LONDON, 29 February 2008 – Aon Limited has announced a number of key appointments to its Commercial insurance operation, a part of the Aon Corporate division. The changes follow the recent appointment of Robert Brown as CEO of Aon Corporate.

Norman Andrews has been appointed regional director for the North Region, which includes offices in Leeds, Newcastle, Glasgow, Edinburgh and Aberdeen. Based in Glasgow, Norman has been with Aon for 21 years.

David Roberts has been appointed regional director for the South region, which includes operations in Southampton, Reading, Redhill, London, Chelmsford, Broxbourne and Bristol. David was previously head of client management for the London Large Corporate team and has held senior management roles at Aon for more than 15 years.

The CEO of Aon Corporate, Robert Brown, will look after the Central region (Manchester, Sheffield, Leicester and Birmingham) until an appointment is made.

In addition, Phil Hamilton has been appointed UK operations director. Phil was previously a regional client service director for the North and Scotland regions.

Robert Brown, CEO of Aon Corporate, comments: Our Commercial Insurance division is the flagship of our UK retail operations. These changes are about making it easier to put in outstanding efforts on behalf of our clients and unlocking the enormous potential that this business has in the mid-large corporate sector.

“We have a clearly stated vision in Commercial Insurance – to be the best local, regional and national broker in the UK. Since taking on this role last month, I have met more than half of the 800-strong team and I know there is an enormous amount of passion, commitment and ability to achieve that vision.

Ends

For more information contact:

Reuben Aitchison

0207 882 0541

reuben.aitchison@aon.co.uk

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 43,000 professionals 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 ranked by A.M. Best as the number one global insurance brokerage in 2007 based on brokerage revenues, and voted best insurance intermediary, best reinsurance intermediary, and best employee benefits consulting firm in 2007 by the readers of Business Insurance. For more information on Aon, log onto www.aon.com.

This press release contains certain statements related to future results, or states our intentions, beliefs and expectations or predictions for the future which are forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from either historical or anticipated results depending on a variety of factors. Potential factors that could impact results include: general economic conditions in different countries in which we do business around the world, changes in global equity and fixed income markets that could affect the return on invested assets, fluctuations in exchange and interest rates that could influence revenue and expense, rating agency actions that could affect our ability to borrow funds, funding of our various pension plans, changes in the competitive environment, our ability to implement restructuring initiatives and other initiatives intended to yield cost savings, our ability to successfully close the sales of our Combined Insurance and Sterling Life Insurance businesses, the impact of current, pending and future regulatory and legislative actions that affect our ability to market and sell, and be reimbursed at current levels for, our Sterling subsidiary's Medicare Advantage health plans, changes in commercial property and casualty markets and commercial premium rates that could impact revenues, changes in revenues and earnings due to the elimination of contingent commissions, other uncertainties surrounding a new compensation model, the impact of investigations brought by U.S. state attorneys general, U.S. state insurance regulators, U.S. federal prosecutors, U.S. federal regulators, and regulatory authorities in the U.K. and other countries, the impact of class actions and individual lawsuits including client class actions, securities class actions, derivative actions, ERISA class actions, the impact of the analysis of practices relating to stock options, the cost of resolution of other contingent liabilities and loss contingencies, and the difference in ultimate paid claims in our underwriting companies from actuarial estimates.  Further information concerning the Company and its business, including factors that potentially could materially affect the Company's financial results, is contained in the Company's filings with the Securities and Exchange Commission.

Aon Limited is authorised and regulated by the Financial Services Authority in respect of insurance mediation activities only.