| Alan William Eatwell | Director | 3 Apr 1995 | 30 Jun 2001 | British | 73 years |
| Arthur Walter Townsend | Director | N/A | 31 Jul 1992 | British | 99 years |
| Bernard Edmund Haile | Director | N/A | 1 Mar 1994 | British | 87 years |
| Bernard Edmund Haile | Secretary | N/A | 1 Mar 1994 | British | - |
| Christian Schreyer | Director | 5 Nov 2021 | 10 Jun 2022 | German | 58 years |
| Christopher Moyes | Director | 1 Mar 1994 | 8 Jul 2006 | British | 77 years |
| David Allen Brown | Director | 1 Apr 2011 | 5 Nov 2021 | British | 66 years |
| David Beaman | Director | N/A | 1 Mar 1994 | British | 73 years |
| David Lloyd Thomas | Director | 12 Mar 1998 | 14 Dec 2000 | British | 65 years |
| Douglas Jamieson Adie | Director | 5 Sept 1995 | 30 Nov 2001 | British | 85 years |
| Elodie Marie Francoise Brian | Director | 5 Jun 2019 | 27 Sept 2021 | French | 47 years |
| Ernest Alan Youdell | Director | 28 Jul 1992 | 1 Mar 1994 | British | 101 years |
| Gerald Mitchell | Director | N/A | 31 Jan 1993 | British | 88 years |
| Gordon Alexander Boyd | Director | 28 Sept 2021 | 28 Mar 2022 | British | 66 years |
| Helen Fowweather | Director | 1 Sept 2005 | 24 Sept 2012 | British | 63 years |
| Ian Philip Butcher | Director | 1 Apr 1996 | 1 Jul 2007 | British | 75 years |
| Ian Philip Butcher | Secretary | 1 Apr 1996 | 30 Jun 2006 | British | - |
| Keith Anthony Moffatt | Director | 1 May 1994 | 30 Apr 2000 | British | 72 years |
| Keith Down | Director | 7 Mar 2011 | 6 Dec 2015 | British | 61 years |
| Keith Lawrence Ludeman | Director | 10 Jul 2006 | 2 Jul 2011 | British | 76 years |
| Louisa Marie Weeks | Director | 1 Mar 2005 | 31 Jul 2012 | British | 54 years |
| Martin Stanley Andrew Ballinger | Director | 1 Mar 1994 | 31 Dec 2004 | British | 83 years |
| Nicholas Swift | Director | 17 Jul 2007 | 7 Mar 2011 | British | 62 years |
| Nigel Wilfrid Eggleton | Director | 1 Dec 2001 | 24 Apr 2006 | British | 68 years |
| Paul Hennigan | Director | 1 Apr 2019 | 13 Aug 2024 | British | 47 years |
| Peter Frederick Lanfranchi | Director | 7 Mar 1994 | 3 Apr 1995 | British | 87 years |
| Philip Richard Southall | Director | 1 Jul 2012 | 16 Nov 2022 | British | 50 years |
| Philip William Kirk | Director | 17 Nov 1997 | 31 Oct 2014 | British | 64 years |
| Raymond Woodhouse | Director | 1 Nov 2003 | 28 Nov 2019 | British | 73 years |
| Simon Patrick Butcher | Director | 14 Mar 2016 | 30 Nov 2018 | British | 59 years |
| Trevor Halliday Shears | Director | 1 Mar 1994 | 31 Mar 1996 | British | 81 years |
| Trevor Halliday Shears | Secretary | 1 Mar 1994 | 31 Mar 1996 | British | - |