EXHIBIT 23(a)


                       CONSENT OF INDEPENDENT ACCOUNTANTS


We hereby consent to the incorporation by reference in the Registration
Statements, as amended, pertaining to the Long Term Incentive Plan (Form S-8,
No. 33-5297), Medium-Term Notes Series A (Form S-3, No. 33-54006), Common Stock
Warrants (Form S-3, No. 33-54749), Folksamerica Holding Company 401(K) Savings
and Investment Plan (Form S-8, No. 333- 82563), the Executive Bonus Plan (Form
S-8, No. 333-89381), the Directors' Retirement Benefit Plan (Form S-8, No.
333-89385) and the Voluntary Deferred Compensation Plan (Form S-8, No.
333-89387) of White Mountains Insurance Group, Ltd. of our report dated February
9, 2001, except for Note 17, which is as of March 16, 2001, relating to the 2000
and 1999 financial statements and financial statement schedules, which appears
in this Form 10-K.


/s/ PricewaterhouseCoopers


Hamilton, Bermuda
March 26, 2001