THIS NOTICE IS NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN WHOLE OR IN PART IN, INTO OR FROM CANADA, AUSTRALIA OR JAPAN OR ANY OTHER JURISDICTION WHERE IT IS UNLAWFUL TO DO SO For immediate release 31 March 2008 Recommended cash offer for ArmorGroup International plc by G4S (March 2008) Limited (a wholly-owned subsidiary of G4S plc) Posting of Offer Document Further to the announcement made on 20 March 2008 regarding the recommended cash offer to be made by G4S (March 2008) Limited (“Bidco”), a wholly owned subsidiary of G4S plc (“G4S”), to acquire the entire issued and to be issued share capital of ArmorGroup International plc (“ArmorGroup”) (“the Offer”), Bidco announces that the Offer document containing full terms of, and conditions to, the Offer, (the “Offer Document”) has today been posted to ArmorGroup Shareholders, together with the related Form of Acceptance. To accept the Offer in respect of ArmorGroup Shares held in certificated form, ArmorGroup Shareholders should complete, sign and return the Form of Acceptance, which accompanies the Offer Document, in accordance with the instructions contained therein and set out in the Offer Document, as soon as possible and, in any event, so as to be received by Capita Registrars by no later than 1.00pm (London time) on 21 April 2008. To accept the Offer for ArmorGroup Shares held in uncertificated form (that is, in CREST), ArmorGroup Shareholders should follow the procedure for electronic acceptance through CREST in accordance with the instructions set out in the Offer Document so that the TTE Instruction settles as soon as possible and, in any event, by no later than 1.00pm (London time) on 21 April 2008. Copies of the Offer Document and the Form of Acceptance are available from Capita Registrars, Corporate Actions, The Registry, 34 Beckenham Road, Beckenham, Kent, BR3 4TU during normal business hours on any weekday (Saturdays, Sundays and public holidays excluded) while the Offer remains open for acceptance. Terms defined in the Offer Document have the same meaning in this announcement Greenhill, which is authorised and regulated in the United Kingdom by the Financial Services Authority, is acting exclusively for G4S and Bidco and no-one else in connection with the Offer and will not be responsible to anyone other than G4S or Bidco for providing the protections afforded to clients of Greenhill nor for providing advice in relation to the Offer, the content of this Announcement, or any transaction, arrangement or matter referenced herein. Rothschild, which is authorised and regulated in the United Kingdom by the Financial Services Authority, is acting exclusively for ArmorGroup and no-one else in connection with the Offer and will not be responsible to anyone other than ArmorGroup for providing the protections afforded to clients of Rothschild nor for providing advice in relation to the Offer, the content of this Announcement, or any transaction, arrangement or matter referenced herein. This Announcement is not intended to and does not constitute, or form any part of, an offer to sell or the solicitation of an offer to subscribe for or buy any securities, nor shall there be any sale, issue or transfer of the securities referred to in this announcement in any jurisdiction in contravention of any applicable law. The Offer is made solely by means of the Offer Document and, in the case of certificated ArmorGroup Shares, the Form of Acceptance accompanying the Offer Document. Enquiries: G4S Tel: +44 (0) 1293 554400 Debbie McGrath (Group Communications Director) Helen Parris (Director of Investor Relations)