| HUBAND, Harriet Rosin ACTIVE | Secretary | 05 Dec 2025 | | | | 6th Floor, The Block, Space House, 12 Keeley Street, London, WC2B 4BA, England |
| BAROUDEL, Constance Frédérique ACTIVE | Director | 01 Sep 2026 | | United Kingdom | March 1974 | 6th Floor, The Block, Space House, 12 Keeley Street, London, WC2B 4BA, England |
| KAKARAKIS, Sophia Angeliki ACTIVE | Director | 04 Dec 2025 | | United Kingdom | December 1996 | Duo, Level 6, 280, Bishopsgate, London, EC2M 4RB, England |
| KWOK DREWSEN, Christopher ACTIVE | Director | 04 Dec 2025 | | United Kingdom | January 1989 | Duo, Level 6, 280, Bishopsgate, London, EC2M 4RB, England |
| NOON, Angela Margaret ACTIVE | Director | 01 Sep 2024 | | United Kingdom | December 1973 | 6th Floor, The Block, Space House, 12 Keeley Street, London, WC2B 4BA, England |
| WEISENBECK, Joshua ACTIVE | Director | 04 Dec 2025 | | United States | February 1982 | Duo, Level 6, 280, Bishopsgate, London, EC2M 4RB, England |
| BOUGHTON, Paul Victor RESIGNED | Secretary | 01 Jul 1991 | 07 May 1997 | | | 205 Coombe Lane, Wimbledon, London, SW20 0RG |
| DUNN, Rebecca Louise RESIGNED | Secretary | 28 Oct 2022 | 05 Dec 2025 | | | 6th Floor, The Block, Space House, 12 Keeley Street, London, WC2B 4BA, England |
| HAYWARD, Anthony Colin RESIGNED | Secretary | | 30 Jun 1991 | | | The White House 20 Shrublands Drive, Lightwater, Surrey, GU18 5QS |
| SERFÖZŐ, Mark Janos RESIGNED | Secretary | 01 Nov 2017 | 28 Oct 2022 | | | Melbourne House, 5th Floor, 44-46 Aldwych, London, WC2B 4LL, England |
| STEPHENS, Roger John RESIGNED | Secretary | 07 May 1997 | 01 Nov 2017 | | | Heritage House, Church Road, Egham, Surrey, TW20 9QD, England |
| ANDERSON, Nicholas John RESIGNED | Director | 01 Jun 2024 | 04 Dec 2025 | United Kingdom | January 1961 | 6th Floor, The Block, Space House, 12 Keeley Street, London, WC2B 4BA, England |
| BIGGAM, Robin Adair, Sir RESIGNED | Director | 01 Oct 1995 | 08 May 2001 | | July 1938 | Streatley House, Streatley, Bedfordshire, LU3 3PS |
| BITAR, Karim RESIGNED | Director | 01 Jul 2017 | 31 Dec 2021 | England | February 1965 | Heritage House, Church Road, Egham, Surrey, TW20 9QD, England |
| BLAIR, Stephen RESIGNED | Director | 07 Jan 2013 | 25 Feb 2014 | England | November 1959 | Heritage House, Church Road, Egham, Surrey, TW20 9QD, England |
| BOUGHTON, Paul Victor RESIGNED | Director | 06 Aug 1991 | 04 Oct 2004 | United Kingdom | September 1955 | 11 Esher Place Avenue, Esher, Surrey, KT10 8PU |
| BRIGHT, Keith, Sir RESIGNED | Director | 31 Aug 1993 | 30 Jun 1995 | United Kingdom | August 1931 | 16 Westbourne Park Villas, London, W2 5EA |
| CHAMBRE, Peter Alan RESIGNED | Director | 01 Aug 2006 | 02 Dec 2016 | England | November 1955 | Heritage House, Church Road, Egham, Surrey, TW20 9QD, England |
| DAVIS, Lisa Anne RESIGNED | Director | 25 Apr 2014 | 20 May 2016 | Usa | October 1963 | Heritage House, Church Road, Egham, Surrey, TW20 9QD, England |
| FAY, Michael Alan RESIGNED | Director | | 31 Mar 1996 | | September 1931 | Bradshaws Barn, Bepton, Midhurst, Sussex, GU29 0NA |
| GIVEN, Andrew Ferguson RESIGNED | Director | 05 Jun 2001 | 16 May 2007 | United Kingdom | November 1947 | Lower Holwell House, Cranbourne, Dorset, BH21 5QS |
| GOPINATH, Ravi Shankar, Dr RESIGNED | Director | 01 Jun 2021 | 04 Dec 2025 | Singapore | December 1965 | 6th Floor, The Block, Space House, 12 Keeley Street, London, WC2B 4BA, England |
| GRADDEN, Amanda Jane RESIGNED | Director | 16 Oct 2023 | 04 Dec 2025 | England | March 1968 | 6th Floor, The Block, Space House, 12 Keeley Street, London, WC2B 4BA, England |
| GREGSON, John, The Lord Gregson RESIGNED | Director | | 10 May 1994 | | January 1924 | The Spinney Cragg Vale, Mytholmroyd, Hebden Bridge, West Yorkshire, HX7 5SR |
| HARDING, Derek John RESIGNED | Director | 01 Mar 2019 | 31 Dec 2025 | United Kingdom | March 1973 | 6th Floor, The Block, Space House, 12 Keeley Street, London, WC2B 4BA, England |
| HARE, Steve RESIGNED | Director | 01 Dec 2004 | 21 Jul 2006 | | April 1961 | 3 Chestnut Close,, Banbury Road, Ettington, Stratford Upon Avon, Warwickshire, CV37 7SQ |
| HARRIS, Stephen Clive RESIGNED | Director | 02 Jun 2003 | 31 Jan 2008 | United Kingdom | May 1958 | Northolt, Thames Street, Sunbury On Thames, Middlesex, TW16 6AG |
| HAYWARD, Anthony Colin RESIGNED | Director | | 30 Jun 1991 | | April 1932 | The White House 20 Shrublands Drive, Lightwater, Surrey, GU18 5QS |
| HEATH, Andrew James RESIGNED | Director | 03 Sep 2018 | 31 Dec 2025 | England | January 1964 | 6th Floor, The Block, Space House, 12 Keeley Street, London, WC2B 4BA, England |
| HENWOOD, Alison Ayodele RESIGNED | Director | 01 Sep 2021 | 04 Dec 2025 | England | July 1965 | 6th Floor, The Block, Space House, 12 Keeley Street, London, WC2B 4BA, England |
| HUGHES, John Llewellyn Mostyn RESIGNED | Director | 01 Jun 2007 | 26 May 2017 | Uk | July 1951 | Heritage House, Church Road, Egham, Surrey, TW20 9QD, England |
| KING, Russell John RESIGNED | Director | 20 Oct 2010 | 22 May 2020 | England | November 1957 | Heritage House, Church Road, Egham, Surrey, TW20 9QD, England |
| KINGSBURY, Derek John RESIGNED | Director | | 31 Jan 1996 | | July 1926 | Trecarven Rock Road, Rock, Wadebridge, Cornwall, PL27 6LB |
| LAMB, Martin James RESIGNED | Director | 13 Sep 1999 | 17 May 2006 | United Kingdom | January 1960 | Packwood Hall, Glasshouse Lane Packwood, Solihull, West Midlands, B94 6PU |
| MACKRELL, Keith Ashley Victor RESIGNED | Director | 03 Aug 1993 | 13 Sep 1999 | United Kingdom | October 1932 | 34 Inner Park Road, Wimbledon, London, SW19 6DD |
| MURRAY, Leo, Professor RESIGNED | Director | 08 Jan 2003 | 17 May 2006 | | May 1943 | The Beeches, 2 Church Lane, Lathbury, Buckinghamshire, MK16 8JY |
| NILSSON, Hans Daniel RESIGNED | Director | 02 Dec 1997 | 25 May 2005 | England | September 1955 | 30 East Sheen Avenue, East Sheen, London, SW14 8AS |
| O'HIGGINS, John Edward RESIGNED | Director | 11 Jan 2006 | 28 Sep 2018 | England | February 1964 | Heritage House, Church Road, Egham, Surrey, TW20 9QD, England |
| OTTER, James Anthony RESIGNED | Director | 05 Jun 2001 | 09 Jul 2002 | United Kingdom | November 1957 | Porton Down, Science Park, Salisbury, Wiltshire, SP4 0JQ |
| PATTIE, Geoffrey Edwin RESIGNED | Director | | 04 May 1993 | England | January 1936 | 53 Free Trade Wharf, 340 The Highway, London, E1W 3ES |
| POULTER, John William RESIGNED | Director | | 16 May 2008 | England | November 1942 | 18 Harmont House, 20 Harley Street, London, W1G 9PH |
| QUELLMANN, Ulf RESIGNED | Director | 01 Jan 2015 | 31 Aug 2024 | Canada | April 1965 | Melbourne House, 5th Floor, 44-46 Aldwych, London, WC2B 4LL, England |
| READING, Anthony John RESIGNED | Director | 10 Mar 2004 | 19 May 2010 | United Kingdom | August 1943 | Station Road, Egham, Surrey, Tw20 9np. |
| SEEGER JR., William Claire RESIGNED | Director | 01 Jan 2015 | 23 May 2024 | United States | October 1951 | Melbourne House, 5th Floor, 44-46 Aldwych, London, WC2B 4LL, England |
| SWAINSON, Eric RESIGNED | Director | | 07 May 1997 | | December 1926 | Paddox Hollow, Norton Lindsey, Warwick, Warwickshire, CV35 8JA |
| TURNER, Catherine Lucy RESIGNED | Director | 01 Sep 2019 | 04 Dec 2025 | United Kingdom | June 1963 | 6th Floor, The Block, Space House, 12 Keeley Street, London, WC2B 4BA, England |
| WARREN, John Anthony RESIGNED | Director | 07 Mar 2006 | 24 Apr 2015 | England | June 1953 | Heritage House, Church Road, Egham, Surrey, TW20 9QD, England |
| WATSON, Clive Graeme RESIGNED | Director | 01 Oct 2006 | 25 Mar 2019 | England | February 1958 | Heritage House, Church Road, Egham, Surrey, TW20 9QD, England |
| WATSON, Peter RESIGNED | Director | 10 Mar 1997 | 07 May 2003 | England | January 1944 | 49 Suckling Green Lane, Wolverhampton, West Midlands, WV8 2BT |
| WEBSTER, James Charles RESIGNED | Director | 05 Oct 1993 | 30 Jun 2014 | England | June 1950 | Heritage House, Church Road, Egham, Surrey, TW20 9QD, England |
| WIKLUND, Kjersti RESIGNED | Director | 19 Jan 2017 | 04 Dec 2025 | United Kingdom | September 1962 | 6th Floor, The Block, Space House, 12 Keeley Street, London, WC2B 4BA, England |
| WILLIAMS, Andrew John RESIGNED | Director | 05 Dec 2025 | 31 Aug 2026 | United Kingdom | May 1967 | 6th Floor, The Block, Space House, 12 Keeley Street, London, WC2B 4BA, England |
| WILLIAMS, Ronald RESIGNED | Director | 11 Jul 1995 | 10 Jul 2001 | | February 1934 | 14 Longways, Wood Hill Avenue, Gerrards Cross, Buckinghamshire, SL9 8DW |
| WILLIAMSON, Mark David RESIGNED | Director | 26 May 2017 | 04 Dec 2025 | England | December 1957 | 6th Floor, The Block, Space House, 12 Keeley Street, London, WC2B 4BA, England |
| WYRSCH, Martha Brown RESIGNED | Director | 01 Jun 2012 | 14 May 2021 | United States | January 1958 | Heritage House, Church Road, Egham, Surrey, TW20 9QD, England |
| ZACHARIAS, James Graham RESIGNED | Director | 05 Sep 1995 | 13 Sep 2004 | England | March 1951 | Hillside, Mountview Road, Claygate, Surrey, KT10 0UD |