| Alan Joseph Korn | Director | 1 Apr 1993 | 30 Nov 2003 | British | 88 years |
| Allyson Mary Teresa Ablett | Secretary | 5 Aug 2005 | 31 Dec 2008 | British | - |
| Anoop Kang | Director | 7 Jan 2016 | 21 Dec 2016 | British | 52 years |
| Christopher Haddon Heath | Director | 24 Aug 1994 | 1 Apr 2001 | British | 73 years |
| Christopher James Wallace | Director | 30 Apr 1992 | 1 Apr 2001 | British | 76 years |
| David Bryan Elsey | Secretary | 30 Apr 1992 | 1 Apr 2001 | British | - |
| David Errol Neale | Director | 30 Apr 1992 | 26 Nov 1997 | British | 89 years |
| David Neville Benson | Director | 8 Jul 2013 | 9 Oct 2015 | British | 56 years |
| David William Edmund Sterry | Director | 30 Nov 2003 | 7 Jul 2008 | British | 78 years |
| Deborah Pamela Hamilton | Secretary | 8 Jul 2013 | 22 Sept 2014 | - | - |
| Donald William Macdiarmid | Director | 6 Sept 2012 | 8 Jul 2013 | British | 65 years |
| Haydn Jonathan Mursell | Director | 8 Jul 2013 | 28 Apr 2015 | British | 55 years |
| Hugh Edward Earle Raven | Director | 8 Jul 2013 | 28 Apr 2015 | British | 55 years |
| Ivan Charles Allam Green | Director | 30 Apr 1992 | 1 Apr 2001 | British | 84 years |
| James Nigel Holmes | Director | 30 Apr 1992 | 1 Apr 1993 | British | 98 years |
| Mark Antony Hazlewood | Director | 13 Mar 2012 | 8 Jul 2013 | British | 60 years |
| Matthew Armitage | Director | 28 Apr 2015 | 16 Jul 2015 | British | 54 years |
| Matthew Armitage | Secretary | 12 Dec 2014 | 16 Jul 2015 | - | - |
| Matthew Stevens | Director | 9 Dec 2009 | 13 Mar 2012 | British | 57 years |
| Michael Edward Dunn | Director | 5 Aug 2005 | 8 Jan 2010 | British | 58 years |
| Philip Windover Fellowes-prynne | Director | 14 Apr 2008 | 6 Sept 2012 | British | 64 years |
| Robert Ernest Patrick Browne | Director | 1 Apr 2001 | 5 Aug 2005 | British | 84 years |
| Robert Ernest Patrick Browne | Secretary | 1 Apr 2001 | 5 Aug 2005 | British | - |
| Simon John Howell | Secretary | 1 Jan 2009 | 8 Jul 2013 | British | - |