| Alistair Thomas Sloan | Director | 29 Aug 1991 | 13 Feb 1997 | British | 68 years |
| Alistair Thomas Sloan | Secretary | 29 Aug 1991 | 11 Sept 1996 | British | - |
| Amanda Catherine Matthews | Secretary | 22 Apr 2025 | 2 Jun 2025 | - | - |
| Andrew Boyle | Director | 5 Sept 2013 | 6 Mar 2024 | British | 64 years |
| Andrew Michael Stoddart | Director | 15 May 1997 | 13 Feb 2001 | British | 80 years |
| Andrew Paton | Director | 17 Dec 2008 | 21 Oct 2010 | British | 66 years |
| Andrew Paton | Director | 1 Mar 2016 | 25 Mar 2024 | British | 66 years |
| Anthony James Brown | Director | 7 Mar 2000 | 8 Nov 2013 | British | 62 years |
| Barbara Jane Moorhouse | Director | 13 Feb 1997 | 7 Apr 1998 | British | 68 years |
| Clare Sheridan | Secretary | 31 May 2014 | 27 Jun 2024 | - | - |
| Damien Francis Kenny | Director | 1 Oct 2010 | 31 Jan 2013 | British | 67 years |
| David Henderson | Director | 1 Jan 1997 | 6 Mar 2000 | British | 67 years |
| David Kevin Mulligan | Director | 1 Apr 2004 | 25 Feb 2013 | British | 57 years |
| Helen Mary Mason | Secretary | 27 Jun 2024 | 22 Apr 2025 | - | - |
| Henry Robert Bartlett | Director | 12 Jul 2007 | 19 Apr 2010 | British | 74 years |
| Isobel Mary Nettleship | Secretary | 9 Feb 2005 | 31 May 2014 | British | - |
| Janice Lynne Robertson | Director | 24 Oct 1995 | 25 Oct 1996 | British | 61 years |
| John Baker | Director | 17 Dec 2008 | 1 Dec 2022 | British | 61 years |
| John Brian Nugent | Director | 28 Dec 1994 | 1 Jan 1997 | British | 82 years |
| John Christopher Morgan | Director | 29 Aug 1991 | 5 Dec 2000 | British | 71 years |
| John Hamilton Hooper | Director | 29 Aug 1991 | 1 Jan 1997 | British | 83 years |
| John Mark Illingworth | Director | 11 Nov 1994 | 30 May 1995 | British | 70 years |
| John Michael Bishop | Director | 7 Apr 1998 | 1 Jun 2005 | British | 81 years |
| Julian John Lebray | Director | 1 Oct 2010 | 1 Feb 2018 | British | 59 years |
| Keith Adams | Director | 1 Jan 1997 | 31 Dec 1998 | British | 77 years |
| Keith Adams | Director | 1 Nov 2000 | 31 Dec 2003 | British | 77 years |
| Neil Skelding | Director | 17 Jun 2013 | 7 Oct 2020 | British | 55 years |
| Paul Anthony Brown | Director | 12 Jul 2007 | 10 Nov 2010 | British | 63 years |
| Paul David Gibbons | Director | 11 Jul 1994 | 24 Mar 1995 | British | 81 years |
| Paul Desmond George Newton | Director | 1 Jun 1998 | 31 Dec 2012 | British | 63 years |
| Paul Whitmore | Director | 2 Jul 2001 | 31 Dec 2013 | British | 71 years |
| Robert Archibald William Marshall | Director | 20 Mar 1994 | 4 Apr 1995 | British | 94 years |
| Robert Henry Banister | Director | 19 Apr 2010 | 29 Mar 2023 | British | 67 years |
| Stephen Elliott | Director | 2 Sept 1996 | 11 Oct 2013 | British | 66 years |
| Stephen John Berry | Director | 1 Sept 1997 | 18 May 1998 | British | 64 years |
| Stephen Paul Crummett | Director | 26 Feb 2013 | 7 May 2024 | British | 61 years |
| Timothy Geoffrey Smith | Director | 5 Jan 2004 | 20 Dec 2013 | British | 72 years |
| William Raymond Johnston | Director | 13 Feb 2001 | 1 Jun 2005 | British | 81 years |
| William Raymond Johnston | Secretary | 11 Nov 1994 | 1 Jun 2005 | British | - |