UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

       Date of Report (Date of earliest event reported): December 1, 2008

                          Willis Group Holdings Limited
             (Exact name of registrant as specified in its charter)



                 Bermuda                                 93-0352587
        (Country of incorporation)          (I.R.S. Employer Identification No.)

                            c/o Willis Group Limited
                                 51 Lime Street
                            London EC3M 7DQ, England

           (Address of principal executive offices including zip code)


    Registrant's telephone number, including area code: (011) 44-20-3124-6000

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

[] Written communications pursuant to Rule 425 under the Securities Act
    (17 CFR 230.425)

[] Soliciting material pursuant to Rule 14a-12 under the Exchange Act
    (17 CFR 240.14a-12)

[] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
   Act (17 CFR 240.14d-2(b))

[] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
   Act (17 CFR 240.13e-4(c))

================================================================================



Item 5.04 Temporary Suspension of Trading Under Registrant's Employee Benefit
Plans.

On December 1, 2008, Willis Group Holdings Limited ("Willis") sent a notice to
its directors and executive officers informing them of a blackout period that is
being imposed in connection with the merger of the HRH Retirement Savings Plan
(the "HRH Plan") into the Willis 401(k) Retirement Savings Plan effective
January 1, 2009 (the "Merger").

Willis' directors and executive officers were informed that a blackout period
with respect to the HRH Plan is expected to begin at 4:00 p.m., Eastern Time, on
December 30, 2008, and expected to end during the week of January 4, 2009. The
blackout period for HRH Plan transactions is being implemented in connection
with the Merger. The HRH blackout period is necessary for the HRH Plan's trustee
to process and implement the Merger. During the HRH blackout period participants
in the HRH Plan will be temporarily unable to (1) direct or diversify
investments in their individual account, (2) take distributions (including final
distributions) of money invested in the HRH Plan, and (3) take loans of money
under the HRH Plan.

Since the HRH blackout period may last for more than three business days,
there must be a  corresponding  blackout  period  applicable  to  directors  and
executive officers of Willis. Pursuant to the requirements of Section 306 of the
Sarbanes-Oxley Act of 2002, during this  corresponding  trading blackout period,
Willis  directors  and  executive  officers  will be generally  prohibited  from
engaging in  transactions  involving  Willis  common  shares and related  equity
securities acquired in connection with their service to Willis.

A copy of the trading blackout notice to Willis' directors and executive
officers, which includes the information specified in Rule 104(b) of Regulation
BTR, is attached hereto as Exhibit 99.1 and is incorporated herein by reference.
During the trading blackout period and for a period of two years after the
ending date of the trading blackout period, security holders or other interested
persons may obtain, without charge, information about the actual beginning and
ending dates of the trading blackout period by contacting Shaun Bryant at +44
(0)20 3124 7146, to whom all inquiries regarding the trading blackout period
should be directed.

Item 9.01 Financial Statements and Exhibits.

(d)  Exhibits

Exhibit No.     Description of Exhibit
- -----------     ----------------------

99.1            Important Notice Concerning Limitations on Your Trading in
                Willis Group Holdings Limited Securities During Special Blackout
                Period, dated December 1, 2008


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                                    SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                       WILLIS GROUP HOLDINGS LIMITED



                                       By: /s/ Adam G. Ciongoli
                                           -------------------------------------
                                           Name: Adam G. Ciongoli
                                           Title: General Counsel


Date: December 1, 2008


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                                  EXHIBIT INDEX

Exhibit No.     Description of Exhibit

99.1            Important Notice Concerning Limitations on Your Trading in
                Willis Group Holdings Limited Securities During Special Blackout
                Period, dated December 1, 2008


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                                                                    Exhibit 99.1
                 Important Notice Concerning Limitations on Your
               Trading in Willis Group Holdings Limited Securities
                         During Special Blackout Period
                         ------------------------------



                                                                December 1, 2008

To:      Directors and Executive Officers of Willis Group Holdings Limited
         ("Willis")

From:  Adam G. Ciongoli


Summary. This notice is to inform you of significant restrictions on your
ability to deal in Willis common shares as well as derivative  securities,  such
as stock options,  during an upcoming  "special"  blackout period.  As described
more fully below,  this  blackout  period for Willis'  directors  and  executive
officers is expected  to commence at 4:00 pm Eastern  time on Tuesday,  December
30, 2008 and to end during the week of January 4, 2009.  This blackout period is
in addition to the customary dealing blackout periods preceding Willis' earnings
releases. It is imposed on all directors and executive officers of Willis by the
Sarbanes-Oxley  Act  of  2002  and  U.S.   Securities  and  Exchange  Commission
Regulation BTR (Blackout  Trading  Restriction).  As more fully described below,
during this blackout  period you will  generally be prohibited  from engaging in
transactions  involving Willis equity securities (including common shares, stock
options and other  derivatives).  We will notify you of any changes  that affect
the dates of the blackout period.

1.   The blackout  period is being imposed in connection  with the merger of the
     HRH  Retirement  Savings  Plan  (the "HRH  Plan")  into the  Willis  401(k)
     Retirement  Savings  Plan  effective  January  1, 2009 (the  "Merger").  In
     connection  with the Merger,  a "blackout  period" for the HRH Plan will be
     imposed and participants will be unable to direct or diversify  investments
     or obtain a loan or distribution from the HRH Plan ("HRH blackout period").
     The HRH blackout  period is necessary for the HRH Plan's trustee to process
     and implement the Merger.  Since the HRH blackout  period may last for more
     than three business days,  there must be a  corresponding  blackout  period
     applicable  to directors  and  executive  officers of Willis.  Accordingly,
     Willis directors and executive  officers will be generally  prohibited from
     engaging in transactions  involving  Willis equity  securities  acquired in
     connection with their service to Willis.

2.   The HRH blackout period is expected to begin at 4:00 p.m., Eastern Time, on
     December  30,  2008,  and end during  the week of January 4, 2009.  We will
     notify you of any changes that affect the dates of the HRH blackout period.
     In  addition,  you can  confirm  the status of the HRH  blackout  period by
     contacting  Shaun  Bryant at +44 (0)20 3124 7146 or by calling  Diversified
     Investment Advisors, toll-free at 1-800-755-5801.

3.   As a result of the Merger, during the HRH blackout period,  participants in
     the  HRH  Plan  will be  temporarily  unable  to (1)  direct  or  diversify
     investments in their individual account, (2) take distributions  (including
     final  distributions) of money invested in the HRH Plan, and (3) take loans
     of money under the HRH Plan.


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4.   Generally,  during the HRH blackout  period,  you will be  prohibited  from
     directly or indirectly,  purchasing,  selling or otherwise transferring any
     equity security of Willis that you acquired in connection with your service
     as a director or an  executive  officer.  "Equity  securities"  are defined
     broadly  to  include   stock   options  and  other   derivatives.   Covered
     transactions are not limited to those involving your direct ownership,  but
     also  include  any  transaction  in which  you have a  direct  or  indirect
     pecuniary interest.  For example,  you may be deemed to have an interest in
     transactions in equity  securities of Willis by your family members if such
     securities  were  originally  acquired in  connection  with your service or
     employment as a Willis executive officer or director.

5.   The prohibition covers securities acquired "in connection with service as a
     director or employment as an executive officer." This includes, among other
     things,  securities  acquired by you under a compensatory  plan or contract
     (such  as  under  a  stock  option  or a  restricted  stock  grant),  as an
     inducement  to your  employment  or  joining  the  Board of  Directors,  in
     transactions  between you and Willis,  and as shares  necessary  for you to
     qualify  as a director  or to satisfy  minimum  ownership  requirements  or
     guidelines.  Securities  acquired  outside of your service as a director or
     executive  officer  (such as shares  acquired when you were an employee but
     not yet an executive officer) are not covered.

6.   If you  engage in a  transaction  that  violates  these  rules,  you can be
     required to disgorge your profits from the transaction, and you are subject
     to civil and criminal penalties.

The rules summarized above are complex, and the criminal and civil penalties
that could be imposed upon directors and executive officers who violate them
could be severe. We therefore request that you contact Shaun Bryant at +44 (0)20
3124 7146 before engaging in any transaction involving Willis securities during
the HRH blackout period, or if you believe that any such transaction in which
you have a pecuniary interest may occur during the HRH blackout period.


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