| Andrew Marc Jones | Director | 11 Sept 2006 | 6 Nov 2009 | British | 57 years |
| Antony David Roscoe | Director | 5 Dec 1991 | 27 Mar 1997 | British | 67 years |
| Benjamin Toby Grose | Director | 13 Jul 2012 | 13 Jul 2012 | British | 56 years |
| Benjamin Toby Grose | Director | 13 Jul 2012 | 2 Oct 2014 | British | 56 years |
| Charles John Middleton | Director | 22 Feb 2016 | 31 Mar 2022 | British | 59 years |
| Christopher Michael John Forshaw | Director | 30 Aug 2006 | 5 Apr 2017 | British | 76 years |
| Christopher Peter Alan Ward | Director | 14 Aug 2000 | 13 Sept 2001 | British | 57 years |
| David Purcell Stewart | Director | 18 Nov 1998 | 29 Aug 2001 | British | 84 years |
| Emanuel Wolfe Davidson | Director | 15 Aug 1991 | 30 Aug 2006 | British | 94 years |
| Gerald Abraham Davidson | Director | 5 Dec 1991 | 31 Dec 1995 | British | 64 years |
| Gerald Abraham Davidson | Director | 13 Sept 2001 | 30 Aug 2006 | British | 64 years |
| Graham Charles Roberts | Director | 30 Aug 2006 | 30 Jun 2011 | British | 67 years |
| James Andrew Scott | Director | 13 Dec 1999 | 13 Sept 2001 | British | 60 years |
| Jean-marc Vandevivere | Director | 13 Jul 2012 | 31 Jan 2016 | French | 48 years |
| Jonathan Winston Rose | Director | 15 Oct 2003 | 30 Aug 2006 | British | 52 years |
| Lucinda Margaret Bell | Director | 11 Sept 2006 | 19 Jan 2018 | British | 61 years |
| Michael John Meadows | Director | 16 Mar 2022 | 5 Mar 2024 | British | 44 years |
| Ndiana Ekpo | Secretary | 30 Apr 2009 | 6 Dec 2016 | Other | - |
| Nigel Mark Webb | Director | 11 Sept 2006 | 30 Jun 2023 | British | 62 years |
| Patrick Ranger | Director | 12 Jan 1998 | 13 Sept 2001 | British | 66 years |
| Paul Laurence Huberman | Director | 15 Aug 1991 | 20 Mar 1998 | British | 64 years |
| Paul Laurence Huberman | Secretary | 15 Aug 1991 | 20 Mar 1998 | British | - |
| Peter Courtenay Clarke | Director | 11 Sept 2006 | 16 Aug 2010 | British | 59 years |
| Peter James Murrell | Director | 18 Mar 2022 | 5 Mar 2024 | British | 41 years |
| Rebecca Jane Scudamore | Secretary | 30 Aug 2006 | 30 Apr 2009 | Other | - |
| Robert Edward Bowden | Director | 30 Aug 2006 | 31 Dec 2007 | British | 83 years |
| Sarah Morrell Barzycki | Director | 11 Sept 2006 | 18 Mar 2022 | British | 67 years |
| Simon Geoffrey Carter | Director | 13 Jul 2012 | 30 Jan 2015 | British | 50 years |
| Stephen Alan Michael Hester | Director | 11 Sept 2006 | 15 Nov 2008 | British | 65 years |
| Stephen Paul Smith | Director | 13 Jul 2012 | 31 Mar 2013 | British | 72 years |
| Stephen Paul Smith | Director | 13 Jul 2012 | 31 Mar 2013 | British | 72 years |
| Swee Ming Chia | Secretary | 20 Mar 1998 | 30 Aug 2006 | British | - |
| Timothy Andrew Roberts | Director | 11 Sept 2006 | 31 Mar 2019 | British | 61 years |
| Virginia Warr | Director | 18 Mar 2022 | 5 Mar 2024 | British | 61 years |