LEEDS, 20 November 2006 – Aon Consulting, a leading pension, benefits and HR consulting firm, has appointed its youngest head of office with the promotion of Gary Cowler to manage its Leeds team. In his new role as client relationship director, Mr Cowler is responsible for ensuring the continued commercial success of the office and managing 110 pensions consultancy, investment and administration employees.

Mr Cowler’s unit has recently merged offices in Sovereign Street with Aon’s insurance broking and risk management consultants to create a 240 strong team. The Leeds office’s work includes actuarial advice to the industry-wide coal pension schemes and integrated pensions management for energy services company Mitsui Babcock.

Mr Cowler (35 years old) brings 14 years of experience advising companies and trustees on the management of their pension schemes. Previously a client manager for Aon, Mr Cowler joined the firm in 2000 from HSBC Actuaries & Consultants where he worked for eight years. He is an associate of the Pensions Management Institute and an economics graduate.

Commenting on his new appointment, Mr Cowler said: "After six years with Aon, it’s a privilege to head up the Leeds office and, with such a great team of people, continue to help our clients manage their pension schemes and associated employee benefits.  This is a crucial time for employers and trustees as they demand more sophisticated means of achieving the most from their employee benefits and need to effectively communicate this commitment to their staff."

John Machon, Aon Consulting’s commercial director and to whom Mr Cowler will report, added: “Gary has a proven track record in recognising and delivering the breadth of service our clients need. Gary has made a growing contribution to our clients and the team so we’re delighted that he’ll be taking on this leadership role.”

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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 46,000 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 consummate the pending sale of the Aon Warranty Group, 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, and ERISA class actions, 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.