LONDON, 24 October 2008 - Aon Limited, the UK's largest insurance broker and risk adviser, has appointed Pauline Colvin as chief risk officer.

Pauline has previously been chief risk officer for Skandia, group risk director at Royal & SunAlliance and director of risk, compliance and internal audit at Pearl Assurance. She has also worked as a financial controller and, early in her career, worked as an auditor at Coopers & Lybrand.

David Mead, chief operating officer, commented: "Aon is very fortunate to have someone of Pauline's calibre and experience coming aboard.

"Ensuring we have the right processes in place to truly embed effective risk management as an integral part of our firm's culture is vital. Not only does such an approach ensure we conform to FSA regulations and guidelines, it also enables us to be more effective at implementing our UK growth strategy through the use of Enterprise Risk Management disciplines."

Pauline was awarded a Cranfield MBA in 2001, and is a Member of the Chartered Institute of Personnel & Development and a Fellow of the Chartered Institute of Chartered Accountants.

Ends
For more information contact:
Reuben Aitchison
020 7086 7201
reuben.aitchison@aon.co.uk
http://aon.mediaroom.com

About Aon
Aon Corporation (NYSE: AOC) is the leading global provider of risk management services, insurance and reinsurance brokerage, human capital and management consulting. Through its 36,000 colleagues worldwide, Aon readily delivers distinctive client value via innovative and effective risk management and workforce productivity solutions. Our industry-leading global resources, technical expertise and industry knowledge are delivered locally through more than 500 offices in more than 120 countries. Aon was named the world's best broker by Euromoney magazine's 2008 Insurance Survey. In 2008, Aon ranked highest on the Business Insurance ranking of the world's largest insurance brokers based on commercial retail, wholesale, reinsurance and personal lines brokerage revenues. Aon also was ranked by A.M. Best as the number one insurance broker based on brokerage revenues in 2007 and 2008, and was voted best insurance intermediary, best reinsurance intermediary, and best employee benefits consulting firm in 2007 and 2008 by the readers of Business Insurance. For more information on Aon, log onto http://www.aon.com/.

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