| Aderemi Ladega | Secretary | 11 Apr 2005 | 21 Jun 2007 | British | - |
| Andrea Margaret Thomas | Secretary | 1 Sept 1997 | 11 Apr 2005 | Other | - |
| Anthony Talbot Heffernan James Considine | Director | 1 Apr 1999 | 1 Dec 2002 | Irish | 72 years |
| Athanasios Rigas | Director | 17 Sept 2020 | 30 Jun 2022 | Greek | 59 years |
| Brian Michael Puffer | Director | 1 Jan 2010 | 6 Feb 2018 | British,american | 57 years |
| Brian Peevor | Secretary | 9 Feb 1994 | 31 Aug 1997 | British | - |
| Cassandra Higham | Director | 12 Feb 2025 | 1 Jun 2025 | British | 47 years |
| Christopher Kuangcheng Gerald Eng | Secretary | 23 Mar 2009 | 30 Jun 2010 | - | - |
| Colin Robert Goodall | Director | 1 May 1996 | 1 Feb 1998 | British | 82 years |
| David Charles Goosey | Director | 1 Nov 2012 | 1 Apr 2015 | British | 64 years |
| David Hulf | Director | 1 Aug 1999 | 30 Dec 2004 | British | 76 years |
| Edward Victor Dewson | Director | 1 Feb 1998 | 1 Aug 1999 | British | 84 years |
| Francis William Michael Starkie | Director | 1 Jul 1998 | 30 Sept 2009 | British | 77 years |
| Frederic Jean Baudry | Director | 1 Jun 2007 | 18 Mar 2009 | French | 61 years |
| Gary Edward Reading | Director | 27 Feb 2020 | 1 Jun 2025 | British | 54 years |
| Gillian Elizabeth Young | Secretary | 21 Sept 1992 | 9 Feb 1994 | British | - |
| Henry Philip Labram | Director | 1 Feb 1995 | 30 Apr 1996 | British | 76 years |
| Iain Fraser Macdonald | Director | 30 Dec 2004 | 31 Dec 2009 | British | 69 years |
| John Joseph Carey | Director | 1 Jun 2010 | 1 Apr 2014 | Irish,american | 64 years |
| Jorge Manuel Da Silva Tavares | Director | 21 Sept 1992 | 16 Jun 1993 | Portuguese | 85 years |
| Kevin Lee James | Director | 1 Dec 2002 | 15 Sept 2006 | American | 69 years |
| Luigi Tedesco | Director | 25 Mar 2009 | 31 Oct 2012 | Italian | 58 years |
| Lynn Paul Waterman | Director | 1 Aug 2009 | 1 Jun 2010 | British | 62 years |
| Mario Mifsud | Director | 30 Jun 2022 | 27 May 2024 | British | 57 years |
| Mathieu Antoine Boulandet | Director | 15 Oct 2024 | 6 Jan 2025 | French | 44 years |
| Nicholas John Carrie | Director | 21 Sept 1992 | 31 Jan 1995 | British | 90 years |
| Norman Anthony Roxburgh | Director | 16 Jun 1993 | 31 Mar 1996 | British | 81 years |
| Paul Ian Winton Turner | Director | 1 Apr 2015 | 1 Nov 2017 | British | 63 years |
| Paul Ian Winton Turner | Director | 29 Aug 2018 | 24 Jan 2020 | British | 63 years |
| Peter Graham Watt | Director | 27 Feb 2020 | 1 Mar 2023 | British | 40 years |
| Rebecca Jayne Wright | Secretary | 21 Jun 2007 | 30 Jun 2010 | Other | - |
| Robert Kelly Purvis | Director | 1 May 1996 | 30 Jun 1998 | American | 84 years |
| Roger Christopher Harrington | Director | 1 Oct 2009 | 23 Aug 2013 | British | 60 years |
| Shiva Pezeshki Mcmahon | Director | 29 Aug 2018 | 17 Sept 2018 | British | 58 years |
| Sue Hodel Rataj | Director | 15 Sept 2006 | 1 Feb 2007 | United States | 69 years |
| Terence Michael Thornton | Director | 23 Aug 2013 | 1 Jul 2020 | British | 63 years |
| Yasin Stanley Ali | Secretary | 19 Feb 2001 | 30 Jun 2010 | - | - |
