| Alexander Rupert Van Someren | Director | 27 Sept 2000 | 31 Dec 2007 | British | 61 years |
| Christopher William Hindle | Director | 1 Aug 2023 | 14 Jul 2025 | British | 58 years |
| David Charles Lockwood | Director | 1 Apr 2010 | 1 Jun 2011 | British | 64 years |
| Dean Justin Vincent | Director | 31 Dec 2013 | 10 Apr 2017 | British | 56 years |
| Ewen Angus Mccrorie | Director | 10 Apr 2017 | 1 Aug 2023 | British | 68 years |
| Franck Greverie | Director | 31 Mar 2009 | 1 Jun 2011 | French | 57 years |
| Geoffrey John Finlay | Director | 3 Dec 2007 | 10 Oct 2008 | British | 73 years |
| George Alexander Ralph | Secretary | 24 May 2007 | 10 Oct 2008 | British | - |
| Ian Kenneth Smith | Director | 13 Aug 2002 | 8 Jun 2006 | British | 69 years |
| Ian Kenneth Smith | Secretary | 27 Sept 2000 | 8 Jun 2006 | British | - |
| Ira Zalesin | Director | 2 Jan 2008 | 10 Oct 2008 | American | 71 years |
| James Stuart Urquhart | Director | 28 Sept 2000 | 10 Oct 2008 | British | 69 years |
| John Gordon Ballard | Director | 31 Mar 2009 | 17 Sept 2010 | British | 81 years |
| Kenneth James Prenty | Secretary | 8 Jun 2006 | 14 May 2007 | British | - |
| Lawrence Hammond | Director | 10 Oct 2008 | 1 Apr 2009 | British | 63 years |
| Michael William Peter Seabrook | Director | 10 Oct 2008 | 1 Apr 2009 | British | 60 years |
| Michael William Peter Seabrook | Secretary | 10 Oct 2008 | 3 Feb 2025 | British | - |
| Nicholas Benedict Van Someren | Director | 28 Sept 2000 | 31 Dec 2007 | British | 59 years |
| Ossama Hassanein | Director | 28 Sept 2000 | 12 Dec 2006 | Canadian | 78 years |
| Peter Thomas Batley | Director | 31 Mar 2009 | 1 Apr 2010 | British | 65 years |
| Philip Martin Naybour | Director | 17 Jan 2014 | 10 Apr 2017 | British | 66 years |
| Phillip Simon Jones | Director | 1 Jun 2011 | 31 Mar 2014 | British | 61 years |
| Richard Ian Gourlay | Director | 28 Sept 2000 | 10 Oct 2008 | British | 70 years |
| Robert Charles Hubert Jeens | Director | 12 Dec 2006 | 10 Oct 2008 | British | 73 years |
| Roger John Maggs | Director | 28 Sept 2000 | 16 May 2001 | British | 80 years |
| Ross James Parsell | Director | 31 Mar 2009 | 1 Jun 2011 | British | 63 years |
| Simon Roberts | Director | 1 Apr 2010 | 31 Dec 2013 | British | 69 years |
| Thierry Denis Etienne Gentgen | Director | 31 Mar 2009 | 1 Apr 2010 | French | 60 years |