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                                                                    EXHIBIT 23.3
                              [LETTERHEAD OF KPMG]

The Board of Directors
LaSalle Re Holdings Limited

     We consent to the incorporation by reference in this Registration Statement
on Form S-4 of Trenwick Group Ltd. of our report dated October 26, 1998, except
as to Note 2(p), which is as of July 13, 2000 relating to the consolidated
balance sheet of LaSalle Re Holdings Limited and subsidiaries as of September
30, 1998, and the related consolidated statements of operations and
comprehensive income, changes in shareholders' equity and cash flows for each of
the years in the two-year period ended September 30, 1998, and all related
schedules, which report appears in the amended annual report on Form 10-K/A for
the year ended September 30, 1999 of LaSalle Re Holdings Limited, and to the
reference to our firm under the heading "Experts" in such registration
statement.

/s/ KPMG
---------------------------------
    KPMG
Chartered Accountants
Hamilton, Bermuda
August 22, 2000