| Andrew Marc Jones | Director | 14 Jul 2006 | 6 Nov 2009 | British | 58 years |
| Anthony Braine | Secretary | 10 Apr 1995 | 31 Jul 2014 | British | - |
| Benjamin Toby Grose | Director | 13 Jul 2012 | 2 Oct 2014 | British | 57 years |
| Christopher Michael John Forshaw | Director | 12 May 1995 | 5 Apr 2017 | British | 77 years |
| Cyril Metliss | Director | 24 May 1995 | 14 Jul 2006 | British | 103 years |
| Damian Mark Alan Wisniewski | Secretary | 31 Dec 1991 | 20 Jul 1992 | British | - |
| David Charles Berry | Director | 10 Apr 1995 | 10 Oct 1997 | British | 89 years |
| David John Camp | Director | 3 Dec 1991 | 10 Apr 1995 | British | 69 years |
| Deborah Ann Franks | Secretary | 20 Jul 1992 | 2 Dec 1994 | British | - |
| Graham Charles Roberts | Director | 26 Feb 2002 | 30 Jun 2011 | British | 68 years |
| James Christopher Eric Elworthy | Secretary | 3 Dec 1991 | 31 Dec 1991 | British | - |
| Jean-marc Vandevivere | Director | 13 Jul 2012 | 31 Jan 2016 | French | 49 years |
| Lucinda Margaret Bell | Director | 14 Jul 2006 | 19 Jan 2018 | British | 62 years |
| Milton Anthony Fernandes | Secretary | 2 Dec 1994 | 10 Apr 1995 | British | - |
| Nicholas Simon Jonathan Ritblat | Director | 10 Apr 1995 | 10 Oct 1997 | British | 65 years |
| Nigel David Wilson | Director | 3 Dec 1991 | 31 Jan 1992 | British | 70 years |
| Nigel Mark Webb | Director | 14 Jul 2006 | 26 Apr 2018 | British | 63 years |
| Peter Courtenay Clarke | Director | 14 Jul 2006 | 16 Aug 2010 | British | 60 years |
| Peter Kershaw | Director | 3 Dec 1991 | 30 Oct 1992 | British | 73 years |
| Peter William Rogers | Director | 3 Dec 1991 | 10 Apr 1995 | British | 80 years |
| Robert Edward Bowden | Director | 26 Feb 2002 | 31 Dec 2007 | British | 84 years |
| Sarah Morrell Barzycki | Director | 14 Jul 2006 | 30 Mar 2018 | British | 68 years |
| Simon Geoffrey Carter | Director | 13 Jul 2012 | 30 Jan 2015 | British | 51 years |
| Stephen Paul Smith | Director | 13 Jul 2012 | 31 Mar 2013 | British | 73 years |
| Timothy Andrew Roberts | Director | 14 Jul 2006 | 26 Apr 2018 | British | 62 years |
| Victoria Margaret Penrice | Secretary | 1 Aug 2014 | 29 Apr 2015 | - | - |