LONDON, 15^th March 2004. Aon Special Risks, the market leading Counter-Terrorism, Political Risks and Kidnap and Ransom insurance broker and risk consultant, today announced that Lord Guthrie of Craigiebank would be joining the company as a non-executive special advisor.

Lord Guthries role at Aon will be to advise the company on the development of new products and new business initiatives in the counter terrorism and political risks markets. He has had an outstanding military career, having been commissioned in the Welsh Guards serving with them and 22 Special Air Service. He commanded 1^st British Corps and the British Army of the Rhine. From 1992-1994 he was Chief of General Staff and from 1994 to 2001 Chief of the Defence Staff.

He was created Lord Guthrie of Craigiebank in June 2001, and is now also a non-executive director of N M Rothschild, the investment bank.

Commenting on the appointment, Paul Bassett, Executive Director of Aon Special Risks, said: "We are delighted to have secured the services of such a pre-eminent figure as Lord Guthrie. He brings a lifetime of direct experience in the management of counter-terrorism and political risk activity to our organisation, and we are looking forward to benefiting from his wisdom and expertise."

Lord Guthrie added, "Aon is one of the world's leading counter-terrorism risk consultants and insurance brokers. There is an urgent need for businesses all over the world to think carefully about their exposure to terrorist threat, and to act to reduce this risk. I am looking forward to working with the team at Aon Special Risks on their business development and product development."

Note to Editors

Aon Corporation (www.aon.com ) is one of the worlds leading providers of risk management, insurance and reinsurance brokerage, human capital and management consulting, and specialty insurance underwriting. The company has more than 600 offices and 54,000 professionals in 125 countries and sovereignties. Aon's global network, broad resources, industry knowledge and technical expertise helps leaders of businesses, associations, and public entities develop effective solutions to risks, issues and challenges, creating opportunities that generate efficiencies, improve profitability and build value.

Aon is an industry leader in a number of key areas including retail, reinsurance, wholesale and specialty insurance brokerage; captive management; human capital consulting; claims and loss cost management; and premium financing.