| WOOD, Tracey Alison ACTIVE | Secretary | 01 Jun 2011 | | | | Costain House, Vanwall Business Park, Maidenhead, Berkshire, SL6 4UB, Uk |
| ARMISHAW, Roy ACTIVE | Director | 26 Mar 2009 | | United Kingdom | July 1956 | Costain House, Vanwall Business Park, Maidenhead, Berkshire, SL6 4UB |
| BENTLEY, Eleanor ACTIVE | Director | 26 Mar 2009 | | Scotland | January 1969 | Costain House, Vanwall Business Park, Maidenhead, Berkshire, SL6 4UB |
| HARRIS, Matthew James ACTIVE | Director | 01 Apr 2014 | | England | November 1970 | Costain House, Vanwall Business Park, Maidenhead, Berkshire, SL6 4UB, Uk |
| FRANKS, Clive Leonard RESIGNED | Secretary | 06 Jun 2003 | 31 May 2011 | | | Costain House, Vanwall Business Park, Maidenhead, Berkshire, SL6 4UB, United Kingdom |
| SWIFT INCORPORATIONS LIMITED RESIGNED | Nominee Secretary | 06 Jun 2003 | 06 Jun 2003 | | | 26, Church Street, London, NW8 8EP |
| ATACK, James Caven RESIGNED | Director | 08 Oct 2003 | 20 Dec 2005 | | December 1950 | West Stoneyfield Cottage, Nether Coullie Kemnay, Inverurie, Aberdeenshire, AB51 5LU |
| BENNINGTON, Simon RESIGNED | Director | 08 Oct 2003 | 16 Dec 2003 | | July 1967 | 3 Kings Gate, Off School Lane Sandiway, Northwich, Cheshire, CW8 2NH |
| CRIBB, Graham Lawrence RESIGNED | Director | 22 Feb 2007 | 10 Apr 2013 | England | October 1961 | Costain House, Vanwall Business Park, Maidenhead, Berkshire, SL6 4UB |
| FERGUSON, Kenneth RESIGNED | Director | 10 Nov 2008 | 26 Mar 2009 | | April 1958 | 7, Burnbanks Village, Cove Bay, Aberdeen, AB12 3WN |
| FRANKS, Clive Leonard RESIGNED | Director | 06 Jun 2003 | 08 Oct 2003 | United Kingdom | January 1945 | The Old Bakehouse Fawley Bottom, Henley On Thames, Oxfordshire, RG9 6JJ |
| HENDERSON, Michael John RESIGNED | Director | 08 Oct 2003 | 11 Sep 2015 | United Kingdom | November 1957 | Costain House, Vanwall Business Park, Maidenhead, Berkshire, SL6 4UB |
| HUGHES, Gregory Peter RESIGNED | Director | 08 Oct 2003 | 22 Feb 2007 | | July 1960 | 43 Hill Drive, Whaley Bridge, High Peak, Derby, SK23 7BH |
| MALLAN, Patrick RESIGNED | Director | 08 Oct 2003 | 26 Mar 2009 | Scotland | May 1955 | 9 Bridges View, Dunfermline, Fife, KY12 0GA |
| MCCOLE, Charles Joseph RESIGNED | Director | 06 Jun 2003 | 08 Oct 2003 | England | September 1952 | Chimneys, 9 Woodcote Place, Ascot, Berkshire, SL5 7JT |
| MILLAR, Francis Joseph RESIGNED | Director | 02 Jun 2009 | 31 Mar 2014 | England | March 1964 | Costain House, Vanwall Business Park, Maidenhead, Berkshire, SL6 4UB |
| SWEENEY, Charles Alan RESIGNED | Director | 16 Dec 2003 | 02 Jun 2009 | England | May 1959 | Gorse House, Gorse Ride North Finchampstead, Wokingham, Berkshire, RG40 4ES |
| WEBBER, Stephen Thomas RESIGNED | Director | 20 Dec 2005 | 10 Nov 2008 | | August 1964 | 17 Mount Way, Waverton, Chester, Cheshire, CH3 7QF |
| WINSTANLEY, Christopher RESIGNED | Director | 16 Dec 2003 | 28 Feb 2013 | Britain | January 1956 | Costain House, Vanwall Business Park, Maidenhead, Berkshire, SL6 4UB |