| Alastair Peter Jollans | Director | 16 Jun 2005 | 29 Oct 2008 | British | 72 years |
| Amanda Louise Knott | Secretary | 26 Jul 2007 | 25 Jul 2013 | British | - |
| Andrew Nigel Bailey | Director | 4 Nov 2005 | 10 Mar 2006 | British | 58 years |
| Ann Claire Blundell | Secretary | 25 Jul 2013 | 20 Feb 2014 | - | - |
| Antoine James Philippe Michel Meyer | Director | 1 Jan 1997 | 30 Jun 2002 | French | 79 years |
| Corina Katherine Ross | Secretary | 6 Sept 2011 | 25 Jul 2013 | British | - |
| David Arthur Lancaster | Secretary | 1 May 1992 | 20 Mar 1995 | British | - |
| David John Wigman | Director | 12 May 1992 | 31 Jan 2003 | British | 80 years |
| Helen Frances Leigh Rogers | Secretary | 14 Jul 2008 | 2 Dec 2011 | British | - |
| Ian Bruce Owen | Director | 1 May 1992 | 7 Apr 1993 | British | 73 years |
| Ian Ritchie | Secretary | 25 Jul 2013 | 20 Feb 2014 | - | - |
| James Douglas Sutherland | Director | 25 Feb 2014 | 20 Oct 2017 | British | 52 years |
| James Richard Sykes | Director | 7 Jul 2004 | 22 Apr 2005 | British | 65 years |
| Jayne Michelle Meacham | Secretary | 26 Jul 2007 | 2 May 2008 | British | - |
| Jeffrey Sissons | Director | 4 Nov 2005 | 23 Aug 2012 | British | 63 years |
| Jonathan Vaughan-williams | Director | 25 Feb 2014 | 28 Apr 2017 | British | 59 years |
| Lee Sydney Tyrer | Director | 12 May 1992 | 12 Sept 2003 | British | 78 years |
| Lily Olisa Holding | Secretary | 21 Aug 2003 | 22 Apr 2005 | British | - |
| Mahmoud Nodjoumi | Director | 12 May 1992 | 7 Jul 2004 | Iranian | 79 years |
| Malcolm Denys Comfort | Secretary | 20 Mar 1995 | 23 Apr 1996 | British | - |
| Marcus Nagel | Director | 22 Mar 2010 | 17 Feb 2012 | German | 61 years |
| Margaret Elizabeth Gibbon | Secretary | 31 May 1999 | 21 Aug 2003 | British | - |
| Mark Arthur Goodman | Director | 28 Sept 2000 | 31 Dec 2006 | British | 66 years |
| Michael Kenneth Murley | Director | 31 Jan 2003 | 7 Jul 2004 | British | 69 years |
| Nigel De Rivaz | Director | 12 May 1992 | 7 Apr 1993 | British | 77 years |
| Nigel Lowe | Secretary | 22 Apr 2005 | 26 Jul 2007 | British | - |
| Paul Andrew Nolan | Director | 21 Aug 2003 | 7 Jul 2004 | Irish | 64 years |
| Robert Andrew Sherman Oliver | Director | 5 May 2006 | 25 Feb 2014 | British | 66 years |
| Robert Frederick Hubbard | Director | 7 Apr 1993 | 31 Jan 1995 | British | 86 years |
| Samantha Jayne Morris | Secretary | 23 Apr 1996 | 31 May 1999 | British | - |
| Stuart Geoffrey Reynolds | Director | 7 Jul 2004 | 29 Sept 2005 | British | 65 years |
| Stuart John Clee | Director | 27 Oct 2008 | 25 Feb 2014 | British | 63 years |
| Thomas Mchardy Naskret | Director | 1 May 1992 | 1 Jan 1997 | British | 74 years |