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                                                                    EXHIBIT 25.6

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM T-1
                                    --------

                            STATEMENT OF ELIGIBILITY
                      UNDER THE TRUST INDENTURE ACT OF 1939
                  OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE

                CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY
                   OF A TRUSTEE PURSUANT TO SECTION 305(B)(2)

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

                  BANK ONE TRUST COMPANY, NATIONAL ASSOCIATION
               (EXACT NAME OF TRUSTEE AS SPECIFIED IN ITS CHARTER)

 A NATIONAL BANKING ASSOCIATION                           31-0838515
                                                          (I.R.S. EMPLOYER
                                                          IDENTIFICATION NUMBER)

100 EAST BROAD STREET, COLUMBUS, OHIO                     43271-0181
(ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)                  (ZIP CODE)


                          BANK ONE TRUST COMPANY, N.A.
                                1 BANK ONE PLAZA
                             CHICAGO, ILLINOIS 60670
    ATTN: SANDRA L. CARUBA, FIRST VICE PRESIDENT AND COUNSEL, (312) 336-9436
            (NAME, ADDRESS AND TELEPHONE NUMBER OF AGENT FOR SERVICE)

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

                               TRENWICK GROUP LTD.
               (EXACT NAME OF OBLIGOR AS SPECIFIED IN ITS CHARTER)

BERMUDA                                                   98-0232340
(STATE OR OTHER JURISDICTION OF                           (I.R.S. EMPLOYER
INCORPORATION OR ORGANIZATION)                            IDENTIFICATION NUMBER)

                              CONTINENTAL BUILDING
                                25 CHURCH STREET
                                 HAMILTON, HM12
                                     BERMUDA
                    (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)


    GUARANTEES WITH RESPECT TO TRUST PREFERRED SECURITIES OF TRENWICK AMERICA
CAPITAL TRUST I, TRENWICK AMERICA CAPITAL TRUST II, AND TRENWICK AMERICA CAPITAL
                                   TRUST III
                         (TITLE OF INDENTURE SECURITIES)



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ITEM 1.         GENERAL INFORMATION.  FURNISH THE FOLLOWING INFORMATION AS TO
                THE TRUSTEE:

                (A)     NAME AND ADDRESS OF EACH EXAMINING OR SUPERVISING
                AUTHORITY TO WHICH IT IS SUBJECT.

                Comptroller of Currency, Washington, D.C.; Federal Deposit
                Insurance Corporation, Washington, D.C.; The Board of Governors
                of the Federal Reserve System, Washington D.C.

                (B)     WHETHER IT IS AUTHORIZED TO EXERCISE CORPORATE TRUST
                POWERS.

                The trustee is authorized to exercise corporate trust powers.

ITEM 2.         AFFILIATIONS WITH THE OBLIGOR.  IF THE OBLIGOR IS AN AFFILIATE
                OF THE TRUSTEE, DESCRIBE EACH SUCH AFFILIATION.

                No such affiliation exists with the trustee.

ITEM 16.        LIST OF EXHIBITS.   LIST BELOW ALL EXHIBITS FILED AS A PART OF
                THIS STATEMENT OF ELIGIBILITY.

                1.    A copy of the articles of association of the trustee now
                      in effect.*

                2.    A copy of the certificate of authority of the trustee to
                      commence business.*

                3.    A copy of the authorization of the trustee to exercise
                      corporate trust powers.*

                4.    A copy of the existing by-laws of the trustee.*

                5.    Not Applicable.

                6.    The consent of the trustee required by Section 321(b) of
                      the Act.





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                7.    A copy of the latest report of condition of the trustee
                      published pursuant to law or the requirements of its
                      supervising or examining authority.

                8.    Not Applicable.

                9.    Not Applicable.

        Pursuant to the requirements of the Trust Indenture Act of 1939, as
amended, the trustee, Bank One Trust Company, National Association, a national
banking association organized and existing under the laws of the United States
of America, has duly caused this Statement of Eligibility to be signed on its
behalf by the undersigned, thereunto duly authorized, all in the City of Chicago
and State of Illinois, on the 12th day of June, 2001.


                  BANK ONE TRUST COMPANY, NATIONAL ASSOCIATION,
                  TRUSTEE


                  BY /S/ SANDRA L. CARUBA
                     SANDRA L. CARUBA
                     FIRST VICE PRESIDENT





* Exhibits 1, 2, 3, and 4 are herein incorporated by reference to Exhibits
bearing identical numbers in Item 16 of the Form T-1 of Bank One Trust Company,
National Association, filed as Exhibit 25 to the Registration Statement on Form
S-3 of Burlington Northern Santa Fe Corporation, filed with the Securities and
Exchange Commission on May 10, 2000 (Registration No. 333-36718).






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                                    EXHIBIT 6



                       THE CONSENT OF THE TRUSTEE REQUIRED
                          BY SECTION 321(b) OF THE ACT


                                                   June 12, 2001



Securities and Exchange Commission
Washington, D.C.  20549

Ladies and Gentlemen:

In connection with the qualification of a guarantee agreement between Trenwick
Group Ltd. and Bank One Trust Company, National Association, as Trustee, the
undersigned, in accordance with Section 321(b) of the Trust Indenture Act of
1939, as amended, hereby consents that the reports of examinations of the
undersigned, made by Federal or State authorities authorized to make such
examinations, may be furnished by such authorities to the Securities and
Exchange Commission upon its request therefor.


                             Very truly yours,

                             BANK ONE TRUST COMPANY, NATIONAL ASSOCIATION


                             BY: /S/ SANDRA L. CARUBA
                                     SANDRA L. CARUBA
                                     FIRST VICE PRESIDENT



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                                    EXHIBIT 7

                                                                                              
Legal Title of Bank:              Bank One Trust Company, N.A.   Call Date: 3/31/01     State #:  39158   FFIEC 041
Address:                          100 Broad Street               Vendor ID:  D          Cert #:  21377     Page RC-1
City, State  Zip:                 Columbus, OH 43271             Transit #:  04400003



CONSOLIDATED REPORT OF CONDITION FOR INSURED COMMERCIAL
AND STATE-CHARTERED SAVINGS BANKS FOR MARCH 31, 2001

All schedules are to be reported in thousands of dollars. Unless otherwise
indicated, report the amount outstanding of the last business day of the
quarter.




                                                                                                 Dollar Amounts in thousands  C300
1.  Cash and balances due from depository institutions (from Schedule RC-A):                     RCON    BIL MIL THOU         ----
                                                                                                 ----    ------------
                                                                                                                     
    a. Noninterest-bearing balances and currency and coin(1) .................................   0081      57,409             1.a
    b. Interest-bearing balances(2) ..........................................................   0071           0             1.b
2.  Securities
    a. Held-to-maturity securities(from Schedule RC-B, column A) .............................   1754           0             2.a
    b. Available-for-sale securities (from Schedule RC-B, column D) ..........................   1773       1,922             2.b
3.  Federal funds sold and securities purchased under agreements to resell ...................   1350     771,209             3.
4.  Loans and lease financing receivables: (from Schedule RC-C):                                 RCON
                                                                                                 ----
    a. Loans and leases held for sale ........................................................   5369           0             4.a
    b. Loans and leases, net of unearned income ..............................................   B528      84,428             4.b
    c. LESS: Allowance for loan and lease losses .............................................   3123         387             4.c
    d. Loans and leases, net of unearned income and allowance
       (item 4.b minus 4.c) ..................................................................   B529      84,041             4.d
5.  Trading assets (from Schedule RC-D) ......................................................   3545           0             5.
6.  Premises and fixed assets (including capitalized leases) .................................   2145      21,125             6.
7.  Other real estate owned (from Schedule RC-M) .............................................   2150           0             7.
8.  Investments in unconsolidated subsidiaries and associated companies
    (from Schedule RC-M) .....................................................................   2130           0             8.
9.  Customers' liability to this bank on acceptances outstanding .............................   2155           0             9.
10. Intangible assets.........................................................................
    a. Goodwill ..............................................................................   3163           0             10.a
    b. Other intangible assets (from Schedule RC-M) ..........................................   0426      12,971             10.b
11. Other assets (from Schedule RC-F) ........................................................   2160     317,034             11.
12. Total assets (sum of items 1 through 11) .................................................   2170   1,265,711             12.




(1)  Includes cash items in process of collection and unposted debits.
(2)  Includes time certificates of deposit not held for trading.




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Legal Title of Bank:         Bank One Trust Company, N.A.   Call Date:  3/31/01    State #:  3915  FFIEC 041
Address:                     100 East Broad Street          Vendor ID:  D          Cert #"  21377  Page RC-2
City, State  Zip:            Columbus, OH 43271             Transit #:  04400003





Schedule RC-Continued
                                                                                                Dollar Amounts in
                                                                                                Thousands
                                                                                                ---------

13. Deposits:                                                                    RCON
    a. In domestic offices (sum of totals of columns A and C from                ----
                                                                                                 
       Schedule RC-E)  ...........................................               2200           995,556   13.a
       (1) Noninterest-bearing(1) ................................               6631           558,282   13.a1
       (2) Interest-bearing.......................................               6636           437,274   13.a2
    b. Not applicable
14. Federal funds purchased and securities sold under agreements
    to repurchase                                                                RCFD 2800            0   14.
15. Trading Liabilities(from Sechedule RC-D)......................               RCFD 3548            0   15.
16. Other borrowed money (includes mortgage indebtedness and
    obligations under capitalized leases) (from Schedule RC-M)....               3190                 0   16.
17. Not applicable
18. Bank's liability on acceptances executed and outstanding .....               2920                 0   18.
19. Subordinated notes and debentures (2) ........................               3200                 0   19.
20. Other liabilities (from Schedule RC-G) .......................               2930           125,576   20.
21. Total liabilities (sum of items 13 through 20) ...............               2948         1,121,132   21.
22. Minority interest in consolidated subsidiaries ...............               3000                 0   22.
EQUITY CAPITAL
23. Perpetual preferred stock and related surplus ................               3838                 0   23.
24. Common stock                                                                 3230               800   24.
25. Surplus (exclude all surplus related to preferred stock) .....               3839            45,157   25.
26. a. Retained earnings .........................................               3632            98,597   26.a
    b. Accumulated other comprehensive income (3) ................               B530                25   26.b
27. Other equity capital components (4) ..........................               A130                 0   27.
28. Total equity capital (sum of items 23 through 27) ............               3210           144,579   28.
29. Total liabilities, minority interest, and equity
    capital (sum of items 21, 22, and 28)  .......................               3300         1,265,711   29.



Memorandum
To be reported only with the March Report of Condition.

                                                                                            
1.  Indicate in the box at the right the number of the statement below that best
    describes the  most comprehensive level of auditing work performed for the
    bank by independent external Number auditors as of any date                                                Number
    during 1996 . . . . . . . . . . . . ....RCFD 6724 . . . . . . . . . . . . . . . [N/A]                      M.I.



1 = Independent audit of the bank conducted in accordance with generally
    accepted auditing standards by a certified public accounting firm which
    submits a report on the bank

2 = Independent audit of the bank's parent holding company conducted in
    accordance with generally accepted auditing standards by a certified public
    accounting firm which submits a report on the consolidated holding company
    (but not on the bank separately)

3 = Directors' examination of the bank conducted in accordance with generally
    accepted auditing standards by a certified public accounting firm (may be
    required by state chartering authority)

4 = Directors' examination of the bank performed by other external auditors
    (may be required by state chartering authority)

5 = Review of the bank's financial statements by external auditors

6 = Compilation of the bank's financial statements by external auditors

7 = Other audit procedures (excluding tax preparation work)

8 = No external audit work


(1) Includes total demand deposits and noninterest-bearing time and savings
deposits.