| Adam Peter Fowle | Director | 6 Feb 2014 | 3 Mar 2020 | British | 67 years |
| Alexander Jonathan Stewart | Director | 29 May 2001 | 20 Jan 2011 | British | 77 years |
| Brian Jonathan Magnus | Director | 3 Mar 2020 | 8 Aug 2022 | British | 60 years |
| Charles Richard Foster Kemp | Director | 27 Nov 1992 | 20 Apr 1995 | British | 69 years |
| Christopher James Pitt | Director | 27 Nov 1992 | 21 Jan 1997 | British | 80 years |
| David Alan Harding | Director | 6 Nov 2003 | 31 Jan 2013 | British | 79 years |
| David Clarke | Director | 27 Nov 1992 | 7 Jul 1993 | British | 81 years |
| David Colbron George | Director | 27 Nov 1992 | 20 Jan 2011 | British | 75 years |
| David Colbron George | Secretary | 27 Nov 1992 | 1 Oct 2009 | British | - |
| David Ossian Maloney | Director | 10 Jul 2008 | 5 Jul 2018 | British | 71 years |
| Gordon William Harrison | Director | 20 Oct 1994 | 30 Sept 2006 | British | 69 years |
| Graham Edward Tuppen | Director | 27 Nov 1992 | 6 Feb 2014 | British | 74 years |
| Hubert Valentine Reid | Director | 21 Jan 1997 | 31 Mar 2012 | British | 86 years |
| Ian Timothy Payne | Director | 3 Mar 2020 | 26 Jan 2024 | British | 73 years |
| James Andrew Poole | Secretary | 1 Oct 2009 | 1 Feb 2013 | British | - |
| Jane Bednall | Director | 2 Jul 2018 | 3 Mar 2020 | British | 59 years |
| John Gale Mardon | Director | 27 Nov 1992 | 24 Oct 1995 | British | 96 years |
| Keith Malcolm Hedley Millar | Director | 29 Sept 1995 | 24 Jan 2002 | British | 93 years |
| Loretta Anne Togher | Secretary | 1 Feb 2013 | 29 May 2020 | - | - |
| Manjit Dale | Director | 3 Mar 2020 | 8 Aug 2022 | British | 61 years |
| Maria Luisa Cassoni | Director | 1 Apr 2015 | 3 Mar 2020 | Italian | 75 years |
| Michael Frederick Garner | Director | 29 Sept 1995 | 20 Jan 2005 | British | 89 years |
| Michael Noel Francis Cottrell | Director | 27 Nov 1992 | 29 Oct 1996 | British | 88 years |
| Neil Reynolds Smith | Director | 20 Jan 2011 | 3 Mar 2020 | British | 61 years |
| Nigel Patrick Stringer Moss | Director | 27 Nov 1992 | 31 Aug 1994 | British | 80 years |
| Peter Jeffrey Baguley | Director | 31 Jan 2013 | 3 Mar 2020 | British | 73 years |
| Robert Malcolm Walker | Director | 9 Feb 2012 | 3 Mar 2020 | British | 81 years |
| Sidney Milne Donald | Director | 27 Nov 1992 | 24 Oct 1995 | British | 84 years |
| Simon David Longbottom | Director | 3 Mar 2020 | 24 Feb 2023 | British | 55 years |
| Susan Elizabeth Murray | Director | 3 Nov 2004 | 6 Feb 2014 | British | 69 years |
| William Simon Townsend | Director | 1 Oct 2000 | 3 Mar 2020 | British | 64 years |