ST. LOUIS, May 8 /PRNewswire-FirstCall/ -- The ABC Program, a subsidiary of Adrian N. Baker & Co., a national program administrator and leader in risk management solutions for regional airports and fixed-based operators, today announced that its aviation property program -- The ABC Program -- has renewed with OneBeacon Insurance Group following a four-year hiatus. The OneBeacon solution enables The ABC Program to offer property, auto and other miscellaneous coverages under a package product in all states except Hawaii.

The ABC program is ideally suited for, but not limited to, regional airports, fixed-based operators, small airlines, flight schools, aircraft repair operations, and aerial agricultural operations.

"This comprehensive property-auto package enables expanding the ABC Program to additional states with broader coverage well suited to today's aviation customer," said Adrian Baker, CEO of Adrian N. Baker & Co. "We're excited to once again partner with OneBeacon as our underwriter and together deliver a more competitive option for aviation specialists countrywide."

Added Drew Carnase, OneBeacon's senior vice president of commercial lines, "OneBeacon is thrilled to partner with the ABC Program due to their proven ability to reach agents who specialize in the aviation industry. We're confident that our product and our team of specialists will nicely enhance ABC's capabilities within this industry."

OneBeacon is rated A (excellent) by A.M. Best and has comparable ratings from the other leading financial rating agencies. The company's package product conveniently includes property, auto, and inland marine coverages on one policy with features such as:

    * Broad property and auto coverage enhancements
    * A $250,000 Bucket limit, which applies to 12 important property
      coverages
    * Other important property coverages include -- Building Ordinance,
      Business Interruption, Equipment Breakdown, Transit, Runway Lights, A/C
      Museum Fine Arts and many more.
    * Commercial Auto is available and includes coverage for fuel trucks,
      courtesy cars and all other vehicles that make the aviation operation
      run efficiently.

The ABC Program is a comprehensive risk management solution marketed exclusively through agents and brokers, and available in all states except Hawaii.

About the ABC Program

The ABC Program established roots in aviation property insurance prior to World War II, writing flight schools and fixed based operators. The ABC Program has expanded to include many types of airport property, automobile and other related and vital coverages. Today, they have a full staff of trained personnel to assist the aviation broker with his/her property and casualty insurance needs. Since 1982, The ABC Program has provided a program of reliable and cost effective coverages to aviation agencies throughout the United States.

About OneBeacon Insurance

Headquartered in Boston, Massachusetts, OneBeacon Insurance Group offers specialty and segmented personal and commercial insurance products sold primarily through select independent agents. OneBeacon is wholly owned by White Mountains Insurance Group, Ltd. White Mountains' principal businesses are conducted through its subsidiaries and affiliates in the business of property-casualty insurance and reinsurance. The company is publicly traded on the New York Stock Exchange and the Bermuda Stock Exchange under the symbol "WTM."

For more information on The ABC Program, contact Beckie Rodriguez, ABC Program Manager at 314-721-1372 x178.

For more information on OneBeacon, contact Carmen Duarte, Director of Corporate Communications, at 617.725.6598, or visit http://www.onebeacon.com.

Safe Harbor Statement under the Private Securities Litigation Reform Act of 1995

The press release may contain "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. All statements, other than statements of historical facts, included or referenced in this release which address activities, events or developments which we expect or anticipate will or may occur in the future are forward-looking statements. The words "will," "believe," "intend," "expect," "anticipate," "project," "estimate," "predict" and similar expressions are also intended to identify forward-looking statements. These forward-looking statements include, among others, statements with respect to White Mountains':

    * growth in book value per share or return on equity;
    * business strategy;
    * financial and operating targets or plans;
    * incurred losses and the adequacy of its loss and loss adjustment expense
      reserves and related reinsurance;
    * projections of revenues, income (or loss), earnings (or loss) per share,
      dividends, market share or other financial forecasts;
    * expansion and growth of our business and operations; and
    * future capital expenditures.

These statements are based on certain assumptions and analyses made by White Mountains in light of its experience and perception of historical trends, current conditions and expected future developments, as well as other factors believed to be appropriate in the circumstances. However, whether actual results and developments will conform to our expectations and predictions is subject to a number of risks and uncertainties that could cause actual results to differ materially from expectations, including:

    * the risks associated with Item 1A of White Mountains' 2005 Annual Report
      on Form 10-K;
    * claims arising from catastrophic events, such as hurricanes,
      earthquakes, floods or terrorist attacks;
    * the continued availability of capital and financing;
    * general economic, market or business conditions;
    * business opportunities (or lack thereof) that may be presented to it and
      pursued;
    * competitive forces, including the conduct of other property and casualty
      insurers and reinsurers;
    * changes in domestic or foreign laws or regulations, or their
      interpretation, applicable to White Mountains, its competitors or its
      clients;
    * an economic downturn or other economic conditions adversely affecting
      its financial position;
    * recorded loss reserves subsequently proving to have been inadequate;
    * other factors, most of which are beyond White Mountains' control.

Consequently, all of the forward-looking statements made in this press release are qualified by these cautionary statements, and there can be no assurance that the actual results or developments anticipated by White Mountains will be realized or, even if substantially realized, that they will have the expected consequences to, or effects on, White Mountains or its business or operations. White Mountains assumes no obligation to update publicly any such forward-looking statements, whether as a result of new information, future events or otherwise.

OneBeacon Insurance            The ABC Program

Contact: Carmen Duarte Contact: Beckie Rodriguez

Phone: 617.725.6598 Phone: 314.721.1372, x178

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Source: OneBeacon Insurance Group

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