     Takeover Laws.....................................62
         Section 5.11.     Affiliates........................................62
         Section 5.12.     Stock Exchange Listing............................62
         Section 5.13.     Indemnification and Insurance.....................63
         Section 5.14.     Commercially Reasonable Efforts...................64
         Section 5.15.     Post-Closing Matters..............................64
         Section 5.16.     Employee Benefit Plans; Existing Agreements.......64
         Section 5.17.     Letters from Accountants..........................65
         Section 5.18.     Litigation........................................66
         Section 5.19.     Advice of Changes.................................66
         Section 5.20.     Trenwick Rights Agreement.........................66
         Section 5.21.     New Holdings Rights Agreement.....................66
         Section 5.22.     Assumption of Non-Voting Share Conversion
                           Obligation........................................66
         Section 5.23.     Assumption of Series B Preferred Share
                           Conversion Obligation.............................67
         Section 5.24.     Tax-Free Reorganization...........................67

ARTICLE 6         CONDITIONS TO THE PLANS....................................67
         Section 6.1.      Conditions to Each Party's Obligation to
                           Effect the Plans..................................67
         Section 6.2.      Additional Conditions to Trenwick's Obligation
                           to Effect the Plans...............................69
         Section 6.3.      Additional Conditions to LaSalle Holdings'
                           Obligation to Effect the Plans....................71

ARTICLE 7         TERMINATION AND ABANDONMENT................................72
         Section 7.1.      Termination by Trenwick or LaSalle Holdings.......72
         Section 7.2.      Termination by Trenwick...........................73
         Section 7.3.      Termination by LaSalle Holdings...................74
         Section 7.4.      Procedure and Effect of Termination...............74



                                       iv

<PAGE>



ARTICLE 8         MISCELLANEOUS PROVISIONS...................................75
         Section 8.1.      Non-Survival of Representations, Warranties
                           Covenants and Agreements..........................75
         Section 8.2.      Amendment and Modification........................75
         Section 8.3.      Waiver of Compliance; Consents....................76
         Section 8.4.      Severability and Validity.........................76
         Section 8.5.      Expenses and Obligations..........................76
         Section 8.6.      Parties in Interest...............................76
         Section 8.7.      Notices...........................................77
         Section 8.8.      Governing Law.....................................78
         Section 8.9.      Counterparts......................................78
         Section 8.10.     Headings..........................................78
         Section 8.11.     Entire Agreement; Assignment......................79
         Section 8.12.     Interpretation....................................79


                             SCHEDULES AND EXHIBITS

         Schedule I        Minority Shareholders
         Exhibit A-1       LaSalle Stock Option Agreement
         Exhibit A-2       Trenwick Stock Option Agreement
         Exhibit B-1       Memorandum of Association of New Holdings
         Exhibit B-2       Bye-Laws of New Holdings
         Exhibit C         New Holdings Directors








                                        v

<PAGE>



                         AMENDED AND RESTATED AGREEMENT,
                SCHEMES OF ARRANGEMENT AND PLAN OF REORGANIZATION

         This Amended and Restated Agreement, Schemes of Arrangement and Plan of
Reorganization  (this "Agreement") is made as of the 20th day of March, 2000, by
and among LaSalle Re Holdings  Limited,  a company  organized  under the laws of
Bermuda ("LaSalle Holdings"),  LaSalle Re Limited, a company organized under the
laws of Bermuda and a  majority-owned  Subsidiary (as defined herein) of LaSalle
Holdings   ("LaSalle   Re"),   Trenwick  Group  Inc.,  a  Delaware   corporation
("Trenwick") and Gowin Holdings International Limited, a company organized under
the laws of Bermuda which will be changing its name to Trenwick Group Ltd. prior
to the  Effective  Time, as defined  herein,  ("New  Holdings"),  and amends and
restates  the  Agreement,  Scheme of  Arrangement,  Plan of  Merger  and Plan of
Reorganization  (the "Original  Agreement") dated as of December 19, 1999 by and
among LaSalle Holdings, LaSalle Re, Trenwick,  Trenwick Group (Delaware) Inc., a
Delaware corporation and New Holdings.

         WHEREAS,  the issued  share  capital of LaSalle Re  consists  of voting
common  shares,  par value $1.00 per share ("Voting  Shares"),  all of which are
beneficially owned by LaSalle Holdings,  and non-voting common shares, par value
$1.00 per share (the "Non-Voting  Shares"),  all of which are beneficially owned
by LaSalle  Holdings  and the  shareholders  of LaSalle Re listed on  Schedule I
hereto (the "Minority  Shareholders").  LaSalle Holdings owns 15,603,570  Voting
Shares and NonVoting  Shares in the  aggregate.  The Minority  Shareholders  own
4,725,546 Non-Voting Shares in the aggregate (the "Minority Shares").

         WHEREAS,  the  respective  Boards of  Directors  of  LaSalle  Holdings,
LaSalle Re,  Trenwick and New  Holdings  (a) deem it  advisable  and in the best
interests of their  respective  companies  and  shareholders  to enter into this
Agreement   whereby  (i)  each  of  LaSalle   Holdings  and  LaSalle  Re  become
Subsidiaries of New Holdings pursuant to a scheme of arrangement between LaSalle
Holdings  and the holders of its common  shares,  par value $1.00 per share (the
"LaSalle Holdings Shares") (the "LaSalle Holdings Scheme of Arrangement"), and a
scheme of  arrangement  between  LaSalle Re and the  holders  of the  Non-Voting
Shares (the  "LaSalle Re Scheme of  Arrangement,"  and together with the LaSalle
Holdings Scheme,  the "Schemes of Arrangement")  and (ii) the assets of Trenwick
are transferred to New Holdings pursuant to a plan of  reorganization  described
in Section 2.1(b) (the "Plan of  Reorganization,"  and together with the Schemes
of  Arrangement,  the  "Plans")  as  provided  for herein  and (b) have  adopted
resolutions   approving  this   Agreement,   the  Plans  and  the   transactions
contemplated hereby;

         WHEREAS, concurrently with the execution and delivery of this Agreement
and as a condition and  inducement to the  willingness  of LaSalle  Holdings and
Trenwick  to enter into this  Agreement,  LaSalle  Holdings  and  Trenwick  have
entered into (i) a Stock Option  Agreement  dated as of the date of the Original
Agreement  and  attached  hereto  as  Exhibit  A-1 (the  "LaSalle  Stock  Option
Agreement"),  pursuant to which Trenwick has granted LaSalle  Holdings an option
to  purchase a number of shares  equal to 19.9% of the then  outstanding  Common
Stock, par value $0.10 per share, of Trenwick  ("Trenwick  Shares",  which shall
refer to all such outstanding shares) and (ii) a  Stock  Option  Agreement dated


                                        1

<PAGE>


as of the date of the Original Agreement and attached hereto as Exhibit A-2 (the
"Trenwick  Stock Option  Agreement"  and together  with the LaSalle Stock Option
Agreement,  the "Stock Option  Agreements"),  pursuant to which LaSalle Holdings
has granted  Trenwick an option to purchase a number of shares equal to 19.9% of
the then outstanding LaSalle Holdings Shares;

         WHEREAS, concurrently with the execution and delivery of this Agreement
and as a condition and  inducement to the  willingness of Trenwick to enter into
this  Agreement,  Trenwick  and the  Minority  Shareholders  have entered into a
Shareholders  Agreement  pertaining  to the voting of shares  held of record and
beneficially in favor of the transactions contemplated hereby; and

         WHEREAS, the parties hereto intend that each of the Plans shall qualify
as tax-free  under the United States  Internal  Revenue Code of 1986, as amended
(the "Code").

         NOW,  THEREFORE,  in  consideration  of the  foregoing  and the  mutual
representations,  warranties,  covenants and agreements  herein  contained,  the
parties hereto agree as follows:


                                    ARTICLE 1

                               CERTAIN DEFINITIONS

         Section 1.1.      Certain Definitions. Certain  capitalized terms  used
in this Agreement shall have the meaning set forth below:

         (a) An  "Affiliate"  of, or a Person  "affiliated"  with,  a  specified
Person  means any  Person  that  directly  or  indirectly,  through  one or more
intermediaries, controls, is controlled by, or is under common control with, the
Person specified.

         (b)  "Average  Closing  Price" means an amount equal to the average per
share closing price of a Trenwick Share as reported on the NYSE for the ten (10)
NYSE trading days immediately preceding the three (3) NYSE trading days prior to
the Effective Date (as defined below).

         (c) "Business  Day" means any day other than a Saturday,  a Sunday or a
day on which  commercial  banks in Bermuda or in the State of Connecticut in the
United States of America are authorized or required by law to be closed.

         (d)  "Confidentiality  Letters"  means the  letter  agreements  between
LaSalle  Holdings  and  Trenwick,  dated as of August 30, 1999 and  November 19,
1999.

         (e)  "Control"  (including,   with  correlative  meanings,   the  terms
"controlling,"  "controlled by" and "under common control  with"),  as used with
respect to any Person, means the possession, direct  or  indirect, of the  power


                                        2

<PAGE>



to direct or cause the  direction of the  management or policies of such Person,
whether through the ownership of voting securities, by agreement or otherwise.

         (f) "Dollars" or "$" means the lawful  currency of the United States of
America.

         (g)      "Employee Benefit Plan" means

                           (i) any "employee  welfare benefit plan" or "employee
                           pension  benefit plan" (as those terms are defined in
                           sections 3(1) and 3(2) of ERISA, respectively), other
                           than a  "multiemployer  plan" (as  defined in Section
                           3(37) of ERISA);

                           (ii) any  retirement or deferred  compensation  plan,
                           incentive compensation plan, stock plan, unemployment
                           compensation plan, vacation pay, severance pay, bonus
                           or benefit arrangement,  insurance or hospitalization
                           program or any other fringe benefit  arrangements for
                           any current or former employee, director,  consultant
                           or agent, whether pursuant to contract,  arrangement,
                           custom  or  informal  understanding,  which  does not
                           constitute  an employee  benefit  plan (as defined in
                           Section 3(3) of ERISA); or

                           (iii)  any   employment   agreement   or   consulting
                           agreement.

         (h) "ERISA" means the United States Employee Retirement Income Security
Act of 1974, as amended.

         (i) "Exchange Act" means the United States  Securities  Exchange Act of
1934, as amended.

         (j) "GAAP" means generally accepted accounting  principles as in effect
in the United  States of America  (as such  principles  may change  from time to
time).

         (k) "Governmental Authority" means any governmental,quasi-governmental,
judicial or regulatory agency or entity or subdivision thereof with jurisdiction
over  Trenwick,  LaSalle  Holdings,  LaSalle  Re, New  Holdings  or any of their
respective  Subsidiaries  or  any  of  the  transactions  contemplated  by  this
Agreement   (including,   without   limitation,   the   Corporation  of  Lloyd's
("Lloyd's")).

         (l)   "Knowledge"   (i)  an  individual  will  be  considered  to  have
"Knowledge"  of a fact or matter if the individual is actually aware of the fact
or matter;  (ii) an entity will be considered to have  "Knowledge"  of a fact or
matter if any  individual  who is serving,  or who has at any time served,  as a
senior  executive of such entity has, or at any time had,  Knowledge of the fact
or  matter;  and  Trenwick  and  LaSalle  Holdings  will be  considered  to have
"Knowledge" of  a fact  or  matter  if  Trenwick or its  Subsidiaries or LaSalle



                                        3

<PAGE>



Holdings or its  Subsidiaries,  as the case may be, has Knowledge of the fact or
matter.

         (m) "LaSalle Disclosure Letter" means the letter,  dated as of the date
of the Original  Agreement,  from LaSalle Holdings to Trenwick regarding certain
matters related to this Agreement.

         (n) "LaSalle Fair Market Value" means the product of (i) the average of
the closing  sale price as reported on the NYSE  Composite  Tape for the LaSalle
Holdings  Shares for the thirty (30)  trading  days  immediately  preceding  the
Effective Date multiplied by (ii) the aggregate number of issued and outstanding
Voting Shares and Non-Voting Shares on the Effective Date.

         (o) "Lien" means any mortgage,  lien, security interest,  pledge, lease
or other charge or encumbrance of any kind, including,  without limitation,  the
lien or retained  security  title of a purchase  money  creditor or  conditional
vendor,  and any easement,  right of way or other  encumbrance  on title to real
property, and any agreement to give any of the foregoing.

         (p) "Material  Adverse Change" or "Material Adverse Effect" means, with
respect to any Person,  any change,  effect,  event,  condition or  development,
occurrence or state of facts that is materially adverse to the business, assets,
results of  operations,  properties,  financial or  operating  condition of such
party  and  its  Subsidiaries,  taken  as a  whole  or the  ability  to  perform
obligations under this Agreement;  provided,  however, that any change,  effect,
event, condition or development,  occurrence or state of facts resulting from or
arising in connection with (i) this Agreement,  the Schemes of Arrangement,  the
Plan of  Reorganization  or the transactions  contemplated  hereby or the public
announcement   thereof,   (ii)  changes   generally   affecting  the  insurance,
reinsurance or financial services industry (including,  without limitation,  the
impact  of any  natural  catastrophes  causing  a Net Loss  from a  single  loss
occurrence  and not in the  aggregate to such Persons of  $100,000,000  or less,
(iii) changes in the value of portfolio  investments  resulting  from changes in
prevailing  interest  rates,  (iv)  changes  in  economic  or market  conditions
generally,  (v)  changes  in  laws,  regulations,   accounting  principles,   or
regulations or policies of general  applicability or (vi) changes resulting from
actions or omissions of a party hereto taken with the prior  written  consent of
the other parties in  contemplation of the Schemes of Arrangement and associated
transactions  contemplated  by this  Agreement  shall not  constitute a Material
Adverse Effect for purposes of this Agreement.

         (q) "Net Loss" means, with respect to any Person,  the estimated amount
of all losses and loss  adjustment  expenses  incurred or to be incurred by such
Person  and its  Subsidiaries  in  connection  with the  occurrence  of a single
natural catastrophe occurring between the date of the Original Agreement and the
Effective Time, net of all applicable  reinsurance  recoverables,  determined in
accordance with GAAP and generally accepted  actuarial  standards of practice as
applied  in  the  insurance  industry,   each  as  in  effect  on  the  date  of
determination  of such  Net  Loss.  Net  Loss  shall  be  determined  as soon as
reasonably  practicable following the occurrence of a natural catastrophe by the
Settlement  Auditor.  In the event that there is more than one Person serving as
the  Settlement  Auditor,  Net Loss shall be determined by taking the average of
the Net Loss determinations established by each Settlement Auditor.



                                        4

<PAGE>




         (r)      "NYSE" means The New York Stock Exchange, Inc.

         (s)  "Permitted  Liens"  means,  with  respect to  Trenwick  or LaSalle
Holdings  (as the case may be),  (i)  Liens for  Taxes or other  assessments  or
charges of  Governmental  Authorities  that are not yet  delinquent  or that are
being  contested in good faith by appropriate  proceedings,  in each case,  with
respect to which  adequate  reserves or other  appropriate  provisions are being
maintained to the extent required by GAAP; (ii) statutory Liens of landlords and
mortgagees  of  landlords  and  Liens  of  carriers,  warehousemen,   mechanics,
materialmen and other Liens imposed by law and created in the ordinary course of
business  for amounts  not yet more than  thirty (30) days  overdue or which are
being  contested in good faith by appropriate  proceedings,  in each case,  with
respect to which  adequate  reserves or other  appropriate  provisions are being
maintained to the extent required by GAAP; (iii) leases or subleases, easements,
rights-of-way,  covenants,  consents and Liens which do not interfere materially
with the ordinary  conduct of the  business of Trenwick or LaSalle  Holdings (as
the case may be) and their respective Subsidiaries, taken as a whole, or detract
materially  from the value of the  property to which they  attach or  materially
impair  the use  thereof  to such  party and its  Subsidiaries;  and (iv)  Liens
granted by  Trenwick  or LaSalle  Holdings  (as the case may be) or any of their
respective Subsidiaries to lenders pursuant to credit agreements in existence on
the date of the Original Agreement.

         (t)  "Person"  means  any  individual,  company,  corporation,  estate,
limited liability company, partnership,  joint venture, association, joint stock
company,  trust,  unincorporated  organization  or  government  or any agency or
political subdivision thereof or other entity.

         (u) "SEC" means the United States Securities and Exchange Commission.

         (v) "Securities Act" means the United States Securities Act of 1933, as
amended.

         (w) "Settlement Auditor" means either Ernst & Young LLP or Paragon Risk
Management  Services,  Inc., as shall be mutually agreed by LaSalle Holdings and
Trenwick.  In the event LaSalle Holdings and Trenwick are unable to agree upon a
Settlement Auditor within 30 calendar days following the completion of a natural
catastrophe,  both Ernst & Young LLP and Paragon Risk Management Services,  Inc.
shall serve as the Settlement Auditor.

         (x)  "Subsidiary"  means,  with  respect to a  specified  Person,  each
company,  partnership  or other  entity in which the  specified  Person  owns or
controls,  directly  or  indirectly  through one or more  intermediaries,  fifty
percent (50%) or more of the shares or other  interests  having  general  voting
power in the election of directors or Persons  performing  similar  functions or
rights to fifty percent (50%) or more of any distributions.

         (y) "Tax" or "Taxes" means any Bermuda or United States federal, state,
local,  foreign or other income,  share capital,  employees' income withholding,
foreign Person  withholding,  social security,  unemployment,  disability,  real
property, personal property, sales, use, transfer  or other tax,  including  any



                                        5

<PAGE>



interest,  penalties  or other  additions  to tax in respect  to the  foregoing,
whether disputed or not.

         (z) "Trenwick Disclosure Letter" means the letter, dated as of the date
of the Original  Agreement,  from Trenwick to LaSalle Holdings regarding certain
matters related to this Agreement.

         (aa)  "Trenwick Fair Market Value" means the product of (i) the average
of the  closing  sale  price  as  reported  on the NYSE  Composite  Tape for the
Trenwick  Shares for the thirty (30)  trading  days  immediately  preceding  the
Effective Date multiplied by (ii) the number of issued and outstanding  Trenwick
Shares on the Effective Date.


                                    ARTICLE 2

                                    THE PLANS

         Section 2.1.      The Plans.

         (a)  The Schemes of  Arrangement.  At the  Effective  Time (as  defined
herein),  and upon the terms and subject to the conditions hereof and subject to
the  Supreme  Court of the  Islands  of Bermuda  (the  "Court")  exercising  its
discretion and sanctioning the Schemes of Arrangement  pursuant to Section 99(2)
of The Companies Act, 1981 of Bermuda,  as amended (the  "Companies  Act"),  and
making such  facilitating  orders as are appropriate  pursuant to Section 101 of
the Companies Act, all of the issued and outstanding LaSalle Holdings Shares and
all of the issued and  outstanding  Minority  Shares shall be transferred to New
Holdings,  and holders of LaSalle  Holdings  Shares and  Minority  Shares  shall
become  holders of common  shares of New  Holdings  ("New  Holdings  Shares") in
accordance with the terms of this Agreement.

         (b)  The Plan of Reorganization.  At the Effective Time, upon the terms
and subject to the  conditions  hereof,  New Holdings  shall  acquire all of the
assets of and shall  assume all of the  liabilities  of  Trenwick,  pursuant  to
Section 271 of the GCL,  in  exchange  for New  Holdings  Shares  which shall be
distributed  to the  holders  of  Trenwick  Shares in  complete  liquidation  of
Trenwick  pursuant  to Section  275 of the GCL,  in a  transaction  intended  to
qualify as a tax-free reorganization under Section 368(a) of the Code.

         Section 2.2.      Application  to  the  Court;  Shareholder   Meetings;
Effective Time of the Plans; Closing.

         (a) As soon as practicable after the date hereof,  LaSalle Holdings and
LaSalle Re, acting through their respective  Boards of Directors,  in accordance
with applicable law shall:




                                        6

<PAGE>



                  (i) cause an application to be made to the Court,  pursuant to
                  Section 99(1) of the Companies  Act,  requesting  the Court to
                  summon such class meetings of members of LaSalle  Holdings and
                  LaSalle Re as the Court may direct;

                  (ii) give notice of,  convene and hold such class meetings for
                  the  purpose of  obtaining  such  approvals  of the Schemes of
                  Arrangement  as may be  required  under  Section  99(2) of the
                  Companies Act; and

                  (iii)  subject  to  such  approvals  being  obtained,  cause a
                  petition to be presented to the Court seeking the  sanctioning
                  of the  Schemes of  Arrangement  pursuant to Section 99 of the
                  Companies Act and file such other documents as are required to
                  be duly  filed  with  the  Court  to  effect  the  Schemes  of
                  Arrangement.

         (b) As soon as  practicable  after the date  hereof,  Trenwick,  acting
through its Board of Directors,  in accordance  with  applicable  law shall duly
call,  give  notice of,  convene  and hold an annual or  special  meeting of its
stockholders  for the purpose of obtaining  their approval of this Agreement and
the Plan of Reorganization.

         (c) Upon  receipt of orders from the Court  sanctioning  the Schemes of
Arrangement, upon approval by the stockholders of Trenwick of this Agreement and
the Plan of Reorganization and upon the terms and subject to the satisfaction or
waiver,  if permissible,  of the conditions  hereof,  the orders sanctioning the
Schemes of  Arrangement  shall be duly filed with the  Registrar of Companies of
Bermuda (the  "Registrar").  The Schemes of Arrangement  shall become  effective
upon the  filing of the orders of the  Court  with  respect  to the  Schemes  of
Arrangement  with the  Registrar  (the time of such filing being the  "Effective
Time" and the date of such  filing  being  the  "Effective  Date").  The Plan of
Reorganization  shall become effective at the Effective Time.  Immediately prior
to such  filings,  a closing (the  "Closing")  shall be held at such time as the
last condition set forth hereunder shall be fulfilled or waived, at the New York
office of Mayer, Brown & Platt, 1675 Broadway, New York, New York 10019-5820, at
9:00 a.m. or such other place and/or time as the parties  shall  agree,  for the
purpose of confirming the  satisfaction or waiver of the conditions set forth in
Article 5. The date upon which the Closing  shall occur is referred to herein as
the "Closing Date."

         Section 2.3.      Effects of the Plans.

         (a) Effect of the Schemes of  Arrangement.  As of the  Effective  Time,
LaSalle Holdings shall be a wholly-owned  Subsidiary of New Holdings and LaSalle
Re shall be, directly and indirectly  through LaSalle  Holdings,  a wholly-owned
Subsidiary of New Holdings,  and holders of LaSalle Holdings Shares and Minority
Shares  shall only have the right to receive  the LaSalle  Consideration  as set
forth in Section 2.6(c).

         (b) Effect of the Plan of  Reorganization.  As of the  Effective  Time,
Trenwick  shall  have  transferred  all of its  assets to New  Holdings  and New
Holdings shall have assumed all the liabilities of  Trenwick  and the holders of



                                        7

<PAGE>



Trenwick Shares shall only have the right to receive the Trenwick  Consideration
as set forth in Section 2.7(b).

         Section 2.4.      Governing Documents.

         (a)      New Holdings.

                  (i) At or prior to the Closing,  the memorandum of association
                  of New Holdings shall be in the form set forth in Exhibit B(i)
                  attached hereto.

                  (ii) At or prior to the Closing,  the bye-laws of New Holdings
                  shall be in the  form set  forth  in  Exhibit  B(ii)  attached
                  hereto.

         (b)      LaSalle Holdings.

                  (i) The  memorandum  of  association  of LaSalle  Holdings  in
                  effect  at  the  Effective  Time  shall  continue  to  be  the
                  memorandum of association of LaSalle Holdings until thereafter
                  amended or restated as provided therein and by law.

                  (ii)  The  bye-laws  of  LaSalle  Holdings  in  effect  at the
                  Effective  Time,  shall continue to be the bye-laws of LaSalle
                  Holdings  until  thereafter  amended or  restated  as provided
                  therein and by law.

         (c)      LaSalle Re.

                  (i) The  memorandum of  association of LaSalle Re in effect at
                  the  Effective  Time shall  continue to be the  memorandum  of
                  association of LaSalle Re until thereafter amended or restated
                  as provided therein and by law.

                  (ii) The  bye-laws  of LaSalle  Re in effect at the  Effective
                  Time shall  continue  to be the  bye-laws  of LaSalle Re until
                  thereafter amended or restated as provided therein and by law.

         Section 2.5.      Board of Directors of New  Holdings.  The parties
hereto  shall  procure  that at or prior to the  Closing,  the  directors of New
Holdings shall be the individuals designated in Exhibit C attached hereto, which
such directors shall constitute the entire Board of Directors of New Holdings at
such  time,  each of such  directors  to hold  office  in  accordance  with  the
applicable provisions of the bye-laws of New Holdings and until their successors
shall be elected or appointed and shall duly qualify.

         Section 2.6.      Terms of  the  Schemes  of  Arrangement: Exchange  of
Securities.  Subject to Section 2.6(e),  at the Effective Time, by virtue of the
Schemes of Arrangement  and without any action on the part of LaSalle  Holdings,
LaSalle Re or the holder of any of the following securities:




                                        8

<PAGE>




         (a) Subject to Section 2.6(c) and Section 2.12,  each LaSalle  Holdings
Share and each Minority Share that is issued and outstanding  immediately  prior
to the Effective  Time shall be  transferred  to New Holdings and there shall be
allotted  and  issued  to the  holder  thereof  such  number  of fully  paid and
nonassessable  New Holdings Shares as is equal to the LaSalle Exchange Ratio, as
defined below (the "LaSalle Consideration").  The "LaSalle Exchange Ratio" means
the product of (i) 1.0  multiplied  by (ii) the quotient of (A) the LaSalle Fair
Market  Value  minus  50% of the  amount by which  any Net Loss  experienced  by
LaSalle  Holdings  exceeds  $40,000,000 and is less than or equal to $60,000,000
and  minus  100% of the  amount  by which any Net Loss  experienced  by  LaSalle
Holdings exceeds $60,000,000 and is less than or equal to $100,000,000,  divided
by (B) the LaSalle Fair Market Value.  New Holdings shall issue the New Holdings
Shares to be received as LaSalle  Consideration and register the Persons to whom
New  Holdings  Shares are  issued on New  Holdings'  register  of  members.  The
Non-Voting  Shares held by LaSalle Holdings shall not be affected by the Schemes
of Arrangement.

         (b) Each LaSalle  Holdings  Option (as defined herein) and each LaSalle
Re Option (as defined  herein)  outstanding  as of the  Effective  Time shall be
treated in accordance with the provisions of Section 5.9.

         (c)  Each  LaSalle  Holdings  Share  that  is  issued  and  outstanding
immediately  prior to the  Effective  Time  that is owned by  LaSalle  Holdings,
LaSalle Re, Trenwick,  New Holdings or any Subsidiary of either of the foregoing
shall be  automatically  cancelled and retired and shall cease to exist,  and no
cash or other  consideration  shall be  delivered  or  deliverable  in  exchange
therefor.

         (d) Each  Series A  Preferred  Share of LaSalle  Holdings or LaSalle Re
that is issued and  outstanding  immediately  prior to the Effective  Time shall
remain  unchanged as a Series A Preferred  Share of LaSalle  Holdings or LaSalle
Re, as the case may be.

         (e) In the  event  that this  Agreement  and the  LaSalle  Re Scheme of
Arrangement are not approved by the vote specified in Section 4.15(b),  then the
LaSalle Re Scheme of  Arrangement  shall not be effected and the  provisions  of
Section 5.9(c) shall not apply.

         Section 2.7.      Terms  of  the  Plan of  Reorganization:  Issuance of
Securities.  At the Effective Time, by virtue of the Plan of Reorganization  and
without any action on the part of Trenwick or the holder of any of the following
securities:

         (a) Subject to Section 2.7(c) and Section 2.12, there shall be allotted
and  issued  to each  holder  of  Trenwick  Shares  a number  of fully  paid and
nonassessable New Holdings Shares as is equal to the Trenwick Exchange Ratio, as
defined below (the  "Trenwick  Consideration").  The "Trenwick  Exchange  Ratio"
means the product of (i) 1.0 multiplied by (ii) the quotient of (A) the Trenwick
Fair Market Value minus 50% of the amount by which any Net Loss  experienced  by
Trenwick exceeds  $40,000,000 and is less than or equal to $60,000,000 and minus
100% of the  amount  by  which  any Net Loss  experienced  by  Trenwick  exceeds
$60,000,000  and  is  less than  or  equal to  $100,000,000, divided  by (B) the



                                        9

<PAGE>



Trenwick Fair Market  Value.  If prior to the  Effective  Time either  Trenwick,
LaSalle Holdings or LaSalle Re should split or combine the Trenwick Shares,  the
LaSalle Re Shares or the Minority Shares, as applicable, pay a stock dividend or
otherwise  change the  Trenwick  Shares,  the LaSalle Re Shares or the  Minority
Shares, as applicable,  into any other securities, or make any other dividend or
distribution  on the  Trenwick  Shares,  the  LaSalle Re Shares or the  Minority
Shares,  as applicable,  then the Trenwick  Exchange Ratio will be appropriately
adjusted to reflect such split,  combination,  dividend or other distribution or
changes.  New  Holdings  shall issue the New  Holdings  Shares to be received as
Trenwick Consideration and register the Persons to whom such New Holdings Shares
are issued in New Holdings' register of members.

         (b) Each  Trenwick  Option (as defined  herein)  outstanding  as of the
Effective  Time shall be treated in  accordance  with the  provisions of Section
5.9.

         (c) Each  Trenwick  Share  that is issued and  outstanding  immediately
prior to the  Effective  Time that is owned by  LaSalle  Holdings,  LaSalle  Re,
Trenwick,  New Holdings or any Subsidiary of any of the foregoing (together,  in
each case,  with the  associated  Right (as defined in Section  3.3(a)) shall be
automatically  cancelled  and retired  and shall cease to exist,  and no cash or
other consideration shall be delivered or deliverable in exchange therefor.

         Section 2.8.      Terms of the Schemes of Arrangement: Surrender and
                           Payment.

         (a) Promptly  after the Effective  Time, New Holdings shall (i) appoint
an  agent  (the  "LaSalle   Exchange  Agent")  for  the  purpose  of  exchanging
certificates  representing  LaSalle  Holdings Shares and Minority Shares for New
Holdings  Shares  pursuant  to Section  2.6(a),  (ii)  deposit  with the LaSalle
Exchange Agent certificates  representing the aggregate LaSalle Consideration to
be paid in respect  of the  LaSalle  Holdings  Shares  and the  Minority  Shares
(together with any dividends or  distributions  with respect  thereto) and (iii)
send,  or cause the LaSalle  Exchange  Agent to send,  to each holder of LaSalle
Holdings  Shares and each  holder of  Minority  Shares at the  Effective  Time a
letter of  transmittal  for use in such  exchange  (which shall specify that the
delivery  shall be  effected,  and risk of loss and title shall pass,  only upon
proper  delivery of the  certificates  representing  LaSalle  Holdings Shares or
Minority Shares (as applicable) to the LaSalle Exchange Agent).

         (b) Each holder of LaSalle Holdings Shares or Minority Shares that have
been  transferred to New Holdings  pursuant to the Schemes of Arrangement,  upon
surrender  to the  LaSalle  Exchange  Agent  of a  certificate  or  certificates
representing  such  shares,   together  with  a  properly  completed  letter  of
transmittal  covering  such  shares,  shall be  entitled  to receive the LaSalle
Consideration payable in respect of such shares. Until so surrendered, each such
certificate shall, after the Effective Time, represent for all purposes only the
right to receive such LaSalle Consideration.

         (c) If any  portion  of the  LaSalle  Consideration  is to be paid to a
Person  other  than the  registered  holder of the  LaSalle  Holdings  Shares or
Minority Shares (as  applicable)  represented by the certificate or certificates
surrendered in exchange  therefor,  it shall be a condition to such payment that
the  certificate or certificates  so surrendered  shall be properly  endorsed or
otherwise be in proper form for transfer  and that the  Person  requesting  such


                                       10

<PAGE>


payment  shall pay to the  LaSalle  Exchange  Agent any  transfer or other Taxes
required  as a result of such  payment  to a Person  other  than the  registered
holder of such shares or establish to the  satisfaction of the LaSalle  Exchange
Agent that such Tax has been paid or is not payable.

         (d) After the Effective Time,  there shall be no further  registrations
of  transfers  of LaSalle  Holdings  Shares or  Minority  Shares  other than the
registration  of LaSalle  Holdings Shares and Minority Shares in the name of New
Holdings pursuant to Section 2.6(a). If, after the Effective Time,  certificates
representing LaSalle Holdings Shares or Minority Shares are presented to LaSalle
Holdings or, subject to the provisions of Section 2.8(e),  the LaSalle  Exchange
Agent,  they shall be cancelled and exchanged for the LaSalle  Consideration  in
accordance with the procedures set forth in this Section 2.8.

         (e)  Any  portion  of the  LaSalle  Consideration  (together  with  any
dividends or distributions  with respect to the New Holdings  Shares)  deposited
with the LaSalle  Exchange Agent pursuant to Section 2.8(a) and any cash payment
for a  fractional  New Holdings  Share  pursuant to Section  2.12,  that remains
unclaimed by the holders of LaSalle  Holdings  Shares or the holders of Minority
Shares twelve months after the Effective  Time shall be returned to New Holdings
or an Affiliate designated by New Holdings, upon demand, and any such holder who
has not exchanged his LaSalle Holdings Shares or Minority Shares for the LaSalle
Consideration  in  accordance  with this  Section  2.8 prior to that time  shall
thereafter  look only to New Holdings for his claim for New Holdings  Shares and
any   dividends  or   distributions   with  respect  to  New  Holdings   Shares.
Notwithstanding the foregoing, New Holdings shall not be liable to any holder of
LaSalle  Holdings Shares or any holder of Minority Shares for any amount paid to
a public official pursuant to applicable abandoned property laws.

         (f) No  dividends  or  other  distributions  with  respect  to the  New
Holdings Shares constituting part of the LaSalle  Consideration shall be paid to
the  holder of any  unsurrendered  certificates  representing  LaSalle  Holdings
Shares or Minority Shares until such certificates are surrendered as provided in
this Section 2.8. Upon such surrender, there shall be paid, without interest, to
the Person in whose name the  certificates  representing the New Holdings Shares
received in exchange for such  LaSalle  Holdings  Shares or Minority  Shares (as
applicable) are registered, (i) all dividends and other distributions in respect
of New Holdings  Shares that are payable on a date subsequent to, and the record
date for which occurs after,  the Effective Time and (ii) all dividends or other
distributions  in respect  of LaSalle  Holdings  Shares or  Minority  Shares (as
applicable)  that are payable on a date  subsequent  to, and the record date for
which occurs on or before, the Effective Time.

         (g) At and after the Effective  Time,  each holder of a certificate  or
certificates that represented issued and outstanding  LaSalle Holdings Shares or
Minority Shares  immediately prior to the Effective Time shall cease to have any
rights as a  shareholder  of LaSalle  Holdings  or  LaSalle Re (as  applicable),
except for the right to surrender its  certificate or  certificates  in exchange
for the LaSalle Consideration as provided in this Section 2.8.



                                       11

<PAGE>




         Section 2.9.      Terms of the Plan of Reorganization: Surrender and
                           Payment.

         (a) Promptly  after the Effective  Time, New Holdings shall (i) appoint
an  agent  (the  "Trenwick  Exchange  Agent")  for  the  purpose  of  exchanging
certificates  representing  Trenwick  Shares for New Holdings Shares pursuant to
Section  2.7,  (ii)  deposit  with  the  Trenwick  Exchange  Agent  certificates
representing the aggregate Trenwick Consideration to be paid in exchange for the
Trenwick  Shares  (together  with any  dividends or  distributions  with respect
thereto) and (iii) send, or cause the Trenwick  Exchange  Agent to send, to each
holder of Trenwick  Shares at the Effective Time a letter of transmittal for use
in such exchange  (which shall specify that the delivery shall be effected,  and
risk of loss and title shall pass, only upon proper delivery of the certificates
representing Trenwick Shares to the Trenwick Exchange Agent).

         (b) Each  holder of  Trenwick  Shares that has the right to receive the
Trenwick Consideration pursuant to the Plan of Reorganization, upon surrender to
the Trenwick  Exchange Agent of a certificate or certificates  representing such
Trenwick  Shares,  together  with a  properly  completed  letter of  transmittal
covering  such  Trenwick  Shares,  shall be  entitled  to receive  the  Trenwick
Consideration  payable in respect of such Trenwick Shares. Until so surrendered,
each  such  certificate  shall,  after the  Effective  Time,  represent  for all
purposes only the right to receive such Trenwick Consideration.

         (c) If any  portion of the  Trenwick  Consideration  is to be paid to a
Person other than the registered  holder of the Trenwick  Shares  represented by
the certificate or certificates  surrendered in exchange therefor, it shall be a
condition to such payment that the  certificate or  certificates  so surrendered
shall be properly  endorsed or otherwise be in proper form for transfer and that
the Person  requesting such payment shall pay to the Trenwick Exchange Agent any
transfer or other Taxes  required as a result of such  payment to a Person other
than  the  registered  holder  of  such  Trenwick  Shares  or  establish  to the
satisfaction  of the Trenwick  Exchange  Agent that such Tax has been paid or is
not payable.

         (d) After the Effective Time,  there shall be no further  registrations
of transfers of Trenwick  Shares.  If, after the  Effective  Time,  certificates
representing  Trenwick  Shares are  presented  to  Trenwick  or,  subject to the
provisions  of  Section  2.9(e),  the  Trenwick  Exchange  Agent,  they shall be
cancelled and exchanged for the Trenwick  Consideration  in accordance  with the
procedures set forth in this Section 2.9.

         (e) Any  portion  of the  Trenwick  Consideration  (together  with  any
dividends or distributions  with respect to the New Holdings  Shares)  deposited
with the  Trenwick  Exchange  Agent  pursuant  to Section  2.9(a),  and any cash
payment for a  fractional  New Holdings  Share  pursuant to Section  2.12,  that
remains  unclaimed  by the holders of Trenwick  Shares  twelve  months after the
Effective  Time shall be returned to New Holdings or an Affiliate  designated by
New  Holdings,  upon  demand,  and any such  holder  who has not  exchanged  his
Trenwick Shares for the Trenwick  Consideration  in accordance with this Section
2.9 prior to that time shall thereafter look only to New Holdings for his  claim



                                       12

<PAGE>



for New Holdings Shares,  any cash in lieu of fractional New Holdings Shares and
any   dividends  or   distributions   with  respect  to  New  Holdings   Shares.
Notwithstanding the foregoing, New Holdings shall not be liable to any holder of
Trenwick Shares for any amount paid to a public official  pursuant to applicable
abandoned property laws.

         (f) No  dividends  or  other  distributions  with  respect  to the  New
Holdings Shares constituting part of the Trenwick Consideration shall be paid to
the holder of any unsurrendered  certificates representing Trenwick Shares until
such  certificates  are  surrendered  as provided in this Section 2.9. Upon such
surrender,  there shall be paid,  without interest,  to the Person in whose name
the  certificates  representing the New Holdings Shares allotted in exchange for
such Trenwick Shares are registered,  (i) all dividends and other  distributions
in respect of New Holdings  Shares that are payable on a date subsequent to, and
the  record  date  for  which  occurs  after,  the  Effective  Time and (ii) all
dividends or other  distributions in respect of Trenwick Shares that are payable
on a date subsequent to, and the record date for which occurs on or before,  the
Effective Time.

         (g) At and after the Effective  Time,  each holder of a certificate  or
certificates that represented issued and outstanding Trenwick Shares immediately
prior to the Effective  Time shall cease to have any rights as a stockholder  of
Trenwick,  except for the right to surrender its  certificate or certificates in
exchange for the Trenwick Consideration as provided in this Section 2.9.

         Section  2.10.    Voting.  In determining shareholders  of New Holdings
entitled to notice of and to vote at meetings of  shareholders  of New Holdings,
former shareholders of record of LaSalle Holdings, LaSalle Re and Trenwick shall
not be deemed  shareholders  of record  until the  register  of  members  of New
Holdings  is amended  to reflect  the  allotment  and issue of the New  Holdings
Shares to such former shareholders.

         Section  2.11.    Lost  Certificates.  If  any certificate representing
Trenwick Shares,  LaSalle  Holdings Shares or Non-Voting  Shares shall have been
lost,  stolen or destroyed,  upon the making of an affidavit of that fact by the
Person  claiming  such  certificate  to be lost,  stolen or  destroyed  and,  if
required  by New  Holdings,  the  posting  by  such  Person  of a bond  in  such
reasonable  amount as the New Holdings may direct as indemnity against any claim
that may be made  against it with  respect  to such  certificate,  the  Trenwick
Exchange Agent or LaSalle  Exchange  Agent,  as the case may be, will deliver in
exchange  for  such  lost,   stolen  or  destroyed   certificate   the  Trenwick
Consideration or LaSalle Consideration,  as the case may be, with respect to the
Trenwick  Shares,   LaSalle  Holdings  Shares  or  Non-Voting   Shares  formerly
represented thereby, without any interest thereon.

         Section  2.12.    No  Fractional   Shares.   No  certificates  or scrip
representing  fractional  New  Holdings  Shares  shall be issued in exchange for
Trenwick  Shares,  LaSalle  Holding  Shares,  or NonVoting  Shares,  but in lieu
thereof each holder otherwise entitled to a fractional New Holdings Share (after
taking into account all Trenwick  Shares,  LaSalle Holdings Shares or Non-Voting
Shares, as applicable,  owned by such holder) shall be entitled to receive, from
the Trenwick  Exchange Agent or the LaSalle  Exchange Agent,  as applicable,  in
accordance  with the  provisions of this Section 2.12, a cash payment in lieu of
such  fractional  New  Holdings Share representing  the  value of such fraction,


                                       13

<PAGE>



which for this purpose shall be calculated by (i)  multiplying  such fraction by
the product of the Average Closing Price and the Trenwick  Exchange Ratio in the
case of Trenwick Shares and (ii) multiplying such fraction by the product of the
Average  Closing  Price and the  LaSalle  Exchange  Ratio in the case of LaSalle
Holdings  Shares  and  Non-Voting  Shares.  As soon  as  practicable  after  the
determination  of the amount of cash,  if any, to be paid to holders of Trenwick
Shares, LaSalle Holdings Shares, or Non-Voting Shares, as applicable, in lieu of
any fractional New Holdings  Share,  the Trenwick  Exchange Agent or the LaSalle
Exchange  Agent,  as  applicable,  shall  promptly  pay without  interest to all
holders of Trenwick Shares,  LaSalle Holdings Shares,  or Non-Voting  Shares, as
applicable, entitled thereto all such amounts. Holders of interests representing
fractional  New Holdings  Shares shall not be entitled to vote such interests or
to any other rights as a shareholder of New Holdings.


                                    ARTICLE 3

                   REPRESENTATIONS AND WARRANTIES OF TRENWICK

         Trenwick hereby  represents and warrants to LaSalle Holdings that as of
the date of the Original  Agreement  (except to the extent that a representation
or warranty speaks as of an earlier date),  with references to "the date hereof"
or the "date of this  Agreement" in this Article 3 being deemed to be references
to the date of the Original Agreement:

         Section 3.1.      Corporation; Organization.

         (a) Except as set forth in Section  3.1(a) of the  Trenwick  Disclosure
Letter,  each of Trenwick and its  Subsidiaries is a company duly  incorporated,
validly  existing  and in good  standing  (with  respect to  jurisdictions  that
recognize such concept) under the laws of the jurisdiction of its incorporation.
Each of Trenwick and its Subsidiaries (i) is qualified, licensed or domesticated
as a foreign corporation in all jurisdictions where such qualification,  license
or  domestication  is required to own and operate its properties and conduct its
business  in the manner and at the places  presently  conducted;  (ii) holds all
franchises, grants, licenses, certificates, permits, consents and orders, all of
which are valid and in full force and  effect,  from all  applicable  regulatory
authorities  necessary  to own and  operate  its  properties  and to conduct its
business in the manner and at the places presently conducted; and (iii) has full
power and  authority  (corporate  and  other)  to own,  lease  and  operate  its
respective  properties  and assets  and to carry on its  business  as  presently
conducted  and as proposed to be  conducted,  except  where the failure to be so
qualified,  licensed  or  domesticated  or  to  hold  such  franchises,  grants,
licenses,  certificates,  permits, consents and orders or to have such power and
authority  would  not,  when  taken  together  with  all  other  such  failures,
reasonably be expected to have a Material  Adverse Effect on Trenwick.  Trenwick
has furnished to LaSalle Holdings complete and correct copies of its certificate
of incorporation  and by-laws as in effect on the date hereof.  Such certificate
of  incorporation  and  by-laws  are in  full  force  and  effect  and no  other
constitutional documents are applicable to or binding upon Trenwick.



                                       14

<PAGE>



         (b) Trenwick conducts its insurance and reinsurance  operations through
the Subsidiaries set forth in Section 3.1(b) of the Trenwick  Disclosure  Letter
(collectively,  the  "Trenwick  Insurance  Subsidiaries").  Each of the Trenwick
Insurance  Subsidiaries  is (i) duly  licensed  or  authorized  as an  insurance
company or (as applicable) a reinsurer in its  jurisdiction of  incorporation or
duly  licensed  to  operate  in  the  insurance  or  reinsurance   business  (as
applicable)  in  its  jurisdiction  of  incorporation,  (ii)  duly  licensed  or
authorized as an insurance company and (as applicable) a reinsurer in each other
jurisdiction  where it is  required  to be so  licensed  or  authorized  or duly
licensed to operate in the insurance or reinsurance  business (as applicable) in
each other  jurisdiction  where it is required to be so licensed  and (iii) duly
authorized  in its  jurisdiction  of  incorporation  and each  other  applicable
jurisdiction to write each line of business  currently  written by such Trenwick
Insurance  Subsidiaries,  except,  in any such case,  where the failure to be so
licensed or authorized is not reasonably  expected to have,  individually  or in
the aggregate,  a Material  Adverse  Effect on Trenwick.  Except as set forth in
Section 3.1(b) of the Trenwick Disclosure Letter, Trenwick has made all required
filings under  applicable  insurance  holding company  statutes except where the
failure to file is not reasonably  expected to have a Material Adverse Effect on
Trenwick.

         Section 3.2.      Authority; Approval and Fairness.

         (a) Trenwick has all requisite corporate power and authority to execute
and deliver this Agreement and, subject to the due approval and adoption of this
Agreement  by  its  stockholders,  to  perform  its  obligations  hereunder  and
consummate  the  transactions  contemplated  hereby.  Trenwick has all requisite
corporate  power and authority to enter into the Stock Option  Agreements and to
consummate the transactions  contemplated thereby. The execution and delivery of
this  Agreement  by Trenwick,  the  performance  by Trenwick of its  obligations
hereunder  and the  consummation  by Trenwick of the  transactions  contemplated
hereby have been duly authorized by all necessary  corporate  action on the part
of Trenwick,  subject only to compliance with the provisions of Sections 271 and
275 of the GCL.  No other  corporate  proceedings  on the part of  Trenwick  are
necessary  for the  execution  and delivery of this  Agreement by Trenwick  and,
subject to  compliance  with the  provisions of Sections 271 and 275 of the GCL,
the performance by Trenwick of its obligations hereunder and the consummation by
Trenwick of the transactions  contemplated  hereby. This Agreement and the Stock
Option  Agreements  have  been duly  executed  and  delivered  by  Trenwick  and
(assuming the due  authorization,  execution and delivery of this  Agreement and
the Stock Option  Agreements by LaSalle  Holdings,  LaSalle Re),  subject to the
provisions  of  Sections  271 and 275 of the GCL,  constitute  legal,  valid and
binding obligations of Trenwick,  enforceable against Trenwick in accordance its
terms,  subject  with  respect to  enforceability  to the effect of  bankruptcy,
fraudulent conveyance,  insolvency,  reorganization,  moratorium or similar laws
now or hereafter affecting the enforcement of creditors' rights generally and to
the availability of equitable remedies.

         (b) The Board of Directors of Trenwick (the  "Trenwick  Board") (i) has
unanimously  (by all  directors  present  at a  meeting  duly  called  and held)
declared that it considers this Agreement,  the Plan of  Reorganization  and the
other transactions contemplated hereby to be advisable and in the best interests



                                       15

<PAGE>



of Trenwick and its  stockholders,  and (ii) has  authorized and approved in all
respects  this  Agreement,  the Plans and the  other  transactions  contemplated
hereby.

         Section 3.3.      Capital Structure.

         (a) As of the date hereof,  the  authorized  capital  stock of Trenwick
consists  of  30,000,000  shares of common  stock  with a par value of $0.10 per
share and  2,000,000  shares of  preferred  stock  with a par value of $0.10 per
share.  As of December  15,  1999,  (i)  17,388,981  shares of common stock were
issued and  outstanding,  (ii) no shares of common  stock were held as  treasury
shares or by  Subsidiaries  of Trenwick,  (iv) 200,000 shares of Series B Junior
Participating  Preferred  Stock were  reserved for issuance upon exercise of the
rights  (the  "Rights")  distributed  to the  holders of shares of common  stock
pursuant to the Rights  Agreement  dated as of  September  24, 1997 (the "Rights
Agreement"),  between  Trenwick and First  Chicago Trust Company of New York, as
Rights Agent,  and (v) no shares of preferred  stock were issued or outstanding.
Section  3.3(a)  of  the  Trenwick  Disclosure  Letter  sets  forth  each  plan,
arrangement or agreement pursuant to which options or stock appreciation  rights
with  respect to Trenwick  Shares may be granted or under which such  options or
stock  appreciation  rights have been granted and are outstanding (the "Trenwick
Option  Plans") and in the  aggregate  the  maximum  number of options and stock
appreciation  rights  outstanding as of the date hereof and the class and number
of Trenwick  Shares  reserved for issue  pursuant to the  Trenwick  Option Plans
(such options and rights being herein collectively  referred to as the "Trenwick
Options"),  together  with a listing of the  aggregate  number of such  Trenwick
Options  which  shall  vest at the  Effective  Time as a  result  of the Plan of
Reorganization.  Each  of the  outstanding  shares  of  capital  stock  of  each
Subsidiary  of Trenwick,  other than the 110,000  redeemable  preferred  capital
securities  (liquidation  amount $1,000 per security) issued by Trenwick Capital
Trust I, a Delaware  statutory  business trust ("Trenwick  Capital"),  and other
than as set  forth in  Section  3.3(a) of the  Trenwick  Disclosure  Letter,  is
directly or indirectly owned by Trenwick, free and clear of all Liens.

         (b) Except as  described in Section  3.3(b) of the Trenwick  Disclosure
Letter, no bonds,  debentures,  notes or other indebtedness  having the right to
vote (or  convertible  into or exercisable  for  securities  having the right to
vote) on any matters on which  stockholders may vote ("Voting Debt") of Trenwick
or any of its Subsidiaries are issued or outstanding.

         (c) Except as described in Sections 3.3(a),  (b) or (c) of the Trenwick
Disclosure Letter, there are no options, warrants, calls, rights, commitments or
agreements of any character to which  Trenwick or any of its  Subsidiaries  is a
party  or by  which  any of  them is  bound  obligating  Trenwick  or any of its
Subsidiaries  to issue,  deliver or sell,  or cause to be issued,  delivered  or
sold,  additional  shares of capital stock or any Voting Debt of Trenwick or any
of its Subsidiaries or obligating  Trenwick or any of its Subsidiaries to grant,
extend or enter  into any such  option,  warrant,  call,  right,  commitment  or
agreement.  Except as set forth in this  Agreement  or in Section  3.3(c) of the
Trenwick Disclosure Letter, there are no outstanding  contractual obligations of
Trenwick or any of its Subsidiaries to repurchase,  redeem or otherwise  acquire
any shares of capital stock of Trenwick or any of its Subsidiaries.



                                       16

<PAGE>




         (d) Except as  described in Section  3.3(d) of the Trenwick  Disclosure
Letter or as  specifically  described in this Agreement and except for quarterly
dividends  in an amount not in excess of $0.26 per share,  since  September  30,
1999,  Trenwick  has not (i) made or  agreed  to make any  share  split or share
dividend, or issued or permitted or agreed to permit to be issued any shares, or
securities  exercisable  for or  convertible  into shares,  of capital  stock of
Trenwick  other than  pursuant to and as  required by the terms of any  Trenwick
Option;  (ii) repurchased,  redeemed or otherwise acquired any shares of capital
stock  of  Trenwick;  or  (iii)  declared,  set  aside,  made  or  paid  to  the
stockholders  of Trenwick  dividends or other  distributions  on the outstanding
shares of capital stock of Trenwick.

         Section 3.4.      SEC Reports; Financial Statements.

         (a) Trenwick has delivered or made available to LaSalle Holdings a true
and  complete  copy  of  each  report,  schedule,   registration  statement  and
definitive proxy statement or information  statement  (including exhibits) filed
by Trenwick or Chartwell Re Corporation ("Chartwell") with the SEC in respect of
their  respective  fiscal  years  ending  December  31,  1997 and 1998 and their
respective  quarters ending after December 31, 1998 under the Securities Act and
the Exchange Act and will deliver to LaSalle  Holdings  promptly upon the filing
thereof with the SEC all such reports,  schedules,  registration  statements and
proxy statements  (including exhibits) as may be filed after the date hereof and
prior to the  Effective  Time (as such  documents  have  since the time of their
filing been amended,  including without limitation,  amendments reflected in the
Joint  Proxy  Statement/Prospectus  dated  September  7, 1999 or may after their
filing, if after the date hereof, be amended, the "Trenwick SEC Reports"), which
are or will be all the  documents  that Trenwick was or will be required to file
with the SEC.  Except as disclosed in Section 3.4(a) of the Trenwick  Disclosure
Letter,  as of their respective dates, the Trenwick SEC Reports complied or will
comply in all material  respects with the  requirements of the Securities Act or
the Exchange Act, as the case may be, and the rules and  regulations  of the SEC
thereunder  applicable to the Trenwick SEC Reports, and none of the Trenwick SEC
Reports  contained  or will contain any untrue  statement of a material  fact or
omitted or will omit to state a material fact  required to be stated  therein or
necessary to make the statements  therein,  in light of the circumstances  under
which they were made or will be made, not misleading.

         (b) As of their respective dates, the financial  statements of Trenwick
included or to be included in the Trenwick SEC Reports (the "Trenwick  Financial
Statements")  complied or will comply as to form in all material  respects  with
applicable accounting  requirements and with the published rules and regulations
of the SEC with respect  thereto,  and  presented or will present  fairly in all
material  respects  the  consolidated  financial  position of  Trenwick  and its
Subsidiaries   and  the   consolidated   results  of   operations,   changes  in
stockholders'  equity and cash flows of Trenwick and its  Subsidiaries as of the
dates and for the  periods  indicated,  in  accordance  with GAAP  applied  on a
consistent basis,  subject in the case of interim financial statements to normal
year-end  adjustments and except for the absence of certain footnote information
in the unaudited statements.




                                       17

<PAGE>



         (c)  Except as set forth in, or arising  out of facts or  circumstances
disclosed  in,  filings  by  Trenwick  with the SEC  prior  to the date  hereof,
Trenwick and its Subsidiaries have no liabilities,  debts, claims or obligations
of any nature on the date hereof, whether accrued, absolute, direct or indirect,
contingent or otherwise, whether due or to become due, that would be required to
be  included on a balance  sheet  prepared in  accordance  with GAAP  ("Trenwick
Liabilities"),  and there is no existing condition or set of circumstances which
would reasonably be expected to result in a Trenwick  Liability,  except for (i)
Trenwick  Liabilities  incurred in the ordinary and usual course of business and
consistent   with  past  practice  since   September  30,  1999,  (ii)  Trenwick
Liabilities  incurred  in  connection  with or as a result  of the  transactions
contemplated  by this  Agreement and (iii) Trenwick  Liabilities  that would not
reasonably be expected to have a Material Adverse Effect on Trenwick.

         Section 3.5.     Absence  of  Certain  Changes or  Events.   Except  in
connection with this Agreement,  the Plans, the Stock Option  Agreements and the
transactions  contemplated  hereby and thereby or except as described in Section
3.5 of the Trenwick  Disclosure Letter, as disclosed in the Trenwick SEC Reports
filed and publicly  available  prior to the date of this  Agreement  (the "Filed
Trenwick  SEC  Reports")  since the date of the most  recent  audited  financial
statements  included  in the  Filed  Trenwick  SEC  Reports,  Trenwick  and  its
Subsidiaries  have conducted  their business in the ordinary  course  consistent
with past  practice,  and there has not occurred (i) any event or change  having
individually or in the aggregate a Material Adverse Effect on Trenwick, (ii) any
declaration,  setting  aside or payment of any  dividend  or other  distribution
(whether  in  cash,  stock  or  property)  with  respect  to any  of  Trenwick's
outstanding  capital stock,  other than regular  quarterly cash dividends of not
more than $0.26 per share on the Trenwick  Shares and  dividends  paid by wholly
owned  subsidiaries,   (iii)  (A)  any  granting  by  Trenwick  or  any  of  its
Subsidiaries  to any  current or former  director  or officer of Trenwick or its
Subsidiaries of any increase in  compensation,  bonus or other benefits,  except
for normal  increases  in the ordinary  course of business,  (B) any granting by
Trenwick or any of its  Subsidiaries  to any such current or former  director or
officer of any  increase in  severance  or  termination  pay or (C) any entry by
Trenwick or any of its Subsidiaries  into, or any amendments of, any employment,
deferred  compensation,  consulting,  severance,  termination or indemnification
agreement  with any such  current or former  director or  officer,  (iv) any tax
election that  individually  or in the aggregate  would have a Material  Adverse
Effect on Trenwick or any of its tax  attributes or any settlement or compromise
of any material income tax liability,  or (v) any change in accounting  methods,
principles  or  practices  by  Trenwick  or any of its  Subsidiaries  materially
affecting their assets, liabilities or business, except insofar as may have been
required or permitted by a change in applicable accounting principles (including
statutory accounting practices ("SAP")).

         Section 3.6. Certain Fees. No finder,  broker, agent, financial advisor
or  other  intermediary  other  than DLJ has  acted on  behalf  of  Trenwick  in
connection with this Agreement or the transactions  contemplated  hereby,  or is
entitled to any payment in connection herewith. Trenwick has provided to LaSalle
Holdings copies of Trenwick's engagement letter with DLJ in connection with this
Agreement and the transactions contemplated hereby.




                                       18

<PAGE>



         Section 3.7.      No  Defaults.  Neither   Trenwick   no  any  of   its
Subsidiaries  is in default or violation  (and no event has occurred  which with
notice or lapse of time or both would  constitute a default or violation) of its
certificate of  incorporation  or by-laws or other  governing  document,  or any
material agreement,  mortgage,  indenture,  debenture,  trust, lease, license or
other  instrument or  obligation  to or by which it or any of its  properties is
subject or bound (the  "Trenwick  Instruments"),  except  for such  defaults  or
violations as would not reasonably be expected to have,  individually  or in the
aggregate, a Material Adverse Effect on Trenwick. Except as set forth in Section
3.7 of the Trenwick  Disclosure Letter, the execution,  delivery and performance
of this  Agreement  and the  taking of any  other  action  contemplated  by this
Agreement  will not (i) result in any  violation  of or be in  conflict  with or
constitute a breach or default (with or without notice or lapse of time or both)
under (a) the  certificate  of  incorporation  or  by-laws  of  Trenwick  or its
Subsidiaries or (b) any of the other Trenwick  Instruments,  except for any such
violation  of,  conflict  with,  breach  of or  default  under  which  would not
reasonably be expected to have,  individually  or in the  aggregate,  a Material
Adverse Effect on Trenwick,  (ii) result in or constitute an event entitling any
party to a Trenwick  Instrument to effect an acceleration of the maturity of any
indebtedness  of Trenwick or any of its  Subsidiaries or an increase in the rate
of interest  presently in effect with respect to such  indebtedness,  except for
any such  accelerations  or increases  which would not reasonably be expected to
have, individually or in the aggregate, a Material Adverse Effect on Trenwick or
(iii) result in the creation of any Lien upon any of the properties or assets of
Trenwick, except for Permitted Liens and any Liens which would not reasonably be
expected to have, individually or in the aggregate, a Material Adverse Effect on
Trenwick.


         Section 3.8.      Consents.

         (a)  Except  as set forth in  Section  3.8 of the  Trenwick  Disclosure
Letter and except for compliance  with the provisions of Sections 271 and 275 of
the  GCL  and  the  approval  of  Lloyd's,  no  consent,   approval,   order  or
authorization of, or registration,  qualification,  designation,  declaration or
filing with, any Governmental  Authority  ("Consent") is required on the part of
Trenwick or any of its  Subsidiaries in connection with the execution,  delivery
and  performance by Trenwick of this Agreement and the  consummation by Trenwick
of the transactions contemplated hereby, except those required by (i) compliance
with any applicable requirements of the Hart-Scott-Rodino Antitrust Improvements
Act of 1976, as amended (the "HSR Act"),  (ii) United  States  federal and state
securities  or "Blue Sky" laws and (iii) where  failure to obtain  such  Consent
would not be reasonably expected to have a Material Adverse Effect on Trenwick.

         (b) Other than the affirmative  vote of the holders of more than 50% of
the issued and outstanding  Trenwick Shares (with each share having one vote per
share)   required  to  approve  and  adopt  this   Agreement  and  the  Plan  of
Reorganization,  there is no other  vote,  consent or approval of the holders of
any class of shares of Trenwick  necessary to approve and adopt this  Agreement,
the Plan of Reorganization and the transactions contemplated hereby.

         Section 3.9.      Compliance with Applicable Law.  Each of Trenwick and
its  Subsidiaries  is  in  compliance  with  all  licenses,  permits  and  other
authorizations, domestic or foreign, necessary to conduct its respective



                                       19

<PAGE>



business, except where failure to have or comply with such licenses, permits and
authorizations would not reasonably be expected to have,  individually or in the
aggregate,  a Material  Adverse Effect on Trenwick.  Neither Trenwick nor any of
its  Subsidiaries  is in default or violation  (and no event has occurred  which
with  notice  or the  lapse  of time or  both  would  constitute  a  default  or
violation) of any judgment,  decree,  order, law, statute, rule or regulation of
any Governmental Authority,  except for such defaults or violations as would not
reasonably be expected to have,  individually  or in the  aggregate,  a Material
Adverse  Effect on Trenwick.  Subject to obtaining  the Consents  referred to in
Section  3.8,  the  execution,  delivery and  performance  of this  Agreement by
Trenwick  and the  consummation  by  Trenwick of the  transactions  contemplated
hereby prior to the date or dates as of which the representations and warranties
herein are made or deemed  made,  will not result in any default or violation of
any  judgment,   decree,   order,  law,  statute,  rule  or  regulation  of  any
Governmental  Authority  applicable to Trenwick or its Subsidiaries,  except for
such  defaults  or  violations  as would not  reasonably  be  expected  to have,
individually or in the aggregate, a Material Adverse Effect on Trenwick.

         Section 3.10.     Information  Supplied.   None  of   the   information
supplied or to be  supplied  by  Trenwick  for  inclusion  or  incorporation  by
reference in the Registration Statement on Form S-4 (the "Form S-4") to be filed
with the SEC by New  Holdings  relating to the New  Holdings  Shares  comprising
LaSalle Consideration and Trenwick  Consideration will, at the time the Form S-4
is filed with the SEC, at any time it is amended or  supplemented or at the time
it becomes effective under the Securities Act, contain any untrue statement of a
material fact or omit to state any material  fact required to be stated  therein
or necessary to make the statements therein, in light of the circumstances under
which such statements were made, not  misleading.  The letters to  shareholders,
notices of meetings,  proxy statements and forms of proxies to be distributed to
shareholders of LaSalle Holdings and stockholders of Trenwick,  respectively, in
connection  with the  Plans and the  transactions  contemplated  hereby,  except
information  supplied by LaSalle  Holdings in writing for inclusion in the Joint
Proxy  Statement (as defined  herein),  will not, as of the date the Joint Proxy
Statement is first mailed to such  shareholders  and on the date of the meetings
of Trenwick's  stockholders or LaSalle Holdings'  shareholders,  as the case may
be, and the date of any postponement or adjournment thereof,  contain any untrue
statement of a material  fact or omit to state any material  fact required to be
stated therein or necessary in order to make the statements therein, in light of
the  circumstances  under which they were made, not misleading.  The information
and documents  referred to in the previous two sentences are herein  referred to
as the "Joint Proxy  Statement."  All documents that Trenwick is responsible for
filing with any  Governmental  Authority  in  connection  with the  transactions
contemplated  hereby will comply as to form in all  material  respects  with the
provisions of any applicable law.

         Section 3.11.     Material Contracts.  Except as set forth  in  Section
3.11 of the Trenwick Disclosure Letter:

         (a) All of the  contracts  of Trenwick  and its  Subsidiaries  that are
required to be  described in the Trenwick SEC Reports or to be filed as exhibits
thereto (including, without limitation, contracts of  Chartwell) are  described



                                       20

<PAGE>


described in the Trenwick SEC Reports or filed  as exhibits  thereto and  are in
full force and effect.

         (b)  Neither  Trenwick  nor any of its  Subsidiaries  is a party to any
agreement  containing any provision or covenant limiting in any material respect
the ability of Trenwick or any of its  Subsidiaries  (or New  Holdings or any of
its  Subsidiaries  subsequent to the Effective Time) to (i) sell any products or
services of or to any other  Person,  (ii) engage in any line of business in any
geographical  area or (iii) compete with or to obtain  products or services from
any Person or limiting the ability of any Person to provide products or services
to Trenwick or any of its Subsidiaries.

         (c) Neither Trenwick nor any of its Subsidiaries is a party to or bound
by any  contract,  agreement  or  arrangement  which  would  cause the rights or
obligations of any party thereto to change in the event of the Plans, except for
any such  contract,  agreement  or  arrangement  which would not  reasonably  be
expected to have, individually or in the aggregate, a Material Adverse Effect on
Trenwick.

         Section 3.12.     Taxes.  Except as  provided  in  Section  3.12 of the
Trenwick Disclosure Letter:

         (a) Trenwick and its Subsidiaries have filed or caused to be filed with
the  appropriate  United  States  federal,   state,  local,  foreign  and  other
Governmental  Authorities,  all Tax  returns,  information  returns  and reports
required to be filed on or prior to the date  hereof  (taking  into  account all
valid  extensions).  All such Tax returns,  information  returns and reports are
complete and accurate in all material respects.

         (b) Trenwick and its  Subsidiaries  have paid in full or made  adequate
provision (in accordance with GAAP) for the payment of all Taxes shown to be due
on the  Tax  returns  referred  to in  Section  3.12(a).  All  material  written
assessments  of Taxes due and  payable by or on behalf of Trenwick or any of its
Subsidiaries  have either been paid or provided for (in accordance with GAAP) or
are being contested in good faith by appropriate proceedings.

         (c) There are no material Tax claims pending against Trenwick or any of
its  Subsidiaries  and Trenwick  does not know of any  threatened  claim for Tax
deficiencies  or any basis for such claims,  no material issues have been raised
in any  examination  by any taxing  authority with respect to Trenwick or any of
its Subsidiaries which, by application of similar  principles,  reasonably could
be  expected  to result in a  proposed  deficiency  for any other  period not so
examined,  and there are not now in force any waivers or  agreements by Trenwick
or any of its  Subsidiaries  for the extension of time for the assessment of any
material Tax, nor has any such waiver or agreement  been requested by any taxing
authority.  Neither  Trenwick nor any of its  Subsidiaries has any liability for
any material United States federal,  state, local, foreign or other Taxes of any
corporation or entity other than Trenwick and its Subsidiaries.




                                       21

<PAGE>



         (d) There are no Liens on any of the assets of  Trenwick  or any of its
Subsidiaries  that arose in connection with any failure (or alleged  failure) to
pay any Taxes (other than Taxes that are not due as of the date hereof).

         (e) Trenwick  and its  Subsidiaries  have  withheld and paid all United
States  federal,  state,  local,  foreign and other Taxes  required to have been
withheld and paid in  connection  with  amounts  paid or owing to any  employee,
independent contractor, creditor, stockholder or other third party.

         (f) To Trenwick's knowledge, Section 3.12(f) of the Trenwick Disclosure
Letter  discloses,  with respect to the year ended December 31, 1998 and for the
period  commencing  January  1,  1999 and  ending  on the  date of the  Trenwick
Disclosure Letter, (i) each insurance or reinsurance  transaction by Trenwick or
any of its  Subsidiaries  directly with  stockholders  of Trenwick and (ii) each
insurance  or  reinsurance  transaction  by Trenwick or any of its  Subsidiaries
directly or indirectly  with Persons related to stockholders of Trenwick and not
disclosed  in  clause  (i)  above,  which  would  cause  Trenwick  or any of its
Subsidiaries to have any "related person insurance income" within the meaning of
Section 953(c)(2) of the Code.

         (g) To Trenwick's knowledge, Trenwick and its Subsidiaries did not have
for the year ended December 31, 1998,  and Trenwick does not expect  Trenwick or
any of its  Subsidiaries  to have for the period  ending at the  Effective  Time
(treating such period as if it were a taxable year),  "related person  insurance
income"  within the  meaning of Section  953(c)(2)  of the Code in excess of the
exceptions provided in Sections 953(c)(3)(A) and (B) of the Code.

         (h) To Trenwick's knowledge,  except as disclosed in Section 3.12(h) of
the Trenwick Disclosure Letter, neither Trenwick nor any of its Subsidiaries is,
nor has Trenwick or any of its  Subsidiaries  ever been, a  "controlled  foreign
corporation" within the meaning of Section 957(a) or 957(b) of the Code.

         (i) A  representation  with respect to Taxes  contained in this Section
3.12 shall be deemed to be accurate unless an inaccuracy contained therein would
reasonably be expected to have,  individually  or in the  aggregate,  a Material
Adverse Effect on Trenwick.

         Section  3.13.    Litigation.  Except as disclosed  in the Trenwick SEC
Reports  filed  prior to the date  hereof  or in  Section  3.13 of the  Trenwick
Disclosure  Letter,  there  are  no  actions,  suits,  claims,   proceedings  or
investigations  pending  against or, to the  knowledge of  Trenwick,  threatened
against  or  affecting,  Trenwick  or any of its  Subsidiaries  or any of  their
respective  properties or any syndicates  managed by a Lloyd's or other managing
agency which is a Subsidiary of Trenwick ("Trenwick Managing Agency") before any
Governmental  Authority  or  otherwise  which  (a)  would be  expected  to have,
individually or in the aggregate,  a Material Adverse Effect on Trenwick, (b) in
any  manner  challenges  or  seeks  to  prevent,  enjoin,  alter  or  delay  the
transactions  contemplated hereby or (c) alleges criminal action or inaction. As
of the  date  hereof,  neither  Trenwick  nor its  Subsidiaries  or any of their
respective  properties  is  subject to any order,  writ,  judgment,  injunction,
decree,  determination or award having, or which would reasonably be expected to
have, a Material Adverse Effect on Trenwick or which  would prevent or delay the



                                       22

<PAGE>



consummation of the transactions contemplated hereby. Except as disclosed in the
Trenwick SEC Reports filed prior to the date hereof, there are no pending or, to
the knowledge of Trenwick,  threatened claims for indemnification by Trenwick or
any of its Subsidiaries in favor of directors, officers, employees and agents of
Trenwick or any of its Subsidiaries.

         Section  3.14.    Title to  Properties;  Leases  Except as set forth in
Section  3.14(a) of the  Trenwick  Disclosure  Letter,  each of Trenwick and its
Subsidiaries  has good and  marketable  title to, and is the lawful owner of, or
has the right to use pursuant to a license or otherwise, all of the tangible and
intangible assets, properties and rights used in its businesses and all tangible
and intangible  assets,  properties and rights reflected on the balance sheet of
Trenwick dated September 30, 1999 or acquired since September 30, 1999, free and
clear of all Liens (other than Permitted Liens) and material  defects.  Trenwick
and its  Subsidiaries  own no real  property.  Section  3.14(b) of the  Trenwick
Disclosure  Letter sets forth all material real  property and personal  property
leases of Trenwick and its Subsidiaries.  All such leases are valid, binding and
enforceable  against  Trenwick or its  Subsidiaries  (and,  to the  knowledge of
Trenwick and its  Subsidiaries,  each other party  thereto) in  accordance  with
their  respective  terms,  and  there  does not  exist,  under any lease of real
property or personal  property,  any material  defect or any event  which,  with
notice or lapse of time or both,  would  constitute  a  material  default by the
Trenwick  or its  Subsidiaries,  as the case may be,  or,  to the  knowledge  of
Trenwick and its Subsidiaries, by any other party thereto.

         Section 3.15.     Employees.

         (a)  Section  3.15(a)  of the  Trenwick  Disclosure  Letter  lists  all
employment  contracts and similar  arrangements  between  Trenwick or any of its
Subsidiaries  and  their  respective   executive  officers  and  all  plans  and
arrangements  pursuant to which Trenwick or any of its Subsidiaries is obligated
to make any payment or confer any material  benefit upon any officer,  director,
employee or agent of Trenwick  or any of its  Subsidiaries  as a result of or in
connection  with any of the  transactions  contemplated by this Agreement or any
transaction or transactions  resulting in a change of control of Trenwick or any
of its  Subsidiaries  (including as a result of a  termination  of employment in
connection  with any of such events).  Except as described in Section 3.15(a) of
the Trenwick Disclosure Letter and except as would not reasonably be expected to
have a Material  Adverse Effect on Trenwick,  (a) Trenwick and its  Subsidiaries
have  complied  with all laws  relating to the  employment  of labor,  including
provisions  thereof relating to wages,  hours,  equal opportunity and collective
bargaining  and (b) no labor  dispute  with  employees of Trenwick or any of its
Subsidiaries  exists  or, to the  knowledge  of  Trenwick,  is  threatened.  The
severance  costs  associated  with the  acquisition  of  Chartwell  and  related
workforce  reductions  have  been  identified  and are as set  forth in  Section
3.15(a) of the Trenwick Disclosure Letter.

         (b) Except as set forth in Section  3.15(b) of the Trenwick  Disclosure
Letter,  neither  Trenwick  nor  any  of  its  Subsidiaries  is a  party  to any
collective  bargaining  or other  labor  union  contract  applicable  to Persons
employed  by  Trenwick  or any of its  Subsidiaries,  no  collective  bargaining
agreement  is  being  negotiated  by  Trenwick  or any of its  Subsidiaries  and
Trenwick has no knowledge of any activities or proceedings of any labor union to



                                       23

<PAGE>



organize any of their respective employees. There is no labor dispute, strike or
work  stoppage  against  Trenwick  or any of its  Subsidiaries  pending  or,  to
Trenwick's  knowledge,  threatened  which  may  interfere  with  the  respective
business  activities of Trenwick or any of its  Subsidiaries,  except where such
dispute,  strike or work  stoppage  would not  reasonably  be expected to have a
Material Adverse Effect on Trenwick.

         (c) Trenwick has made all necessary  notifications  to and received all
necessary  consents  from  Lloyd's and the  Financial  Services  Authority  with
respect to the employment of personnel requiring such notification or consents.

         Section 3.16.     Benefit Plans.

         (a) (i) Each Employee  Benefit Plan  maintained or  contributed  to, or
required  to be  maintained  or  contributed  to,  by  Trenwick  or  any  of its
Subsidiaries for the benefit of any present or former U.S. officer,  employee or
director of Trenwick or any of its Subsidiaries (all the foregoing  collectively
referred to  hereinafter  as  "Trenwick  Benefit  Plans") has been  administered
substantially  in accordance  with its terms and any related trust  agreement or
insurance  contract has been  administered  substantially in accordance with its
terms.  Trenwick,  its  Subsidiaries and all the Trenwick Benefit Plans, and any
related trust agreements or insurance contracts,  are in substantial  compliance
with the applicable provisions of ERISA, the Code, all other applicable laws and
all applicable collective bargaining agreements.

                  (ii)  None of  Trenwick  or any other  person  or entity  that
                  together with Trenwick is treated as a single  employer  under
                  Section 414 of the Code (each a "Trenwick Commonly  Controlled
                  Entity") has incurred any material liability under Title IV of
                  ERISA  (other  than for the  payment of benefits or the timely
                  payment  of Pension  Benefit  Guaranty  Corporation  insurance
                  premiums,  in either  case in the  ordinary  course)  or under
                  Section 412(f) or 412(n) of the Code, and no condition  exists
                  which  could  reasonably  be  expected  to  present  a risk of
                  Trenwick or any Commonly  Controlled  Entity  incurring such a
                  material liability.

                  (iii) Neither  Trenwick nor any Trenwick  Commonly  Controlled
                  Entity is obligated to contribute to any "multiemployer  plan"
                  (as defined in Section  3(37) or Section  4001(a)(3) of ERISA)
                  or has any material liability,  including current or potential
                  withdrawal  liability  (within the meaning of Section  4201 of
                  ERISA) with respect to any multiemployer plan.

                  (iv) Except as  contemplated by Section 2.4 or as disclosed in
                  the Filed Trenwick SEC Documents or in Section  3.16(a)(iv) of
                  the Trenwick Disclosure  Schedule,  since the date of the most
                  recent  audited  financial  statements  included  in the Filed
                  Trenwick  SEC  Documents,  there has not been any  adoption or
                  amendment  by  Trenwick  or  any of  its  Subsidiaries  of any
                  collective bargaining agreement or any Trenwick Benefit Plan.



                                       24

<PAGE>



                  Except  as  disclosed  in the   Filed Trenwick  SEC  Documents
                  or  in    Section  3.16 (a)(iv)  of  the Trenwick   Disclosure
                  Schedule,  there  exist   no  employment,  consulting,  change
                  in   control,  severance,   termination  or    indemnification
                  agreements,  arrangements  or understandings between  Trenwick
                  or any  Subsidiary and any current or former employee, officer
                  or director  of  Trenwick  or  any Subsidiary or any  Trenwick
                  Benefit Plan.

                  (v) All material  contributions and other payments required to
                  be  made by  Trenwick  and its  subsidiaries  to any  Trenwick
                  Benefit  Plan prior to the date  hereof have been made and all
                  accruals  required to be made under any Trenwick  Benefit Plan
                  have been made. There is no claim, dispute, grievance, charge,
                  complaint,  restraining  or  injunctive  order,  litigation or
                  proceeding   pending,   or,  to  the  knowledge  of  Trenwick,
                  threatened  or  anticipated  (other  than  routine  claims for
                  benefits)  against or relating to any Trenwick Benefit Plan or
                  against the assets of any  Trenwick  Benefit  Plan which could
                  reasonably  be  expected  to result in the  imposition  of any
                  material  liability of Trenwick.  Neither  Trenwick nor any of
                  its Subsidiaries  has  communicated  generally to employees or
                  specifically to any employee  regarding any future increase of
                  benefit  levels (or future  creations  of new  benefits)  with
                  respect to any Trenwick Benefit Plans.

                  (vi) Each Trenwick Benefit Plan can be terminated or otherwise
                  discontinued   without  any   liability  to  Trenwick  or  any
                  Subsidiary  that  would  reasonably  be  expected  to  have  a
                  Material Adverse Effect. With respect to each Trenwick Benefit
                  Plan  subject  to Title IV of ERISA and with  respect  to each
                  plan of a Trenwick Commonly Controlled Entity subject to Title
                  IV of ERISA (each a "Trenwick  Defined Benefit Plan") Trenwick
                  Defined  Benefit  Plan  (i) no  termination  of  any  Trenwick
                  Defined  Benefit  Plan has  occurred  pursuant  to  which  all
                  liabilities  have not been satisfied in full, and no event has
                  occurred  and no  condition  exists that could  reasonably  be
                  expected  to  result  in  Trenwick  or any  Trenwick  Commonly
                  Controlled Entity incurring  liability under Title IV of ERISA
                  or could  constitute  grounds  for  terminating  any  Trenwick
                  Defined Benefit Plan; (ii) each Trenwick  Defined Benefit Plan
                  which is subject  to Part 3 of  Subtitle B of Title I of ERISA
                  or Section 412 of the Code, has been  maintained in compliance
                  with the minimum  funding  standards of ERISA and the Code and
                  no  such  Trenwick  Defined  Benefit  Plan  has  incurred  any
                  "accumulated funding deficiency," as defined in Section 412 of
                  the Code and  Section  302 of ERISA,  whether  or not  waived;
                  (iii) neither  Trenwick nor any Trenwick  Commonly  Controlled
                  Entity  has  sought  or  received  a  waiver  of  its  funding
                  requirements with respect to any Trenwick Defined Benefit Plan
                  and all  material  contributions  payable with respect to each
                  Defined Benefit Plan have been timely made; (iv) no reportable
                  event,  within the  meaning of Section  4043 of ERISA,  and no
                  event described in Section 4062 or 4063 of ERISA, has occurred
                  with respect to any Trenwick  Defined  Benefit  Plan;  (v) the
                  aggregate  accumulated  benefit  obligations  of each Trenwick
                  Defined Benefit Plan  subject to Title IV of ERISA (as of the


                                       25

<PAGE>



                  date of the  most recent  actuarial  valuation   prepared for
                  such Trenwick  Defined  Benefit Plan)  do not  exceed the fair
                  market value of the assets of such  Trenwick  Defined  Benefit
                  Plan (as of the date of such valuation); and (vi) no amendment
                  has been made to any  Trenwick  Defined  Benefit Plan that has
                  required or would  require  the  provision  of security  under
                  ERISA Section 307 or Code Section 401(a)(29).

                  (vii)  The  execution,   delivery  and   performance  of  this
                  Agreement and the transactions contemplated hereby will not in
                  and of  themselves  result in the  imposition  of any  federal
                  excise tax with respect to any Trenwick Benefit Plan.

                  (viii)  Neither  Trenwick  nor  any  Subsidiary  maintains  or
                  contributes (or has maintained or contributed to) any Trenwick
                  Benefit  Plan which  provides,  or has a liability to provide,
                  life insurance,  medical, severance, or other employee welfare
                  benefits to any employee upon his retirement or termination of
                  employment,  except as may be required by Section 4980B of the
                  Code.

                  (ix) Neither Trenwick nor any of its subsidiaries maintains or
                  contributes to a trust,  organization or association described
                  in any of the Sections  501(c)(9),  501(c)(17) or 501(c)(2) of
                  the Code.

                  (x)  Favorable  determination  letters have been received from
                  the Internal  Revenue  Service  with respect to each  Trenwick
                  Benefit  Plan which is intended to comply with the  provisions
                  of Section 401(a) of the Code, and each such Trenwick  Benefit
                  Plan  complies  in  form  and in  operation  in  all  material
                  respects  with the  requirements  of a "qualified  plan" under
                  Section 401(a) of the Code.

                  (xi) Neither Trenwick nor any of its Subsidiaries,  nor any of
                  their  respective  directors,  officers,  employees or, to the
                  knowledge of Trenwick any other  "fiduciary,"  as such term is
                  defined  in  Section  3(21) of ERISA,  has any  liability  for
                  failure  to comply  with  ERISA or the Code for any  action or
                  failure  to act  in  connection  with  the  administration  or
                  investment of the Trenwick Benefit Plans.

                  (xii)  There has been no act or acts which  would  result in a
                  disallowance  of a  deduction  or  the  imposition  of  a  tax
                  pursuant  to  Section  4980B,  or with  regard  to plan  years
                  beginning before December 31, 1988, Section 162(i) of the Code
                  as in  effect  immediately  prior  to  the  enactment  of  the
                  Technical  and  Miscellaneous  Revenue  Act  of  1988,  or any
                  regulations promulgated  thereunder,  whether final, temporary
                  or  proposed.  No event has  occurred  with  respect  to which
                  Trenwick or any of its subsidiaries  could be liable for a tax
                  imposed  by Chapter  43 of  Subtitle  A of the Code,  or for a
                  civil  penalty  or other  liability  under  Section  502(c) or
                  Section 501(l) of ERISA.  Each Trenwick Benefit Plan that is a
                  "group  health  plan"  as  defined  in  Section  607 of  ERISA
                  complies in all material respects and  has  been  operated in
                  substantial compliance in all respects with Part 7 of Title I,
                  Subtitle B of ERISA and Subtitle K of the Code.



                                       26

<PAGE>




                  (xiii) With  respect to each of the  Trenwick  Benefit  Plans,
                  Trenwick has  delivered to LaSalle  Holdings true and complete
                  copies of: (a) the plan documents, including any related trust
                  agreements, insurance contracts or other funding arrangements,
                  or a written  summary of the terms and  conditions of the plan
                  if there is no  written  plan  document;  (b) the most  recent
                  determination   letter  received  from  the  Internal  Revenue
                  Service;  (c) the  most  recent  IRS Form  5500;  (d) the most
                  recent  actuarial  valuation;  (e) the most  recent  financial
                  statement;  (f) all material  correspondence with the Internal
                  Revenue  Service,  the  Department  of Labor  and the  Pension
                  Benefit  Guaranty  Corporation  with respect to the past three
                  plan years other than IRS Form 5500  filings and PBGC  premium
                  payments; and (g) the most recent summary plan description.

                  (xiv)  None  of the  payments  contemplated  by  any  Trenwick
                  Employee  Benefit Plans would,  in the  aggregate,  constitute
                  excess  parachute  payments (as defined in Section 280G of the
                  Code (without regard to subsection (b)(4) thereof)).

                  (xv) Except as  disclosed  in the Section  3.16(a)(xv)  of the
                  Trenwick  Disclosure  Letter,  the consummation of the Plan of
                  Reorganization  (or  the  approval  thereof  by  the  parties'
                  respective    shareholders)   and   the   other   transactions
                  contemplated  by this  Agreement,  will  not (x)  entitle  any
                  employees or directors of Trenwick or of any Trenwick Commonly
                  Controlled  Entity,  directly or indirectly to severance  pay;
                  (y)  accelerate  the time of payment or vesting or trigger any
                  payment of  compensation  or benefits  under,  or increase the
                  amount  payable  or  trigger  any  other  material  obligation
                  pursuant to, any of the Trenwick  Benefit Plans; or (z) result
                  in any breach or  violation  of, or  default  under any of the
                  Trenwick Benefit Plans.

         (b) Except as would not have a  Material  Adverse  Effect on  Trenwick,
except as set forth in Section 3.16(b) of the Trenwick  Disclosure Letter and so
far as Pierre D. Croizat,  Russell J. English,  Andrew Okell and Joanne Merrick,
who are senior management of Trenwick's international operations, are aware:

                  (i) There is no existing or threatened  or pending  industrial
                  or trade  dispute  involving  Trenwick  International  Limited
                  ("Trenwick   International")  and  any  of  the  employees  of
                  Trenwick  International  and there are no facts known or which
                  would on reasonable inquiry be known to Trenwick International
                  which  might  indicate  that  there  may be any  such  dispute
                  (excluding  the Plan of  Reorganization  and the  transactions
                  contemplated  by this  Agreement).  There are no agreements or
                  arrangements (whether oral or in writing or existing by reason
                  of custom and  practice  and whether or not  legally  binding)
                  between  Trenwick  International  and any trade union or other
                  employees'   representatives  or  organization  concerning  or
                  affecting the  employees  of Trenwick International and  there
                  are  no  trade  unions  or  other  employees'  representatives
                  whom  Trenwick  International  recognizes  to  any  extent for



                                       27

<PAGE>



                  collective  bargaining   purposes  nor,  so  far  as  Trenwick
                  International is aware, has Trenwick  International done  any
                  act which might be construed as recognition.

                  (ii)  Trenwick  International  has  given  no  notice  of  any
                  redundancies  to the  U.K.  Secretary  of  State  nor  started
                  consultations  with any independent  trade union or employees'
                  representatives  within  the  preceding  period of one year in
                  relation  to  any  employees  of  Trenwick  International.  No
                  circumstances  have arisen under which Trenwick  International
                  is likely to be required to pay damages for wrongful dismissal
                  or breach of contract,  to make any  contractual  or statutory
                  redundancy  payment or make or pay any compensation in respect
                  of  unfair  dismissal,  to make any  other  payment  under any
                  employment protection legislation or to reinstate or re-engage
                  any former employee.  No circumstances have arisen under which
                  Trenwick International is likely to be required to pay damages
                  or compensation,  or suffer any penalty or be required to take
                  corrective  action  or be  subject  to any form of  discipline
                  under the  Employment  Rights  Act 1996,  the Trade  Union and
                  Labor  Relations  (Consolidation)  Act 1992,  the  Transfer of
                  Undertakings  (Protection of Employment) Regulations 1981, the
                  Sex  Discrimination  Act 1975,  the  Equal  Pay Act 1970,  the
                  Treaty  of  Rome  or  any  Directive  or  recommendation  made
                  pursuant to it, the Race  Relations Act 1976 or the Disability
                  Discrimination  Act 1995. So far as Trenwick  International is
                  aware,  there are no current,  pending or threatened claims of
                  any type  against  Trenwick  International  by any existing or
                  former employees or directors of Trenwick  International or by
                  any existing or former consultants to Trenwick International.

                  (iii) There are no  existing  service or other  agreements  or
                  contracts  between  Trenwick  International  and  any  of  its
                  directors or executives or employees  which cannot be lawfully
                  terminated  by six  calendar  months'  notice or less  without
                  giving  rise to any claim for  damages or  compensation  other
                  than a  statutory  redundancy  payment  or a claim for  unfair
                  dismissal  depending on the  circumstances of the termination.
                  Trenwick  International  has  complied  with all its  material
                  obligations  under  all  legislation,  regulations  and  other
                  requirements  having  the  force  of law  (including,  without
                  limitation,   orders  and  awards)  in  connection   with  its
                  employees, directors and consultants.

                  (iv) Trenwick  International  is not involved in  negotiations
                  (whether with employees or any trade union or other employees'
                  representatives)   to  vary  the  terms  and   conditions   of
                  employment or engagement of any of its employees, directors or
                  consultants  and has not made any  representations,  promises,
                  offers or  proposals  to any of its  employees,  directors  or
                  consultants  or  to  any  trade  union  or  other   employees'
                  representatives   concerning   or  affecting   the  terms  and
                  conditions   of   employment  or  engagement  of  any  of  its
                  employees, directors or consultants.



                                       28

<PAGE>



                  (v) Trenwick  International  has discharged its obligations in
                  full in relation to salary, wages, fees, commission,  bonuses,
                  overtime pay, holiday pay, sick pay and all other benefits and
                  emoluments   relating  to  its  employees,   consultants   and
                  directors in respect of all prior periods.

                  (vi) There are no pension, share option, share incentive, life
                  assurance,  disability  or similar  schemes,  arrangements  or
                  obligations   for  any  employees  or  directors  of  Trenwick
                  International,  and Trenwick  International has no obligations
                  (whether  legally binding or established by custom) to pay any
                  pension or make any other payment after retirement or death or
                  otherwise to provide "relevant benefits" within the meaning of
                  Section 612 of the U.K. Income and Corporation  Taxes Act 1988
                  or to make any  payment  for the  purpose  of  providing  such
                  "relevant  benefits" to or in respect of any person who is now
                  or has been an officer or employee  of Trenwick  International
                  and is not a party to any scheme or arrangement  having as its
                  purpose or one of its purposes the making of such  payments or
                  the provision of such benefits.

                  (vii) All Employee  Benefit  Plans comply with and have at all
                  times complied with the provisions of the relevant legislation
                  and the  requirements  of the Pension  Schemes  Office and the
                  Contributions  Agency affecting schemes approved under Chapter
                  I of Part XIV of the U.K.  Income  and  Corporation  Taxes Act
                  1988. Trenwick  International and the trustees of such schemes
                  have duly complied with their respective obligations under the
                  trust deeds and the rules thereof and under the aforementioned
                  legislation and requirements.  All amounts due to the trustees
                  thereof or to any insurance  company in  connection  therewith
                  have been paid.

                  (viii) Neither Trenwick  International nor the trustees of any
                  pension  scheme is engaged in any  litigation  or  arbitration
                  proceedings  in respect of any  Employee  Benefit  Plan or any
                  benefit  provided  thereunder  in relation to the employees or
                  former  employees of Trenwick  International  and there are no
                  current  submissions or referrals to the Pensions Ombudsman or
                  to the  Occupational  Pensions  Advisory Service in respect of
                  Trenwick International or any pension scheme.

                  (ix) No Employee  Benefit  Plan in which  employees  or former
                  employees  of  Trenwick  International   participate  or  have
                  participated  has been or is in the  process  of being  (or is
                  proposed  to be)  wound up (in  whole or in part) or closed to
                  new entrants (in whole or in part).

         Section 3.17. Intellectual Property.  Trenwick and its Subsidiaries own
or possess,  or have all necessary  rights and licenses in, all patents,  patent
rights, licenses, inventions (whether or not patentable or reduced to practice),
copyrights  (whether  registered or  unregistered),  know-how  (including  trade
secrets and other  unpatented  and/or  unpatentable  proprietary or confidential
information,  systems or procedures),  registered and  unregistered  trademarks,
service  marks  and  trade  names  and  other   intellectual   property   rights
(collectively, "Intellectual Property") necessary to conduct their  business as



                                       29

<PAGE>



conducted and proposed to be conducted  except to the extent that the failure of
Trenwick or its  Subsidiaries  to own or have such  rights and  licenses in such
Intellectual  Property  would not  reasonably  be  expected  to have a  Material
Adverse Effect on Trenwick.  Neither Trenwick nor any of its  Subsidiaries  have
received any unresolved  notice of, or is aware of any fact or circumstance that
would give any Person a right to assert, infringement or misappropriation of, or
conflict with,  asserted rights of others or invalidity or  unenforceability  of
any  Intellectual  Property  owned by Trenwick or any of its  Subsidiaries  with
respect  to  any of the  foregoing  which,  singly  or in the  aggregate,  would
reasonably  be expected to have a Material  Adverse  Effect on Trenwick.  To the
knowledge  of  Trenwick,  the use of such  Intellectual  Property to conduct the
business  and  operations  of Trenwick  and its  Subsidiaries  as  conducted  or
proposed to be  conducted  does not  infringe on the rights of any person in any
case where such  infringement  would  reasonably  be expected to have a Material
Adverse  Effect  on  Trenwick.  To the  knowledge  of  Trenwick,  no  person  is
challenging,  infringing on or otherwise  violating any right of Trenwick or any
of its Subsidiaries  with respect to any  Intellectual  Property owned by and/or
licensed to Trenwick or any of its Subsidiaries.  Except as set forth in Section
3.17 of the Trenwick Disclosure Letter,  neither the execution of this Agreement
or the  Stock  Option  Agreements  nor  the  consummation  of  the  transactions
contemplated hereby or thereby will result in a loss or limitation in the rights
and  licenses  of  Trenwick  to use or enjoy  the  benefit  of any  Intellectual
Property  employed by Trenwick or any of its Subsidiaries in connection with its
business as conducted or proposed to be conducted where such loss or limitation,
individually  or in the  aggregate,  would  reasonably  be  expected  to  have a
Material  Adverse Effect on Trenwick.  Following the Effective Date,  Trenwick's
Intellectual  Property may be used by New  Holdings or any of its  Subsidiaries,
except to the extent that failure to be so able to use  Trenwick's  Intellectual
Property would not have a Material  Adverse Effect on New Holdings or any of its
Subsidiaries.


         Section  3.18.    Takeover  Statutes.  No "fair  price,"  "moratorium,"
"control share acquisition" or other similar anti-takeover statute or regulation
enacted  under any Delaware  law is  applicable  to the Plans,  the Stock Option
Agreements or the other transactions  contemplated  hereby or thereby.  Trenwick
has taken all corporate action necessary to render the provisions of Section 203
of the GCL inapplicable to the Plans, the Stock Option  Agreements and the other
transactions contemplated hereby and thereby.

         Section 3.19.     Opinion of Financial Advisor.  Trenwick has  received
the written opinion of Donaldson,  Lufkin & Jenrette ("DLJ"), dated December 16,
1999, to the effect that, as of such date,  the Trenwick  Exchange Ratio is fair
to Trenwick from a financial point of view, a copy of which written opinion will
be delivered to LaSalle Holdings.

         Section 3.20.     Rights Agreement.

         (a)  Trenwick  and its Board of  Directors  have  taken  all  necessary
actions,  including the amendment to the Rights Agreement, so that the execution
and  delivery of this  Agreement,  the LaSalle  Stock  Option  Agreement  or the
consummation of the  transactions  contemplated  hereby and thereby will not (i)
cause any of the Rights to  become exercisable, (ii) cause  LaSalle Holdings  or


                                       30

<PAGE>

New Holdings to be an Acquiring  Person (as defined in the Rights  Agreement) or
(iii) trigger other provisions of the Rights Agreement, including giving rise to
a  Distribution  Date (as defined in the Rights  Agreement),  and the Expiration
Date (as defined in the Rights  Agreement) of the Rights shall occur immediately
prior to the Effective  Time.  Such amendment  shall be in full force and effect
from and after the date hereof.

         (b) Trenwick has taken all necessary  action with respect to all of the
outstanding  Rights so that, as of immediately  prior to the Effective Time, (i)
none of Trenwick,  New Holdings,  LaSalle  Holdings,  LaSalle Re and Acquisition
will have any obligations  under the Rights or the Rights Agreement and (ii) the
holders  of the  Rights  will have no  rights  under  the  Rights or the  Rights
Agreement.

         Section 3.21.     Insurance Matters.

         (a) All insurance,  reinsurance and coinsurance treaties or agreements,
including retrocessional agreements, to which Trenwick or any Trenwick Insurance
Subsidiary or any syndicate  managed by any Trenwick  Managing Agency is a party
or under which  Trenwick or any Trenwick  Insurance  Subsidiary or any syndicate
managed by any Trenwick Managing Agency, has any existing rights, obligations or
liabilities are in full force and effect, except for such treaties or agreements
the failure to be in full force and effect of which are not reasonably  expected
to  have,  individually  or in the  aggregate,  a  Material  Adverse  Effect  on
Trenwick.

         (b) Prior to the date hereof,  Trenwick has delivered or made available
to  LaSalle  Holdings  a true and  complete  copy of the most  recent  actuarial
reports  prepared  by  actuaries,  independent  or  otherwise,  with  respect to
Trenwick or any Trenwick  Insurance  Subsidiary  since December 31, 1998 and all
attachments,  addenda,  supplements  and  modifications  thereto (the  "Trenwick
Actuarial  Analyses").  The  information  and data  furnished by Trenwick or any
Trenwick  Insurance  Subsidiary to its independent  actuaries in connection with
the  preparation  of Trenwick  Actuarial  Analyses were accurate in all material
respects.

         (c) Except as  disclosed  in Section  3.21 of the  Trenwick  Disclosure
Letter:

                  (i) All in-force primary insurance policies issued by Trenwick
                  or  any of  its  Insurance  Subsidiaries  are,  to the  extent
                  required   under   applicable   insurance   laws,   rules   or
                  regulations,  on forms and at rates  approved by the insurance
                  regulatory  authority of the jurisdiction where issued or have
                  been filed with and not objected to by such  authority  within
                  the  period  provided  for  objection,  except  as  would  not
                  individually  or in  the  aggregate  have a  Material  Adverse
                  Effect on Trenwick.

                  (ii)  To the  knowledge  of  Trenwick,  except  as  would  not
                  individually  or in  the  aggregate  have a  Material  Adverse
                  Effect  on  Trenwick,   each  insurance  agent  or  solicitor,
                  including, without limitation,  salaried employees of Trenwick
                  or any Insurance Subsidiary appointed as an insurance agent or
                  solicitor, at the time which agent or solicitor wrote, sold,



                                       31

<PAGE>



                  solicited or produced business for such insurer since  January
                  1, 1996, was duly licensed as an insurance agent (for the type
                  of  business  written  sold,  solicited  or produced  by  such
                  insurance  agent or solicitor in the  particular  jurisdiction
                  in  which  such  agent or solicitor  wrote, sold, solicited or
                  produced such business).

         Section 3.22.     Liabilities and Reserves.  Except for instances where
the  failure of the  following  statements  to be true would not  reasonably  be
expected to have a Material Adverse Effect on Trenwick, (a) the reserves carried
on the financial  statements of each Trenwick  Insurance  Subsidiary  for future
insurance policy benefits,  losses,  claims and similar purposes were, as of the
respective  dates  of  such  financial   statements,   in  compliance  with  the
requirements  for  reserves  established  by the  insurance  departments  of the
jurisdiction  of such Trenwick  Insurance  Subsidiary or (as the case may be) by
Lloyd's,  were  determined  in  accordance  with  generally  accepted  actuarial
standards  and  principles  consistently  applied  and  were  fairly  stated  in
accordance  with sound actuarial and statutory  accounting  principles (it being
understood that no  representation  or warranty is made in this Agreement to the
effect that such  reserves  will prove to be adequate to cover the actual amount
of  liabilities  that are  eventually  paid after the date hereof);  and (b) the
admitted  assets of each  Trenwick  Insurance  Subsidiary  as  determined  under
applicable laws or under Lloyd's  regulations are in an amount at least equal to
the minimum amounts required by applicable laws or regulations.

         Section  3.23.    Investment Company. Neither  Trenwick  nor any of its
Subsidiaries conducts activities of, or is otherwise deemed under applicable law
to control, an "investment  adviser" as such term is defined in Section 2(a)(20)
of the  Investment  Company Act of 1940,  as amended  (the  "Investment  Company
Act"),  whether or not registered under the Investment  Advisers Act of 1940, as
amended  (the  "Investment  Advisers  Act").  Neither  Trenwick  nor  any of its
Subsidiaries is an "investment  company" as defined under the Investment Company
Act and neither Trenwick nor any of its Subsidiaries sponsors any Person that is
such an investment company.

         Section 3.24.     Finite  Risk  Reinsurance.  Except  as  set  forth in
Section 3.24 of the Trenwick  Disclosure  Letter,  none of Trenwick's  Insurance
Subsidiaries  has ceded business  pursuant to a reinsurance  agreement that does
not meet the conditions for reinsurance  accounting as provided by the Statement
of  Financial  Accounting  Standards  No. 113,  "Accounting  and  Reporting  for
Reinsurance of Short-Duration and Long-Term Contracts."

         Section 3.25.     Reinsurance Contracts, Coverholders and MGAs.

         (a) Section 3.25 of the Trenwick  Disclosure Letter contains a true and
complete list of all managing general agents ("MGAs") and coverholders with whom
each  Subsidiary of Trenwick does business that have been  appointed  within the
twelve  (12)  months  preceding  the  date of this  Agreement  and all in  force
contracts,  treaties  or  arrangements  regarding  the  credit  of  reinsurance,
coinsurance, excess insurance (collectively,  the "Reinsurance Contracts") which
generate  premium  income  in  excess  of  $1,000,000.    Except  as would  not,
individually or in the aggregate, have a  Material  Adverse Effect on  Trenwick:





                                       32

<PAGE>


(i)  each of the  foregoing  Reinsurance  Contracts  is  valid  and  binding  in
accordance with its terms,  and is in full force and effect and (ii) neither the
Subsidiaries  of Trenwick  nor, to the  knowledge  of  Trenwick,  or other party
thereto,  is in  default  in any  material  respect  with  respect  to any  such
Reinsurance Contract,  nor to the knowledge of Trenwick does any condition exist
that  with  notice or lapse of time or both  would  constitute  such a  material
default  thereunder.  Except  as set  forth  in  Section  3.25  of the  Trenwick
Disclosure  Letter,  none  of the  contracts,  treaties  or  arrangements  which
generate  premium  income  in  excess  of  $1,000,000   involving  the  MGAs  or
coverholders with whom each Subsidiary of Trenwick does business contain "change
of control"  provisions and no such Reinsurance  Contract contains any provision
providing that any such other party thereto may terminate, cancel or commute the
same by reason of the  transactions  contemplated by this Agreement or any other
provision  which would be altered or otherwise  become  applicable  by reason of
such transactions, and no party has given notice of termination, cancellation or
commutation  of any such  Reinsurance  Contract or that it intends to terminate,
cancel or commute any such Reinsurance  Contract as a result of the transactions
contemplated hereby.

         (b)  Except as set forth in  Section  3.25 of the  Trenwick  Disclosure
Letter,  Trenwick  America  Reinsurance  Company  ("TARCO")  is  entitled  under
applicable insurance laws, rules and regulations to take credit in its statutory
financial  statements  in  accordance  with  Chapter  22 of the NAIC  Accounting
Practices and Procedures Manual for Property and Casualty Insurance Companies as
in effect on the date  hereof,  with respect to those  Reinsurance  Contracts to
which it is a party and all such amounts are properly reflected in the statutory
financial  statements  of  TARCO.  Except as set  forth in  Section  3.25 of the
Trenwick Disclosure Letter,  Trenwick International is entitled under applicable
insurance laws, rules and regulations to take credit in its statutory  financial
statements  in  accordance  with  Lloyd's  regulations  as in effect on the date
hereof,  with respect to those Reinsurance  Contracts to which it is a party and
all such amounts are properly reflected in the statutory financial statements of
Trenwick International.  Each of Trenwick,  TARCO and Trenwick International has
no knowledge of any disputes as to reinsurance or retrocessional coverage under,
or any terms of provisions of, any such Reinsurance Contract except as would not
reasonably be expected to have,  individually  or in the  aggregate,  a Material
Adverse Effect on Trenwick.  To the knowledge of Trenwick and TARCO and Trenwick
International,   the  financial  condition  of  any  other  party  to  any  such
Reinsurance  Contract is not  impaired  to the extent that a default  thereunder
could reasonably be expected to occur.

         Section  3.26.    Derivatives. As of the date hereof, other than as set
forth in Section 3.26 of the Trenwick  Disclosure  Letter,  neither Trenwick nor
any of its  Subsidiaries is a party to any futures or option  contracts,  swaps,
hedges or similar  instruments  which,  individually or in the aggregate,  could
have a Material Adverse Effect on Trenwick.

         Section  3.27.    Related  Party  Transactions. Except  as set forth in
Section 3.27 of the Trenwick Disclosure Letter,  since September 30, 1999, there
have been no transactions,  agreements,  arrangements or understandings  between
Trenwick and its Subsidiaries,  on the one hand, and Trenwick  affiliates (other
than wholly-owned Subsidiaries of Trenwick) or other Person, on the  other hand,
in existence as of the date hereof that are or would be required to be disclosed
in the Trenwick SEC Reports in accordance  with Item 404 of Regulation S-K under
the Securities Act.




                                       33

<PAGE>



                                    ARTICLE 4

               REPRESENTATIONS AND WARRANTIES OF LASALLE HOLDINGS

         LaSalle  Holdings  hereby  represents  and warrants to Trenwick and the
Minority  Shareholders that as of the date of the Original  Agreement (except to
the extent that a representation or warranty speaks as of an earlier date), with
references to "the date hereof" or the "date of this  Agreement" in this Article
4 being deemed to be references to the date of the Original Agreement:

         Section 4.1.      Corporation; Organization.

         (a) Except as set forth in  Section  4.1(a) of the  LaSalle  Disclosure
Letter,  each  of  LaSalle  Holdings  and its  Subsidiaries  is a  company  duly
organized,  validly existing and in good standing (with respect to jurisdictions
that  recognize  such  concept)  under  the  laws  of  the  jurisdiction  of its
organization.  Each of LaSalle  Holdings and its  Subsidiaries (i) is qualified,
licensed or domesticated as a foreign  company in all  jurisdictions  where such
qualification,  license or  domestication  is  required  to own and  operate its
properties  and conduct its  business in the manner and at the places  presently
conducted; (ii) holds all franchises, grants, licenses,  certificates,  permits,
consents and orders,  all of which are valid and in full force and effect,  from
all applicable Bermuda and foreign regulatory  authorities  necessary to own and
operate  its  properties  and to conduct  its  business in the manner and at the
places presently  conducted;  and (iii) has full power and authority  (corporate
and other) to own, lease and operate its respective properties and assets and to
carry on its business as presently  conducted  and as proposed to be  conducted,
except where the failure to be so qualified, licensed or domesticated or to hold
such franchises, grants, licenses, certificates, permits, consents and orders or
to have such power and authority  would not, when taken  together with all other
such  failures,  reasonably  be  expected to have a Material  Adverse  Effect on
LaSalle  Holdings.  LaSalle  Holdings  has  furnished  to Trenwick  complete and
correct copies of its memorandum of association and bye-laws as in effect on the
date hereof.  Such  memorandum of association and bye-laws are in full force and
effect and no other  constitutional  documents are applicable to or binding upon
LaSalle Holdings.

         (b) LaSalle Holdings  conducts its reinsurance  operations  through the
Subsidiaries  set forth in  Section  4.1(b)  of the  LaSalle  Disclosure  Letter
(collectively,  the  "LaSalle  Reinsurance  Subsidiaries").  Each of the LaSalle
Reinsurance  Subsidiaries  is (i) duly  licensed or authorized as a reinsurer in
its  jurisdiction of organization or duly licensed to operate in the reinsurance
business (as applicable) in its jurisdiction of organization, (ii) duly licensed
or authorized as a reinsurer in each other  jurisdiction where it is required to
be so  licensed or  authorized  or duly  licensed to operate in the  reinsurance
business in each other  jurisdiction  where it is required to be so licensed and
(iii)  duly  authorized  in its  jurisdiction  of  organization  and each  other
applicable jurisdiction to write each line of business currently written by such


                                       34

<PAGE>


LaSalle Reinsurance Subsidiaries, except, in any such case, where the failure to
be so licensed or authorized is not reasonably expected to have, individually or
in the aggregate,  a Material Adverse Effect on LaSalle Holdings.  Except as set
forth in Section 4.1(b) of the LaSalle Disclosure  Letter,  LaSalle Holdings has
made all required  filings under applicable  insurance  holding company statutes
except where the failure to file is not  reasonably  expected to have a Material
Adverse Effect on LaSalle Holdings.

         Section 4.2.      Authority; Approval and Fairness.

         (a) LaSalle Holdings has all requisite corporate power and authority to
execute and deliver this Agreement and, subject to the due approval and adoption
of this Agreement by its shareholders,  to perform its obligations hereunder and
consummate  the  transactions  contemplated  hereby.  LaSalle  Holdings  has all
requisite  corporate  power  and  authority  to  enter  into  the  Stock  Option
Agreements  and  to  consummate  the  transactions   contemplated  thereby.  The
execution and delivery of this Agreement by LaSalle Holdings, the performance by
LaSalle  Holdings of its obligations  hereunder and the  consummation by LaSalle
Holdings of the  transactions  contemplated  hereby have been duly authorized by
all necessary corporate action on the part of LaSalle Holdings,  subject only to
compliance  with the  provisions  of Section 99 of the  Companies  Act. No other
corporate  proceedings  on the part of LaSalle  Holdings are  necessary  for the
execution and delivery of this  Agreement by LaSalle  Holdings  and,  subject to
compliance  with  the  provisions  of  Section  99 of  the  Companies  Act,  the
performance  by  LaSalle   Holdings  of  its   obligations   hereunder  and  the
consummation by LaSalle Holdings of the transactions  contemplated  hereby. This
Agreement and the Stock Option  Agreements have been duly executed and delivered
by LaSalle Holdings and, assuming the due authorization,  execution and delivery
hereof and thereof by Trenwick, New Holdings and Acquisition, and subject to the
provisions of Section 99 of the Companies Act constitutes  the legal,  valid and
binding obligations of LaSalle Holdings, enforceable against LaSalle Holdings in
accordance its terms,  subject with respect to  enforceability  to the effect of
bankruptcy,  fraudulent conveyance,  insolvency,  reorganization,  moratorium or
similar laws now or hereafter  affecting the  enforcement  of creditors'  rights
generally and to the availability of equitable remedies.

         (b) The Board of Directors of LaSalle  Holdings (the  "LaSalle  Board")
(i) has unanimously (by all directors present at a meeting duly called and held)
declared that it considers this  Agreement,  the Schemes of Arrangement  and the
other transactions contemplated hereby to be advisable and in the best interests
of LaSalle Holdings and its shareholders and (ii) has authorized and approved in
all respects this Agreement,  the Plans and the other transactions  contemplated
hereby.

         Section 4.3.      Capital Structure.

         (a) As of the date  hereof,  the  authorized  share  capital of LaSalle
Holdings is  $100,000,000  comprised of  100,000,000  shares with a par value of
$1.00 per share. As of December 15, 1999, (i) 15,603,652 LaSalle Holdings Shares
were  issued and  outstanding,  (ii) no  LaSalle  Holdings  Shares  were held as
treasury shares or by Subsidiaries of LaSalle Holdings and (ii) 3,000,000 Series
A Preferred Shares were issued and outstanding. In addition, there are 4,000,000
Series B Preferred  Shares of LaSalle  Holdings  reserved for issuance  pursuant



                                       35

<PAGE>




to the CatEPut,  which shares are  convertible  into  LaSalle  Holdings  Shares.
Section  4.3(a)  of  the  LaSalle   Disclosure  Letter  sets  forth  each  plan,
arrangement or agreement pursuant to which options or stock appreciation  rights
with respect to LaSalle  Holdings  Shares or shares of LaSalle Re may be granted
or under which such options or stock  appreciation  rights have been granted and
are  outstanding  (the "LaSalle  Option Plans") and in the aggregate the maximum
number of  options  and stock  appreciation  rights  outstanding  as of the date
hereof and the class and number of LaSalle  Holdings Shares or shares of LaSalle
Re reserved for issuance  pursuant to the plan,  arrangement or agreement  (such
options  and  rights  being  herein  collectively  referred  to as the  "LaSalle
Holdings  Options" and the  "LaSalle Re Options," as the case may be),  together
with a listing of the  aggregate  number of such  LaSalle  Holdings  Options and
LaSalle Re Options  which  shall vest at the  Effective  Time as a result of the
Schemes of  Arrangement.  Except as set forth in Section  4.3(a) of the  LaSalle
Disclosure Letter,  each of the outstanding shares of each Subsidiary of LaSalle
Holdings,  other than the Non-Voting Shares owned by the Minority  Shareholders,
is  directly  or  indirectly  owned by LaSalle  Holdings,  free and clear of all
Liens.


         (b) Except as  described  in Section  4.3(b) of the LaSalle  Disclosure
Letter,  as of the date hereof, no Voting Debt of LaSalle Holdings or any of its
Subsidiaries is issued or outstanding.

         (c) Except as  described in Section  4.3(a),  (b) or (c) of the LaSalle
Disclosure Letter, as of the date hereof, there are no options, warrants, calls,
rights,  commitments or agreements of any character to which LaSalle Holdings or
any of its  Subsidiaries is a party or by which any of them is bound  obligating
LaSalle Holdings or any of its Subsidiaries to issue,  deliver or sell, or cause
to be  issued,  delivered  or sold,  additional  shares  or any  Voting  Debt or
obligating LaSalle Holdings or any of its Subsidiaries to grant, extend or enter
into any such option, warrant, call, right,  commitment or agreement.  Except as
set forth in this  Agreement  or in  Section  4.3(c) of the  LaSalle  Disclosure
Letter, as of the date hereof, there are no outstanding  contractual obligations
of  LaSalle  Holdings  or any of  its  Subsidiaries  to  repurchase,  redeem  or
otherwise acquire any shares of LaSalle Holdings or any of its Subsidiaries.

         (d) Except as  described  in Section  4.3(d) of the LaSalle  Disclosure
Letter or as  specifically  described in this Agreement and except for quarterly
dividends  in an amount not in excess of $0.375 per LaSalle  Holdings  Share and
$1.0938 per Series A Preferred Share,  since June 30, 1999, LaSalle Holdings has
not (i) made or agreed to make any share split or share  dividend,  or issued or
permitted or agreed to permit to be issued any shares, or securities exercisable
for or convertible  into shares,  of LaSalle Holdings other than pursuant to and
as required  by the terms of any  LaSalle  Holdings  Option;  (ii)  repurchased,
redeemed  or  otherwise  acquired  any  shares  of  LaSalle  Holdings;  or (iii)
declared,  set  aside,  made or paid to the  shareholders  of  LaSalle  Holdings
dividends or other distributions on the outstanding shares of LaSalle Holdings.

         (e) Except as  described  in Section  4.3(e) of the LaSalle  Disclosure
Letter or as  specifically  described in this Agreement and except for quarterly
dividends  in  an  amount not in excess of  $0.375  per  Minority  Share,  since



                                       36

<PAGE>



June 30, 1999,  LaSalle Re has not (i) made or agreed to make any share split or
share  dividend,  or issued or  permitted  or agreed to permit to be issued  any
shares, or securities  exercisable for or convertible into shares, of LaSalle Re
other than  pursuant  to and as  required by the terms of any LaSalle Re Option;
(ii)  repurchased,  redeemed or otherwise  acquired any shares of LaSalle Re; or
(iii) declared, set aside, made or paid to the shareholders of LaSalle Re (other
than LaSalle  Holdings)  dividends  or other  distributions  on the  outstanding
shares of LaSalle Re.

         Section 4.4.      SEC  Reports; Financial  Statements.   Except as  set
forth in Section 4.4 of the LaSalle Disclosure Letter,

         (a) LaSalle Holdings has delivered or made available to Trenwick a true
and  complete  copy  of  each  report,  schedule,   registration  statement  and
definitive proxy statement or information  statement  (including exhibits) filed
by LaSalle Holdings with the SEC in respect of its fiscal years ending September
30, 1997 and 1998 and its  quarters  ending after  September  30, 1998 under the
Securities  Act and the Exchange Act and will deliver to Trenwick  promptly upon
the  filing  thereof  with the SEC all  such  reports,  schedules,  registration
statements and proxy statements  (including  exhibits) as may be filed after the
date hereof and prior to the Effective  Time (as such  documents  have since the
time of their filing been amended or may after their  filing,  if after the date
hereof,  be amended,  the "LaSalle SEC  Reports"),  which are or will be all the
documents  that  LaSalle  Holdings was or will be required to file with the SEC.
Except as disclosed in Section 4.4(a) of the LaSalle  Disclosure  Letter,  as of
their  respective  dates, the LaSalle SEC Reports complied or will comply in all
material  respects with the  requirements  of the Securities Act or the Exchange
Act,  as the case may be, and the rules and  regulations  of the SEC  thereunder
applicable  to the  LaSalle  SEC  Reports,  and none of the  LaSalle SEC Reports
contained or will contain any untrue  statement of a material fact or omitted or
will omit to state a material fact required to be stated therein or necessary to
make the statements therein, in light of the circumstances under which they were
made or will be made, not misleading.

         (b) As of their respective  dates, the financial  statements of LaSalle
Holdings  included or to be included  in the LaSalle SEC Reports  (the  "LaSalle
Financial  Statements")  complied  or will  comply  as to  form in all  material
respects with applicable  accounting  requirements  and with the published rules
and  regulations  of the SEC with  respect  thereto and present or will  present
fairly in all material respects the consolidated  financial  position of LaSalle
Holdings  and its  Subsidiaries  and the  consolidated  results  of  operations,
changes in  shareholders'  equity and cash  flows of  LaSalle  Holdings  and its
Subsidiaries as of the dates and for the periods  indicated,  in accordance with
GAAP applied on a  consistent  basis,  subject in the case of interim  financial
statements to normal year-end  adjustments and except for the absence of certain
footnote information in the unaudited statements.

         (c)  Except as set forth in, or arising  out of facts or  circumstances
disclosed in, filings by LaSalle Holdings with the SEC prior to the date hereof,
LaSalle  Holdings and its  Subsidiaries  have no liabilities,  debts,  claims or
obligations of any nature on the date hereof, whether accrued,  absolute, direct
or indirect,  contingent or otherwise,  whether due or to become due, that would
be required  to be  included  on a balance  sheet  prepare  in  accordance  with



                                       37

<PAGE>


GAAP  ("LaSalle  Liabilities"),  and there is no  existing  condition  or set of
circumstances  which  would  reasonably  be  expected  to  result  in a  LaSalle
Liability, except for (i) LaSalle Liabilities incurred in the ordinary and usual
course of business and consistent  with past practice since June 30, 1998,  (ii)
LaSalle  Liabilities  incurred  in  connection  with  or  as  a  result  of  the
transactions  contemplated by this Agreement and (iii) LaSalle  Liabilities that
would not  reasonably be expected to have a Material  Adverse  Effect on LaSalle
Holdings.

         Section 4.5.      Absence  of  Certain  Changes  or  Events.  Except in
connection with this Agreement,  the Plans, the Stock Option  Agreements and the
transactions  contemplated  hereby and thereby,  as disclosed in the LaSalle SEC
Reports filed and publicly  available  prior to the date of this  Agreement (the
"Filed LaSalle SEC Reports") since the date of the most recent audited financial
statements  included in the Filed LaSalle SEC Reports,  LaSalle Holdings and its
Subsidiaries  have conducted  their business in the ordinary  course  consistent
with past  practice,  and there has not occurred (i) any event or change  having
individually or in the aggregate a Material Adverse Effect on LaSalle  Holdings,
(ii)  any  declaration,  setting  aside  or  payment  of any  dividend  or other
distribution (whether in cash, stock or property) with respect to any of LaSalle
Holdings's  outstanding capital stock, other than regular quarterly dividends in
an amount payable in cash not in excess of $1.0938 per Series A Preferred  Share
and quarterly dividends in an amount payable in cash not in excess of $0.375 per
LaSalle Holdings Share,  Voting Share and Non-Voting Share and dividends paid by
wholly owned Subsidiaries,  (iii) (A) any granting by LaSalle Holdings or any of
its  Subsidiaries  to any  current  or former  director  or  officer  of LaSalle
Holdings or its  Subsidiaries  of any increase in  compensation,  bonus or other
benefits,  except for normal  increases in the ordinary course of business,  (B)
any granting by LaSalle  Holdings or any of its Subsidiaries to any such current
or former director or officer of any increase in severance or termination pay or
(C) any  entry by  LaSalle  Holdings  or any of its  Subsidiaries  into,  or any
amendments of, any employment,  deferred  compensation,  consulting,  severance,
termination  or  indemnification  agreement  with any  such  current  or  former
director or officer, (iv) any tax election that individually or in the aggregate
would  have a Material  Adverse  Effect on  LaSalle  Holdings  or any of its tax
attributes or any settlement or compromise of any material income tax liability,
or (v) any change in  accounting  methods,  principles  or  practices by LaSalle
Holdings  or  any  of  its  Subsidiaries   materially  affecting  their  assets,
liabilities  or business,  except insofar as may have been required or permitted
by a change in applicable accounting principles (including SAP).

         Section 4.6.      Certain Fees.  No finder,   broker, agent,  financial
advisor or other intermediary, other than Lazard Freres & Co. LLC, Salomon Smith
Barney Inc. and Aon Capital Markets, have acted on behalf of LaSalle Holdings in
connection  with this Agreement or the  transactions  contemplated  hereby or is
entitled to any payment in connection herewith. LaSalle Holdings has provided to
Trenwick copies of LaSalle Holdings' engagement letters with Lazard Freres & Co.
LLC,  Salomon Smith Barney Inc. and Aon Capital  Markets in connection with this
Agreement and the transactions contemplated hereby.

         Section  4.7.     No  Defaults. Neither LaSalle Holdings nor any of its
Subsidiaries  is in default or violation  (and no event has occurred  which with
notice or lapse of time or both would  constitute a default or violation) of its
memorandum  of  association  or  bye-laws  or other  governing  document  or any
material agreement,  mortgage,  indenture,  debenture,  trust, lease, license or



                                       38

<PAGE>





other  instrument or  obligation  to or by which it or any of its  properties is
subject or bound  (the  "LaSalle  Instruments"),  except  for such  defaults  or
violations as would not reasonably be expected to have,  individually  or in the
aggregate, a Material Adverse Effect on LaSalle Holdings. Except as set forth in
Section  4.7 of the LaSalle  Disclosure  Letter,  the  execution,  delivery  and
performance of this Agreement and the taking of any other action contemplated by
this Agreement will not (i) result in any violation of or be in conflict with or
constitute a breach or default (with or without notice or lapse of time or both)
under (a) the memorandum of  association or bye-laws of LaSalle  Holdings or its
Subsidiaries  or (b) any of the other LaSalle  Instruments,  except for any such
violation  of,  conflict  with,  breach  of or  default  under  which  would not
reasonably be expected to have,  individually  or in the  aggregate,  a Material
Adverse  Effect on  LaSalle  Holdings,  (ii)  result in or  constitute  an event
entitling any party to a LaSalle  Holdings  Instrument to effect an acceleration
of  the  maturity  of  any  indebtedness  of  LaSalle  Holdings  or  any  of its
Subsidiaries  or an increase in the rate of  interest  presently  in effect with
respect to such  indebtedness,  except for any such  accelerations  or increases
which  would  not  reasonably  be  expected  to  have,  individually  or in  the
aggregate,  a Material Adverse Effect on LaSalle Holdings or (iii) result in the
creation of any Lien upon any of the  properties or assets of LaSalle  Holdings,
except for Permitted  Liens and any Liens which would not reasonably be expected
to have,  individually or in the aggregate, a Material Adverse Effect on LaSalle
Holdings.

         Section  4.8.     Consents.  Except as set forth in Section  4.8 of the
LaSalle  Disclosure  Letter and except for  compliance  with the  provisions  of
Section 99 of the  Companies  Act, the  approval of Lloyd's,  the consent of the
Court to the Plans and the  filing of the order or orders of the Court  pursuant
to Section 2.2 of this Agreement,  no Consent is required on the part of LaSalle
Holdings or any of its  Subsidiaries in connection with the execution,  delivery
and  performance by LaSalle  Holdings of this Agreement and the  consummation by
LaSalle Holdings of the transactions  contemplated hereby, except those required
by (i) compliance  with any applicable  requirements of the HSR Act, (ii) United
States  federal and state  securities or "Blue Sky" laws and (iii) where failure
to obtain  such  Consent  would not  reasonably  be  expected to have a Material
Adverse Effect on LaSalle Holdings.

         Section 4.9.  Compliance with Applicable Law. Each of LaSalle  Holdings
and its  Subsidiaries  is in  compliance  with all  licenses,  permits and other
authorizations,  domestic  or  foreign,  necessary  to  conduct  its  respective
business, except where failure to have or comply with such licenses, permits and
authorizations would not reasonably be expected to have,  individually or in the
aggregate,  a Material  Adverse  Effect on  LaSalle  Holdings.  Neither  LaSalle
Holdings nor any of its  Subsidiaries  is in default or violation  (and no event
has occurred  which with notice or the lapse of time or both would  constitute a
default or violation) of any judgment,  decree,  order,  law,  statute,  rule or
regulation of any Governmental Authority, except for such defaults or violations
as would not reasonably be expected to have, individually or in the aggregate, a
Material Adverse Effect on LaSalle  Holdings.  Subject to obtaining the Consents
referred to in Section 4.8, the  execution,  delivery  and  performance  of this
Agreement by LaSalle  Holdings and the  consummation by LaSalle  Holdings of the
transactions  contemplated  hereby  prior to the  date or dates as of which  the
representations  and warranties  herein are made or deemed made, will not result
in any default or violation of any judgment,  decree,  order, law, statute, rule
or regulation of any  Governmental  Authority  applicable to LaSalle Holdings or
its Subsidiaries, except for such defaults or violations as would not reasonably
be expected to have, individually or in the aggregate, a Material Adverse Effect
on LaSalle Holdings.


                                       39

<PAGE>

         Section 4.10.      Information  Supplied.  None  of   the   information
supplied or to be supplied by LaSalle Holdings for inclusion or incorporation by
reference in the Form S-4 to be filed with the SEC by New  Holdings  relating to
the  New  Holdings  Shares   comprising   LaSalle   Consideration  and  Trenwick
Consideration  will, at the time the Form S-4 is filed with the SEC, at any time
it is amended or  supplemented  or at the time it  becomes  effective  under the
Securities Act, contain any untrue statement of a material fact or omit to state
any  material  fact  required  to be stated  therein  or  necessary  to make the
statements  therein,  in light of the circumstances  under which such statements
were made, not  misleading.  The letters to  shareholders,  notices of meetings,
proxy  statements  and forms of proxies to be  distributed  to  shareholders  of
LaSalle Holdings and stockholders of Trenwick,  respectively, in connection with
the Plans and the transactions  contemplated hereby, except information supplied
by Trenwick in writing for inclusion in the Joint Proxy Statement,  will not, as
of the date the Joint Proxy Statement is first mailed to such  shareholders  and
on the date of the  meetings of LaSalle  Holdings'  shareholders  or  Trenwick's
stockholders,  as  the  case  may  be,  and  the  date  of any  postponement  or
adjournment thereof,  contain any untrue statement of a material fact or omit to
state any material fact  required to be stated  therein or necessary in order to
make the statements therein, in light of the circumstances under which they were
made, not  misleading.  All documents that LaSalle  Holdings is responsible  for
filing with any  Governmental  Authority  in  connection  with the  transactions
contemplated  hereby will comply as to form in all  material  respects  with the
provisions of any applicable law.

         Section 4.11.     Material Contracts.  Except  as set forth in  Section
4.11 of the LaSalle Disclosure Letter:

         (a) All of the contracts of LaSalle Holdings and its Subsidiaries  that
are  required  to be  described  in the  LaSalle  SEC  Reports or to be filed as
exhibits  thereto are  described in the LaSalle SEC Reports or filed as exhibits
thereto and are in full force and effect.

         (b) Neither LaSalle  Holdings nor any of its Subsidiaries is, as of the
date  hereof,  party to any  agreement  containing  any  provision  or  covenant
limiting in any material  respect the ability of LaSalle  Holdings or any of its
Subsidiaries  (or New  Holdings  or any of its  Subsidiaries  subsequent  to the
Effective  Time) to (i) sell any products or services of or to any other Person,
(ii) engage in any line of business in any  geographical  area or (iii)  compete
with or to obtain  products or services  from any Person or limiting the ability
of any Person to provide  products or services to LaSalle Holdings or any of its
Subsidiaries.

         (c) Neither LaSalle  Holdings nor any of its Subsidiaries is a party to
or bound by any contract,  agreement or arrangement which would cause the rights
or obligations of any party thereto to change in the event of the Plans,  except
for any such contract,  agreement or  arrangement  which would not reasonably be
expected to have, individually or in the aggregate, a Material Adverse Effect on
LaSalle Holdings.


                                       40

<PAGE>

         Section 4.12.     Taxes.  Except as  provided  in Section  4.12 of  the
LaSalle Disclosure Letter:

         (a) To LaSalle Holdings' knowledge, neither LaSalle Holdings nor any of
its Subsidiaries has, nor has it had, any income which is, or has been,  subject
to the United States federal income tax as income which is effectively connected
with the conduct of a trade or  business  within the United  States,  within the
meaning of Section 882(a)(1) of the Code.  LaSalle Holdings and its Subsidiaries
have filed or caused to be filed with the  appropriate  United  States  federal,
state,  local,  foreign and other  Governmental  Authorities,  all Tax  returns,
information  returns  and  reports  required to be filed on or prior to the date
hereof  (taking  into  account  all  valid  extensions).  All such Tax  returns,
information  returns and  reports  are  complete  and  accurate in all  material
respects.

         (b) LaSalle  Holdings  and its  Subsidiaries  have paid in full or made
adequate  provision (in accordance with GAAP) for the payment of all Taxes shown
to be due on the Tax  returns  referred  to in  Section  4.12(a).  All  material
written assessments of Taxes due and payable by or on behalf of LaSalle Holdings
or any of its Subsidiaries  have either been paid or provided for (in accordance
with GAAP) or are being contested in good faith by appropriate proceedings.

         (c) There are no material Tax claims pending against  LaSalle  Holdings
or any of its  Subsidiaries and LaSalle Holdings does not know of any threatened
claim for Tax deficiencies or any basis for such claims, no material issues have
been raised in any  examination by any taxing  authority with respect to LaSalle
Holdings or any of its Subsidiaries which, by application of similar principles,
reasonably  could be expected to result in a proposed  deficiency  for any other
period not so examined, and there are not now in force any waivers or agreements
by LaSalle Holdings or any of its Subsidiaries for the extension of time for the
assessment  of any  material  Tax,  nor has any such  waiver or  agreement  been
requested  by any taxing  authority.  Neither  LaSalle  Holdings  nor any of its
Subsidiaries  has any liability for any material United States  federal,  state,
local,  foreign or other Taxes of any  corporation  or entity other than LaSalle
Holdings and its Subsidiaries.

         (d) There are no Liens on any of the assets of LaSalle  Holdings or any
of its  Subsidiaries  that arose in  connection  with any  failure  (or  alleged
failure)  to pay any Taxes  (other  than  Taxes  that are not due as of the date
hereof).

         (e) LaSalle  Holdings and its  Subsidiaries  have withheld and paid all
United States federal,  state,  local,  foreign and other Taxes required to have
been withheld and paid in connection with amounts paid or owing to any employee,
independent contractor, creditor, stockholder or other third party.

         (f) To LaSalle  Holdings'  knowledge,  Section  4.12(f) of the  LaSalle
Disclosure Letter  discloses,  with respect to the year ended September 30, 1998
and for the  period  commencing  October  1, 1998 and  ending on the date of the
LaSalle  Disclosure  Letter,  (i) each insurance or  reinsurance  transaction by
LaSalle  Holdings  or any of its  Subsidiaries  directly  with  shareholders  of
LaSalle  Holdings and (ii) each insurance or reinsurance  transaction by LaSalle
Holdings or any of its Subsidiaries  directly or indirectly with Persons related
to shareholders of LaSalle Holdings and not disclosed in clause (i) above, which
would cause  LaSalle  Holdings or any of its  Subsidiaries  to have any "related
person insurance income" within the meaning of Section 953(c)(2) of the Code.

                                       41

<PAGE>



         (g)  To  LaSalle   Holdings'   knowledge,   LaSalle  Holdings  and  its
Subsidiaries  did not have for the year ended  September  30, 1998,  and LaSalle
Holdings does not expect LaSalle Holdings or any of its Subsidiaries to have for
the period ending at the Effective  Time  (treating  such period as if it were a
taxable year),  "related person insurance  income" within the meaning of Section
953(c)(2)  of  the  Code  in  excess  of the  exceptions  provided  in  Sections
953(c)(3)(A) and (B) of the Code.

         (h) To LaSalle Holdings' knowledge, neither LaSalle Holdings nor any of
its Subsidiaries  is, nor has LaSalle  Holdings or any of its Subsidiaries  ever
been, a "controlled foreign corporation" within the meaning of Section 957(a) or
957(b) of the Code.

         (i) A  representation  with respect to Taxes  contained in this Section
4.12 shall be deemed to be accurate unless an inaccuracy contained therein would
reasonably be expected to have,  individually  or in the  aggregate,  a Material
Adverse Effect on LaSalle Holdings.

         Section  4.13.    Litigation.  Except as disclosed in the  LaSalle  SEC
Reports  filed  prior to the  date  hereof  or in  Section  4.13 of the  LaSalle
Disclosure  Letter,  there  are  no  actions,  suits,  claims,   proceedings  or
investigations  pending  against  or,  to the  knowledge  of  LaSalle  Holdings,
threatened against or affecting,  LaSalle Holdings or any of its Subsidiaries or
any  of  their  respective  properties  before  any  Governmental  Authority  or
otherwise which (a) would be expected to have, individually or in the aggregate,
a Material Adverse Effect on LaSalle  Holdings,  (b) in any manner challenges or
seeks to prevent, enjoin, alter or delay the transactions contemplated hereby or
(c) alleges criminal action or inaction. As of the date hereof,  neither LaSalle
Holdings nor its Subsidiaries or any of their  respective  properties is subject
to any order, writ, judgment, injunction, decree, determination or award having,
or which would  reasonably  be expected to have,  a Material  Adverse  Effect on
LaSalle  Holdings  or which  would  prevent  or delay  the  consummation  of the
transactions contemplated hereby. Except as disclosed in the LaSalle SEC Reports
filed prior to the date  hereof,  there are no pending or, to the  knowledge  of
LaSalle Holdings,  threatened claims for  indemnification by LaSalle Holdings or
any of its Subsidiaries in favor of directors, officers, employees and agents of
LaSalle Holdings or any of its Subsidiaries.

         Section 4.14.     Title to Properties; Leases.  Except as set forth in
Section 4.14(a) of the LaSalle Disclosure  Letter,  each of LaSalle Holdings and
its  Subsidiaries  has good and marketable title to, and is the lawful owner of,
or has the right to use pursuant to a license or otherwise, all of  the tangible


                                       42

<PAGE>



and  intangible  assets,  properties  and rights used in its  businesses and all
tangible and intangible  assets,  properties and rights reflected on the balance
sheet of LaSalle  Holdings  dated June 30, 1999 or acquired since June 30, 1999,
free and clear of all Liens (other than Permitted  Liens) and material  defects.
LaSalle Holdings and its  Subsidiaries own no real property.  Section 4.14(c) of
the LaSalle Disclosure Letter sets forth all material real property and personal
property leases of LaSalle  Holdings and its  Subsidiaries.  All such leases are
valid,  binding and  enforceable  against LaSalle  Holdings or its  Subsidiaries
(and,  to the  knowledge of LaSalle  Holdings and its  Subsidiaries,  each other
party thereto) in accordance  with their  respective  terms,  and there does not
exist,  under any lease of real  property or  personal  property,  any  material
defect  or any  event  which,  with  notice  or  lapse  of time or  both,  would
constitute a material  default by the LaSalle Holdings or its  Subsidiaries,  as
the case may be, or, to the knowledge of LaSalle Holdings and its  Subsidiaries,
by any other party thereto.

         Section 4.15.     Approval of Schemes of  Arrangement.  Other  than (a)
the affirmative  vote of the holders of at least  seventy-five  percent (75%) of
the LaSalle Holdings Shares that are represented and voted,  either in person or
by proxy, at the shareholder meeting and class meeting called for the purpose of
approving  and  adopting  this  Agreement  and the  LaSalle  Holdings  Scheme of
Arrangement, which holders must also constitute a majority of the record holders
who are present and voting,  either in person or by proxy, at each such meeting,
and (b) the  affirmative  vote of the holders of at least  seventy-five  percent
(75%) of the Non-Voting Shares that are represented and voted,  either in person
or by proxy, at the shareholder meeting and class meeting called for the purpose
of  approving  and  adopting  this  Agreement  and  the  LaSalle  Re  Scheme  of
Arrangement, which holders must also constitute a majority of the record holders
who are present and voting,  either in person or by proxy, at each such meeting,
there is no other  vote,  consent  or  approval  of the  holders of any class of
shares of LaSalle  Holdings  or LaSalle Re  necessary  to approve and adopt this
Agreement, the Schemes of Arrangement and the transactions contemplated hereby.

         Section 4.16.     Employees.

         (a) Section 4.16(a) of the LaSalle  Disclosure  Letter lists, as of the
date hereof, all employment  contracts and similar  arrangements between LaSalle
Holdings or any of its Subsidiaries and their respective  executive officers and
all plans and  arrangements  pursuant  to which  LaSalle  Holdings or any of its
Subsidiaries  is obligated  to make any payment or confer any  material  benefit
upon any officer, director,  employee or agent of LaSalle Holdings or any of its
Subsidiaries  as a  result  of or in  connection  with  any of the  transactions
contemplated by this Agreement or any transaction or transactions resulting in a
change of control of LaSalle Holdings or any of its Subsidiaries (including as a
result of a termination  of  employment in connection  with any of such events).
Except as  described  in Section  4.16(a) of the LaSalle  Disclosure  Letter and
except as would not reasonably be expected to have a Material  Adverse Effect on
LaSalle  Holdings,  (i) LaSalle Holdings and its Subsidiaries have complied with
all laws  relating to the  employment  of labor,  including  provisions  thereof
relating to wages, hours, equal opportunity and collective  bargaining,  (ii) no
labor  dispute  with  employees of LaSalle  Holdings or any of its  Subsidiaries
exists or, to the  knowledge  of LaSalle  Holdings,  is  threatened,  (iii) each
Employee Benefit Plan maintained by LaSalle Holdings or any of its  Subsidiaries



                                       43

<PAGE>



(each a "LaSalle Employee Benefit Plan") conforms to, and its  administration is
in conformity with, all applicable laws, no liability has been or is expected to
be incurred by LaSalle Holdings or any of its  Subsidiaries  with respect to any
LaSalle Employee Benefit Plan,  except as expressly  provided by such plan, (iv)
no LaSalle  Employee  Benefit Plan is subject to ERISA, (v) LaSalle Holdings has
made  available  to  Trenwick  a true and  correct  copy of each of the  LaSalle
Employee  Benefit Plans and all  applicable  trust  agreements and all contracts
relating  thereto or to the funding  thereof,  (vi) all LaSalle Employee Benefit
Plans intended to satisfy  applicable Tax qualification  requirements,  or other
requirements necessary to secure favorable Tax or other legal treatment,  comply
in all material  respects with such requirements and (vii) adequate accruals for
all obligations  under the LaSalle  Employee  Benefit Plans are reflected in the
LaSalle  Financial  Statements.  Except as described  in Section  4.16(a) of the
LaSalle  Disclosure  Letter,  no  agreement,  contract or  arrangement  to which
LaSalle Holdings or any of its Subsidiaries is a party would result in a payment
that would not be deductible as a result of Section 280G of the Code.

         (b) Except as set forth in Section  4.16(b) of the  LaSalle  Disclosure
Letter,  neither LaSalle  Holdings nor any of its Subsidiaries is a party to any
collective  bargaining  or other  labor  union  contract  applicable  to Persons
employed  by  LaSalle  Holdings  or  any  of  its  Subsidiaries,  no  collective
bargaining  agreement  is being  negotiated  by LaSalle  Holdings  or any of its
Subsidiaries  and  LaSalle  Holdings  has  no  knowledge  of any  activities  or
proceedings  of any labor union to organize any of their  respective  employees.
There is no labor dispute,  strike or work stoppage  against LaSalle Holdings or
any of its Subsidiaries pending or, to LaSalle Holdings'  knowledge,  threatened
which may interfere with the respective  business activities of LaSalle Holdings
or any of its Subsidiaries,  except where such dispute,  strike or work stoppage
would not  reasonably be expected to have a Material  Adverse  Effect on LaSalle
Holdings.

         (c)  Except  as  disclosed  in  the  Section  4.16(c)  of  the  LaSalle
Disclosure  Letter,  the  consummation  of the  Schemes of  Arrangement  (or the
approval  thereof  by  the  parties'  respective  shareholders)  and  the  other
transactions  contemplated by this Agreement, will not (x) entitle any employees
or directors of LaSalle or of any LaSalle Holdings Commonly  Controlled  Entity,
directly or indirectly to severance  pay; (y)  accelerate the time of payment or
vesting or trigger any payment of  compensation  or benefits  under, or increase
the amount payable or trigger any other material  obligation pursuant to, any of
the  LaSalle  Benefit  Plans;  or (z) result in any breach or  violation  of, or
default under any of the LaSalle Benefit Plans.

         Section  4.17.    Intellectual   Property.  LaSalle  Holdings  and  its
Subsidiaries  own or possess,  or have all necessary rights and licenses in, all
Intellectual  Property  necessary to conduct  their  business as  conducted  and
proposed  to be  conducted  except to the  extent  that the  failure  of LaSalle
Holdings or its  Subsidiaries  to own or have such  rights and  licenses in such
Intellectual  Property  would not  reasonably  be  expected  to have a  Material
Adverse  Effect on LaSalle  Holdings.  Neither  LaSalle  Holdings nor any of its
Subsidiaries  have received any unresolved notice of, or is aware of any fact or
circumstance  that  would give any  Person a right to  assert,  infringement  or
misappropriation  of, or conflict with,  asserted rights of others or invalidity
or  unenforceability  of any Intellectual  Property owned by LaSalle Holdings or
any of its Subsidiaries with respect to any of the foregoing which, singly or in
the aggregate, would reasonably be expected to have a Material Adverse Effect on
LaSalle  Holdings.  To the  knowledge  of  LaSalle  Holdings,  the  use of  such
Intellectual Property to conduct the business and operations of LaSalle Holdings
and its  Subsidiaries as conducted or proposed to be conducted does not infringe
on the rights of any person in any case where such infringement would reasonably
be  expected  to have a  Material  Adverse  Effect on LaSalle  Holdings.  To the
knowledge  of  LaSalle  Holdings, no  person is  challenging,  infringing on  or




                                       44

<PAGE>



or otherwise  violating any right of LaSalle Holdings or any of its Subsidiaries
with respect to any  Intellectual  Property owned by and/or  licensed to LaSalle
Holdings or any of its Subsidiaries.  Except as set forth in Section 4.17 of the
LaSalle  Disclosure  Letter,  neither the  execution  of this  Agreement  or the
LaSalle  Stock  Option  Agreement  nor  the  consummation  of  the  transactions
contemplated hereby or thereby will result in a loss or limitation in the rights
and licenses of LaSalle Holdings to use or enjoy the benefit of any Intellectual
Property  employed by LaSalle  Holdings or any of its Subsidiaries in connection
with its business as  conducted  or proposed to be conducted  where such loss or
limitation,  individually or in the aggregate,  would  reasonably be expected to
have a Material  Adverse  Effect on LaSalle  Holdings.  Following  the Effective
Date, LaSalle Holdings  Intellectual Property may be used by New Holdings or any
of its  Subsidiaries,  except to the  extent  that  failure to be so able to use
LaSalle's  Intellectual Property would not have a Material Adverse Effect on New
Holdings or any of its Subsidiaries.

         Section  4.18.    Takeover  Statutes.  No  "fair  price," "moratorium,"
"control share acquisition" or other similar anti-takeover statute or regulation
enacted  under any  Bermuda law is  applicable  to the Plans,  the Stock  Option
Agreements or the other transactions contemplated hereby or thereby.

         Section  4.19.    Opinions of Financial Advisors. The LaSalle Board has
received  the  separate  opinions of Lazard  Freres & Co. LLC and Salomon  Smith
Barney Inc.,  dated  December 16, 1999, to the effect that, as of such date, the
LaSalle  Exchange Ratio is fair to the holders of LaSalle Holdings Shares from a
financial  point  of view,  copies  of the  written  opinions  of which  will be
delivered to Trenwick.

         Section 4.20.     Insurance Matters.

         (a) All insurance,  reinsurance and coinsurance treaties or agreements,
including  retrocessional  agreements,  to which LaSalle Holdings or any LaSalle
Holdings  Reinsurance  Subsidiary is a party or under which LaSalle  Holdings or
any LaSalle Holdings Reinsurance Subsidiary has any existing rights, obligations
or  liabilities  are in full  force and  effect,  except  for such  treaties  or
agreements  the  failure  to be in  full  force  and  effect  of  which  are not
reasonably  expected  to have,  individually  or in the  aggregate,  a  Material
Adverse Effect on LaSalle Holdings.

         (b) Prior to the date hereof,  LaSalle  Holdings has  delivered or made
available  to Trenwick a true and  complete  copy of the most  recent  actuarial
reports prepared by actuaries, independent or otherwise, with respect to LaSalle
Holdings or any LaSalle Holdings Reinsurance Subsidiary since September 30, 1998
and  all  attachments,  addenda,  supplements  and  modifications  thereto  (the
"LaSalle  Actuarial  Analyses").  The  information and data furnished by LaSalle
Holdings or any  LaSalle  Holdings  Reinsurance  Subsidiary  to its  independent
actuaries in connection with the preparation of the LaSalle  Actuarial  Analyses
were accurate in all material respects.

         (c) LaSalle Re does not currently  issue and has not issued any primary
insurance policies in the United States.


                                       45

<PAGE>


         Section 4.21.     Liabilities and Reserves.

         Except for instances  where the failure of the following  statements to
be true would not  reasonably be expected to have a Material  Adverse  Effect on
LaSalle Holdings,  (a) the reserves carried on the financial  statements of each
LaSalle  Holdings  Reinsurance  Subsidiary for future insurance policy benefits,
losses,  claims and similar  purposes were, as of the  respective  dates of such
financial   statements,   in  compliance  with  the  requirements  for  reserves
established  by the insurance  departments of the  jurisdiction  of such LaSalle
Holdings  Reinsurance  Subsidiary  or (as  the  case  may be) by  Lloyd's,  were
determined  in  accordance  with  generally  accepted  actuarial  standards  and
principles consistently applied, and were fairly stated in accordance with sound
actuarial and  statutory  accounting  principles  (it being  understood  that no
representation  or  warranty is made in this  Agreement  to the effect that such
reserves were in fact adequate to cover the actual  amount of  liabilities  that
are eventually paid after the date hereof);  and (b) the admitted assets of each
LaSalle Holdings  Reinsurance  Subsidiary as determined under applicable laws or
under Lloyd's regulations are in an amount at least equal to the minimum amounts
required by applicable laws or regulations.

         Section 4.22.  Investment Company.  Neither LaSalle Holdings nor any of
its Subsidiaries conducts activities of, or is otherwise deemed under applicable
law to  control,  an  "investment  adviser"  as such term is  defined in Section
2(a)(20) of the  Investment  Company Act,  whether or not  registered  under the
Investment Advisers Act. Neither LaSalle Holdings nor any of its Subsidiaries is
an "investment  company" as defined under the Investment Company Act and neither
LaSalle Holdings nor any of its Subsidiaries sponsors any Person that is such an
investment company.

         Section 4.23.     Reinsurance Contracts, Coverholders and MGAs.

         (a) Section 4.23 of the LaSalle  Disclosure  Letter contains a true and
complete list of all MGAs and coverholders  with whom each Subsidiary of LaSalle
Holdings does business  that have been  appointed  within the twelve (12) months
preceding  the date of this  Agreement  and all in force  Reinsurance  Contracts
which generate  premium income in excess of $1,000,000 to which each  Subsidiary
of LaSalle  Holdings is a party as the cedent  thereunder or by or to which each
Subsidiary of LaSalle Holdings is bound or subject as the cedent thereunder,  as
each such Reinsurance Contract may have been amended,  modified or supplemented.
Except as would not,  individually or in the aggregate,  have a Material Adverse
Effect on LaSalle Holdings:  (i) each of the foregoing  Reinsurance Contracts is
valid and binding in accordance with its terms,  and is in full force and effect
and (ii) neither the  Subsidiaries of LaSalle  Holdings nor, to the knowledge of
LaSalle Holdings,  or other party thereto, is in default in any material respect
with respect to any such Reinsurance  Contract,  nor to the knowledge of LaSalle
Holdings  does any  condition  exist  that with  notice or lapse of time or both
would  constitute  such a material  default  thereunder.  Except as set forth in
Section 4.23 of the LaSalle Disclosure Letter,  none of the contracts,  treaties
or arrangements involving the MGAs or coverholders which generate premium income
in excess of  $1,000,000  with whom each  Subsidiary  of LaSalle  Holdings  does
business contain "change of control" provisions and no such Reinsurance Contract
contains  any  provision  providing  that  any  such  other  party  thereto  may
terminate, cancel or commute the same by reason of the transactions contemplated
by this  Agreement  or any other  provision  which would be altered or otherwise
become applicable by reason of such transactions,  and no party has given notice
of termination,  cancellation or commutation of any such Reinsurance Contract or
that it intends to terminate, cancel or commute any such Reinsurance Contract as
a result of the transactions contemplated hereby.


                                       46

<PAGE>


         (b)  Except  as set forth in  Section  4.23 of the  LaSalle  Disclosure
Letter,  LaSalle Re is  entitled  under  applicable  insurance  laws,  rules and
regulations to take credit in its statutory  financial  statements in accordance
with applicable Bermuda law as in effect on the date hereof, with respect to the
Reinsurance  Contracts listed in Section 4.23 of the LaSalle  Disclosure  Letter
and  all  such  amounts  are  properly  reflected  in  the  statutory  financial
statements  of  LaSalle  Re.  Each of  LaSalle  Holdings  and  LaSalle Re has no
knowledge of any disputes as to reinsurance or retrocessional coverage under, or
any terms of provisions of, any such Reinsurance  Contract.  To the knowledge of
LaSalle  Holdings and LaSalle Re, the financial  condition of any other party to
any such  Reinsurance  Contract  is not  impaired  to the extent  that a default
thereunder could reasonably be expected to occur.

         Section  4.24.    Derivatives. As of the date hereof, other than as set
forth in Section 4.24 of the LaSalle Disclosure Letter, neither LaSalle Holdings
nor any of its  Subsidiaries  is a party to any  futures  or  option  contracts,
swaps,  hedges or similar  instruments which,  individually or in the aggregate,
could have a Material Adverse Effect on LaSalle Holdings.

         Section  4.25.    Related  Party  Transactions. Except  as set forth in
Section 4.25 of the LaSalle Disclosure  Letter,  since June 30, 1999, there have
been no transactions, agreements, arrangements or understandings between LaSalle
Holdings and its Subsidiaries, on the one hand, and LaSalle Holdings' affiliates
(other than wholly-owned  Subsidiaries of LaSalle Holdings) or other Persons, on
the other hand, in existence as of the date hereof that are or would be required
to be  disclosed  in the  LaSalle  SEC  Reports in  accordance  with Item 404 of
Regulation S-K under the Securities Act.

         Section 4.26.     Finite  Risk  Reinsurance. Except  as  set  forth  in
Section 4.26 of the LaSalle  Disclosure  Letter,  none of LaSalle's  Reinsurance
Subsidiaries  has ceded business  pursuant to a reinsurance  agreement that does
not meet the conditions for reinsurance  accounting as provided by the Statement
of  Financial  Accounting  Standards  No. 113,  "Accounting  and  Reporting  for
Reinsurance of Short-Duration and Long-Term Contracts."


                                    ARTICLE 5

                                    COVENANTS

         Section  5.1.  Conduct of Business  of  Trenwick.  Except as  expressly
contemplated by this  Agreement,  the Stock Option  Agreements,  as set forth in
Section 5.1 of the Trenwick  Disclosure  Letter or as consented to in writing by
LaSalle Holdings,  during the period from the date of the Original  Agreement to
the Effective Time, Trenwick shall, and shall cause each of its Subsidiaries to,



                                       47

<PAGE>


conduct  its  operations  and (to the  extent  it is able to  control  them) the
operations of the syndicates  managed by the Trenwick Managing Agencies only in,
and neither Trenwick nor any of its Subsidiaries shall take any action and shall
not take any  action in  relation  to the  syndicates  managed  by the  Trenwick
Managing  Agencies (to the extent they are able to control  them) except in, the
ordinary and usual course of business and  consistent  with past  practice,  and
Trenwick and its Subsidiaries  will use all commercially  reasonable  efforts to
preserve intact their business  organization,  to keep available the services of
their officers and employees and to maintain advantageous relationships with and
the goodwill of their  customers,  business  partners and others having business
relationships with Trenwick or its Subsidiaries or the syndicates managed by the
Trenwick Managing Agencies,  as the case may be. Without limiting the generality
of the foregoing,  prior to the Effective Time,  neither Trenwick nor any of its
Subsidiaries will, except as expressly  contemplated by this Agreement,  without
the prior written consent of LaSalle Holdings:

         (a) split,  combine or  reclassify  any  shares of its  capital  stock,
declare, pay or set aside for payment any dividend or other distribution payable
in cash,  stock,  property  or  otherwise  in  respect of its  capital  stock or
directly or indirectly  redeem,  purchase or otherwise acquire any shares of any
class of  capital  stock or  other  securities,  other  than  regular  quarterly
dividends  (other than those  payable to Trenwick) in an amount  payable in cash
not in excess  of $0.26 per  share;  after the date of the  Original  Agreement,
LaSalle  Holdings and Trenwick  will  coordinate  with each other  regarding the
declaration of dividends in respect of the Trenwick  Shares and the record dates
and payment dates relating  thereto,  it being the intention of the parties that
holders of Trenwick  Shares will not receive two  dividends,  or fail to receive
one dividend,  for any single  calendar  quarter with respect to their  Trenwick
Shares and the New Holdings Shares any such holder receives in exchange therefor
in accordance with the Plans;

         (b) authorize for issuance,  issue, sell, grant, pledge,  dispose of or
encumber,  deliver or agree or commit to issue, sell, pledge or deliver (whether
through  the  issue  or  granting  of  any   options,   warrants,   commitments,
subscriptions,  rights to  purchase  or  otherwise)  any  shares of any class of
capital stock of Trenwick or any Subsidiary or any securities  convertible  into
or  exercisable  or  exchangeable  for shares of any class of  capital  stock of
Trenwick,  except as required by  agreements  as in effect as of the date of the
Original  Agreement and disclosed in Section  5.1(b) of the Trenwick  Disclosure
Letter,  or  amend  any of  the  terms  of any  such  securities  or  agreements
outstanding as of the date of the Original Agreement;

         (c) (i) incur or assume any debt, except for borrowings,  in each case,
in the ordinary course of business consistent with past practices,  (ii) assume,
guarantee,  endorse or otherwise become liable or responsible (whether directly,
contingently  or otherwise) for the  obligations of any other Person,  except in
the ordinary course of business,  (iii) make any loans or advances to any Person
other than loans or advances of  out-of-pocket  expenses  incurred in connection
with the  business  of Trenwick or its  Subsidiaries,  (iv) pledge or  otherwise
encumber shares of capital stock of Trenwick or its Subsidiaries or (v) mortgage
or pledge any of its material assets, tangible or intangible, or create any Lien
thereupon other than Permitted Liens;


                                       48

<PAGE>



         (d)  except  as may be  required  by law  or as  contemplated  by  this
Agreement,  including  Section 5.9, enter into,  adopt or amend or terminate any
bonus, profit sharing, compensation,  severance, termination, change of control,
stock option,  stock  appreciation  right,  restricted stock,  performance unit,
stock  equivalent,  stock  purchase  agreement,  pension,  retirement,  deferred
compensation,   employment,  consulting,  fringe  benefit,  severance  or  other
Employee  Benefit  Plan;  or enter  into or amend any  employment  or  severance
agreement  with any director,  officer,  employee or agent of Trenwick or any of
its Subsidiaries; or increase in any manner the salary, wages, bonus, commission
or other compensation or benefits of any director, officer, employee or agent of
Trenwick  or  any of its  Subsidiaries,  except,  (i)  in  connection  with  the
promotion of any director,  officer, employee or agent of Trenwick or any of its
Subsidiaries  or (ii) for  increases  in the  ordinary  course of  business  and
consistent  with past practice which in the aggregate do not exceed 10%; or hire
employees  at the level of Vice  President  or  above;  or pay any  benefit  not
required by any plan and arrangement as in effect as of the date of the Original
Agreement (including,  without limitation,  the granting of stock options, stock
appreciation rights or performance units);

         (e) acquire (by merger,  amalgamation,  consolidation or acquisition of
stock or assets or  otherwise)  any  corporation,  partnership,  joint  venture,
association  or other  business  organization  or  division  thereof or make any
material investment either by purchase of stock or securities,  contributions to
capital,  property transfer or acquisition  (including by lease) of any material
amount of properties  or assets of any other Person,  except for the purchase of
investment stock or securities in the ordinary course of business;

         (f) pay,  discharge or satisfy any claims,  liabilities  or obligations
(absolute,  accrued,  contingent  or otherwise)  against  Trenwick or any of its
Subsidiaries,  its  directors,  officers,  employees  or agents,  other than the
payment,  discharge  or  satisfaction  in the  ordinary  course of business  and
consistent  with past  practice  of claims for  contractual  benefits  under any
insurance  or   reinsurance   contract  under  which  Trenwick  or  any  of  its
Subsidiaries or syndicates  managed by any of its Subsidiaries is the insurer or
reinsurer;

         (g) amend or propose to amend the certificate of incorporation, by-laws
or any similar document of Trenwick or any of its Subsidiaries;

         (h) adopt a plan or  resolutions  providing for the complete or partial
liquidation,   dissolution,    amalgamation,    consolidation,    restructuring,
recapitalization or other reorganization of Trenwick or any of its Subsidiaries;

         (i) except as set forth in Section  5.1(i) of the  Trenwick  Disclosure
Letter,  enter into any new lines of  business  (other than in or related to the
insurance or  reinsurance  business) or otherwise  make material  changes to the
operation of its business or its loss reserve;

         (j) except as set forth in Section  5.1(j) of the  Trenwick  Disclosure
Letter,  sell (whether by  amalgamation,  consolidation  or  otherwise),  lease,
transfer or dispose of any material assets (including without limitation, rights
of  renewal)  outside  the  ordinary  course of  business  consistent  with past
practice  or enter into any  material  commitment  or  transaction  outside  the
ordinary course of business consistent with past practices;



                                       49

<PAGE>



         (k)  authorize  or make or  commit  to make any  capital  expenditures,
except for transactions in the ordinary course of business  consistent with past
practice (but in no event in excess of $1,000,000 in the  aggregate) or pursuant
to agreements or commitments entered into by Trenwick or any of its Subsidiaries
prior to the date of the Original Agreement;

         (l) make any Tax elections or settle or compromise any material  United
States federal,  state, local or other foreign income Tax liability, or waive or
extend the statute of limitations in respect of any such Taxes;

         (m)  except  as may be  required  as a result  of a change in law or in
GAAP, change any of the accounting principles or practices used by it;

         (n)  amend the Rights or the Rights Agreement in any manner adverse to
LaSalle Holdings;

         (o) enter into any agreement  providing for the acceleration of payment
or  performance  or other  consequence  as a result  of a change in  control  of
Trenwick or any of its Subsidiaries;

         (p) resolve,  commit or agree to take any of the  foregoing  actions or
any  action  which  would  make any  representation  or  warranty  in  Article 3
materially untrue or incorrect;

         (q)  make any  material  change  in its  retrocessional  agreements  or
arrangements,  including without limitation converting any of its funds withheld
stop loss reinsurance  agreements into another type of reinsurance  agreement or
entering  into  new  funds   withheld  stop  loss   reinsurance   agreements  or
arrangements or stop loss reinsurance  agreements or arrangements that attach at
an attachment point less than the expected loss ratio;

         (r)  make  any  material  change  in  its  reinsurance  agreements   or
arrangements;

         (s) enter into any  agreement or  arrangement  that limits or otherwise
restricts  Trenwick or any of its Subsidiaries or any successor  thereto or that
could,  after  the  Effective  Time,  limit or  restrict  New  Holdings  and its
Subsidiaries or any successor thereto, from engaging or competing in any line of
business or in any geographic area; or

         (t)  enter  into  any  new  transaction,   agreement,   arrangement  or
understanding  with any other  Persons that would be required to be disclosed in
the Trenwick SEC Reports in  accordance  with Item 404 of Schedule S-K under the
Securities Act.

         Section  5.2.  Conduct  of  Business  of  LaSalle  Holdings.  Except as
expressly contemplated by this Agreement,  the Stock Option Agreements or as set
forth in Section  5.2 of the LaSalle  Disclosure  Letter or as  consented  to in
writing by Trenwick,  during the period from the date of the Original  Agreement


                                       50

<PAGE>
to the  Effective  Time,  LaSalle  Holdings  shall,  and shall cause each of its
Subsidiaries  to, conduct its operations only in, and neither  LaSalle  Holdings
nor any of its  Subsidiaries  shall take any action  except in, the ordinary and
usual course of business and consistent with past practice, and LaSalle Holdings
and its Subsidiaries  will use all commercially  reasonable  efforts to preserve
intact their  business  organization,  to keep  available  the services of their
officers and employees and to maintain  advantageous  relationships with and the
goodwill  of their  customers,  business  partners  and others  having  business
relationships  with LaSalle  Holdings or its  Subsidiaries,  as the case may be.
Without  limiting the generality of the foregoing,  prior to the Effective Time,
neither LaSalle Holdings nor any of its Subsidiaries  will,  except as expressly
contemplated by this Agreement, without the prior written consent of Trenwick:

         (a) split, combine or reclassify any shares,  declare, pay or set aside
for payment any dividend or other distribution payable in cash, shares, property
or otherwise in respect of its shares or directly or indirectly redeem, purchase
or  otherwise  acquire  any  shares  of any  class  of  capital  stock  or other
securities,  other than regular quarterly dividends (other than those payable to
LaSalle  Holdings)  in an amount  payable in cash not in excess of  $1.0938  per
Series A Preferred  Share and quarterly  dividends in an amount  payable in cash
not in excess of $0.375 per LaSalle Holdings Share and Non-Voting  Share;  after
the  date  of  the  Original  Agreement,  LaSalle  Holdings  and  Trenwick  will
coordinate with each other  regarding the  declaration of dividends  (other than
those payable to LaSalle  Holdings) in respect of the Series A Preferred Shares,
LaSalle  Holdings  Shares and NonVoting  Shares and the record dates and payment
dates  relating  thereto,  it being the intention of the parties that holders of
LaSalle Holdings Shares and Non-Voting Shares will not receive two dividends for
any single  calendar  quarter with respect to their LaSalle  Holdings Shares and
NonVoting  Shares  and the New  Holdings  Shares  any such  holder  receives  in
exchange therefor in accordance with the Plans;

         (b) authorize for issuance,  issue, sell, grant, pledge,  dispose of or
encumber,  deliver or agree or commit to issue, sell, pledge or deliver (whether
through  the  issue  or  granting  of  any   options,   warrants,   commitments,
subscriptions,  rights to  purchase  or  otherwise)  any  shares of any class of
LaSalle  Holdings  or any  Subsidiary  or any  securities  convertible  into  or
exercisable or exchangeable for shares of any class of LaSalle Holdings,  except
as required by agreements as in effect as of the date of the Original  Agreement
and disclosed in Section 5.2(b) of the LaSalle  Disclosure  Letter, or amend any
of the terms of any such securities or agreements  outstanding as of the date of
the Original Agreement;

         (c) (i) incur or assume any debt, except for borrowings,  in each case,
in the ordinary course of business consistent with past practices,  (ii) assume,
guarantee,  endorse or otherwise become liable or responsible (whether directly,
contingently  or otherwise) for the  obligations of any other Person,  except in
the ordinary course of business,  (iii) make any loans or advances to any Person
other than loans or advances of  out-of-pocket  expenses  incurred in connection
with the  business  of LaSalle  Holdings  or its  Subsidiaries,  (iv)  pledge or
otherwise  encumber  shares  of  LaSalle  Holdings  or its  Subsidiaries  or (v)
mortgage or pledge any of its material assets, tangible or intangible, or create
any Lien thereupon other than Permitted Liens;


                                       51

<PAGE>

         (d)  except  as may be  required  by law  or as  contemplated  by  this
Agreement,  including  Section 5.9, enter into,  adopt or amend or terminate any
bonus, profit sharing, compensation,  severance, termination, change of control,
stock option,  stock  appreciation  right,  restricted stock,  performance unit,
stock  equivalent,  stock  purchase  agreement,  pension,  retirement,  deferred
compensation,   employment,  consulting,  fringe  benefit,  severance  or  other
Employee  Benefit  Plan;  or enter  into or amend any  employment  or  severance
agreement with any director,  officer,  employee or agent of LaSalle Holdings or
any of its  Subsidiaries;  or increase in any manner the salary,  wages,  bonus,
commission or other compensation or benefits of any director,  officer, employee
or  agent  of  LaSalle  Holdings  or  any of its  Subsidiaries,  except,  (i) in
connection  with the  promotion of any director,  officer,  employee or agent of
LaSalle  Holdings  or any of its  Subsidiaries  or  (ii)  for  increases  in the
ordinary  course of business and  consistent  with past  practice for  employees
below the level of Vice  President,  in the aggregate  case not to exceed 5%; or
hire employees at the level of Vice  President or above;  or pay any benefit not
required by any plan and arrangement as in effect as of the date of the Original
Agreement (including,  without limitation,  the granting of stock options, stock
appreciation rights or performance units);

         (e) acquire (by merger,  amalgamation,  consolidation or acquisition of
stock or assets or  otherwise)  any  corporation,  partnership,  joint  venture,
association  or other  business  organization  or  division  thereof or make any
material investment either by purchase of stock or securities,  contributions to
capital,  property transfer or acquisition  (including by lease) of any material
amount of properties  or assets of any other Person,  except for the purchase of
investment stock or securities in the ordinary course of business;

         (f) pay,  discharge or satisfy any claims,  liabilities  or obligations
(absolute,  accrued, contingent or otherwise) against LaSalle Holdings or any of
its Subsidiaries,  its directors,  officers, employees or agents, other than the
payment,  discharge  or  satisfaction  in the  ordinary  course of business  and
consistent  with past  practice  of claims for  contractual  benefits  under any
insurance or  reinsurance  contract  under which LaSalle  Holdings or any of its
Subsidiaries or any syndicates managed by any of its Subsidiaries is the insurer
or reinsurer;

         (g) amend or propose to amend the memorandum of  association,  bye-laws
or any similar document of LaSalle Holdings or any of its Subsidiaries;

         (h) propose to adopt a plan or  resolutions  providing for the complete
or partial liquidation, dissolution, amalgamation, consolidation, restructuring,
recapitalization  or other  reorganization  of  LaSalle  Holdings  or any of its
Subsidiaries;

         (i) except as set forth in  Section  5.2(i) of the  LaSalle  Disclosure
Letter,  enter  into  any new  lines  of  business  (whether  or not part of the
insurance  or  reinsurance  business)  or change  any policy  forms,  investment
policies or  guidelines or otherwise  make material  changes to the operation of
its business or its loss reserve;

                                       52
<PAGE>


         (j) except as set forth in  Section  5.2(j) of the  LaSalle  Disclosure
Letter,  sell (whether by  amalgamation,  consolidation  or  otherwise),  lease,
transfer or dispose of any material assets (including without limitation, rights
of  renewal)  outside  the  ordinary  course of  business  consistent  with past
practice  or enter into any  material  commitment  or  transaction  outside  the
ordinary course of business consistent with past practices;

         (k)  authorize  or make or  commit  to make any  capital  expenditures,
except for transactions in the ordinary course of business  consistent with past
practice (but in no event in excess of $350,000 in the aggregate) or pursuant to
agreements  or  commitments  entered  into  by  LaSalle  Holdings  or any of its
Subsidiaries prior to the date of the Original Agreement;

         (l) make  any Tax  elections  or  settle  or  compromise  any  material
Bermuda,  United  States  federal,  state,  local or other  foreign  income  Tax
liability,  or waive or extend the statute of limitations in respect of any such
Taxes;

         (m)  except  as may be  required  as a result  of a change in law or in
GAAP, change any of the accounting principles or practices used by it;

         (n)  enter into any agreement providing for the acceleration of payment
or  performance  or other  consequence  as a result  of a change in  control  of
LaSalle Holdings or any of its Subsidiaries;

         (o)  resolve, commit or agree to take any of the  foregoing  actions or
any  action  which  would  make any  representation  or  warranty  in  Article 4
materially untrue or incorrect;

         (p)  make any  material  change  in its  retrocessional  agreements  or
arrangements,  including without limitation converting any of its funds withheld
stop loss reinsurance  agreements into another type of reinsurance  agreement or
entering  into  new  funds   withheld  stop  loss   reinsurance   agreements  or
arrangements or stop loss reinsurance  agreements or arrangements that attach at
an attachment point less than the expected loss ratio;

         (q)  make  any  material  change  in   its  reinsurance  agreements  or
arrangements;

         (r) enter into any  agreement or  arrangement  that limits or otherwise
restricts  LaSalle Holdings or any of its Subsidiaries or any successor  thereto
or that could,  after the Effective Time, limit or restrict New Holdings and its
Subsidiaries or any successor thereto, from engaging or competing in any line of
business or in any geographic area; or

         (s)  enter  into  any  new  transaction,   agreement,   arrangement  or
understanding  with any other  Persons that would be required to be disclosed in
the LaSalle SEC Reports  (excluding  the amendment to the CatEPut) in accordance
with Item 404 of Schedule S-K under the Securities Act.

         Nothing in this Section 5.2 shall preclude  LaSalle Holdings or LaSalle
Re from  implementing a new pension plan or amending  existing pension plans, to
comply with Bermuda law.

                                       53
<PAGE>


         Section 5.3.      No Solicitation.

         (a)      No Solicitation by Trenwick.

                  (i)  Trenwick  shall  not,  nor  shall  it  permit  any of its
                  Subsidiaries  to, nor shall it  authorize or permit any of its
                  directors,  officers or  employees or any  investment  banker,
                  financial    advisor,    attorney,    accountant    or   other
                  representative  retained by it or any of its  Subsidiaries to,
                  and it shall use  commercially  reasonable  efforts  to ensure
                  that such Persons do not directly or indirectly,  (x) solicit,
                  initiate  or  encourage   (including   by  way  of  furnishing
                  information), or take any other action designed to facilitate,
                  any inquiries or the making of any proposal which  constitutes
                  any  Trenwick  Takeover  Proposal  (as  defined  below) or (y)
                  participate in any discussions or  negotiations  regarding any
                  Trenwick Takeover Proposal; provided, however, that if, at any
                  time the Board of  Directors  of Trenwick  determines  in good
                  faith,  after  consultation  with outside counsel,  that it is
                  necessary  to do so in order  to  comply  with  its  fiduciary
                  duties to the  stockholders of Trenwick under  applicable law,
                  Trenwick may, in response to a Trenwick  Superior Proposal (as
                  defined in Section  5.3(a)(ii))  which was not solicited by it
                  or  which  did not  otherwise  result  from a  breach  of this
                  Section  5.3(a)(i),  and subject to  providing  prior  written
                  notice of its decision to take such action to LaSalle Holdings
                  and   compliance   with  Section   5.3(a)(iii),   (x)  furnish
                  information  with respect to Trenwick and its  Subsidiaries to
                  any Person making a Trenwick  Superior  Proposal pursuant to a
                  customary confidentiality agreement (as determined by Trenwick
                  after   consultation   with  its  outside   counsel)  and  (y)
                  participate  in  discussions  or  negotiations  regarding such
                  Trenwick  Superior  Proposal.  For purposes of this Agreement,
                  "Trenwick  Takeover  Proposal" means any inquiry,  proposal or
                  offer  from any  Person  relating  to any  direct or  indirect
                  acquisition or purchase of a business that  constitutes 15% or
                  more of the net revenues, net income or assets of Trenwick and
                  its  Subsidiaries,  taken  as a  whole,  or 15% or more of any
                  class  of  equity   securities  of  Trenwick  or  any  of  its
                  Subsidiaries,  any  tender  offer or  exchange  offer  that if
                  consummated would result in any Person beneficially owning
                  15% or more of any class of equity  securities  of Trenwick or
                  any  of  its  Subsidiaries,   or  any  merger,  consolidation,
                  amalgamation,    business    combination,    recapitalization,
                  liquidation,  dissolution  or  similar  transaction  involving
                  Trenwick   or  any  of  its   Subsidiaries,   other  than  the
                  transactions  contemplated  by  this  Agreement  or the  Stock
                  Option Agreements.

                  (ii) Except as expressly  permitted  by this  Section  5.3(a),
                  neither the Board of Directors  of Trenwick nor any  committee
                  thereof shall (x) withdraw or modify,  or propose  publicly to
                  withdraw or modify,  in a manner adverse to LaSalle  Holdings,
                  the approval or  recommendation  by such Board of Directors or
                  such  committee  of  this   Agreement  and  the   transactions
                  contemplated  hereby,  (y)  approve or  recommend,  or propose
                  publicly  to  approve  or  recommend,  any  Trenwick  Takeover


                                       54

<PAGE>


                  Proposal,  or (z) cause  Trenwick  to enter into any letter of
                  intent, agreement in principle, acquisition agreement or other
                  similar  agreement (each a "Trenwick  Acquisition  Agreement")
                  related to any Trenwick Takeover Proposal. Notwithstanding the
                  foregoing, the Board of Directors of Trenwick (x) may withdraw
                  or modify its approval and  recommendation  of this  Agreement
                  and the  transactions  contemplated  hereby  if the  Board  of
                  Directors of Trenwick determines in good faith that it has the
                  fiduciary  duty  to do so  under  applicable  law  and (y) may
                  terminate this Agreement and  concurrently  with or after such
                  termination,  if it so chooses,  cause  Trenwick to enter into
                  any  Trenwick  Acquisition   Agreement  with  respect  to  any
                  Trenwick Superior  Proposal,  but only at a time that is after
                  the fifth business day following  LaSalle Holdings' receipt of
                  written  notice  advising  LaSalle  Holdings that the Board of
                  Directors  of  Trenwick  is  prepared  to  accept  a  Trenwick
                  Superior   Proposal,   specifying   the  material   terms  and
                  conditions of such Trenwick  Superior Proposal and identifying
                  the  person  making  such  Trenwick  Superior  Proposal.   For
                  purposes of this  Agreement,  a "Trenwick  Superior  Proposal"
                  means any proposal made by a third party to acquire,  directly
                  or indirectly,  including pursuant to a tender offer, exchange
                  offer,   merger,    consolidation,    business    combination,
                  recapitalization,    liquidation,   dissolution   or   similar
                  transaction,  for  consideration  consisting  of  cash  and/or
                  securities,  more than 50% of the combined voting power of the
                  Trenwick Shares then outstanding or all or  substantially  all
                  the assets of Trenwick and  otherwise on terms which the Board
                  of Directors of Trenwick determines in its good faith judgment
                  (after  receiving  the  advice  of  a  financial   advisor  of
                  nationally  recognized  reputation)  to be more  favorable  to
                  Trenwick's   stockholders   than   this   Agreement   and  the
                  transactions  contemplated hereby and for which financing,  to
                  the extent  required,  is then committed or which, in the good
                  faith  judgment  of the Board of  Directors  of  Trenwick,  is
                  reasonably capable of being obtained by such third party.

                  (iii) In addition to the  obligations of Trenwick set forth in
                  subparagraphs  (a)  (i) and (a)  (ii)  of  this  Section  5.3,
                  Trenwick shall immediately  advise LaSalle Holdings orally and
                  in writing of any request for  information  or of any Trenwick
                  Takeover  Proposal,  the material terms and conditions of such
                  reques  or  Trenwick  Takeover  Trenwick  Takeover   Proposal.
                  Trenwick  will  keep  LaSalle  Holdings   reasonably  informed
                  of  the status and details (including  amendments or  proposed
                  amendments) of any such request or Trenwick Takeover Proposal.

                  (iv) Nothing  contained in this Section  5.3(a) shall prohibit
                  Trenwick  from taking and  disclosing  to its  stockholders  a
                  position  contemplated by Rule 14e-2(a)  promulgated under the
                  Exchange  Act or from  making  any  disclosure  to  Trenwick's
                  stockholders  if, in the good faith  judgment  of the Board of
                  Directors  of  Trenwick,   after   consultation  with  outside
                  counsel, failure so to disclose would be inconsistent with its
                  obligations under applicable law.

                                       55
<PAGE>


         (b)      No Solicitation by LaSalle Holdings.

                  (i) LaSalle Holdings shall not, nor shall it permit any of its
                  Subsidiaries  to, nor shall it  authorize or permit any of its
                  directors,  officers or  employees or any  investment  banker,
                  financial    advisor,    attorney,    accountant    or   other
                  representative  retained by it or any of its  Subsidiaries to,
                  and it shall use  commercially  reasonable  efforts  to ensure
                  that such Persons do not directly or indirectly,  (x) solicit,
                  initiate  or  encourage   (including   by  way  of  furnishing
                  information), or take any other action designed to facilitate,
                  any inquiries or the making of any proposal which  constitutes
                  any LaSalle Holdings  Takeover  Proposal (as defined below) or
                  (y) participate in any  discussions or negotiations  regarding
                  any LaSalle Holdings  Takeover  Proposal;  provided,  however,
                  that if,  at any  time  the  Board  of  Directors  of  LaSalle
                  Holdings  determines in good faith,  after  consultation  with
                  outside  counsel,  that it is  necessary  to do so in order to
                  comply with its fiduciary  duties to  shareholders  of LaSalle
                  Holdings  under  applicable  law,  LaSalle  Holdings  may,  in
                  response to a LaSalle Holdings  Superior  Proposal (as defined
                  in Section  5.3(b)(ii)) which was not solicited by it or which
                  did  not  otherwise  result  from a  breach  of  this  Section
                  5.3(b)(i),  and subject to providing  prior written  notice of
                  its  decision to take such action to Trenwick  and  compliance
                  with Section 5.3(b)(iii), (x) furnish information with respect
                  to LaSalle  Holdings and its Subsidiaries to any Person making
                  a LaSalle Holdings  Superior  Proposal pursuant to a customary
                  confidentiality  agreement (as determined by LaSalle  Holdings
                  after   consultation   with  its  outside   counsel)  and  (y)
                  participate  in  discussions  or  negotiations  regarding such
                  LaSalle  Holdings  Superior  Proposal.  For  purposes  of this
                  Agreement,  "LaSalle  Holdings  Takeover  Proposal"  means any
                  inquiry,  proposal  or offer from any Person  relating  to any
                  direct or indirect  acquisition or purchase of a business that
                  constitutes  15% or more of the net  revenues,  net  income or
                  assets of LaSalle  Holdings and its  Subsidiaries,  taken as a
                  whole,  or 15% or more of any  class of equity  securities  of
                  LaSalle Holdings or any of its Subsidiaries,  any tender offer
                  or  exchange  offer that if  consummated  would  result in any
                  person  beneficially owning 15% or more of any class of equity
                  securities of LaSalle Holdings or any of its Subsidiaries,  or
                  any merger, consolidation, amalgamation, business combination,
                  recapitalization,   liquidation,   dissolution   or    similar
                  transaction   involving   LaSalle   Holdings  or  any  of  its
                  Subsidiaries,  other  than  the transactions  contemplated  by
                  this  Agreement  or the Stock Option Agreements.

                  (ii) Except as expressly  permitted  by this  Section  5.3(b),
                  neither the Board of  Directors  of LaSalle  Holdings  nor any
                  committee  thereof  shall (x)  withdraw or modify,  or propose
                  publicly  to  withdraw  or  modify,  in a  manner  adverse  to
                  Trenwick,  the  approval  or  recommendation  by such Board of
                  Directors  or  such   committee  of  this  Agreement  and  the
                  transactions contemplated hereby, (y) approve or recommend, or
                  propose publicly to approve or recommend, any LaSalle Holdings
                  Takeover Proposal, or (z) cause LaSalle Holdings to enter into
                  any  letter of intent,  agreement  in  principle,  acquisition
                  agreement or other similar agreement (each a "LaSalle Holdings


                                       56
<PAGE>


                  Acquisition   Agreement")  related  to  any  LaSalle  Holdings
                  Takeover Proposal. Notwithstanding the foregoing, the Board of
                  Directors  of LaSalle  Holdings (x) may withdraw or modify its
                  approval  and   recommendation   of  this  Agreement  and  the
                  transactions  contemplated hereby if the Board of Directors of
                  LaSalle  Holdings  determines  in good  faith  that it has the
                  fiduciary  duty  to do so  under  applicable  law  and (y) may
                  terminate this Agreement and  concurrently  with or after such
                  termination, if it so chooses, cause LaSalle Holdings to enter
                  into any LaSalle Holdings  Acquisition  Agreement with respect
                  to any LaSalle Holdings Superior Proposal,  but only at a time
                  that is after  the fifth  business  day  following  Trenwick's
                  receipt of written notice advising  Trenwick that the Board of
                  Directors of LaSalle  Holdings is prepared to accept a LaSalle
                  Holdings Superior Proposal,  specifying the material terms and
                  conditions  of such  LaSalle  Holdings  Superior  Proposal and
                  identifying the person making such LaSalle  Holdings  Superior
                  Proposal.  For purposes of this Agreement, a "LaSalle Holdings
                  Superior Proposal" means any proposal made by a third party to
                  acquire,  directly  or  indirectly,  including  pursuant  to a
                  tender   offer,   exchange   offer,   merger,   consolidation,
                  amalgamation,    business    combination,    recapitalization,
                  liquidation,   dissolution   or   similar   transaction,   for
                  consideration consisting of cash and/or securities,  more than
                  50% of the combined  voting power of LaSalle  Holdings  Shares
                  then  outstanding  or all or  substantially  all the assets of
                  LaSalle  Holdings  and  otherwise  on terms which the Board of
                  Directors  of LaSalle  Holdings  determines  in its good faith
                  judgment (after receiving the advice of a financial advisor of
                  nationally  recognized  reputation)  to be more  favorable  to
                  LaSalle  Holdings'  stockholders  than this  Agreement and the
                  transactions  contemplated hereby and for which financing,  to
                  the extent  required,  is then committed or which, in the good
                  faith judgment of the Board of Directors of LaSalle  Holdings,
                  is reasonably capable of being obtained by such third party.

                  (iii) In addition to the  obligations of LaSalle  Holdings set
                  forth in subparagraphs (b)(i) and (b)(ii) of this Section 5.3,
                  LaSalle Holdings shall immediately  advise Trenwick orally and
                  in writing of any  request for  information  or of any LaSalle
                  Holdings Takeover Proposal,  the material terms and conditions
                  of such request or  LaSalle  Holdings  Takeover  Proposal  and
                  the identity of the person  making  such  request  or  LaSalle
                  Holdings  Takeover  Proposal.  LaSalle   Holdings  will   keep
                  Trenwick   reasonably  informed  of  the   status and  details
                  (including  amendments  or  proposed  amendments) of  any such
                  request or LaSalle  Holdings Takeover Proposal.

                  (iv) Nothing  contained in this Section  5.3(b) shall prohibit
                  LaSalle   Holdings   from   taking  and   disclosing   to  its
                  stockholders   a  position   contemplated   by  Rule  14e-2(a)
                  promulgated   under  the  Exchange  Act  or  from  making  any
                  disclosure to LaSalle  Holdings'  shareholders if, in the good
                  faith judgment of the Board of Directors of LaSalle  Holdings,
                  after  consultation  with  outside  counsel,   failure  so  to
                  disclose  would be  inconsistent  with its  obligations  under
                  applicable law.


                                       57

<PAGE>

         Section 5.4.      Access to Information;  Confidentiality.  Between the
date of the Original  Agreement and the Effective Time, each of LaSalle Holdings
and Trenwick  shall,  and shall cause each of its  respective  Subsidiaries  to,
afford the other party and its officer, employees and authorized representatives
(including,  without  limitation,  attorneys,  auditors,  financial advisors and
actuaries) of the other  reasonable  access during normal  business hours during
the period prior to the Effective Time to all its  personnel,  offices and other
facilities  and to its books and  records  and will  permit  such  party and its
authorized  representatives  to  make  such  inspections  of its  financial  and
operating data and other information with respect to its business and properties
as  such  party  and  its  authorized  representatives  may  from  time  to time
reasonably  request.  No information or knowledge  obtained in any investigation
pursuant  to  this  Section  5.4  shall  affect  or  be  deemed  to  modify  any
representation  or warranty  contained in the Agreement or the conditions to the
obligations of the parties to consummate the Plans. The  confidentiality  of all
such documents and  information  furnished in connection  with the  transactions
contemplated   by  this  Agreement  shall  be  governed  by  the  terms  of  the
Confidentiality Letter.

         Section 5.5.    Form S-4; Regulatory  Matters. As soon as is reasonably
practicable  following the date of the Original Agreement,  LaSalle Holdings and
Trenwick  shall prepare and file with the SEC,  pursuant to Rule 14a-6(a)  under
the Exchange Act, the Joint Proxy Statement and a registration  statement of New
Holdings  on Form S-4 with  respect  to the  transactions  contemplated  by this
Agreement.  LaSalle  Holdings and Trenwick  shall cause New Holdings to file the
Form S-4 promptly  after the  conclusion  of the SEC's review of the Joint Proxy
Statement.  Each of LaSalle  Holdings  and  Trenwick  shall  provide  reasonable
opportunity  for the other to review and comment  upon the contents of the Joint
Proxy Statement and the Form S-4 and shall not include therein or omit therefrom
any  information  or supplement  to which counsel to the other shall  reasonably
object  or  specifically  request  (as the case may be).  After  the date of the
mailing of the Joint Proxy  Statement,  each of LaSalle  Holdings  and  Trenwick
agrees  promptly  to  notify  the  other of and to  correct  or  supplement  any
information which either of them shall have furnished for inclusion in the Joint
Proxy  Statement  that shall have become  false or  misleading  in any  material
respect.  Trenwick and LaSalle  Holdings shall use all  commercially  reasonable
efforts to have the Joint Proxy Statement  cleared by the SEC under the Exchange
Act and the Form S-4 declared  effective under the Securities Act as promptly as
practicable  after such filing.  New Holdings  shall also take any action (other
than  qualifying  to do business in any  jurisdiction  in which it is not now so
qualified  or to file a general  consent to service of  process)  required to be
taken under any  applicable  state  securities and "Blue Sky" laws in connection
with the issue of New Holdings  Shares in accordance with the Plans and upon the
exercise  of New  Holdings  Options  (as  defined  herein)  and each of  LaSalle
Holdings and Trenwick shall furnish all  information  concerning  itself and its
shareholders as may reasonably be requested in connection with any such action.

         Section 5.6. Public Announcements.  LaSalle Holdings and Trenwick shall
not issue any press release or otherwise make any public statements with respect
to the Plans,  this Agreement or the  transactions  contemplated  hereby without
first  consulting  with each other,  and providing each other the opportunity to
review,  comment  upon and concur as to the  wording,  timing and media for such
press release or statement,  except for any press release or statement as may be
required by  applicable  law,  court process or the  obligation  pursuant to any
listing statement with any national  securities  exchange,  in which case notice
shall be given to the other party prior to the issuance of such press release or
the dissemination of such written  material.  The parties agree that the initial
press  release,  if any,  to be issued  with  respect to the  execution  of this
Agreement and the transactions  contemplated hereby shall be in a form agreed to
by the parties.



                                       58

<PAGE>

         Section 5.7.  Supplemental  Information.  Prior to the Effective  Time,
each party will  promptly  disclose  in writing to the other  parties any matter
hereafter  arising  which,  if  existing,  occurring or known at the date of the
Original  Agreement  would  have been  required  to be  disclosed  to such other
parties.  Each party shall  promptly  advise the other  parties of such  party's
knowledge of any Material Adverse Effect.  Except where prohibited by applicable
statutes and  regulations,  each party shall promptly  provide the other (or its
counsel) with copies of all filings, material notices or material communications
made by such party with any Governmental  Authority  (including the SEC or NYSE)
in  connection  with this  Agreement  or the  Stock  Option  Agreements,  or the
transactions  contemplated hereby or thereby. No information provided to a party
pursuant  to this  Section  5.7  shall  be  deemed  to cure  any  breach  of any
representation  of or warranty made in this Agreement unless the party receiving
such information specifically agrees thereto in writing.

         Section 5.8.      Shareholders'  Meetings. LaSalle Holdings and LaSalle
Re shall each request the Court to convene a special  meeting of its  respective
shareholders (and, if necessary,  classes of shareholders),  with the meeting of
LaSalle  Holdings to occur  first,  and  Trenwick,  acting  through its Board of
Directors,  shall  in  accordance  with the GCL call a  special  meeting  of its
stockholders (and, if necessary, classes of stockholders), and shall give notice
of,  convene and hold such special  meetings as soon as  practicable,  but in no
event more than 45 days, after the Form S-4 is declared effective by the SEC for
the purpose of approving this Agreement and all actions  contemplated hereby. In
connection with such meetings, each of LaSalle Holdings, LaSalle Re and Trenwick
shall mail the Joint Proxy Statement to its respective  shareholders as promptly
as practicable.  The respective Boards of Directors of each of LaSalle Holdings,
LaSalle Re and Trenwick shall submit for approval and adoption by its respective
shareholders the matters to be voted upon at such meetings and shall, subject to
their fiduciary  duties after having consulted with and considered the advice of
outside counsel,  include in the Joint Proxy Statement the recommendation of its
respective  Board  of  Directors  that  the  shareholders  vote in  favor of the
approval and adoption of this  Agreement and the Plans and each such party shall
(subject to the fiduciary duties of its Board of Directors) use all commercially
reasonable  efforts to secure such  approval  and  adoption.  LaSalle  Holdings,
LaSalle Re and  Trenwick  shall  coordinate  and  cooperate  with respect to the
timing of such  meetings  and shall  endeavor to hold such  meetings on the same
day.

                                       59

<PAGE>


         Section 5.9.      Trenwick Options, LaSalle Holdings Options, LaSalle
Re Options and Trenwick Warrants.

         (a)      Trenwick Options.

                  (i) At the Effective  Time, each  outstanding  Trenwick Option
                  shall be  replaced by an option (a "New  Holdings  Option") to
                  acquire New  Holdings  Shares,  the terms of which shall be no
                  less  favorable  than the terms  currently  applicable to such
                  Trenwick  Option,   under  a  new  stock  option  plan  to  be
                  established  by New  Holdings  for such  purposes  before  the
                  Closing Date (the "New Holdings Option Plan"), all as provided
                  in Section 5.9(a)(ii).

                  (ii) The cancellation of Trenwick Options and replacement with
                  New Holdings  Options shall comply in all respects  with,  and
                  shall  be  performed  in  accordance   with,  the  methodology
                  prescribed by the provisions of Section 424(a) of the Code and
                  the regulations  thereunder and each New Holdings Option shall
                  provide the option holder with termination  rights that are no
                  less  favorable  to such holder than were  provided  under the
                  Trenwick  Option for which it was replaced as of the Effective
                  Time.  The  parties  contemplate  that,  consistent  with  the
                  methodology  prescribed by Section  424(a) of the Code and the
                  applicable  regulations  thereunder  (A)  the  number  of  New
                  Holdings  Shares  subject to such New Holdings  Option will be
                  determined  by  multiplying  the  number  of  Trenwick  Shares
                  subject to Trenwick  Options by the  Trenwick  Exchange  Ratio
                  (rounded to the next higher  whole number with respect to each
                  holder  thereof)  and (B) the  exercise  price  under such New
                  Holdings  Option will be  determined  by dividing the exercise
                  price  per  share   under  the   Trenwick   Option  in  effect
                  immediately  prior  to the  Effective  Time  by  the  Trenwick
                  Exchange Ratio and rounding the exercise price thus determined
                  to the nearest whole cent (a half-cent shall be rounded to the
                  next higher whole cent).

                  (iii) As promptly as practicable after the Effective Time, New
                  Holdings shall issue to each holder of an outstanding Trenwick
                  Option a document  evidencing  the New Holdings  Option having
                  the terms  provided  for in  Sections  5.9(a)(i)  and (ii) and
                  effective as of the Effective Time.

         (b)      LaSalle Holdings Options.

                  (i) At the Effective Time, each  outstanding  LaSalle Holdings
                  Option shall be replaced by a New Holdings  Option,  the terms
                  of which shall be no less favorable  than the terms  currently
                  applicable  to such  LaSalle  Holdings  Option,  under the New
                  Holdings Option Plan, all as provided in Section 5.9(b)(ii).

                  (ii)  The   cancellation  of  LaSalle   Holdings  Options  and
                  replacement  with New  Holdings  Options  shall  comply in all
                  respects with, and shall be performed in accordance  with, the

                                       60

<PAGE>

                  methodology  prescribed by the provisions of Section 424(a) of
                  the Code and the regulations  thereunder and each New Holdings
                  Option shall provide the option holder with termination rights
                  that are no less  favorable to such holder than were  provided
                  under the LaSalle Holdings Option for which it was replaced as
                  of  the  Effective   Time.  The  parties   contemplate   that,
                  consistent with the  methodology  prescribed by Section 424(a)
                  of the Code and the applicable  regulations thereunder (A) the
                  number of New  Holdings  Shares  subject to such New  Holdings
                  Option will be determined by multiplying the number of LaSalle
                  Holdings  Shares  subject to LaSalle  Holdings  Options by the
                  LaSalle  Exchange  Ratio  (rounded  to the next  higher  whole
                  number  with  respect  to  each  holder  thereof)  and (B) the
                  exercise  price  under  such  New  Holdings   Option  will  be
                  determined by dividing the exercise  price per share under the
                  LaSalle  Holdings  Option in effect  immediately  prior to the
                  Effective Time by the LaSalle  Exchange Ratio and rounding the
                  exercise  price thus  determined  to the nearest whole cent (a
                  half-cent shall be rounded to the next higher whole cent).

                  (iii) As promptly as practicable after the Effective Time, New
                  Holdings shall issue to each holder of an outstanding  LaSalle
                  Holdings Option a document  evidencing the New Holdings Option
                  having the terms  provided for in Sections  5.9(b)(i) and (ii)
                  and effective as of the Effective Time.

         (c)      LaSalle Re Options. Subject to Section 2.6(e):

                  (i)  Pursuant  to Section  2(H) of that  certain  Amended  and
                  Restated  Option  Agreement  dated  November  27,  1995  among
                  LaSalle  Holdings,  LaSalle  Re and each of the  optionholders
                  listed on  Schedule  I thereto,  from and after the  Effective
                  Time,  each  holder  of  an  outstanding   option  to  acquire
                  Non-Voting  Shares  shall be  entitled,  upon  payment  of the
                  exercise price thereof, to receive, at such holder's election,
                  either (i) the  number of  Non-Voting  Shares  covered by such
                  option or (ii) the  number of New  Holdings  Shares  that such
                  holder would have received  pursuant to Section  2.6(a) (plus,
                  if  applicable,  the  amount  of  cash  payable  in  lieu of a
                  fractional share that such holder would have received pursuant
                  to Section  2.12) if such  holder had  exercised  such  option
                  immediately prior to the Effective Time. LaSalle Re undertakes
                  to use commercially  reasonable  efforts to obtain the consent
                  of each of the holders of such options to the  cancellation of
                  such  options  and   replacement  thereof  with  New  Holdings
                  Options, the terms of which shall be no  less  favorable  than
                  the terms currently  applicable to such options.

                  (ii)   Pursuant  to  Section  2(F)  of  that   certain   Stock
                  Appreciation  Rights  Agreement  dated  as of  April  1,  1994
                  between  Victor H.  Blake and  LaSalle  Re, if Victor H. Blake
                  exercises  any of his stock  appreciation  rights  during  the
                  period  beginning at the Effective Time and ending on November
                  22,  2003,  he shall be  entitled to receive the number of New
                  Holdings  Shares  that he  would  have  received  pursuant  to
                  Section  2.6(a)  (plus,  if  applicable,  the  amount  of cash
                  payable  in lieu of a  fractional  share  that he  would  have
                  received  pursuant to Section 2.12) if he had  exercised  such
                  stock  appreciation  rights immediately prior to the Effective
                  Time.


                                       61

<PAGE>

         (d)  Registration  of  Options.  If the  New  Holdings  Options  issued
pursuant to Sections 5.9(a), (b) and (c) are not already covered by an effective
registration  statement,  New  Holdings  will file a  registration  statement as
promptly as practicable after the Effective Time, which  registration  statement
will cover the New Holdings  Shares  issuable  upon exercise of the New Holdings
Options granted in substitution of Trenwick  Options,  LaSalle  Holdings Options
and LaSalle Re Options,  and New Holdings will use all  commercially  reasonable
efforts to cause  such  registration  statement  to become  effective  under the
Securities Act and to maintain such  registration  statement in effect until the
exercise or termination of all such New Holdings Options.

         (e) Trenwick  Warrants.  At the Effective Time,  each then  outstanding
warrant of  Trenwick  shall be assumed by New  Holdings in  accordance  with its
terms.

         Section 5.10.     Takeover Laws. The parties shall use all commercially
reasonable  efforts to exempt the  transactions  contemplated  by this Agreement
from,  and otherwise act to eliminate or minimize the effects of any  applicable
takeover or change of control law.

         Section 5.11.     Affiliates.

         (a) At least  five  days  prior to the  Closing  Date,  Trenwick  shall
deliver to LaSalle Holdings a letter identifying all persons who are anticipated
to be,  at the  time  of the  Trenwick  stockholders  meeting,  "affiliates"  of
Trenwick  for  purposes  of Rule 145  under the  Securities  Act  ("Rule  145").
Trenwick shall furnish such  information  and documents as LaSalle  Holdings may
reasonably request for the purpose of reviewing such letter.  Trenwick shall use
all commercially reasonable efforts to cause each Person who is identified as an
"affiliate" in such letter to deliver to LaSalle Holdings,  prior to the Closing
Date, a written  agreement in connection with  restrictions on affiliates  under
Rule 145, in a form mutually agreeable to Trenwick and LaSalle Holdings.

         (b) At least  five days prior to the  Closing  Date,  LaSalle  Holdings
shall deliver to Trenwick a letter  identifying  all Persons who are anticipated
to be, at the time of the LaSalle Holdings shareholders meeting, "affiliates" of
LaSalle  Holdings for purposes of Rule 145.  LaSalle Holdings shall furnish such
information and documents as Trenwick may reasonably  request for the purpose of
reviewing such letter.  LaSalle Holdings shall use all  commercially  reasonable
efforts to cause each Person who is identified as an  "affiliate" in such letter
to deliver to  Trenwick,  prior to the  Closing  Date,  a written  agreement  in
connection with  restrictions  on affiliates  under Rule 145, in a form mutually
agreeable to Trenwick and LaSalle Holdings.

         Section 5.12. Stock Exchange  Listing.  Trenwick,  LaSalle Holdings and
New  Holdings  shall use all  commercially  reasonable  efforts to cause the New
Holdings  Shares to be issued in accordance  with the Plans and the New Holdings
Shares to be  reserved  for issue upon  exercise of New  Holdings  Options to be
approved for listing on the NYSE, subject to official notice of issuance,  prior
to the Closing Date.

                                       62
<PAGE>


         Section 5.13.     Indemnification and Insurance.

         (a) From and after the Effective  Time, New Holdings  shall  indemnify,
defend and hold  harmless  each  Person who is, or has been at any time prior to
the date  hereof or who  becomes  prior to the  Effective  Time,  an  officer or
director of Trenwick and LaSalle Holdings (the  "Indemnified  Parties")  against
all  losses,  expenses,  claims,  damages  and  liabilities  arising  out of the
transactions  contemplated by this Agreement to the fullest extent  permitted or
required  under  applicable  law  (including,  without  limitation,   reasonable
attorneys' fees).  Subject to any limitations  imposed by Bermuda law and public
policy,  to the  extent  applicable,  New  Holdings  agrees  that all  rights to
indemnification  existing in favor of current and former  directors and officers
of  Trenwick,  LaSalle  Holdings  or any of  their  respective  Subsidiaries  as
provided  in such  corporation's  certificate  of  incorporation  or by-laws (or
analogous documents) or existing indemnification  agreements, as in effect as of
the date of the Original  Agreement,  with respect to matters  occurring through
the Effective Time, shall survive the Plans and shall continue in full force and
effect, and New Holdings shall guarantee the obligations of Trenwick and LaSalle
Holdings in respect thereof;  provided,  however,  that this shall not limit the
ability  of  New  Holdings  to  effect  any  corporate   restructuring   of  its
Subsidiaries.

         (b) New Holdings  shall cause to be maintained for a period of not less
than six years from the Effective Time the  directors'  and officers'  insurance
and, fiduciary liability insurance indemnification policies currently maintained
by Trenwick  and  LaSalle  Holdings  to the extent  that such  policies  provide
coverage for events  occurring prior to the Effective Time (the "D&O Insurance")
for any of the Indemnified  Parties so long as the annual premium therefor would
not be in excess of two hundred  percent  (200%) of the last annual premium paid
prior to the date of the Original  Agreement (two hundred percent (200%) of such
premium, the "Maximum Premium");  provided,  however,  that New Holdings may, in
lieu of maintaining such existing D&O Insurance as provided above, cause no less
favorable coverage to be provided under any policy maintained for the benefit of
the  directors  and  officers  of  Trenwick,  LaSalle  Holdings  or any of their
respective  Subsidiaries,  so long as (i) the insurance  company  providing such
coverage  thereof has an A.M.  Best  Company  rating of A or better and (ii) the
material terms thereof are no less advantageous to the Indemnified  Parties than
the existing D&O Insurance. If the existing D&O Insurance expires, is terminated
or  cancelled  or if the  premium  for such D&O  Insurance  exceeds  the Maximum
Premium during such six-year period, New Holdings will cause to be obtained,  to
the extent commercially available,  replacement D&O Insurance as can be obtained
for the  remainder  of such  six-year  period for a premium not in excess of the
Maximum Premium on terms and conditions no less  advantageous to the Indemnified
Parties than the existing D&O Insurance.

         (c) The  provisions  of  Section  5.13 are in  addition  to, and not in
substitution  for any  rights  that an  Indemnified  Party  may have  under  the
applicable certificate of incorporation,  memorandum of association, or by-laws,
bye-laws  or  agreements  with  Trenwick  and  LaSalle  Holdings or any of their
respective  Subsidiaries or under applicable law. New Holdings agrees to pay all
costs and expenses (including fees and expenses of counsel) that may be incurred
by an  Indemnified  Party  in  successfully  enforcing  the  indemnity  or other
obligations  under this Section 5.13.  The provisions of this Section 5.13 shall
survive  the  Closing  and are  intended  for  the  benefit  of,  and  shall  be
enforceable  by,  each  of  the  Indemnified  Parties,  their  heirs  and  their
representatives.

                                       63
<PAGE>


         Section  5.14.  Commercially  Reasonable  Efforts.  Upon the  terms and
subject to the conditions and other agreements set forth in this Agreement, each
of the parties hereto will use commercially reasonable efforts to take, or cause
to be  taken,  all  actions  and to do, or cause to be done,  and to assist  and
cooperate  with the other  parties  in doing,  all things  necessary,  proper or
advisable to  consummate  and make  effective,  in the most  expeditious  manner
possible,  the  transactions  contemplated  by this  Agreement  (including  with
respect to Trenwick,  the reduction of any taxation of Trenwick arising from the
Plan of  Reorganization)  and shall use all commercially  reasonable  efforts to
obtain  all  waivers,   permits,  consents  and  approvals  and  to  effect  all
registrations,  filings and  notices  with or to third  parties or  Governmental
Authorities which are necessary or desirable in connection with the transactions
contemplated  by this  Agreement.  If, at any time after the Effective  Time any
further  action is  necessary  or  desirable  to carry out the  purposes of this
Agreement,  the proper officers or directors of each of the parties hereto shall
take such action.

         Section 5.15.     Post-Closing Matters.

         (a) LaSalle  Holdings,  Trenwick and their respective  Affiliates shall
(and,  following the  Effective  Time,  New Holdings  shall) take no action with
respect to the stock,  assets or  liabilities  of LaSalle  Holdings or Trenwick,
including,  without limitation, the filing of Tax returns or reports, that would
be inconsistent  with the  qualification  of the Plans as tax-free under Section
351 of the Code; provided,  however,  that Trenwick,  LaSalle Holdings and their
respective Affiliates may file with the appropriate Governmental Authorities and
execute all documents  necessary to consummate the Plans and other  transactions
contemplated by this Agreement.

         (b) Upon  request,  New  Holdings  shall  use  commercially  reasonable
efforts to  cooperate  with any LaSalle  Holdings  shareholder  or any  Trenwick
stockholder in the completion and administration of a gain recognition agreement
under Section 367 of the Code.

         Section 5.16.     Employee Benefit Plans; Existing Agreements.
         (a) For a period of at least one year  after the  Effective  Time,  New
Holdings will cause (i) the employees of Trenwick and its  Subsidiaries  who are
employed  immediately  after the Effective  Time  ("Trenwick  Employees")  to be
provided with employee  benefits under Employee  Benefit Plans maintained by New
Holdings  ("New  Holdings  Plans") which are no less  favorable in the aggregate
than benefits provided to Trenwick Employees  immediately prior to the Effective
Time; and (ii) the employees of LaSalle  Holdings and its  Subsidiaries  who are
employed  immediately after the Effective Time ("LaSalle Holdings Employees") to
be provided with  employee  benefits  under the New Holdings  Plans which are no
less  favorable in the  aggregate  than  benefits  provided to LaSalle  Holdings
Employees immediately prior to the Effective Time, except for the termination of
the LaSalle Re Holdings Limited Employee Stock Purchase Plan.


                                       64

<PAGE>

         (b) With respect to each New Holdings Plan, for purposes of determining
eligibility to participate,  vesting and entitlement to benefits,  including for
severance  benefits  and  vacation  entitlement  (but not for accrual of pension
benefits  except to the extent that past service credit is provided in a similar
manner to both Trenwick Employees and LaSalle Holdings Employees),  service with
Trenwick and its Subsidiaries by Trenwick Employees  employed  immediately after
the  Effective  Time shall be treated as service  with New  Holdings and service
with  LaSalle  Holdings  and its  Subsidiaries  by  LaSalle  Holdings  Employees
employed  immediately  after the Effective Time shall be treated as service with
New Holdings;  provided,  however,  that such service shall not be recognized to
the extent that such recognition would result in a duplication of benefits. Such
service  also shall  apply for  purposes  of  satisfying  any  waiting  periods,
evidence of  insurability  requirements  or the  application of any  preexisting
condition  limitations.  Trenwick Employees and LaSalle Holdings Employees shall
be given credit for amounts paid under a  corresponding  benefit plan during the
same period for purposes of applying  deductibles,  copayments and out-of-pocket
maximums as though such amounts had been paid in  accordance  with the terms and
conditions of the New Holdings Plan.

         (c) Except  with  respect  to those  plans and  arrangements  listed in
Section 5.16 of the Trenwick  Disclosure Letter or the LaSalle Disclosure Letter
(as  applicable),  following the  Effective  Time,  New Holdings  shall honor in
accordance with their terms (i) all employment, severance and other compensation
agreements  and  arrangements  existing  on or  prior to the  execution  of this
Agreement  which are  between  Trenwick  and any  director,  officer or employee
thereof and which have been disclosed in Section 3.16 of the Trenwick Disclosure
Letter and  previously  have been  delivered  to LaSalle  Holdings  and (ii) all
employment,   severance  and  other  compensation  agreements  and  arrangements
existing  on or prior to the  execution  of this  Agreement  which  are  between
LaSalle  Holdings and any director,  officer or employee  thereof and which have
been  disclosed  in  Section  4.16(a)  of  the  LaSalle  Disclosure  Letter  and
previously have been delivered to Trenwick.

         (d) It is understood and agreed between the parties that all provisions

contained in this Agreement  with respect to employee  benefit plans or employee
compensation are included for the sole benefit of the respective  parties hereto
and do not and shall not create any right in any other  person,  including,  but
not limited to, any LaSalle  Holdings  Employee or any  Trenwick  Employee,  any
participant in any benefit or compensation plan or any beneficiary thereof.

         Section 5.17.     Letters from Accountants.

         (a) LaSalle Holdings shall use all commercially  reasonable  efforts to
cause to be delivered  to Trenwick  two letters from  Deloitte & Touche LLP, its
independent public accountants, one dated a date within two business days before
the date on which  the Form S-4  shall  become  effective  and one  dated a date
within two business days before the Effective  Date, each addressed to Trenwick,
in form and  substance  reasonably  satisfactory  to Trenwick and  comparable in
scope and  substance to comfort  letters  customarily  delivered by  independent
public  accountants in connection with  registration  statements  similar to the
Form S-4 and transactions such as those contemplated by this Agreement.


                                       65

<PAGE>

         (b)  Trenwick  shall use its best  efforts to cause to be  delivered to
LaSalle  Holdings two letters of  PricewaterhouseCoopers  LLP,  its  independent
public accountants, one dated a date within two business days before the date on
which the Form S-4  shall  become  effective  and one  dated a date  within  two
business days before the Effective Date, each addressed to LaSalle Holdings,  in
form and substance reasonably satisfactory to LaSalle Holdings and comparable in
scope and  substance to comfort  letters  customarily  delivered by  independent
public  accountants in connection with  registration  statements  similar to the
Form S-4 and transactions such as those contemplated by this Agreement.

         Section 5.18.  Litigation.  Each of Trenwick and LaSalle Holdings shall
(to the extent their  interests do not diverge)  cooperate in the defense of any
litigation  against  Trenwick  or  LaSalle  Holdings,  as  applicable,  and  its
directors  and  officers  relating  to the  transactions  contemplated  by  this
Agreement, the Plans and the Stock Option Agreements.

         Section 5.19. Advice of Changes.  Each of Trenwick and LaSalle Holdings
agrees  that  it  shall  give  the  other  party   prompt   notice  of  (i)  any
representation  or  warranty  made by it  contained  in this  Agreement  that is
qualified as to materiality  becoming untrue or inaccurate in any respect or any
such  representation  or warranty  that is not so qualified  becoming  untrue or
inaccurate  in any material  respect or (ii) the failure by it to comply with or
satisfy in any  material  respect any  covenant,  condition  or  agreement to be
complied with or satisfied by it under this Agreement;  provided,  however, that
no such notification shall affect the representations,  warranties, covenants or
agreements of the parties or the  conditions to the  obligations  of the parties
under this Agreement.

         Section  5.20.  Trenwick  Rights  Agreement.  The Board of Directors of
Trenwick  shall take all  further  action (in  addition  to that  referred to in
Section 3.20)  reasonably  requested in writing by LaSalle  Holdings in order to
render the Trenwick Rights  inapplicable  to  transactions  contemplated by this
Agreement,  the Plans and the Stock  Option  Agreements  to the extent  provided
herein and in the Trenwick Rights Plan amendment.

         Section 5.21. New Holdings Rights Agreement.  The Board of Directors of
New Holdings shall take all action necessary to implement a shareholders  rights
plan  (the  "New  Holdings  Rights  Agreement"),  substantially  similar  to the
Trenwick Rights Agreement and Trenwick Rights, except as otherwise  contemplated
by Section 5.21 of the  Trenwick  Disclosure  Letter or as  otherwise  agreed by
Trenwick  and  LaSalle  Holdings,  with such  other  changes as are set forth on
Section 5.21 of the Trenwick  Disclosure  Letter and such changes therein as may
be agreed by Trenwick and LaSalle Holdings, effective as of the Effective Time.

         Section 5.22. Assumption of Non-Voting Share Conversion Obligation.  In
the event that this Agreement and the LaSalle Re Scheme of  Arrangement  are not
approved  by  the  vote  specified  in  Section  4.15(b),  then,  prior  to  the
consummation of the LaSalle  Holdings Scheme of Arrangement,  New Holdings shall
assume by written instrument the obligation to deliver one New Holdings Share in
exchange for each Non-Voting  Share  surrendered  for exchange  pursuant to that
certain  Conversion  Agreement  dated as of  November  27,  1995  among  LaSalle
Holdings, LaSalle Re and each of the Persons listed on Schedule I thereto.


                                       66

<PAGE>

         Section  5.23.  Assumption  of  Series  B  Preferred  Share  Conversion
Obligation.  Prior to the Effective  Time,  New Holdings shall assume by written
instrument  the  obligation  to deliver to the holders of any Series B Preferred
Shares,  par value  $1.00 per share,  of LaSalle  Holdings  ("Series B Preferred
Shares"),  upon the basis and upon the terms  and  conditions  specified  in the
Certificate  of  Designation,  Preferences  and Rights of the Series B Preferred
Shares with respect to the conversion of such Series B Preferred Shares,  and in
lieu of the LaSalle Holdings Shares immediately theretofore receivable upon such
conversion,  such  shares  of  stock,  securities  or assets as may be issued or
payable with respect to or in exchange for a number of LaSalle  Holdings  Shares
equal to the  number of  LaSalle  Holdings  Shares  immediately  theretofore  so
receivable had the Schemes of Arrangement not been consummated.

         Section  5.24.  Tax-Free  Reorganization.  Trenwick,  New  Holdings and
LaSalle Holdings shall each use its best efforts to cause the exchange described
in  Section  2.1(b) to be  treated as a  reorganization  within  the  meaning of
Section 368(a) of the Code and to cause the Schemes of Arrangement to be treated
as  tax-free  under  Section  351 of the Code and to cause the  delivery  of the
certificates  of  officers  and  opinions  upon  which the  opinions  of Baker &
McKenzie under Section  6.1(h),  Section 6.2(g) and Section 6.3(h) will rely and
upon which the opinion of Mayer, Brown & Platt under Section 6.1(g) will rely.


                                    ARTICLE 6

                             CONDITIONS TO THE PLANS

         Section 6.1. Conditions to Each Party's Obligation to Effect the Plans.
The  respective  obligations  of each party to this  Agreement to consummate the
Plans and to effect the actions  referred to in Section  2.2(c) shall be subject
to the following conditions:

         (a)  Stockholder  Approvals.  This  Agreement,  the Plans and the other
transactions  contemplated  hereby  shall have been  approved and adopted by any
requisite vote or consent of (i) the relevant classes of Trenwick's stockholders
as required by the GCL, Trenwick's  certificate of incorporation and by-laws and
(if  applicable),  the NYSE and (ii) the relevant  classes of LaSalle  Holdings'
shareholders  as required by the Companies Act and (if  applicable) the NYSE and
LaSalle Holdings'  bye-laws,  and orders of the Court sanctioning the Schemes of
Arrangement shall have been obtained.


                                       67

<PAGE>

         (b)      Third Party Consents.

                  (i) Both of Trenwick and LaSalle  Holdings shall have received
                  all  consents and  approvals  required by any lender or equity
                  provider  as  further  set  forth  in  Section  6.1(b)  of the
                  Trenwick  Disclosure Letter and the LaSalle Disclosure Letter,
                  respectively.

                  (ii)  Those   regulatory  and  other  approvals   required  to
                  consummate the Plans and the other  transactions  contemplated
                  hereby,  including but not limited to any  applicable  Lloyd's
                  approval and those  approvals  specified in Section 3.8 of the
                  Trenwick  Disclosure  Letter and  Section  4.8 of the  LaSalle
                  Disclosure Letter, shall have been obtained (without any terms
                  or conditions to such  approvals  which would impose  material
                  and adverse limitations on the ability of New Holdings and its
                  Subsidiaries  to conduct  their  business  after the Effective
                  Time,  which would  require  changes to the terms of the Plans
                  which would be material and adverse to New  Holdings,  LaSalle
                  Holdings or Trenwick or which would  change the  consideration
                  payable  to  shareholders  in  accordance  with the Plans) and
                  shall  remain  in full  force  and  effect  and all  statutory
                  waiting periods in respect thereof shall have expired.

         (c) No Injunctions or Restraints. No order, decree or injunction of any
court or  agency  of  competent  jurisdiction  shall be in  effect,  and no law,
statute  or  regulation  shall  have been  enacted  or  adopted,  that  enjoins,
prohibits or makes illegal consummation of any of the transactions  contemplated
hereby; provided, however, that each of LaSalle Holdings and Trenwick shall have
used all commercially  reasonable efforts to prevent any such rule,  regulation,
injunction,  decree or other  order,  and to appeal as promptly as possible  any
injunction, decree or other order that may be entered.

         (d) Form S-4.  The Form S-4 shall have been  declared  effective by the
SEC and shall not be subject to a stop order or threatened stop order.

         (e) HSR Act. Any waiting period (and any extension thereof)  applicable
to the Plans under the HSR Act shall have terminated or expired.

         (f) NYSE  Listing.  The New Holdings  Shares to be issued to holders of
Trenwick Shares,  LaSalle Holdings Shares and Minority Shares upon  consummation
of the Plans  shall have been  authorized  for  trading on the NYSE,  subject to
official notice of issuance.

         (g) Mayer,  Brown & Platt  Opinion.  New Holdings and LaSalle  Holdings
shall have  received  an opinion of Mayer,  Brown & Platt,  dated the  Effective
Date, on the basis of facts,  representations  and assumptions set forth in such
opinion  that are  consistent  with the facts  existing on the  Effective  Date,
substantially  to the effect that (i) the Schemes of Arrangement will qualify as
an  exchange  under  Section  351(a) of the  Code,  (ii) no gain or loss will be

                                       68

<PAGE>

recognized by United States transferors of LaSalle Holdings Shares who, actually
or  constructively  within the meaning of Section 958 of the Code, own less than
5% of both the  total  voting  power and the  total  value of the  shares of New
Holdings  immediately  after the Plans upon the  receipt of solely New  Holdings
Shares  pursuant  to the Schemes of  Arrangement,  (iii) no gain or loss will be
recognized by United States transferors of LaSalle Holdings Shares who own 5% or
more of the total  voting  power or the total value of the New  Holdings  Shares
immediately  after the Plans  upon the  receipt of solely  New  Holdings  Shares
pursuant  to the  Schemes  of  Arrangement,  provided  that such  United  States
transferors enter into gain recognition  agreements  meeting the requirements of
United States Treasury  Regulation  ss.1.367(a)-8,  (iv) no gain or loss will be
recognized by United States  transferors of Non-Voting  Shares who,  actually or
constructively  within the meaning of Section 958 of the Code,  own less than 5%
of both the total voting power and the total value of the shares of New Holdings
immediately  after the Plans  upon the  receipt of solely  New  Holdings  Shares
pursuant  to the  Schemes  of  Arrangement,  and (v) no  gain  or  loss  will be
recognized  by  United  States  transferors  of  Non-Voting  Shares  who own 5%,
actually or  constructively  within the  meaning of Section 958 of the Code,  or
more of the total  voting  power or the total value of the New  Holdings  Shares
immediately  after the Plans  upon the  receipt of solely  New  Holdings  Shares
pursuant  to the  Schemes  of  Arrangement,  provided  that such  United  States
transferors enter into gain recognition  agreements  meeting the requirements of
United States Treasury Regulation 1.367(a)-8. In rendering such opinion, counsel
may require and rely upon representations  contained in certificates of officers
of LaSalle  Holdings,  LaSalle Re, Trenwick,  New Holdings,  foreign counsel and
others.

         (h) Baker & McKenzie  Opinion.  New Holdings  and  Trenwick  shall have
received an opinion of Baker & McKenzie,  dated the Effective Date, on the basis
of facts,  representations  and  assumptions  set forth in such opinion that are
consistent  with the facts existing on the Effective Date  substantially  to the
effect that (i) no gain or loss will be recognized by United States shareholders
of Trenwick upon the receipt of solely New Holdings  Shares pursuant to the Plan
of Reorganization  (except with respect to cash received in lieu of a fractional
share interest in New Holdings Shares), and (ii) the Plan of Reorganization will
qualify as a tax-free  reorganization  within the meaning of Section 368(a).  In
rendering  such  opinion,  counsel  may  require  and rely upon  representations
contained in certificates of officers of LaSalle Holdings,  LaSalle Re, Trenwick
and New Holdings.

         Section 6.2. Additional  Conditions to Trenwick's  Obligation to Effect
the Plans.  The obligation of Trenwick to consummate the Plans and to effect the
actions  referred to in Section 2.2(c) shall be further subject to the following
conditions unless waived in accordance with Section 8.3:

         (a) Performance of Obligations of LaSalle  Holdings.  LaSalle  Holdings
shall have performed in all material  respects the  obligations and covenants to
be performed by it at or prior to the Effective Time.

         (b) Representations and Warranties.  The representations and warranties
of  LaSalle  Holdings  contained  in this  Agreement  that are  qualified  as to
materiality shall be true and correct and the  representations and warranties of
LaSalle Holdings  contained in this Agreement that are not so qualified shall be
true and correct in all  material  respects,  in each case as of the date of the
Original Agreement and (except to the extent such representations and warranties
speak as of an earlier  date) as of the Closing Date as though made as of and on
the Closing Date, except for such failure or failures to be true and correct (or
true and correct in all material  respects)  as would not have or be  reasonably
expected to have, individually or in the aggregate, a Material Adverse Effect on
LaSalle Holdings.


                                       69

<PAGE>

         (c)  Compliance  with  Conditions.  Trenwick  shall  receive  customary
closing documents in form and substance reasonably satisfactory to it, including
a certificate of an executive officer of LaSalle Holdings certifying  compliance
with the conditions set forth in Sections 6.2(a) and (b).

         (d) Comfort  Letters.  Trenwick  shall have  received  from  Deloitte &
Touche LLP the letters described in Section 5.17(a).

         (e) Consents and Approvals.  Trenwick shall have received evidence,  in
form  and  substance  reasonably  satisfactory  to it,  that  all  consents  and
approvals  set forth in Section 4.8 of the LaSalle  Disclosure  Letter have been
obtained.

         (f) Fiduciary Duties.  The Board of Directors of LaSalle Holdings shall
not have (A)  withdrawn  or modified or changed in a manner  adverse to Trenwick
its approval or  recommendation of this Agreement in order to approve and permit
LaSalle  Holdings  to  execute  a  definitive  agreement  relating  to a LaSalle
Holdings  Superior  Proposal  (as  defined  in  Section  5.3(b)(ii)),   and  (B)
determined  in good faith,  after  consultation  with outside  legal  counsel to
LaSalle  Holdings  that the  failure  to take  such  action  as set forth in the
preceding  clause  (A) is  reasonably  likely  to  result  in the  breach of the
respective Board of Directors' fiduciary duties under applicable law.

         (g) Baker & McKenzie  Opinion.  New Holdings  and  Trenwick  shall have
received an opinion of Baker & McKenzie,  dated the Effective Date, on the basis
of facts,  representations  and  assumptions  set forth in such opinion that are
consistent  with the facts existing on the Effective Date  substantially  to the
effect  that  Trenwick  shall  treat  the Plan of  Reorganization  as a  taxable
disposition of assets directly held by Trenwick,  but that Trenwick shall not be
subject to U.S.  federal  income tax in excess of $60.0  million with respect to
such  gain.  In  rendering  such  opinion,  counsel  may  require  and rely upon
representations  contained  in  certificates  of officers  of LaSalle  Holdings,
LaSalle Re, Trenwick and New Holdings,  including  representations regarding the
adjusted tax basis of the assets of Trenwick.  In  addition,  in rendering  such
opinion,  counsel  may  require and rely upon  opinions  prepared  by  valuation
experts,  including  opinions  regarding  the fair market value of the assets of
Trenwick, foreign counsel and others.

         (h) No  Material  Adverse  Change.  At any time  after  the date of the
Original  Agreement  there shall not have occurred any Material  Adverse  Change
relating to LaSalle Holdings;  provided,  that this condition shall no longer be
applicable following the approval of the LaSalle Holdings' shareholders.


                                       70

<PAGE>

         Section 6.3. Additional  Conditions to LaSalle Holdings'  Obligation to
Effect the Plans. The obligation of LaSalle Holdings to consummate the Plans and
to effect the actions  referred to in Section 2.2(c) shall be further subject to
the following conditions unless waived in accordance with Section 8.3:

         (a)  Performance  of  Obligations  of  Trenwick.  Trenwick  shall  have
performed in all material respects the obligations and covenants to be performed
by it at or prior to the Effective Time.

         (b) Representations and Warranties.  The representations and warranties
of Trenwick  contained in this  Agreement  that are qualified as to  materiality
shall be true and correct and the  representations  and  warranties  of Trenwick
contained in this Agreement that are not so qualified  shall be true and correct
in all material respects,  in each case as of the date of the Original Agreement
and (except to the extent such  representations  and  warranties  speak as of an
earlier date) as of the Closing Date  (immediately  prior to the Effective  Time
and after  giving  effect to any  internal  reorganizations  of Trenwick and its
Subsidiaries),  as though made as of and on the Closing Date (immediately  prior
to the Effective Time and after giving effect to any internal reorganizations of
Trenwick and its  Subsidiaries),  except for such failure or failures to be true
and correct (or true and correct in all material  respects) as would not have or
be reasonably  expected to have,  individually  or in the aggregate,  a Material
Adverse Effect on Trenwick.

         (c)  Compliance  with   Conditions.   LaSalle  Holdings  shall  receive
customary closing documents in form and substance reasonably satisfactory to it,
including  a  certificate  of  an  executive  officer  of  Trenwick   certifying
compliance with the conditions set forth in Sections 6.3(a) and (b).

         (d)  Comfort  Letters.   LaSalle  Holdings  shall  have  received  from
PricewaterhouseCoopers LLP the letters described in Section 5.17(b).

         (e)  Consents  and  Approvals.  LaSalle  Holdings  shall have  received
evidence, in form and substance reasonably satisfactory to it, that all consents
and  approvals set forth in Section 3.8 of the Trenwick  Disclosure  Letter have
been obtained.

         (f) Rights  Agreement.  Trenwick shall have taken all necessary  action
pursuant to Section 3.20 so that, as of immediately prior to the Effective Time,
(i)  none  of  Trenwick,  New  Holdings  and  LaSalle  Holdings  will  have  any
obligations under the Rights or the Rights Agreement and (ii) the holders of the
Rights will have no rights under the Rights or the Rights Agreement.

         (g) Fiduciary Duties. The Board of Directors of Trenwick shall not have
(A) withdrawn or modified or changed in a manner adverse to LaSalle Holdings its
approval  or  recommendation  of this  Agreement  in order to approve and permit
Trenwick  to execute a  definitive  agreement  relating  to a Trenwick  Superior
Proposal (as defined in Section  5.3(a)(ii)),  and (B) determined in good faith,
after  consultation  with outside  legal counsel to Trenwick that the failure to
take such action as set forth in the preceding  clause (A) is reasonably  likely
to result in the breach of the respective  Board of Directors'  fiduciary duties
under applicable law.


                                       71

<PAGE>

         (h) Baker & McKenzie Opinion. In addition to those matters set forth in
Section  6.3(h) of the  Trenwick  Disclosure  Letter,  New Holdings and Trenwick
shall have received an opinion of Baker & McKenzie, dated the Effective Date, on
the basis of facts,  representations  and  assumptions set forth in such opinion
that are consistent with the facts existing on the Effective Date  substantially
to the effect that Trenwick shall treat the Plan of  Reorganization as a taxable
disposition of assets directly held by Trenwick,  but that Trenwick shall not be
subject to U.S.  federal  income tax in excess of $40.0  million with respect to
such  gain.  In  rendering  such  opinion,  counsel  may  require  and rely upon
representations  contained  in  certificates  of officers  of LaSalle  Holdings,
LaSalle Re, Trenwick and New Holdings,  including  representations regarding the
adjusted tax basis of the assets of Trenwick.  In  addition,  in rendering  such
opinion,  counsel  may  require and rely upon  opinions  prepared  by  valuation
experts,  including  opinions  regarding  the fair market value of the assets of
Trenwick, foreign counsel and others.

         (i) No  Material  Adverse  Change.  At any time  after  the date of the
Original  Agreement,  there shall not have occurred any Material  Adverse Change
relating  to  Trenwick;  provided,  that  this  condition  shall  no  longer  be
applicable following the approval of the Trenwick stockholders.


                                    ARTICLE 7

                           TERMINATION AND ABANDONMENT

         Section  7.1.  Termination  by Trenwick or LaSalle  Holdings.  Anything
herein  contained  to  the  contrary  notwithstanding,  this  Agreement  may  be
terminated and the Plans contemplated  hereby may be abandoned at any time prior
to the  Effective  Time,  whether  before or after  approval of the Plans by the
shareholders of LaSalle Holdings and LaSalle Re or the stockholders of Trenwick,
respectively:

         (a)     by the mutual written consent of LaSalle Holdings and Trenwick;

         (b)     by either  LaSalle  Holdings or  Trenwick by  written notice to
the other:

                  (i) if the Effective Time shall not have occurred on or before
                  June 30, 2000; provided,  however, that the right to terminate
                  this  Agreement  under  this  Section  7.1(b)(i)  shall not be
                  available to any party whose failure to fulfill any obligation
                  under this  Agreement  has been the cause of, or resulted  in,
                  the failure of the  Effective  Time to occur on or before such
                  date;

                  (ii) if a Governmental Authority shall have issued a final and
                  nonappealable  order,  decree  or  ruling  or taken  any other
                  action  (which  order,  decree,  ruling  or other  action  the
                  parties hereto shall use their commercially reasonable efforts
                  to lift), in each case, permanently restraining,  enjoining or
                  otherwise  prohibiting the  transactions  contemplated by this
                  Agreement and such order, decree, ruling or other action shall
                  have become final and nonappealable;

                                       72

<PAGE>

                  (iii) if the required  approval of the classes of stockholders
                  of  Trenwick  shall  not have been  obtained  by reason of the
                  failure to obtain the required  vote at a duly held meeting of
                  such  stockholders  or  at  any  adjournment  or  postponement
                  thereof; provided, that, if the terminating party is Trenwick,
                  Trenwick  shall not be in material  breach of its  obligations
                  under Section 5.8;

                  (iv) if the required  approval of the  shareholders of LaSalle
                  Holdings and LaSalle Re shall not have been obtained by reason
                  of the  failure  to obtain  the  required  vote at a duly held
                  meeting  of  such   shareholders  or  at  any  adjournment  or
                  postponement thereof; provided, that, if the terminating party
                  is LaSalle Holdings, LaSalle Holdings shall not be in material
                  breach of its obligations under Section 5.8; or

                  (v) if any single  natural  catastrophe  shall  have  occurred
                  which would  result in Net Losses to LaSalle  Holdings and its
                  Subsidiaries   or  to  Trenwick   and  its   Subsidiaries   of
                  $100,000,000 or more.

         Section 7.2.      Termination by Trenwick.

         (a) Trenwick may terminate this  Agreement  prior to the Effective Time
if LaSalle  Holdings (x) breaches or fails in any material respect to perform or
comply with any of its covenants and agreements contained herein or (y) breaches
its  representations  or  warranties  and  such  breach  would  have or would be
reasonably  likely to have a Material Adverse Effect on LaSalle Holdings and its
Subsidiaries,  in each case such that the conditions set forth in Section 6.2(a)
or 6.2(b)  would not be  satisfied;  provided,  however,  that if such breach is
cured by the  breaching  party within ten (10) days  following  the discovery of
such breach,  Trenwick may not terminate this Agreement pursuant to this Section
7.2.

         (b) Trenwick may terminate this  Agreement  prior to the Effective Time
if LaSalle Holdings has (A) withdrawn or modified or changed in a manner adverse
to Trenwick its approval or recommendation of this Agreement,  or (B) determined
in good faith, after consultation with outside legal counsel to LaSalle Holdings
that the failure to take such action as set forth in the preceding clause (A) is
reasonably  likely to result in the breach of the respective Board of Directors'
fiduciary duties under applicable law.

         (c) Prior to the Effective Time,  Trenwick may terminate this Agreement
as provided in Section  5.3(a)(ii);  provided,  that  Trenwick  shall have given
LaSalle  Holdings  forty-eight  (48)  hours  advance  notice of any  termination
pursuant  to this  Section  7.2(b) and that  Trenwick  shall  have paid  LaSalle
Holdings the Trenwick  Termination Fee required to be paid by Trenwick  pursuant
to Section 7.4(b) hereof. Trenwick agrees to notify LaSalle Holdings promptly if
it is no longer prepared to accept the Trenwick Superior Proposal.


                                       73

<PAGE>

         Section 7.3.      Termination by LaSalle Holdings.

         (a)  LaSalle  Holdings  may  terminate  this  Agreement  prior  to  the
Effective  Time if Trenwick  (x)  breaches or fails in any  material  respect to
perform or comply with any of its covenants and agreements  contained  herein or
(y) breaches its  representations  or  warranties  and such breach would have or
would be reasonably likely to have a Material Adverse Effect on Trenwick and its
Subsidiaries,  in each case such that the conditions set forth in Section 6.3(a)
or 6.3(b)  would not be  satisfied;  provided,  however,  that if such breach is
cured by the  breaching  party within ten (10) days  following  the discovery of
such breach,  LaSalle Holdings may not terminate this Agreement pursuant to this
Section 7.3(a).

         (b)  LaSalle  Holdings  may  terminate  this  Agreement  prior  to  the
Effective  Time if Trenwick has (A) withdrawn or modified or changed in a manner
adverse to LaSalle Holdings its approval or recommendation of this Agreement, or
(B) determined in good faith,  after  consultation with outside legal counsel to
Trenwick  that the  failure to take such  actions as set forth in the  preceding
clause (A) is reasonably  likely to result in the breach of the respective Board
of Directors' fiduciary duties under applicable law.

         (c) Prior to the Effective  Time,  LaSalle  Holdings may terminate this
Agreement as provided in Section  5.3(b)(ii);  provided,  that LaSalle  Holdings
shall  have  given  Trenwick  forty-eight  (48)  hours  advance  notice  of  any
termination pursuant to this Section 7.3(b) and that LaSalle Holdings shall have
paid  Trenwick  the  LaSalle  Termination  Fee  required  to be paid by  LaSalle
Holdings  pursuant to Section 7.4(c) hereof.  LaSalle  Holdings agrees to notify
Trenwick  promptly if it is no longer  prepared  to accept the LaSalle  Holdings
Superior Proposal.

         Section 7.4.      Procedure and Effect of Termination.

         (a) In the event of the  termination of this  Agreement,  except as set
forth in Section  7.4(b) and Section  7.4(c),  none of the parties  hereto shall
have  any  obligation  to  perform  hereunder  from and  after  the date of such
termination,    except   that   Sections   5.4   (the   last   sentence    only)
(Confidentiality),  5.6 (Public Announcements),  8.5 (Expenses and Obligations),
8.7 (Notices) and 8.8 (Governing Law) shall survive such  termination and remain
in full force and effect notwithstanding such termination. No termination hereof
shall relieve any party from any liability  resulting  from any breach of any of
its  representations,  warranties,  covenants  or  agreements  set forth in this
Agreement.

         (b) If this  Agreement  is  terminated  by (i) any  party  pursuant  to
Section 7.1(b)(i) or 7.1(b)(iii),  and in either case there shall have been made
or commenced a Trenwick  Takeover  Proposal,  which Trenwick  Takeover  Proposal
shall not have been absolutely and unconditionally withdrawn and abandoned as of
the date of such termination,  (ii) Trenwick pursuant to Section 7.2(c) or (iii)
LaSalle  Holdings  pursuant  to Section  7.3(a) if there is a Trenwick  Takeover
Proposal  outstanding  at the time of the breach or 7.3(b),  then Trenwick shall
pay LaSalle  Holdings a  non-refundable  termination  fee of  $12,000,000,  plus
expenses not to exceed $2,000,000 (the "Trenwick Termination Fee"), which amount
shall be payable by wire transfer of same-day funds prior to, and as a condition
of, the effectiveness of such termination.


                                       74
<PAGE>

         (c) If this  Agreement  is  terminated  by (i) any  party  pursuant  to
Section 7.1(b)(i) or 7.1(b)(iii),  and in either case there shall have been made
or  commenced a LaSalle  Holdings  Takeover  Proposal,  which  LaSalle  Holdings
Takeover Proposal shall not have been absolutely and  unconditionally  withdrawn
and abandoned as of the date of such termination, (ii) LaSalle Holdings pursuant
to Section  7.3(c) or (iii)  Trenwick  pursuant to Section  7.2(a) if there is a
LaSalle  Holdings  Takeover  Proposal  outstanding  at the time of the breach or
7.2(b),  then LaSalle Holdings shall pay Trenwick a  non-refundable  termination
fee of  $12,000,000,  plus  expenses  not to  exceed  $2,000,000  (the  "LaSalle
Termination  Fee"),  which amount shall be payable by wire  transfer of same-day
funds prior to, and as a condition of, the effectiveness of such termination.


                                    ARTICLE 8

                            MISCELLANEOUS PROVISIONS

         Section 8.1. Non-Survival of Representations, Warranties, Covenants and
Agreements.  None of the  representations,  warranties,  covenants or agreements
contained in this Agreement or in any Disclosure Letter, Exhibit or any document
delivered pursuant to this Agreement shall survive the Closing, except for those
covenants and  agreements  contained in this Agreement that by their terms apply
or are to be performed in whole or in part after the Closing.

         Section 8.2.  Amendment and  Modification.  Subject to applicable  law,
this  Agreement  may be  amended,  modified  or  supplemented  only  by  written
agreement  signed  on  behalf  of each  party  hereto  at any time  prior to the
Effective Time with respect to any of the terms contained herein except that (i)
after the meetings of the  stockholders  of Trenwick as  contemplated by Section
5.8, Trenwick Consideration to be paid pursuant to this Agreement to the holders
of Trenwick Shares shall in no event be decreased and the form of  consideration
to be  received  by  the  holders  of  such  Trenwick  Shares  in  the  Plan  of
Reorganization  shall  in no event  be  altered  without  the  approval  of such
holders,  (ii) after the  meetings of the  shareholders  of LaSalle  Holdings as
contemplated by Section 5.8,  LaSalle  Consideration to be paid pursuant to this
Agreement  to the  holders  of  LaSalle  Holdings  Shares  shall  in no event be
decreased  and the form of  consideration  to be received by the holders of such
LaSalle  Holdings  Shares in the  Schemes  of  Arrangement  shall in no event be
altered  without the approval of such  holders,  and (iii) after the meetings of
the stockholders of Trenwick,  LaSalle Holdings or LaSalle Re as contemplated by
Section  5.8,  there shall be made no  amendment  that by law  requires  further
approval by such stockholders without the further approval of such stockholders.


                                       75

<PAGE>

         Section 8.3.      Waiver of Compliance; Consents.

         (a) Any  failure  of any party to this  Agreement  to  comply  with any
obligation,  covenant,  agreement or  condition  herein may be waived by written
instrument  executed by each other party to this  Agreement,  but such waiver or
failure  to  insist  upon  strict  compliance  with such  obligation,  covenant,
agreement  or  condition  shall not  operate  as a waiver of, or  estoppel  with
respect to, any subsequent or other failure.

         (b) Whenever this Agreement requires or permits consent by or on behalf
of any  party  hereto,  such  consent  shall  be given  in  writing  in a manner
consistent with the requirements for a waiver of compliance as set forth in this
Section 8.3.

         Section 8.4.  Severability  and Validity.  The  provisions set forth in
this Agreement are severable. If any term, provision, covenant or restriction of
this Agreement is held by record of competent jurisdiction or other authority to
be invalid,  void or unenforceable in any jurisdiction or against its regulatory
or public policy,  the remainder of this Agreement,  and the application of such
provision to other Persons or  circumstances,  shall not be affected thereby and
shall remain valid and enforceable in such jurisdiction, and any such invalidity
or   unenforceability  in  any  jurisdiction  shall  not  invalidate  or  render
unenforceable  such provision in any other  jurisdiction.  Upon a  determination
that  any  term,  provision,   covenant  or  restriction  is  invalid,  void  or
unenforceable  or  against  the  regulatory  or public  policy of the  governing
jurisdiction,  the parties  hereto shall  negotiate in good faith to modify this
Agreement  so as to effect  the  original  intent of the  parties  as closely as
possible to the fullest  extent  permitted by  applicable  law in an  acceptable
manner  to the end that the  transactions  contemplated  by this  Agreement  are
fulfilled to the extent possible.

         Section 8.5.      Expenses and Obligations.  Each of the  parties shall
pay its own expenses incurred in connection with the negotiation and preparation
of the Original  Agreement and this Agreement,  the performance of its covenants
herein and therein and the effectuation of the transactions  contemplated hereby
and thereby,  including,  without limitation,  all fees and disbursements of its
respective legal counsel,  advisors and  accountants;  provided,  however,  that
nothing in this  Section  8.5 shall  negate  any  obligation  of either  LaSalle
Holdings or Trenwick to pay the termination fee specified in Sections 7.4(b) and
(c).  Each of the LaSalle  Holdings and Trenwick  shall bear and pay one-half of
the filing fees, printing expenses and mailing costs incurred in connection with
(1) the  filing,  printing  and  mailing  of the  Form S-4 and the  Joint  Proxy
Statement  (including  SEC  filing  fees) and (2) the  filings  of any  required
premerger  notification  and report  forms under the HSR Act  (including  filing
fees) and one-half of the fees of the Settlement  Auditor. In the event that the
transactions  contemplated  by this Agreement are not  consummated,  each of the
parties shall  indemnify  and hold harmless the other parties  against any claim
for fees or  commissions  of  brokers,  finders,  agents or bankers  retained or
purportedly retained by the indemnitor party in connection with the transactions
contemplated by this Agreement.

         Section 8.6.      Parties in Interest. This  Agreement shall be binding
upon and inure  solely to the  benefit of each party  hereto and nothing in this
Agreement,  express or implied,  is intended to confer upon any other Person any
rights  or  remedies  of any  nature  whatsoever  under  or by  reason  of  this
Agreement,  except for Section  5.13 (which is intended to be for the benefit of
the Persons referred to therein and may be enforced by such Persons).


                                       76

<PAGE>

         Section 8.7. Notices. All notices,  requests, claims, demands and other
communications  hereunder  shall be in writing  and shall be given (and shall be
deemed to have been duly given upon receipt) by delivery in person, by facsimile
(which is confirmed) or sent by overnight courier  (providing proof of delivery)
or by registered or certified mail (postage prepaid,  return receipt requested),
to the other  party at the  following  address  (or at such other  address for a
party as shall be specified by like notice):

         if to LaSalle Holdings before the Effective Date, to:

                  LaSalle Re Holdings Limited
                  25 Church Street
                  P.O. Box HM 1502
                  Hamilton HM FX, Bermuda
                  Fax: (441) 292-2656
                  Attention: Guy D. Hengesbaugh

         with a copy to:

                  Mayer, Brown & Platt
                  190 South LaSalle Street
                  Chicago, Illinois 60603
                  Fax: (312) 701-7711
                  Attention: Richard W. Shepro, Esq.

         if to Trenwick before the Effective Date, to:

                  Trenwick Group Inc.
                  One Canterbury Green
                  Stamford, Connecticut 06901
                  Fax: (203) 353-5550
                  Attention: John V. Del Col, Esq.

         with a copy to:

                  Baker & McKenzie
                  805 Third Avenue
                  New York, New York 10022
                  Fax: (212) 891-3835
                  Attention: James R. Cameron, Esq.


                                       77
<PAGE>

         if to LaSalle Holdings, Trenwick or New  Holdings after  the  Effective
 Date:

                  Gowin Holdings International Limited
                  c/o Appleby Spurling & Kempe
                  Cedar House
                  41 Cedar Avenue
                  P.O. Box HM 1178
                  Hamilton HM EX, Bermuda
                  Fax: (441) 292-8666
                  Attention: Warren Cabral, Esq.

         with a copy to:

                  Baker & McKenzie
                  805 Third Avenue
                  New York, New York 10022
                  Fax: (212) 891-3835
                  Attention: James R. Cameron, Esq.

or to such  other  address  as the  person  to whom  notice  is  given  may have
previously furnished to the other in writing in the manner set forth above.

         Section  8.8.  Governing  Law.  Except for  Article  2, which  shall be
governed by and construed in  accordance  with the laws of Bermuda and Delaware,
as applicable  according to the context thereof (i.e.,  with matters relating to
the Schemes of Arrangement being governed by Bermuda law and matters relating to
the Plan of Reorganization being governed by Delaware law), this Agreement shall
be  governed  by and  construed  in  accordance  with the  laws of the  State of
Delaware,  without regard to the conflicts of laws rules  thereof.  In addition,
each of the  parties  hereto  (a)  consents  to submit  itself  to the  personal
jurisdiction  of any Delaware  Court in the event any dispute arises out of this
Agreement or any of the  transactions  contemplated  by this  Agreement  and (b)
agrees that it will not attempt to deny or defeat such personal  jurisdiction or
venue by motion or other request for leave from any such Delaware Court, and (c)
agrees that it will not bring any action  relating to this  Agreement  or any of
the  transactions  contemplated  by this  Agreement  in any court other than any
Delaware Court.

         Section 8.9.  Counterparts.  This  Agreement  may be executed in two or
more counterparts, each of which shall be an original, and all of which shall be
considered  one and the same  agreement and shall become  effective  when one or
more  counterparts  have been signed by each of the parties and delivered to the
other party.

         Section 8.10.  Headings.  The Article and Section headings contained in
this  Agreement  are solely for the  purpose of  reference,  are not part of the
agreement  of the  parties  and  shall  not  affect  in any way the  meaning  or
interpretation  of this  Agreement.  References to Articles or Sections,  unless
otherwise specified, are to Articles and Sections of this Agreement.


                                       78

<PAGE>

         Section 8.11. Entire Agreement;  Assignment. This Agreement,  including
the  documents  and  instruments   referred  to  herein  and  therein,  and  the
Confidentiality  Letters embodies the entire agreement and  understanding of the
parties  hereto in respect of the subject matter  contained  herein and therein.
There are no agreements,  restrictions,  promises, representations,  warranties,
covenants or  undertakings,  other than those expressly set forth or referred to
herein.  This  Agreement  supersedes  all prior  agreements  and  understandings
between the parties with respect to such subject  matters.  This Agreement shall
not be assigned by operation of law or otherwise,  except with the prior written
consent of each other party hereto; provided, that the transactions contemplated
by Section  2.1(b) shall not be  considered an assignment by operation of law or
otherwise for purposes of this Section 8.11.  Any assignment in violation of the
preceding sentence shall be void.  Subject to the preceding two sentences,  this
Agreement will be binding upon,  inure to the benefit of, and be enforceable by,
the parties and their respective successors and assigns.

         Section  8.12.  Interpretation.  When  a  reference  is  made  in  this

Agreement to an Article,  Section,  Exhibit,  Letter or Schedule, such reference
shall be to an Article or Section of, or an Exhibit, Letter or Schedule to, this
Agreement  unless  otherwise  indicated.  The  table of  contents  and  headings
contained in this Agreement are for reference purposes only and shall not affect
in any way the meaning or interpretation  of this Agreement.  Whenever the words
"include,"  "includes" or "including" are used in this Agreement,  they shall be
deemed to be  followed  by the words  "without  limitation."  The  phrase  "made
available" in this  Agreement  shall mean that the  information  referred to has
been made available if requested by the party to whom such  information is to be
made available.  The words  "hereof",  "herein" and "hereunder" and the words or
similar  import when used in this  Agreement  shall refer to this Agreement as a
whole and not to any particular  provision of this Agreement.  All terms defined
in this Agreement  shall have the defined  meanings when used in any certificate
or other document made or delivered  pursuant  hereto unless  otherwise  defined
therein.  The  definitions  contained in this  Agreement  are  applicable to the
singular as well as the plural forms of such terms and to the  masculine as well
as to the feminine and neuter genders of such term. Any agreement, instrument or
statute  defined or referred to herein or in any agreement or instrument that is
referred to herein means such  agreement,  instrument or statute as from time to
time amended, modified or supplemented,  including (in the case of agreements or
instruments) by waiver or consent and (in the case of statutes) by succession of
comparable successor statutes.  References to a person are also to its permitted
successors and assigns.



                                       79

<PAGE>



         IN  WITNESS  WHEREOF,  each  of the  parties  hereto  has  caused  this
Agreement to be signed and sealed on its behalf by its duly authorized officers,
all as of the day and year first above written.

                                       LASALLE RE HOLDINGS LIMITED

                                       By: /s/  Guy D. Hengesbaugh
                                           -------------------------------
                                       Name:   Guy D. Hengesbaugh
                                       Title:  President and Chief Executive
                                               Officer


                                       LASALLE RE LIMITED

                                       By: /s/  Guy D. Hengesbaugh
                                           -------------------------------
                                       Name:   Guy D. Hengesbaugh
                                       Title:  President and Chief Executive
                                               Officer


                                       GOWIN HOLDINGS INTERNATIONAL LIMITED

                                       By: /s/ John V. Del Col
                                           -------------------------------
                                       Name:   John V. Del Col
                                       Title:  Director


                                       TRENWICK GROUP INC.

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






                                       80

<PAGE>



         IN WITNESS  WHEREOF,  Trenwick  Group  (Delaware)  Inc. has caused this
Agreement to be signed and sealed on its behalf by its duly authorized  officer,
all as of the day and year first written above in accordance with Section 8.2 of
the Original Agreement to reflect its agreement to the amendment and restatement
of the  Original  Agreement  but  agrees  that it is no  longer  a party to this
Agreement.


                                       TRENWICK GROUP (DELAWARE) INC.


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















                                       81







© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission