LONDON, 20 April 2007 – Aon is celebrating its 20th anniversary through community projects – such as refurbishing an African Caribbean charity shop in London – and by treating every employee to their birthday off work.

Over 5,000 employees across the UK will all receive an extra day’s holiday over the next twelve months to commemorate the two decades since Aon was quoted on the New York Stock Exchange on 24 April 1987.

Stuart Fox, managing director of HR at Aon, commented: “Employees at Aon, like most in the industry, are experiencing a period of significant change. We wanted to recognise the contribution our individuals are making to the business by giving them the extra holiday. Aon operates a flexible benefits system and the most popular ‘bought’ benefit is additional holidays, with 20% of eligible staff opting for extra holiday this year. Therefore, the Aon 20 birthday holiday provides staff with a valued extra benefit. Having recommended this benefit to our HR clients, we’re glad to practice what we preach!”

Meanwhile, over 150 Aon offices around the world are participating in local community projects on or around that date with the theme ‘People Helping People’.  From replacing electrical fittings at a Hackney charity shop to painting the music room at the Children’s Hospice Association of Scotland, employees have been encouraged to take part in these projects to thank local communities that have supported Aon over the last 20 years.

“The last twenty years have seen Aon achieve leading positions in insurance broking, risk management and HR consulting. As we continue to grow, we are keen to remain a fun place to work and build on our staff culture, around taking pride and bringing innovation.”

Notes to editors:

Pictured: Sarah Harrison, pensions administrator for Aon Consulting, is also celebrating her 20th birthday on 24 April, alongside Aon. Sarah joined six months ago and is already revising for her Qualification in Pensions Administration. Sarah’s Farnborough office will be celebrating her and Aon’s birthday by planting a tree and holding a balloon race in 80s fancy dress.

About Aon Consulting

Aon Consulting is a leading human capital consultancy, helping organisations of every size to attract and keep the employees they need. We advise on all aspects of employment, including health-related insurance and risk; employee compensation and pensions; human resource strategy planning; job design and change management; and staff assessment and legal issues. Aon Consulting is a division of Aon, one of the UK’s largest insurance brokers and providers of risk management services and a major force in reinsurance and the UK human capital consulting market.  Aon Consulting Limited is authorised and regulated by the Financial Services Authority.

About Aon

Aon Corporation is a leading provider of risk management services, insurance and reinsurance brokerage, human capital and management consulting, and specialty insurance underwriting.  There are 43,000 employees working in Aon’s 500 offices in more than 120 countries.  Backed by broad resources, industry knowledge and technical expertise, Aon professionals help a wide range of clients develop effective risk management and workforce productivity solutions.

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 execute the stock repurchase program, our ability to obtain regulatory or legislative changes to permit continuous sales of our supplemental Medicare health product, 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 state attorneys general, state insurance regulators, federal prosecutors, and federal regulators, 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

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