| DUNCOMBE, Fiona Margaret ACTIVE | Secretary | 29 Mar 2006 | | | | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| BIMPSON, Simon Timothy ACTIVE | Director | 01 Dec 2015 | | United Kingdom | September 1974 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| COLLINS, Jeffrey ACTIVE | Director | 25 Jul 2016 | | England | October 1964 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| CONNOLLY, Michael Stephen ACTIVE | Director | 14 Dec 2016 | | England | August 1970 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| MOORE, Patricia ACTIVE | Director | 14 Dec 2016 | | England | February 1968 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| REEVE, Paul Edward ACTIVE | Director | 01 Jun 2019 | | United Kingdom | July 1977 | Arcadis House, 34 York Way, London, England, N1 9AB, England |
| SAVAGE, David Mark ACTIVE | Director | 08 Oct 2014 | | United Kingdom | February 1975 | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| LAWRENCE, Jillian Louise RESIGNED | Secretary | 01 Jan 2020 | 08 Apr 2022 | | | 80, Fenchurch Street, London, EC3M 4BY, United Kingdom |
| BENNION, Matthew John RESIGNED | Director | 24 Apr 2009 | 01 Jun 2012 | England | August 1971 | 34, York Way, London, N1 9AB |
| BROMHEAD, Steven James RESIGNED | Director | 08 Oct 2014 | 01 Dec 2015 | England | December 1972 | 34, York Way, London, N1 9AB |
| BROOKES, Allan Geoffrey RESIGNED | Director | 04 Dec 2013 | 08 Oct 2014 | England | November 1961 | 34, York Way, London, N1 9AB |
| LATHOM-SHARP, Martin Stephen Jeremy RESIGNED | Director | 29 Mar 2006 | 08 Oct 2014 | United Kingdom | February 1967 | Low Hall, Calverley Lane, Horsforth, Leeds, LS18 4GH |
| MCDONALD, Norman RESIGNED | Director | 29 Mar 2006 | 24 Apr 2009 | | December 1947 | 11 Woodlands Drive, Goostrey, Cheshire, CW4 8JH |
| MCGUCKIN, Stephen Augustine RESIGNED | Director | 01 May 2010 | 22 Jul 2013 | United Kingdom | April 1961 | 34, York Way, London, N1 9AB |
| NEAL, Timothy RESIGNED | Director | 10 Oct 2008 | 04 Dec 2013 | England | January 1967 | Scotts House, Scotts Lane, Marsh Gibbon, Bicester, Oxfordshire, OX27 0EZ |
| PABANI, Karim RESIGNED | Director | 29 Mar 2006 | 17 Sep 2007 | England | August 1966 | 2 Chipping Vale, Emerson Valley, Milton Keynes, MK4 2JN |
| PRAIL, Ashley Philip RESIGNED | Director | 28 Jun 2006 | 14 Dec 2016 | United Kingdom | July 1959 | Low Hall, Calverley Lane, Horsforth, Leeds, West Yorkshire, LS18 4GH |
| RILEY, Mathew John RESIGNED | Director | 01 Jun 2012 | 25 Jul 2016 | England | September 1965 | Arcadis House, 34, York Way, London, N1 9AB, England |
| ROWDEN, Andrew Murray RESIGNED | Director | 22 Jul 2013 | 14 Dec 2016 | England | June 1968 | Arcadis House, 34, York Way, London, N1 9AB, England |
| STAPLETON, Paul James RESIGNED | Director | 29 Mar 2006 | 04 Dec 2013 | United Kingdom | July 1960 | 21 Washford Close, Ingleby Barwick, Stockton On Tees, Cleveland, TS17 0FY |
| WEBBER, Paul Michael RESIGNED | Director | 04 Dec 2013 | 31 May 2019 | Scotland | September 1964 | Arcadis House, 34, York Way, London, N1 9AB, England |
| WOOLGAR, William Keith RESIGNED | Director | 29 Mar 2006 | 01 May 2010 | United Kingdom | March 1948 | Low Hall, Calverley Lane, Horsforth, Leeds, West Yorkshire, LS18 4GH |
| YOUELL, Philip Anthony RESIGNED | Director | 17 Sep 2007 | 10 Oct 2008 | England | December 1960 | Tullig House 5 The Close, Ashendon, Aylesbury, Buckinghamshire, HP18 0HX |