| Andrew Charles Homer | Director | 1 Aug 1999 | 16 Nov 2001 | British | 73 years |
| Bertrand Poupart-lafarge | Director | 30 Sept 2013 | 31 Dec 2018 | French | 58 years |
| Caroline Anne Riddy | Secretary | 16 Jun 2020 | 19 Jun 2024 | - | - |
| Caroline Mary Burton | Director | 31 May 1991 | 31 Jul 1999 | British | 76 years |
| Christopher Graham Bobby | Director | 1 Jun 2018 | 31 Dec 2019 | British | 60 years |
| Clifford James Oakley | Director | 19 Nov 2001 | 31 Mar 2006 | British | 82 years |
| David Winton Watt Torrance | Director | 22 Feb 2001 | 19 Nov 2001 | British | 76 years |
| Gregory Mark Wood | Director | 1 Jul 1999 | 21 Feb 2001 | British | 73 years |
| Ian David Lea Richardson | Director | 26 Mar 2004 | 31 Dec 2007 | British | 81 years |
| Ian David Lea Richardson | Secretary | 31 Oct 1999 | 13 Sept 2004 | British | - |
| Ian Robinson | Director | 1 Jan 2008 | 12 Jul 2010 | British | 57 years |
| James Morley | Director | 31 May 1991 | 30 Jun 1999 | United Kingdom | 77 years |
| James Thomas Mcdonough | Director | 31 May 1991 | 31 May 1995 | British | 93 years |
| Jean Paul Dominique Louis Drouffe | Director | 24 Jul 2008 | 31 Aug 2013 | French | 51 years |
| Jeremy Peter Small | Secretary | 13 Sept 2004 | 16 Jun 2020 | British | - |
| John Martin Redhouse Evans | Secretary | 31 May 1991 | 31 May 1995 | British | - |
| John Reginald William Clayton | Secretary | 31 May 1995 | 31 Oct 1999 | British | - |
| John Sinclair | Director | 31 May 1991 | 4 Feb 1999 | British | 78 years |
| John Vernon Harry Robins | Director | 1 Jul 1994 | 30 Jun 1999 | British | 87 years |
| Julian Victor Frow Roberts | Director | 1 Aug 1999 | 31 Jul 2000 | British | 69 years |
| Laurent Michel Robert Matras | Director | 18 Sept 2006 | 29 Dec 2007 | French | 57 years |
| Patrick Charles Regan | Director | 12 Aug 2003 | 9 Feb 2004 | British | 60 years |
| Paul James Evans | Director | 19 Nov 2001 | 12 Aug 2003 | British | 61 years |
| Peter Edward Owen | Director | 4 Feb 1999 | 5 Nov 1999 | British | 80 years |
| Philippe Louis Herbert Maso Y Guell Rivet | Director | 26 Mar 2004 | 8 Nov 2010 | French | 60 years |
| Raymond Francis Pierce | Director | 4 Sept 1997 | 30 Jun 1999 | British | 80 years |
| Robert Charles William Organ | Director | 30 Sept 2013 | 20 Apr 2015 | British | 57 years |
| Sarah Amy O'reilly | Secretary | 19 Jun 2024 | 30 Apr 2025 | - | - |
| Sidney Arthur Hopkins | Director | 31 May 1991 | 30 Jun 1994 | British | 94 years |
| Waseem Ullah Malik | Director | 8 Nov 2010 | 31 Mar 2018 | British | 50 years |
| Yves Masson | Director | 11 Oct 2012 | 30 Sept 2013 | French | 64 years |