Exhibit 99.1

                    Willis Group Announces Leadership Changes
  to Drive Continuing Growth; Grahame Millwater Named Chief Operating Officer



    NEW YORK--(BUSINESS WIRE)--Nov. 29, 2006--Building on the strong
financial and operational momentum established over the last several
years, Willis Group Holdings Limited (NYSE:WSH), the global insurance
broker, announced today significant leadership changes designed to
drive the Company's continuing growth and its Shaping Our Future
initiatives.

    Grahame Millwater, who has been with Willis for 21 years and has
served the Company in several capacities, has been appointed the Chief
Operating Officer of the Group. Over the past few months, Millwater
has had a leadership role focusing on our Shaping Our Future
initiatives intended to enhance Willis' industry-leading revenue
growth as well as increase the Company's operational efficiencies. In
this new role, Millwater will be working closely with Joe Plumeri,
Chairman and Chief Executive Officer on all aspects of the day-to-day
management of the Company. Millwater remains Chairman of Willis Re, as
Peter Hearn was appointed the global CEO of the unit earlier this
year.

    Concurrently, the Company announced that after 18 years of
distinguished service with Willis, Tom Colraine has decided to leave
the Group at the end of this year. In a number of finance positions
and most recently as Vice Chairman and Co-Chief Operating Officer,
Colraine has been an essential part of the Company's success. As Chief
Financial Officer through Kohlberg Kravis Roberts' leveraged buyout
and on into Willis' return to the public market, Colraine has led the
finance team through extraordinary changes.

    "Tom Colraine's contribution to this Company is nothing short of
extraordinary," said Plumeri. "You hear, from time to time, about
people who exhibit tireless dedication, unwavering loyalty and a
passion that knows no bounds. I was fortunate to find one such person
in Tom when I arrived at Willis and it has been an honor to work with
him, side by side, for the last six years. His experience and
perspective have been invaluable to the entire Company and to me
personally as we have gone through a great many situations and have
instituted significant changes. Everyone at Willis owes him a debt of
gratitude for his far-reaching impact; we thank him collectively and
personally - and wish him every success and happiness in all his
future endeavors."

    Richard Bucknall, in addition to his current role as Chairman of
Willis Limited, will replace Colraine as CEO. As the insurance
industry comes under increasing regulation, this role is critical in
maintaining a strong relationship with the UK Financial Services
Authority. Bucknall will remain Vice Chairman of the Group, focusing
on the Company's marketing efforts around the world. This includes
driving the Willis Quality Index which is one of the prime initiatives
the Company is undertaking to work more closely with its carrier
partners to deliver superior service to its clients. Bucknall will
also continue to focus on enhancing the relationship Willis has with
large, global accounts whose insurance and risk management needs are
increasing complex.

    Pat Regan, who joined Willis as the Chief Financial Officer in
November, 2005, will be taking on expanded responsibilities with
Colraine's departure. He will oversee the Real Estate unit at a
pivotal moment in the construction of the Company's new London
headquarters. He will also take up oversight of Mergers and
Acquisitions as Willis manages this component of its growth strategy
in a post-contingent world. Regan will also manage Risk Management and
Investor Relations and will report directly to Plumeri.

    "The changes we are announcing today are part of the natural
evolution of the Company," Plumeri continued. "We have put ourselves
on strong financial footing and have made great progress in building
our sales culture and unifying our terrific people around the world
into a cohesive, unified team. Today, we are building on our strong
foundation, focused on our future and committed to executing the plans
we have in place to continue our growth."

    "In Grahame Millwater, we have a multi-faceted Chief Operating
Officer who is rich in industry experience and understands what it
means to run the company in the best interests of the shareholder
while delivering first rate client service," said Plumeri. "Through
various positions, he has continuously proven himself and has shown an
unwavering dedication to our model and our mission. Grahame has my
every confidence but more importantly, he has the respect of his
colleagues."

    Willis Group Holdings Limited is a leading global insurance
broker, developing and delivering professional insurance, reinsurance,
risk management, financial and human resource consulting and actuarial
services to corporations, public entities and institutions around the
world. With over 300 offices in more than 100 countries, its global
team of 15,400 Employees and Associates serves clients in some 190
countries. Willis is publicly traded on the New York Stock Exchange
(NYSE: WSH). Additional information on Willis may be found on its web
site: www.willis.com.


    CONTACT: Willis Group Holdings Limited
             Investors:
             Kerry K. Calaiaro, +1 212 837-0880
             kerry.calaiaro@willis.com
             or
             Media:
             Dan Prince, +1 212 837-0806
             daniel.prince@willis.com