Aon Kicks off Four-Year Manchester United Shirt Sponsorship With Global Charity Initiatives

Partners Share Commitment to Positive Youth Development and Healthier Communities

MANCHESTER, England, June 1, 2010 - Aon Corporation (NYSE: AON), the world's leading risk advisor and human
capital consultant, today kicked off its four-year shirt sponsorship of
Manchester United with a programme of global charity initiatives designed to
promote youth development and healthier communities. The sponsorship was
announced on June 3, 2009.

(Logo: www.newscom.com/cgi-bin/prnh/20041215/CGW049LOGO)

The sponsorship and charity campaign were launched at Manchester United's
Old Trafford stadium this morning by executives of Aon and Manchester United,
along with Manchester United team legends Sir Bobby Charlton and Bryan
Robson.

"Based on our shared values of leadership, teamwork, and a passion for
excellence, it is difficult to imagine a stronger fit for Aon than Manchester
United," said Greg Case, President and Chief Executive Officer of Aon
Corporation. "Through the global charitable initiatives of Aon's 36,000
colleagues, we will work with our partners at Manchester United and the
Manchester United Foundation to promote these values and create positive
opportunities for young people, to enable them to thrive and to help improve
their communities."

David Gill, Chief Executive Officer of Manchester United, said, "This
event is an indication of how Aon is committed to developing the partnership
way beyond a simple commercial arrangement. In the coming years, I hope we
will be able to build a tangible legacy for the Manchester United community
both here in the north west and further afield. I am delighted that Aon wants
to get its whole worldwide workforce involved. I'm sure it will really bring
the sponsorship to life for many of them."

To mark the start of the sponsorship, the first charity event involved
more than 150 of Aon's Manchester-based colleagues and their families, who
participated in a Penalty Kick Challenge at Old Trafford for the
Manchester-based The Christie charity - one of England's leading cancer
centres which treats more than 40,000 patients a year.

The Aon Foundation donated 25,000 pounds, of which 3,500 pounds came from
the Penalty Kick Challenge, to The Survivorship Programme of The Christie,
which helps young people progress in their educational and career goals and
receive life skills support following cancer treatment.

Caroline Shaw, Chief Executive of The Christie, said, "Having cancer at
any age is traumatic, but it is especially difficult for young people when
they still have their whole lives ahead of them. This generous support will
help them have the successful and fulfilling life that they deserve after
cancer."

Case added, "Throughout our more than 500 offices around the world, Aon
colleagues are joining today's fundraising through an "Aon United REDy Day"
campaign, including raising money for local charities by wearing Manchester
United shirts or red clothes for the day. Aon is an organization that is
truly committed to strengthening communities by sharing our human,
intellectual and financial resources. We believe that through this ongoing
programme of charitable initiatives we can make a positive difference in
people's lives."

Forthcoming Aon charity initiatives include "Aon United Day" on July 15,
2010, which will involve Aon's global colleagues in over 120 countries
participating in fundraising and volunteer activities, including supporting
hundreds of schools, children's hospitals, orphanages and community centres
as well as more well-known organizations such as Big Brothers Big Sisters
Clubs, Junior Achievement, Ronald McDonald House, Special Olympics, UNICEF,
United Way and the YMCA.

For example, in Botswana, Aon colleagues will partner with the House of
Hope orphanage by providing furniture donations and helping to clean and
improve the facility. In Singapore, Aon volunteers will host an indoor
football match for the young people served by Boys' Town and will support the
organization's new building fund. Aon Bangalore has "adopted" a local
elementary school that it will support throughout the coming year with both
charitable donations and volunteer service. In Bolivia, Aon colleagues will
donate to Hogar de Ninos Alalay, helping to plant trees on the orphanage
grounds and creating art projects with the children who live there. In
Sacramento, California, Aon colleagues are partnering with Project 680 by
collecting hygiene supplies to distribute to homeless youth. In the
Netherlands, Aon colleagues will participate in a charity bike ride and sell
Right to Play merchandise to help raise funds for youth sports programmes in
disadvantaged areas.

For more information on the Aon Manchester United sponsorship, visit
www.aon.com/unitedin2010.

About Aon

Aon Corporation (NYSE: AON) is the leading global provider of risk
management services, insurance and reinsurance brokerage, and human capital
consulting. Through its more than 36,000 colleagues worldwide, Aon delivers
distinctive client value via innovative and effective risk management and
workforce productivity solutions. Aon's industry-leading global resources and
technical expertise are delivered locally through more than 500 offices in
more than 120 countries. Named the world's best broker by Euromoney
magazine's 2008 and 2009 Insurance Survey, Aon also ranked highest on
Business Insurance's listing of the world's largest insurance brokers based
on commercial retail, wholesale, reinsurance and personal lines brokerage
revenues in 2008 and 2009. A.M. Best deemed Aon the number one insurance
broker based on brokerage revenues in 2007, 2008 and 2009, and Aon was voted
best insurance intermediary, best reinsurance intermediary and best employee
benefits consulting firm in 2007, 2008 and 2009 by the readers of Business
Insurance. For more information on Aon, log onto www.aon.com.

About Manchester United

Manchester United is the biggest football club in the world. It has an
estimated 333 million fans across the globe. Its home at Old Trafford
celebrates its centenary in 2010 and reflects the rich history that surrounds
the Club. The first English Club to compete in the European Club, its
visionary manager Sir Matt Busby later led the team to the first English
triumph in that competition in 1968. In modern times, Sir Alex Ferguson -
also knighted by HM The Queen for his outstanding contribution to football -
has led the Club to more European, domestic and world success.

About The Christie

The Christie is one of Europe's leading cancer centres - treating over
40,000 patients a year - and an international leader in cancer research. It
is based in Manchester, but as a national specialist it treats 26% of its
patients from other parts of the country. For more information about The
Christie charity, visit: www.christies.org.

Photos of today's Penalty Kick Challenge at Old Trafford for the
Manchester-based The Christie charity will be available from 2.30pm BST on
June 1 via www.gettyimages.com.

    For further information, please contact:

    Phil Townsend
    Manchester United
    T: +44-(0)161-868-8148
    pressoffice@manutd.co.uk

    David Prosperi
    Aon Corporation
    T: +1-312-381-2485
    david_prosperi@aon.com

    David Bogg
    Aon Corporation
    T: +44-(0)20-7522-4016
    David.bogg@aonbenfield.com

Phil Townsend of Manchester United, +44-(0)161-868-8148, pressoffice at manutd.co.uk; or David Prosperi, +1-312-381-2485, david_prosperi at aon.com, or David Bogg, +44-(0)20-7522-4016, David.bogg at aonbenfield.com, both of Aon Corporation