Exhibit 10.28

11 August 2005
                                                 Telephone +44(0)1473 223000
                                                 Website   www.willis.com

                                                 Direct Line   +44(0)1473 223291
                                                 Direct Fax    +44(0)1473 223563
                                                 E-mail setterfieldnj@willis.com
PRIVATE & CONFIDENTIAL
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Mr P Regan
Grove Cottage
Nayland Road
Great Horksley
Colchester
C06 4AG

Our Ref:  /ns


Dear Mr Regan

Further to your recent interview, I am very pleased to offer you the position of
Chief Financial Officer reporting to Tom Colraine Co-Chief Operating Officer
within the Global Group Management Division of Willis Limited.

Upon joining you will be appointed as a member of the Partners Group which is
our internal Executive Committee reporting to the Willis Board of Directors.

In addition to the main terms and conditions contained in the enclosed Contract
of Employment, the following will apply:

     1)   Your annual salary will be (pound)265,000 paid monthly in arrears and
          your job grade will be 14.

     2)   You will be entitled to receive a sign-on bonus of (pound)150,000 upon
          joining the Company; this will be subject to the usual tax and
          National Insurance deductions and will be paid with your first month's
          salary. Should you or the Company provide notice of termination during
          the first 12 months of your employment you will be required to
          reimburse this bonus payment.

     3)   Upon joining Willis Limited you will, consistent with your expressed
          desire, be invited to take up the opportunity to invest $100,000 for
          the purchase of shares of the common stock of Willis Group Holdings
          Limited ('Shares'). In connection with your purchase of Shares you
          will be granted an option to purchase an additional two Shares (the
          'Option') for each Share purchased at a per Share purchase price equal
          to the closing market price of the Shares on the New York Stock
          Exchange on the first date of your employment ('Purchase Price'). This
          opportunity is being made to you in accordance with the Matched Option
          Program of the Willis Group Holdings Limited 2001 Share Purchase and
          Option Plan.

          We have made arrangements for the Trustee of the UK Trust established
          by Willis Group Holdings Limited ('Willis'), Mourant & Co., Trustees
          Limited ('UK Trustee'), to sell to you the number of whole Shares you
          chose to purchase, at the Purchase Price. The purchase of Shares will
          be treated as being effected as of your first day of employment with
          Willis Limited ('Purchase Date'). Please note that one of the
          conditions of the Matched Option Program is that you will agree not to
          sell or otherwise dispose of your Shares for a period ending six years
          from the Purchase Date or, if earlier, your termination of employment
          (without the prior consent of Willis). If you do sell the Shares you
          purchased from the UK Trustee without consent your Option will lapse.
          Further, so long as you continue to be employed by Willis Limited or
          subsidiary of Willis, the Option will vest twenty percent per year
          over five years, beginning on the second anniversary of the date the
          Option is granted, and will become exercisable on the date the Option
          is fully vested i.e. the sixth anniversary of the date the Option is
          granted.



          Further, it is a condition of the option grant under the Matched
          Option Program that you enter into a joint election with your UK
          employing company, Willis Limited, to accept the employer's liability
          for National Insurance arising on the exercise of the option and to
          execute a definitive Option Agreement and Sale and Purchase Agreement.

          You will receive further details of the Matched Option Program and
          documents to complete your purchase of the Shares and the grant of the
          Option shortly after you have joined us. You must complete the Matched
          Option Program documentation within 30 days after you receive the
          documentation or the offer of shares will lapse automatically.

     4)   You will be eligible to be included in the Annual Incentive Plan. The
          Plan is linked to the Company's and your own performance and has an on
          target award equal to 100% of your annual base salary. I would like to
          point out that this payment is totally discretionary.

     5)   Upon joining Willis Limited you will receive a grant of 50,000 options
          in accordance with the Willis Partners Portfolio Plan of the Willis
          Group Holdings Limited 2001 Share Purchase and Option Plan. The grant
          of options will be made to you at a Share price equal to the closing
          market price of the Shares on the New York Stock Exchange on the first
          day of your employment.

     6)   You are eligible to join the Willis Pension Scheme and you are
          entitled to the senior scale of benefits. This means that you have the
          right to retire at any age between 60 and 65 without an actuarial
          reduction being applied to the benefits. Full details of the pension
          and life assurance benefits provided by the Scheme are available in
          the enclosed Booklet. You will automatically join the Scheme and
          member contributions will be deducted from your salary unless you
          elect to opt out. If you have any queries about the Scheme please
          contact Group Pensions on 01473 223836 or e-mail pensions@willis.com.

          Please complete the enclosed forms, which will provide information to
          enable us to administer your pension, and return them to Human
          Resources on the first day of your employment. If you do not wish to
          join the Scheme please instead complete and return the enclosed Opt
          Out Form.

          Your salary exceeds the Earnings Cap (currently (pound)105,600) set by
          the Inland Revenue which may restrict the benefits that can be
          provided under the Willis Pension Scheme. In particular your lump sum
          death in service benefit is subject to a maximum of four times the
          Earnings Cap.

          Membership of the Scheme is subject to the Scheme Trust Deed and
          Rules. Benefits may be restricted by the limits set by the Inland
          Revenue. The employment of Scheme members is covered by a
          Contracting-out certificate.

     7)   You will be eligible to receive either a level 14 car provided by the
          Company or a car allowance of the same level which currently amounts
          to (pound)7,332 per annum (please see the attached Company Car Policy
          & Procedures). Marshall Leasing will be pleased to discuss your
          entitlement with you, please contact Suzanne Reeve on 01480 414541
          with any queries in this respect.



     8)   You will be eligible to join the Willis Group Medical Plan which
          provides single cover (Silver) for all Associates who opt to join the
          Plan. This will constitute a taxable benefit.

          You will also have the option to buy increased cover to include family
          members and/or increase the benefit level. Further details are
          enclosed.

          Please complete the Registration Form for the level of cover you
          require and return to me. Cover will commence when you receive
          confirmation from the Plan Administrators.

          If you do not join the Plan within one month of commencing employment
          your next opportunity to join will be at renewal.

     9)   After two years service at grade 14 or above, you will be required to
          have the first of your biennial medical examinations at the Company's
          expense. Our Occupational Health Department will contact you when this
          becomes due.

     10)  When you join Willis you may have an immediate salary advance to
          purchase a quarterly season ticket for travel between the office and
          your home. The amount advanced to you will be deducted in three equal
          payments from your salary. Please complete the enclosed application
          form and hand to your HR contact on your first day to enable us to
          issue you with a travel warrant which you use to purchase your season
          ticket at the relevant ticket office. After 3 month's service you may
          apply for an annual season ticket advance.

          If you wish arrangements to be made to take over an existing season
          ticket balance from your current employer, please provide telephone
          and postal details of the relevant contact, together with details of
          the total outstanding balance. You will also need to complete the
          enclosed application form to authorize deductions from your salary.

     11)  When you join Willis, you will be eligible to join the Childcare
          Voucher Scheme within your first month of employment with Willis. Your
          voucher start date will commence from the 1st of the month following
          the date of joining the scheme.

          Further details of the scheme can be found in the enclosed Childcare
          Voucher Scheme information sheet. If you wish to join the scheme,
          please complete the enclosed Registration Form and return to me.

          Please note if you do not join the scheme within one month of
          commencing employment your next opportunity to join will be at
          renewal.

     12)  In order to provide a healthy working environment, smoking is
          prohibited in all UK offices.

     This offer and your employment are subject to:

          a.   Your acceptance of the conditions contained in this letter, the
               enclosed Contract of Employment and the Associate Handbook
               Summary.

          b.   You providing the Company with evidence of your entitlement to
               work in the UK. The evidence required is your passport and any
               supporting documentation you may have. The Company is required
               under the Immigration Act to see and photocopy this documentation
               before you commence work.

          c.   Receipt of references satisfactory to the Company. We will
               approach the referees indicated on your application form on
               receipt of your acceptance of this offer unless you advise us to
               the contrary. If you have not yet given us this information,
               please let us have the names of two chosen referees immediately,
               one of whom must be your present or last employer.




          d.   Receipt of medical details which are satisfactory to the Company.
               Please complete the enclosed Medical Questionnaire and return it
               to the Occupational Health Department, London in the stamped
               addressed envelope provided.

          e.   You providing the Company with evidence of all relevant
               professional qualifications and the highest academic
               qualification that you have quoted on your application form, in
               your CV or verbally during the selection process. It is group
               policy and a requirement of our regulatory body that we obtain
               evidence of your competence to be employed in the capacity
               offered, for this reason, we reserve the right to invoke the
               Disciplinary Procedure if you do not fulfill this requirement.

          f.   All representations, whether oral or in writing, made by you when
               applying for this position about your qualifications, experience
               and other material matters being true and correct.

          g.   You not having deliberately failed to disclose any matter that
               may have influenced the Company's decision to employ you.

          h.   You passing the Lloyds Introductory Test, if you have not already
               done so, within 15 months of the start of your employment with
               Willis. We reserve the right to invoke the Performance
               Improvement process if you do not fulfill this requirement.

          i.   You passing the Insurance Essentials Training within six months
               of the start of your employment with Willis. You will be provided
               with appropriate support to achieve this, and the Company
               reserves the right to invoke the Performance Improvement
               Procedure if you do not fulfill this requirement.

               Insurance Essentials is an e-learning training programme which
               develops and tests your basic knowledge of the Insurance Industry
               and environment in which we operate. It is comprised of a number
               of modules and lasts approximately four hours, and forms a major
               part of our regulatory requirements to constantly maintain the
               competence of our Associates.

          j.   You will also be required to attend a full pre-employment
               medical. Therefore, I should be grateful if you would contact
               Rood Lane Medical Centre on 0207 377 4646 to arrange a convenient
               appointment. Would you please ensure that your pre-employment
               Medical Questionnaire is returned to our Occupational Health
               Department at least two days before contacting Rood Lane.

I hope that you will accept this offer of employment and would be grateful if
you could sign and return both copies of the Contract of Employment to me as
soon as possible, including a note of your National Insurance Number. At the
same time would you please also complete and return the enclosed application
form. I would also be grateful if you could confirm the exact date on which you
are able to commence work with us.

Please note, this offer remains valid for 10 working days from the date of issue
of this letter. If you are unable to respond within this period, please contact
me to discuss any appropriate extension. One copy of the Contract will be
returned to you for your own records.

If you have any queries regarding the offer, please do not hesitate to contact
me on the above direct line.

I hope you enjoy working with us.

Yours sincerely


/s/ N Setterfield
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Nicola Setterfield
HR Assistant
Human Resources
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