27 June 2007 G4S PLC CHANGE OF DIRECTOR'S DETAILS G4S plc, the international security solutions provider, announces that Bo Lerenius, one of its non-executive directors, has joined the board of Thomas Cook Plc as a non-executive director of that company. Mr Lerenius was formerly the chief executive of Associated British Ports Holdings PLC and remains a non-executive director of that company, now called Associated British Ports Holdings Limited, a position he intends to relinquish at the end of this year. Peter David Company Secretary For further enquiries, please contact: Debbie McGrath +44 (0)1293 554400 Media enquiries: Citigate Dewe Rogerson +44 (0)7973 672649 Notes to Editors G4S operates in over 100 countries throughout the world and employs over 470,000 people. It is a market leader in the provision of security solutions in many of the countries in which it operates. For more information on G4S please visit www.g4s.com.