| Alan Richard Winter | Director | 30 May 1992 | 30 Jun 1994 | British | 76 years |
| Alexander Smedley Wilson | Director | 1 Mar 1999 | 31 Dec 2007 | British | 72 years |
| Andrew Banks | Director | 17 Apr 2003 | 22 Dec 2006 | British | 62 years |
| Andrew Banks | Director | 21 Aug 2008 | 18 Sept 2019 | British | 62 years |
| Andrew David Fairhurst | Secretary | 23 Aug 1993 | 1 Oct 2002 | British | - |
| Charles Edward Tiplady | Director | 1 Dec 1993 | 1 Dec 1996 | British | 81 years |
| Charles Richard Walker | Director | 1 Aug 2011 | 14 Jun 2018 | British | 54 years |
| Christopher Charles Daniels | Director | 30 May 1992 | 1 Sept 1992 | British | 81 years |
| Christopher Peter Chambers | Director | 1 Jan 2006 | 31 Mar 2010 | British | 68 years |
| Clare Frances Carson | Secretary | 1 Oct 2002 | 29 Aug 2003 | British | - |
| David Anthony Ormerod | Director | 30 May 1992 | 21 Aug 1992 | British | 84 years |
| David Rough | Director | 30 May 1992 | 31 Mar 2002 | British | 75 years |
| Dennis William Willitt | Director | 8 Sept 1997 | 20 Oct 2000 | British | 86 years |
| Helen Christine Gordon | Director | 4 Feb 2004 | 17 Oct 2011 | British | 67 years |
| Jeremy Clive Michell | Director | 30 May 1992 | 28 Apr 1995 | British | 78 years |
| Jeremy Colin Gamul Edwards | Director | 30 May 1992 | 1 Sept 1992 | British | 87 years |
| Jonathan Michael Vernon Rashleigh | Director | 1 Sept 1992 | 18 Nov 1993 | British | 76 years |
| Katherine Morere Ruth Laurenson | Director | 11 Dec 2014 | 2 Dec 2019 | New Zealander | 52 years |
| Kevin John Gregory | Director | 8 Nov 2002 | 4 Jul 2012 | British | 69 years |
| Lauren Siobhan Aoife Masson | Director | 28 Oct 2022 | 1 Sept 2024 | Irish | 42 years |
| Mark Joseph Zinkula | Director | 14 Sept 2011 | 15 Jul 2019 | American | 59 years |
| Mark Peter Creedy | Director | 23 Sept 2002 | 21 Jul 2008 | British | 72 years |
| Paul Alexander Edwards | Director | 21 Aug 2008 | 2 Dec 2019 | British | 62 years |
| Peter Julian Lomax | Director | 1 Dec 1996 | 17 Apr 2003 | British | 83 years |
| Robin Edouard Martin | Director | 27 Jul 2012 | 2 Dec 2019 | British | 50 years |
| Sam Fuschillo | Director | 21 Jan 2020 | 28 Oct 2022 | British | 45 years |
| Siobhan Geraldine Boylan | Director | 12 Jul 2013 | 18 Jan 2019 | British | 57 years |
| Stephen John Mundy | Director | 4 Sept 1995 | 29 Aug 2003 | British | 68 years |
| Stuart Robert Hartley Beevor | Director | 3 Oct 1994 | 31 Jan 2002 | British | 69 years |
| Susan Roche | Director | 12 Nov 1993 | 30 Apr 2008 | British | 78 years |
| Thomas Andrew Forwood Smith | Secretary | 30 May 1992 | 23 Aug 1993 | British | - |
| Timothy James Breedon | Director | 1 Jan 2002 | 31 Dec 2005 | British | 68 years |
| William Hughes | Director | 1 Jan 2008 | 2 Oct 2025 | British | 60 years |
| William Lindsay Ogden | Director | 30 May 1992 | 15 May 1998 | British | 78 years |