| Adam Bradley Daniels | Director | 29 Apr 2022 | 17 Mar 2025 | British | 41 years |
| Chantal Benedicte Forrest | Secretary | 6 Apr 2002 | 31 Jul 2008 | English,french | - |
| Christopher Norman Kemp Tizard | Director | 17 Oct 1991 | 31 Aug 1995 | British | 93 years |
| Christopher Tawney | Director | 1 Oct 2001 | 31 Mar 2007 | British | 69 years |
| David Frank Routs | Director | 17 Oct 1991 | 6 Apr 2002 | British | 82 years |
| David Frank Routs | Secretary | 17 Oct 1991 | 6 Apr 2002 | British | - |
| Eifion Thomas | Director | 31 Mar 1999 | 30 Apr 2002 | British | 83 years |
| Francisco Fernando Fernandez Torres | Director | 1 Jun 2002 | 12 Sept 2003 | Spanish | 77 years |
| Frank Sinclair Thomson | Director | 17 Oct 1991 | 10 Mar 1992 | British | 83 years |
| Frederick Alan Simon Lesser | Director | 11 Sept 2000 | 10 May 2002 | British | 94 years |
| Frederick Louis Le Sene | Director | 17 Oct 1991 | 30 Sept 1991 | British | 94 years |
| Gerhard Hillebrand | Director | 12 Sept 2003 | 31 Dec 2006 | German | 74 years |
| Graham Bernard Lawson | Director | 17 Jul 2000 | 11 Jul 2002 | British | 84 years |
| Howard James Matthewson | Director | 31 Mar 1999 | 21 May 2002 | British | 68 years |
| Ian George Kerr | Director | 17 Oct 1991 | 31 Mar 1999 | British | 85 years |
| Jacques Emsens | Director | 17 Jul 2000 | 30 Apr 2002 | Belgian | 63 years |
| Jean-francois Chene | Director | 1 Oct 1997 | 6 Sept 2000 | French | 72 years |
| John Douglas Carter | Director | 10 Mar 1992 | 21 Apr 1997 | British | 81 years |
| John Willem Van Put | Director | 1 Jan 2015 | 29 Apr 2022 | Dutch | 64 years |
| Michael Ernest Beckett | Director | 11 Sept 2000 | 31 Dec 2006 | British | 90 years |
| Neil Anthony Harrison | Director | 23 May 2006 | 31 May 2007 | British | 76 years |
| Neville Sydney Jones | Director | 17 Oct 1991 | 31 Dec 1997 | British | 87 years |
| Thomas Charles Cutbush | Director | 1 Jan 2007 | 1 Jan 2015 | Australian | 71 years |
| Wilson Dyet Brown | Director | 31 Mar 1999 | 31 May 2006 | British | 79 years |