Strachan served as a non-executive director of the company for over seven years since his appointment in January 2002.

Thomas Harris, is currently a vice chairman of Standard Chartered Capital Markets Ltd, a non-executive director of Biocompatibles International plc and of SC First Bank (Korea), a director of IFSL and a Trustee of Asia House. He was director general of Trade & Investment USA responsible for British business and technology promotion throughout the US. He served as British Ambassador to the Republic of Korea in Seoul, Deputy High Commissioner in Lagos, Nigeria and Commercial Counsellor in the British Embassy in Washington DC.

It is intended that MacLeod will take over the role of group finance director from J N Sheldrick when he retires on September 7, 2009.

MacLeod, has been group finance director of WS Atkins plc since June 2004, having joined as group financial controller in March 2003. He previously worked in a variety of senior financial roles at Enterprise Oil plc. He is currently a non-executive director of Aggreko plc.