| Christopher Stephen Wates | Director | 31 Jan 1992 | 27 May 1994 | British | 86 years |
| Christopher Stephen Wates | Director | 7 Sept 1998 | 23 Jan 2001 | British | 86 years |
| David Nicholas Pearson | Director | 6 May 2010 | 6 May 2010 | British | 57 years |
| Geoffrey Arthur Robert Coleman | Director | 1 Feb 2002 | 31 Dec 2008 | British | 73 years |
| Graham Anthony Flint | Director | 21 Sept 2023 | 26 Feb 2025 | British | 56 years |
| Graham Christopher Pye | Director | 17 Mar 1991 | 12 Jun 2009 | British | 86 years |
| John Michael Emery | Secretary | 1 Jul 1996 | 3 Jan 2002 | British | - |
| Jonathan Peter Spencer | Director | 27 May 1994 | 7 Aug 1998 | British | 71 years |
| Kenneth Roy Parsons | Secretary | 17 Mar 1991 | 1 Jul 1996 | British | - |
| Malcolm Robert Harris | Director | 17 Mar 1991 | 1 Apr 1997 | British | 77 years |
| Martin Trevor Digby Palmer | Secretary | 3 Jan 2002 | 25 Jun 2021 | British | - |
| Michael Sharpe | Director | 1 Apr 1997 | 31 Jan 2002 | British | 79 years |
| Neville Tullah | Director | 23 Jan 2001 | 12 Dec 2001 | British | 81 years |
| Nicholas Paul Twine | Director | 13 Nov 2008 | 31 Jan 2014 | British | 71 years |
| Paul David Phipps | Director | 12 Dec 2001 | 30 Jun 2006 | British | 73 years |
| Robert William Barter | Director | 12 Jun 2009 | 4 Apr 2023 | British | 79 years |
| Terry Philip Tedder | Director | 8 May 2014 | 28 Feb 2017 | British | 48 years |
| William Curtis Gair | Director | 17 Mar 1991 | 31 Jan 1992 | British | 83 years |