OneBeacon and The St. Paul Companies are First Carriers to Use IVANS Transformation Station for First Notice of Loss Reporting Greenwich, CT

April 3, 2002 — OneBeacon Insurance Group and The St. Paul Companies are the first carriers to
use IVANS Transformation Station™, a data exchange for real-time transactions, with
their agents for First Notice of Loss reporting.

“The First Notice of Loss transaction in
Transformation Station allows an agent to send a First Notice of Loss to a carrier in
real-time while remaining in their agency management system,” said Anna England.
“The loss information is entered in the management system and sent to Transformation
Station where it is converted to ACORD XML and sent to the carrier. The carrier responds
in real-time, acknowledging the receipt of the notice.”

“The St. Paul processes approximately 230,000 First
Notice of Loss via phone, fax and the Internet,” said Paula Schlotfeldt, Vice
President Claim Shared Services, St. Paul Companies. “The ability to streamline the
reporting process via Transformation Station will make it easier for agents to do business
with us and the system will improve the efficiency of our first notice of loss processing.
It’s a win-win for agents and carriers.”

OneBeacon and St. Paul entered into an agreement earlier
this year with IVANS to sponsor the development of the First Notice of Loss reporting
capability within IVANS Transformation Station.

“Early reporting of claims is a critical component to
managing costs and the impact of real-time claims reporting, data capture and immediate
claim number assignment and claim office notification is significant,” said Dick
Jordan, Managing Director and Chief Claim Officer of OneBeacon. “For agents electing
to retain the loss reporting function, Transformation Station offers an efficient and
effective tool for reporting claims to carriers.”

Transformation Station offers a single, secure connection
point for real-time, immediate and batch mailbox delivery that can be accessed from the
public Internet, private network, or Virtual Private Network (VPN). Since its introduction
last year, Transformation Station has found wide acceptance among insurers, agents and
vendors. IVANS Transformation Station currently supports Auto Loss, Property, Liability,
and Workers Compensation notices.

*** Editors Note: On Wednesday, April 17 at IVANS
E-Business Forum in Tampa, Florida, St. Paul and OneBeacon Insurance Group will be
participating in a Technology Breakout Session where they will discuss why they believe
real-time First Notice of Loss is critical to their business.

About OneBeacon Insurance Group

Headquartered in Boston, Massachusetts, OneBeacon Insurance
Group is committed to being the leading independent agency property/casualty insurance
group in the Northeast and for select specialty businesses. With roots dating back 170
years and an A.M. Best rating of A (excellent), OneBeacon offers a wide range of personal,
commercial and specialty products and services, which are sold exclusively through select
property/casualty independent agents. Specialty operations are conducted on a national basis.

OneBeacon Insurance Group is wholly owned by White
Mountains Insurance Group, Ltd., of Hamilton, Bermuda. White Mountains’ principal
businesses are conducted through its subsidiaries and affiliates in the property/casualty
insurance and reinsurance business. The company is publicly traded on the New York Stock
Exchange under the symbol “WTM.”

About The St. Paul Companies

The St. Paul Companies, headquartered in Saint Paul, Minn.,
USA, provides commercial property-liability insurance and non-life reinsurance worldwide.
The St. Paul reported 2001 revenues from continuing operations of $8.9 billion and total
assets of $38.3 billion. For more information about The St. Paul and its products and
services, visit the company’s Web site, www.stpaul.com.

About IVANS, Inc.

Based in Greenwich, Conn., IVANS, Inc.
(www.ivans.com) is an e-business and
network solutions provider for the property-casualty and healthcare insurance industries.
Established in 1983, IVANS provides e-business solutions and consulting to more than 475
insurance and healthcare companies and related organizations in the United States and Canada.

Maggie O’Hara Director,
Marketing & Communications
Phone: 203-698-7288
Email: [email protected]