| Andrew Richard Wood | Director | 1 Apr 1995 | 16 Jun 2000 | British | 75 years |
| Brigitte Bouquot | Director | 16 Jun 2000 | 20 Nov 2002 | French | 70 years |
| Christopher William Hindle | Director | 1 Aug 2023 | 14 Jul 2025 | British | 58 years |
| Colin Michael Chandler | Director | 31 Jan 2000 | 2 May 2002 | British | 87 years |
| David Robert Geoffrey Horne | Director | 1 Jan 2003 | 1 Aug 2007 | British | 72 years |
| David Whittaker | Director | 4 Nov 1996 | 16 Jun 2000 | British | 82 years |
| David Whittaker | Secretary | 7 Sept 1992 | 16 Jun 2000 | British | - |
| Ernest Thomas Harrison | Director | 7 Sept 1992 | 31 Jan 2000 | British | 100 years |
| Ewen Angus Mccrorie | Director | 10 Apr 2017 | 1 Aug 2023 | British | 68 years |
| Frances Alison Hexter | Director | 1 Apr 2010 | 10 Apr 2017 | British | 69 years |
| Geoffrey John Suckling | Director | 14 Oct 1994 | 7 Mar 1996 | British | 90 years |
| James Maxwell Kaye | Director | 7 Sept 1992 | 31 Mar 1995 | British | 89 years |
| Jean Yves Bernard Francois Haagen | Director | 21 Aug 2001 | 10 Sept 2004 | French | 62 years |
| John Albert Trubee | Director | 7 Sept 1992 | 29 Apr 1994 | British | 92 years |
| Michael William Peter Seabrook | Secretary | 16 Jun 2000 | 3 Feb 2025 | British | - |
| Nicholas Topazio | Director | 16 Jun 2000 | 31 Oct 2002 | British | 66 years |
| Robert Bartlett | Director | 16 Jun 2000 | 1 Jul 2005 | British | 71 years |
| Simon Roberts | Director | 1 Aug 2007 | 1 Apr 2010 | British | 69 years |
| William Paul Moffatt | Director | 10 Sept 2004 | 31 Dec 2007 | British | 70 years |