Offer Document Posted

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, IN OR INTO 
     THE UNITED STATES OF AMERICA, CANADA, AUSTRALIA OR JAPAN OR ANY OTHER     
                  JURISDICTION WHERE IT IS UNLAWFUL TO DO SO                   

                             FOR IMMEDIATE RELEASE                             

                                 26 April 2007                                 

                           Recommended Cash Offer by                           

                                 PKF (UK) LLP                                  

                                 on behalf of                                  

                                Serco Group plc                                

                 to acquire the entire issued and to be issued                 

                           ordinary share capital of                           

                      Cornwell Management Consultants plc                      

                           Posting of Offer Document                           

Serco Group plc ("Serco") announces that the formal offer document containing
the recommended cash offer by PKF (UK) LLP on behalf of Serco to acquire the
entire issued and to be issued ordinary share capital of Cornwell Management
Consultants plc ("Cornwell") ("the Offer"), which was announced on 24 April
2007, was posted to Cornwell shareholders yesterday.

The Offer is not being made, directly or indirectly, in or into, or by use of
the mails, or by any means or instrumentality (including, without limitation,
facsimile transmission, internet, email, telex or telephone) of interstate or
foreign commerce, or of any facility of a national securities exchange, of the
United States of America, Canada, Australia or Japan or any other jurisdiction
where it is unlawful to do so ("the Excluded Territories") and cannot be
accepted by any such use, means, instrumentality or facility or from within any
of the Excluded Territories.

PKF (UK) LLP, which is authorised and regulated in the United Kingdom by the
Financial Services Authority, is acting exclusively for Serco and for no-one
else in connection with the Offer and will not be responsible to anyone other
than Serco for providing the protections afforded to customers of PKF (UK) LLP,
nor for giving advice in relation to the Offer or any matter referred to in the
Offer Document or herein.

This announcement does not constitute an offer to sell or an invitation to
purchase any securities or the solicitation of an offer to buy any securities.