| Alan Peters | Director | 8 Jun 1991 | 11 Apr 2003 | British | 83 years |
| Allan Leslie Leighton | Director | 1 Jan 1995 | 3 Oct 2003 | British | 72 years |
| Carol Jayne Nunn | Secretary | 11 Jul 2000 | 31 Jan 2004 | British | - |
| Christopher Carney | Director | 2 May 2008 | 28 Jan 2011 | British | 51 years |
| Christopher John Hatch | Director | 27 Jun 2002 | 3 Oct 2003 | British | 77 years |
| Christopher Philip Watts | Director | 16 Jan 2007 | 31 Aug 2007 | British | 64 years |
| Colin Richard Clapham | Director | 31 Oct 2014 | 31 Oct 2019 | British | 80 years |
| David Edward Smith | Director | 28 Jan 2011 | 31 Oct 2014 | British | 57 years |
| Frederick Connolly Thomas Wilson | Director | 8 Jun 1991 | 22 May 1992 | British | 91 years |
| Graeme Reid Mccallum | Director | 19 Nov 2001 | 16 Jan 2007 | British | 78 years |
| Ian Craig Black | Director | 8 Jun 1991 | 30 Jun 1999 | British | 82 years |
| James Rodier Kerr-muir | Director | 11 Apr 2003 | 3 Oct 2003 | British | 84 years |
| Jennifer Canty | Director | 24 Apr 2024 | 30 Sept 2025 | British | 32 years |
| Joanne Louise Kenrick | Director | 17 Apr 2001 | 27 Jun 2002 | British | 59 years |
| John Edwin Coker | Director | 27 Jun 2002 | 3 Oct 2003 | British | 79 years |
| John Frederick Tutte | Director | 2 Sept 1997 | 26 Oct 2001 | British | 69 years |
| John Grant Napier | Director | 3 Oct 2003 | 29 Mar 2004 | British | 76 years |
| John Michael Weir | Director | 2 Sept 1997 | 30 Apr 2002 | British | 75 years |
| Jonathan Charles Murrin | Director | 19 Jul 2007 | 2 May 2008 | British | 56 years |
| Julia Katherine Budd | Director | 17 Apr 2001 | 3 Oct 2003 | British | 67 years |
| Katherine Elizabeth Hindmarsh | Director | 31 Oct 2019 | 9 Oct 2023 | British | 36 years |
| Lynn Anthony Wilson | Director | 8 Jun 1991 | 3 Oct 2003 | British | 86 years |
| Martin Richard Landau | Director | 1 Jun 1992 | 3 Oct 2003 | British | 88 years |
| Michael Andrew Lonnon | Director | 17 Jul 2015 | 9 Dec 2024 | British | 68 years |
| Michael Andrew Lonnon | Secretary | 31 Aug 2007 | 9 Dec 2024 | British | - |
| Michael John Hollingbery | Director | 8 Jun 1991 | 26 Apr 1996 | British | 92 years |
| Omolola Olutomilayo Adedoyin | Director | 9 Oct 2023 | 24 Apr 2024 | British | 50 years |
| Peter Robert Andrew | Director | 22 Dec 2008 | 17 Jul 2015 | British | 66 years |
| Peter Thomas Johnson | Director | 3 Oct 2003 | 29 Mar 2004 | British | 71 years |
| Raymond Anthony Peacock | Director | 2 May 2008 | 22 Dec 2008 | British | 59 years |
| Richard Ian Morbey | Director | 29 Mar 2004 | 31 Aug 2007 | British | 79 years |
| Richard Ian Morbey | Secretary | 31 Jan 2004 | 31 Aug 2007 | British | - |
| Robert David Green | Director | 5 Mar 2001 | 3 Oct 2003 | British | 70 years |
| Samuel David Lawther | Director | 8 Jun 1991 | 5 Mar 2001 | British | 68 years |
| Samuel David Lawther | Secretary | 8 Jun 1991 | 11 Jul 2000 | British | - |
| William Ainscough | Director | 11 Apr 2001 | 27 Jun 2002 | British | 77 years |
| William Henry Bannister | Director | 27 Jun 2002 | 3 Oct 2003 | British | 76 years |
| William John Holland-kaye | Director | 23 Aug 2007 | 2 May 2008 | British | 60 years |