| Alan Ingham Bottomley | Director | 2 Jun 1997 | 31 Mar 2003 | British | 95 years |
| Andrew Guy Tyrie | Director | 23 Jul 2002 | 29 Jul 2008 | British | 69 years |
| Barry Aubrey Anysz | Director | 11 Apr 1992 | 6 May 2005 | British | 77 years |
| Bernard Kantor | Director | 6 May 2005 | 1 Aug 2019 | Irish | 77 years |
| Christopher George Clarke | Director | 28 Oct 1999 | 31 Mar 2014 | British | 82 years |
| Christopher John Bates Broadbent | Director | 11 Apr 1992 | 23 Sept 1996 | British | 71 years |
| David Anderson | Director | 11 Apr 1992 | 8 Sept 1993 | British | 71 years |
| David John Hillersdon Bulteel | Director | 16 Oct 2007 | 30 Jun 2018 | British | 71 years |
| George Charles Nicholas Lane Fox | Director | 24 May 2002 | 16 Oct 2007 | English | 63 years |
| Henry Claude Elstone | Director | 11 Apr 1992 | 1 Apr 1998 | British | 83 years |
| Iain William Hooley | Secretary | 20 Jul 2010 | 28 Sept 2010 | - | - |
| Ian Maxwell-scott | Director | 6 May 2005 | 31 Mar 2018 | British | 81 years |
| Isla Margaret Smith | Director | 4 Nov 2008 | 25 Jun 2010 | British | 74 years |
| Jonathan David Seal | Director | 16 Oct 2007 | 29 May 2013 | British | 66 years |
| Jonathan Peter Wragg | Director | 1 Dec 2000 | 31 Mar 2020 | British | 59 years |
| Jonathan Peter Wragg | Secretary | 26 May 1999 | 27 Mar 2007 | British | - |
| Judith Edna Price | Director | 1 Dec 2009 | 1 Aug 2019 | British | 69 years |
| Kathy Cong | Secretary | 28 Sept 2010 | 5 Jul 2013 | - | - |
| Katrina Kerr | Director | 21 Nov 2002 | 6 May 2005 | British | 71 years |
| Malcolm Henry Weston Wells | Director | 11 Apr 1992 | 5 Apr 1995 | British | 99 years |
| Michael Hamer Burns | Director | 5 Jul 1995 | 31 Mar 2007 | British | 79 years |
| Michael John Dickinson | Director | 11 Apr 1992 | 30 Nov 2000 | British | 77 years |
| Michael John Dickinson | Secretary | 11 Apr 1992 | 26 May 1999 | British | - |
| Michael Robert Anthony Haan | Director | 14 Nov 2005 | 25 Jun 2010 | British | 82 years |
| Nicholas Curwen Williams | Director | 11 Apr 1992 | 6 May 2005 | British | 86 years |
| Nicholas Wilfrid Bagshawe | Director | 6 May 2005 | 31 Mar 2007 | British | 81 years |
| Paula Mary Watts | Secretary | 27 Mar 2007 | 20 Jul 2010 | British | - |
| Peter Henry Arthur Stanley | Director | 5 Apr 1995 | 23 Mar 2000 | British | 93 years |
| Robert Anthony Allen | Director | 24 May 2002 | 6 May 2005 | British | 67 years |
| Robert Charles Lister | Director | 4 Nov 2008 | 8 May 2017 | British | 66 years |
| Simon George Kaye | Director | 1 Dec 2009 | 29 May 2013 | British | 65 years |
| Stephen Koseff | Director | 6 May 2005 | 1 Aug 2019 | South African, | 75 years |
| Stephen Maclaurin Elliott | Director | 6 May 2005 | 1 Aug 2019 | South African | 72 years |
| Timothy Charles Jason Wood | Director | 11 Apr 1992 | 25 Sept 2003 | British | 84 years |
| Tomas Haydn Street | Director | 1 Dec 2009 | 1 Aug 2019 | British | 62 years |