| GEORGE, Richard Jonathan ACTIVE | Secretary | 01 Mar 2014 | | | | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |
| BEKSA, Daniel ACTIVE | Director | 11 Mar 2024 | | Switzerland | April 1979 | Diethelm Keller Management Ltd., Muehlebachstrasse 20, PO BOX, 8032 Zurich, Switzerland |
| GEORGE, Richard Jonathan ACTIVE | Director | 08 Mar 2014 | | England | June 1977 | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |
| HAMER, Thomas Edward ACTIVE | Director | 12 Sep 2024 | | England | August 1979 | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |
| HAYWOOD, Stephen Martin RESIGNED | Secretary | | 07 Sep 1995 | | | 15 Avonmore Avenue, Guildford, Surrey, GU1 1TW |
| LEECH, Graham Louis RESIGNED | Secretary | 07 May 2003 | 01 Mar 2014 | | | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |
| WARNES, Vincent Edgar RESIGNED | Secretary | 14 Sep 1995 | 07 May 2003 | | | 44 Mount Pleasant, Ruislip, Middlesex, HA4 9HG |
| BOESIGER, Michel George RESIGNED | Director | 08 Dec 2006 | 30 Sep 2011 | Switzerland | March 1968 | Bundtenweg 19, Langendorf, Ch-4513, Switzerland |
| BUCKLE, Huw David RESIGNED | Director | 28 Aug 2009 | 28 Feb 2011 | England | March 1960 | 75a Ray Park Avenue, Maidenhead, Berkshire, SL6 8EG |
| CORNWELL, Nicholas Roy RESIGNED | Director | 24 Sep 2002 | 21 Aug 2017 | England | March 1959 | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |
| CROSBY-BROWN, Bruce Maxwell RESIGNED | Director | 20 Mar 2000 | 11 Jul 2003 | | February 1954 | 22 Lister Drive, Northampton, Northamptonshire, NN4 9XE |
| ERNST, Christoph Marc RESIGNED | Director | 09 Jan 2012 | 11 Nov 2013 | Switzerland | July 1972 | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |
| FITZGERALD, William Kevin RESIGNED | Director | 17 Jul 1996 | 06 Feb 2002 | England | March 1954 | 17 Salisbury Road, Harrow, Middlesex, HA1 1NU |
| HABICHT, Tina RESIGNED | Director | 08 Dec 2006 | 31 May 2011 | Switzerland | December 1966 | Zurichstrasse 146, Kusnacht, Ch-8700, Switzerland |
| HAYWOOD, Stephen Martin RESIGNED | Director | | 07 Sep 1995 | | February 1949 | 15 Avonmore Avenue, Guildford, Surrey, GU1 1TW |
| HOLTON, Leonard Charles RESIGNED | Director | | 02 Jun 2000 | | June 1947 | 3 Colbeck, Church Crookham, Fleet, Hampshire, GU13 0XQ |
| HUNT, Nicholas RESIGNED | Director | 01 Oct 2018 | 13 Nov 2023 | England | January 1965 | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |
| KALMEIJER, Johannes Paulus Adrianus RESIGNED | Director | 01 Apr 2003 | 21 Oct 2004 | | June 1956 | 10 Hill Gardens, Streatley On Thames, Reading, Berkshire, RG8 9QF |
| LEECH, Graham Louis RESIGNED | Director | 24 Sep 2002 | 07 Mar 2014 | United Kingdom | September 1948 | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |
| LEVENE, Michael RESIGNED | Director | | 08 Dec 2006 | | May 1942 | 19 West Heath Road, London, NW3 7UU |
| LIPPUNER, Daniel RESIGNED | Director | 31 May 2010 | 30 Sep 2011 | Switzerland | May 1972 | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |
| LIVESEY, Christopher Paul RESIGNED | Director | 21 Mar 1994 | 23 Dec 1999 | | February 1960 | Maple House, Aston Rowant Road Aston Rowant, Watlington, Oxfordshire, OX49 5SN |
| MARKS, Paul RESIGNED | Director | 02 Sep 2002 | 08 Dec 2006 | England | September 1935 | 48 Regents Park Road, London, NW1 7SX |
| MASON, Jane Elisabeth Catherine RESIGNED | Director | 01 Mar 2024 | 12 Sep 2024 | England | June 1971 | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |
| MEEK, Glenn Raymond RESIGNED | Director | 01 Sep 2006 | 24 Dec 2008 | | February 1959 | 59 Tregony Road, The Maples, Orpington, Kent, BR6 9XE |
| MERZ, Benjamin Oliver RESIGNED | Director | 23 Aug 2021 | 11 Mar 2024 | Switzerland | October 1988 | Diethelm Keller Management Ltd, Muehlebachstrasse 20, PO BOX, 8032, Zurich, Switzerland |
| MOODY, Robert Henry RESIGNED | Director | 24 Sep 2002 | 07 Mar 2014 | England | March 1953 | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |
| MUELLER, Martina Ursula RESIGNED | Director | 31 Jan 2013 | 10 Jul 2013 | Switzerland | February 1969 | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |
| PIAZ, Josef Franz RESIGNED | Director | 08 Dec 2006 | 31 May 2010 | Switzerland | February 1945 | Guggerstrasse 24, Zollikon, 8702, Switzerland |
| RACE, Grant Philip RESIGNED | Director | 01 Oct 2018 | 22 Oct 2021 | United Kingdom | July 1966 | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |
| SCHWENDENER, Beat RESIGNED | Director | 06 Feb 2018 | 21 Sep 2021 | Switzerland | July 1969 | Diethelm Keller Group, Muehlebachstrasse 20, Zurich, Switzerland |
| STUTZ, Rene Henry RESIGNED | Director | 01 Feb 2020 | 08 Dec 2023 | England | April 1959 | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |
| THOMAS, Pierre Gilles Marie RESIGNED | Director | 01 Jul 2017 | 03 Aug 2018 | England | January 1967 | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |
| VON ARX, Josef Peter RESIGNED | Director | 08 Dec 2006 | 31 Jan 2013 | Switzerland | May 1954 | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |
| WALSH, Philip James RESIGNED | Director | 01 Mar 1995 | 19 Sep 2000 | | August 1958 | Long Acre Hoden Lane, Cleeve Prior, Evesham, Worcestershire, WR11 5LH |
| WARNES, Vincent Edgar RESIGNED | Director | 14 Sep 1995 | 22 Nov 2004 | | January 1959 | 44 Mount Pleasant, Ruislip, Middlesex, HA4 9HG |
| WILCOX, Spencer John RESIGNED | Director | | 30 Apr 1993 | | January 1946 | 29 Clarence Road, Teddington, Middlesex, TW11 0BN |
| WILPER, Frank RESIGNED | Director | 31 Jan 2013 | 23 Jan 2018 | Switzerland | August 1972 | Bridge House, Eelmoor Road, Farnborough, Hampshire, GU14 7UE |