| Andrew Spurr | Director | 26 Jun 2009 | 31 Dec 2013 | British | 73 years |
| Christopher Hugh Hamill | Secretary | 1 Oct 2016 | 26 Jul 2017 | - | - |
| David Flint | Nominee Director | 23 Dec 1994 | 28 Mar 1995 | British | 71 years |
| David Flint | Nominee Secretary | 23 Dec 1994 | 28 Mar 1995 | British | - |
| David Fraser Mitchell | Director | 28 Apr 2015 | 22 Jun 2016 | British | 53 years |
| Florian Max Marie Andre Debionne | Director | 22 Jun 2016 | 6 Jun 2018 | French | 58 years |
| Frederic Mayoux | Director | 1 Mar 2021 | 1 Oct 2024 | French | 65 years |
| Humphrey Alan Edward Cadoux-hudson | Director | 22 Jun 2016 | 30 Jun 2022 | British | 66 years |
| Ian Dickson | Nominee Director | 23 Dec 1994 | 28 Mar 1995 | British | 76 years |
| Jean Elizabeth Macdonald | Director | 7 Mar 2003 | 19 Jul 2010 | British | 69 years |
| Jean Elizabeth Macdonald | Secretary | 28 Mar 1995 | 19 Jul 2010 | British | - |
| Julia Pyke | Secretary | 26 Jul 2017 | 31 Oct 2019 | - | - |
| Michael Ralph Kirwan | Director | 4 Nov 1996 | 31 May 2002 | British | 85 years |
| Patrick Pruvot | Director | 6 Jun 2018 | 1 Mar 2021 | French | 67 years |
| Peter Thomas Hollins | Director | 16 Apr 1998 | 7 Jun 2001 | British | 79 years |
| Robert Guyler | Director | 18 May 2012 | 28 Apr 2015 | British | 60 years |
| Robert Hawley | Director | 4 Nov 1996 | 30 Jun 1997 | British | 90 years |
| Robert Malcolm Armour | Director | 28 Mar 1995 | 3 Jul 2009 | British | 67 years |
| Robin Campbell Jeffrey | Director | 28 Mar 1995 | 4 Nov 1996 | British | 87 years |
| Robin Campbell Jeffrey | Director | 17 Jun 2001 | 10 Feb 2003 | British | 87 years |
| Simone Rossi | Director | 1 Apr 2011 | 18 May 2012 | Italian | 58 years |
| Stephen Robert Billingham | Director | 3 Oct 2005 | 31 Mar 2009 | British | 68 years |
| Stuart Crooks | Director | 1 Jan 2014 | 22 Jun 2016 | British | 61 years |
| Thomas Andreas Kusterer | Director | 1 Apr 2009 | 29 Mar 2011 | German | 58 years |
| William Alfred Coley | Director | 20 Mar 2005 | 31 Jul 2009 | British | 83 years |