| ARNOLD, Simon ACTIVE | Secretary | 21 Nov 2017 | | | | Thames House, Oxford Road, Benson, Wallingford, Oxfordshire, OX10 6LX |
| ARNOLD, Simon ACTIVE | Director | 01 Dec 2020 | | England | March 1977 | Thames House, Oxford Road, Benson, Wallingford, Oxfordshire, OX10 6LX |
| FAGAN, Edward Willoughby ACTIVE | Director | 01 Jun 2026 | | England | July 1986 | Thames House, Oxford Road, Benson, Wallingford, Oxfordshire, OX10 6LX |
| GRUNDON, Neil Norman ACTIVE | Director | 29 Apr 1997 | | England | August 1969 | Thames House, Oxford Road, Benson, Wallingford, Oxfordshire, OX10 6LX, United Kingdom |
| GRUNDON, Norman Stephen ACTIVE | Director | | | England | November 1941 | Thames House, Oxford Road, Benson, Wallingford, Oxfordshire, OX10 6LX, United Kingdom |
| HARRIS, Jonathan Peter ACTIVE | Director | 01 Jan 2021 | | United Kingdom | June 1968 | Thames House, Oxford Road, Benson, Wallingford, Oxfordshire, OX10 6LX |
| ROBINSON, Toni Michelle ACTIVE | Director | 19 Aug 2024 | | England | May 1968 | Thames House, Oxford Road, Benson, Wallingford, Oxfordshire, OX10 6LX |
| SMITH, Bradley James ACTIVE | Director | 01 Oct 2013 | | England | November 1977 | Lakeside Road, Lakeside Road, Colnbrook, SL3 0EG, England |
| SULLIVAN-WEBB, Clayton Sinclair ACTIVE | Director | 19 Aug 2003 | | United Kingdom | February 1973 | Thames House, Oxford Road, Benson, Wallingford, Oxfordshire, OX10 6LX, United Kingdom |
| STEGGALL, Derek RESIGNED | Secretary | | 23 Apr 2002 | | | 7 Mulberry Court, Holmer Green, High Wycombe, Buckinghamshire, HP15 6TF |
| SULLIVAN-WEBB, Clayton Sinclair RESIGNED | Secretary | 23 Apr 2002 | 21 Nov 2017 | | | Thames House, Oxford Road, Benson, Wallingford, Oxfordshire, OX10 6LX, United Kingdom |
| ATKINSON, Philip John RESIGNED | Director | 22 Jan 2019 | 31 May 2026 | England | December 1977 | Thames House, Oxford Road, Benson, Wallingford, Oxfordshire, OX10 6LX |
| BLAKE, Colin Francis RESIGNED | Director | | 22 May 1995 | | January 1936 | 48 Stanwell Road, Ashford, Middlesex, TW15 3ER |
| GRUNDON, Jessie RESIGNED | Director | | 15 Dec 1993 | | July 1912 | Ewelme House Kingston Lane, Hillingdon, Uxbridge, Middlesex, UB8 3PW |
| GRUNDON, Stephen Lewis RESIGNED | Director | | 03 Sep 2005 | | August 1911 | Ewelme House Kingston Lane, Hillingdon, Uxbridge, Middlesex, UB8 3PW |
| MALONE, Andrew Peter RESIGNED | Director | 02 Aug 2010 | 30 Nov 2017 | United Kingdom | May 1952 | Thames House, Oxford Road, Benson, Wallingford, Oxfordshire, OX10 6LX, United Kingdom |
| MITCHELL, Anthony John RESIGNED | Director | | 28 Apr 2005 | | March 1942 | Nyanga 14 Charters Way, Charters Way, Sunningdale, Berkshire, SL5 9QQ |
| ROSCOE, Stephen Brian RESIGNED | Director | 02 Aug 2010 | 19 Aug 2024 | United Kingdom | August 1959 | Thames House, Oxford Road, Benson, Wallingford, Oxfordshire, OX10 6LX, United Kingdom |
| SHORT, Andrew Graham John RESIGNED | Director | 01 Oct 2012 | 28 Feb 2018 | England | November 1966 | Thames House, Oxford Road, Benson, Wallingford, Oxfordshire, OX10 6LX, United Kingdom |
| SKEHENS, Richard Macandrew RESIGNED | Director | 22 Jan 2002 | 31 Jul 2014 | United Kingdom | June 1950 | Thames House, Oxford Road, Benson, Wallingford, Oxfordshire, OX10 6LX, United Kingdom |
| STEGGALL, Derek RESIGNED | Director | | 30 Jun 2003 | | September 1941 | 7 Mulberry Court, Holmer Green, High Wycombe, Buckinghamshire, HP15 6TF |
| WILLGOSS, Ralph Richard RESIGNED | Director | | 30 Sep 1992 | | September 1924 | Glanford Goring Road, Woodcote, Reading, Berkshire, RG8 0QE |