| Alan Matthew Thomson | Director | 25 May 1992 | 14 Apr 1995 | American | 80 years |
| Andrew Michael Smith | Director | 12 Apr 2006 | 30 Sept 2011 | British | 63 years |
| Andrew Robert Astin | Secretary | 20 Jul 1994 | 30 Jun 1999 | British | - |
| Anthony Romer Beevor | Director | 22 Jan 1993 | 10 Jan 2000 | British | 86 years |
| Cyril Patrick Jackson | Director | 25 May 1992 | 30 Jun 1996 | British | 90 years |
| Daphne Margaret Murray | Secretary | 6 Dec 2012 | 30 Jun 2018 | - | - |
| David Alan Harding | Director | 19 Oct 1998 | 15 May 2000 | British | 79 years |
| David Hargreaves | Director | 25 May 1992 | 30 Jun 1996 | British | 96 years |
| David John Charlton Mcateer | Director | 13 Mar 1995 | 31 Oct 1999 | British | 87 years |
| David Richard Swinson | Director | 10 Jan 2000 | 31 Jul 2000 | British | 84 years |
| Edward John Worlidge | Director | 25 May 1992 | 6 May 1994 | British | 98 years |
| Emma Jayne Ashenden | Secretary | 25 Jan 2021 | 2 Feb 2023 | - | - |
| Frank James Standish | Secretary | 31 May 2000 | 4 Sept 2000 | British | - |
| Geoffrey Arthur Higham | Director | 25 May 1992 | 30 Sept 1996 | British | 99 years |
| Graham Edward Clark | Director | 4 Sept 2000 | 2 Oct 2002 | British | 71 years |
| Ian Powell Bancroft | Director | 25 May 1992 | 7 May 1993 | British | 104 years |
| James Arthur Brooks | Director | 10 Jan 2000 | 2 Oct 2002 | British | 78 years |
| Jason Alexander Smalley | Director | 31 Jul 2009 | 22 Oct 2016 | British | 57 years |
| John Anthony Robinson | Director | 4 Sept 2000 | 1 Apr 2004 | British | 78 years |
| John Lyndon Hill | Secretary | 25 May 1992 | 20 Jul 1994 | British | - |
| Larry Jose Zea Betancourt | Director | 30 Sept 2011 | 1 Oct 2019 | Venezuelan | 65 years |
| Marco Antonio Moreno Estrada | Director | 18 Mar 2005 | 31 Jul 2009 | Mexican | 71 years |
| Mark Andrew Bevington | Director | 14 Jun 2004 | 7 Feb 2005 | British | 54 years |
| Matthew Paul Jowett | Director | 7 Feb 2005 | 18 Mar 2005 | British | - |
| Michael Francis Egan | Director | 13 Dec 2012 | 5 Mar 2013 | American | 64 years |
| Michael Leslie Collins | Director | 2 Oct 2002 | 23 Mar 2015 | British | 70 years |
| Michael Leslie Collins | Secretary | 4 Sept 2000 | 6 Dec 2012 | British | - |
| Michael Thomas Davies | Director | 26 Mar 1999 | 10 Jan 2000 | British | 79 years |
| Peter Crowley | Director | 1 Feb 1999 | 10 Jan 2000 | Australia | 69 years |
| Peter Henry Gillard | Director | 12 Jun 2007 | 22 May 2009 | British | 74 years |
| Peter John Carr | Director | 25 May 1992 | 1 Jan 1996 | British | 85 years |
| Peter Michael Johnson | Director | 1 May 1996 | 10 Jan 2000 | British | 79 years |
| Philip Bernard Griffin Smith | Secretary | 1 Jul 1999 | 31 May 2000 | British | - |
| Rebecca Juliet Wright | Secretary | 30 Jun 2018 | 25 Jan 2021 | - | - |
| Robert Martin Gourlay | Director | 1 Jun 1994 | 10 Jan 2000 | British | 87 years |
| Roderick Sayers Paul | Director | 31 Oct 1994 | 20 Sept 1998 | British | 91 years |
| Roger Michael Sharp | Director | 25 May 1992 | 10 Jan 2000 | British | 82 years |
| Stephen Bottle | Director | 2 Oct 2002 | 12 Apr 2006 | British | 69 years |
| Stephen John Eastwood | Director | 31 Jul 2000 | 5 Sept 2002 | British | 69 years |
| William Peter Long | Director | 8 May 1995 | 20 Oct 1999 | British | 80 years |