| Alan Richard Winter | Director | 21 Aug 1992 | 1 Jan 1993 | British | 76 years |
| Ali Reza Toutounchi | Director | 24 Jul 2014 | 31 Dec 2015 | British | 68 years |
| Andrew David Fairhurst | Secretary | 23 Aug 1993 | 1 Oct 2002 | British | - |
| Andrew Kevin Overy | Director | 29 Apr 2003 | 26 Apr 2013 | British | 61 years |
| Barry Holman | Director | 30 May 1992 | 31 Mar 2010 | British | 77 years |
| Charles Edward Tiplady | Director | 1 Dec 1993 | 1 Dec 1996 | British | 81 years |
| Christopher Anthony De Marco | Director | 29 Jun 2016 | 31 Jan 2017 | British,american | 61 years |
| Christopher Peter Chambers | Director | 1 Jan 2006 | 31 Mar 2010 | British | 68 years |
| Christopher Robinson | Director | 1 Dec 1994 | 31 Dec 2004 | British | 80 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 Michael Shaw | Director | 30 May 1992 | 1 Aug 1994 | British | 81 years |
| David Rough | Director | 30 May 1992 | 31 Dec 2001 | British | 75 years |
| David Scott Manning | Director | 30 May 1992 | 30 Apr 1995 | British | 77 years |
| Emma Elizabeth Douglas | Director | 5 Nov 2020 | 4 May 2021 | British | 61 years |
| Hugh Peter Bartholomew Cutler | Director | 26 Jul 2013 | 24 Apr 2014 | British | 54 years |
| Jeffrey Weeder | Director | 30 May 1992 | 22 Mar 1994 | British | 77 years |
| John William Roe | Director | 19 Mar 2013 | 7 Nov 2016 | British | 47 years |
| Jonathan Michael Vernon Rashleigh | Director | 30 May 1992 | 18 Nov 1993 | British | 76 years |
| Justin Christian Browne | Director | 26 Oct 2011 | 11 Sept 2019 | British | 56 years |
| Kevin John Gregory | Director | 11 Nov 2002 | 4 Jul 2012 | British | 69 years |
| Laura Jane Brown | Director | 10 Jan 2019 | 20 Sept 2024 | British | 47 years |
| Mark Joseph Zinkula | Director | 31 Aug 2011 | 18 Jan 2019 | American | 59 years |
| Mark Paul Johnson | Director | 6 Nov 2020 | 20 May 2025 | British | 61 years |
| Michael David Thomas Craston | Director | 13 Dec 2004 | 13 Nov 2014 | British | 68 years |
| Michael John Payne | Director | 30 May 1992 | 1 Jan 1993 | British | 81 years |
| Michelle Bella Barber | Director | N/A | 1 Jan 1993 | British | 74 years |
| Neil Malcolm Higgins | Director | 15 Nov 2007 | 31 May 2013 | British | 68 years |
| Pauline Plunkett | Director | 24 May 2017 | 11 Sept 2019 | Irish | 44 years |
| Peter Julian Lomax | Director | 1 Dec 1996 | 17 Apr 2003 | British | 83 years |
| Peter Nigel Horsman | Director | 30 May 1992 | 1 Dec 1994 | British | 80 years |
| Peter Robert Knapton | Director | 4 Jul 1994 | 31 Jul 2001 | British | 77 years |
| Randle George Williams | Director | 30 May 1992 | 19 Apr 1996 | British | 76 years |
| Randle George Williams | Director | 1 Oct 2002 | 12 Aug 2011 | British | 76 years |
| Robert Douglas Whitmore | Director | 1 May 1995 | 12 Feb 1996 | British | 74 years |
| Robert Hugh Bridges | Director | 19 Feb 2001 | 31 Dec 2002 | British | 83 years |
| Sarah Frances Elizabeth Aitken | Director | 9 Mar 2015 | 31 Oct 2025 | British | 62 years |
| Sharon Nicole Niebergall | Director | 19 Mar 2013 | 31 Mar 2016 | British | 61 years |
| Simon James Thompson | Director | 5 Mar 2015 | 5 Feb 2016 | British | 59 years |
| Simon William David Fraser | Director | 18 Jan 2019 | 23 Feb 2024 | British | 63 years |
| Siobhan Geraldine Boylan | Director | 12 Jul 2013 | 18 Jan 2019 | British | 57 years |
| Thomas Andrew Forwood Smith | Secretary | 30 May 1992 | 23 Aug 1993 | British | - |
| Timothy James Breedon | Director | 30 Nov 1992 | 31 Dec 2005 | British | 68 years |
| Vanessa Mary James | Director | 4 Dec 1995 | 8 Dec 2000 | British | 71 years |
| William Lindsay Ogden | Director | 1 Jan 1993 | 19 Apr 1996 | British | 78 years |
| William Mervyn Abbott | Director | 30 May 1992 | 1 Oct 2002 | British | 84 years |