| Alexander Michael Comba | Director | 22 Oct 2008 | 22 Dec 2014 | British | 73 years |
| Andrew Robert Johnson | Secretary | 11 Jun 1991 | 1 Jun 2001 | British | - |
| Anthony Oliver Bickerstaff | Director | 18 Jul 2001 | 9 Mar 2006 | British | 62 years |
| Brian William Hendry | Director | 11 Jun 1991 | 5 Apr 2000 | British | 82 years |
| Bruno Michel Dupety | Director | 10 Nov 2014 | 2 Aug 2019 | French | 70 years |
| Christopher Carl Brennan | Director | 16 Dec 2020 | 21 Jul 2025 | British | 57 years |
| Crispin Alexander Rowell | Director | 31 Oct 2003 | 19 Dec 2006 | British | 68 years |
| Crispin Alexander Rowell | Director | 19 Dec 2006 | 2 Feb 2007 | British | 68 years |
| David Anthony Langford Joyce | Director | 17 Feb 2010 | 27 Sept 2017 | British | 78 years |
| David Douglas Percival White | Director | 18 Nov 1996 | 18 Jul 2001 | British | 76 years |
| Garry Keith Crabtree | Director | 17 Feb 2010 | 31 Mar 2011 | British | 74 years |
| George Henry Restall | Director | 19 Dec 2006 | 22 Oct 2008 | British | 56 years |
| Gilles Bruno Marie Godard | Director | 24 Aug 2020 | 30 Sept 2022 | French | 58 years |
| Ivan George Norris | Director | 21 May 2012 | 15 Dec 2020 | British | 66 years |
| Jean-pierre Bonnet | Secretary | 22 Dec 2014 | 7 Jan 2019 | British | - |
| Jerome Maurice Stubler | Director | 20 Aug 2019 | 24 Aug 2020 | French | 63 years |
| John Gower Bevan | Director | 11 Jun 1991 | 31 Dec 1991 | British | 95 years |
| John Oliver Mark Stanion | Director | 17 Feb 2010 | 29 Sept 2014 | British | 74 years |
| Michael Andrew Lonnon | Secretary | 1 Jun 2001 | 9 Sept 2008 | British | - |
| Paul Tuplin | Director | 17 Feb 2010 | 3 Oct 2014 | British | 71 years |
| Raymond Edward Brian Shine | Director | 5 Apr 2000 | 31 Oct 2003 | British | 80 years |
| Ronald Walter Chapman | Director | 11 Jun 1991 | 31 Dec 1992 | British | 88 years |
| Ruth Elizabeth Tilbrook | Director | 22 Oct 2008 | 12 Nov 2014 | British | 58 years |
| Timothy Peach | Director | 9 Mar 2006 | 31 Oct 2008 | British | 68 years |
| Walter Hogbin | Director | 11 Jun 1991 | 18 Nov 1996 | British | 89 years |