| Andrea Margaret Thomas | Secretary | 1 Sept 1997 | 1 May 2002 | Other | - |
| Andrea Margaret Thomas | Secretary | 21 Jul 2008 | 23 Mar 2009 | Other | - |
| Anna Marie Floyer-lea | Director | 11 Jan 2019 | 12 Aug 2021 | British | 50 years |
| Anna Marie Floyer-lea | Director | 10 Jan 2023 | 12 Mar 2025 | British | 50 years |
| Basil Richard Ryland Butler | Director | 25 Dec 1991 | 31 Jan 1998 | British | 96 years |
| Brian Peevor | Secretary | 1 Apr 1994 | 31 Aug 1997 | British | - |
| Byron Elmer Grote | Director | 8 Jul 1998 | 1 Mar 1999 | British And Us Citiz | 78 years |
| Christopher Barton Hunt | Director | 1 Mar 2006 | 31 Jan 2008 | American,british | 63 years |
| Christopher John Hedley | Director | 1 Sept 1997 | 1 May 2000 | British | 77 years |
| Christopher Kuangcheng Gerald Eng | Secretary | 23 Mar 2009 | 30 Jun 2010 | Other | - |
| Craig William Coburn | Director | 1 Mar 2006 | 1 Nov 2016 | American | 62 years |
| David Campbell | Director | 1 Dec 2003 | 1 Mar 2006 | British | 58 years |
| David Christopher Allen | Director | 1 Jan 2000 | 1 May 2002 | British | 72 years |
| David Geoffrey Philip Eyton | Director | 17 Jul 2014 | 16 Mar 2022 | British | 65 years |
| David Ian Gilmour | Director | 7 Nov 2016 | 1 Jul 2020 | British | 66 years |
| David William John Grant | Director | 1 Sept 2004 | 2 Oct 2007 | British | 74 years |
| Dawn Noel | Secretary | 1 Feb 2006 | 3 Nov 2006 | British | - |
| Dipesh Jayantilal Shah | Director | 25 Dec 1991 | 31 Aug 1997 | British | 73 years |
| Dominic Emery | Director | 31 Jan 2008 | 17 Jul 2014 | British | 63 years |
| Dominique Martin Caroline Verstappen | Director | 1 Sept 2005 | 1 Mar 2006 | Dutch | 59 years |
| George Leland Edwards | Director | 1 Mar 2005 | 1 Mar 2006 | Us Citizen | 69 years |
| Giulia Chierchia | Director | 4 Apr 2022 | 31 May 2025 | Belgian | 48 years |
| Graeme David Albert Brebner | Director | 1 May 2003 | 1 Sept 2004 | British | 74 years |
| Graham Garfield Baxter | Director | 1 May 2000 | 28 Feb 2003 | British | 75 years |
| Janet Elvidge | Secretary | 1 Aug 2004 | 1 Feb 2006 | Other | - |
| Janet Elvidge | Secretary | 3 Nov 2006 | 21 Jul 2008 | Other | - |
| Jens Stefan Umehag | Director | 15 Oct 2015 | 11 Jan 2019 | Swedish | 52 years |
| Johannes Slaghekke | Director | 1 Mar 2006 | 30 Sept 2009 | Dutch | 61 years |
| John Ivan George Cadogan | Director | 25 Dec 1991 | 30 Sept 1992 | British | 96 years |
| John Stewart Morgan | Director | 1 Aug 2010 | 28 Feb 2011 | British | 71 years |
| John William Downer | Director | 1 Jul 2003 | 1 Mar 2005 | British | 77 years |
| Julian John Watts | Secretary | 25 Dec 1991 | 31 Mar 1994 | New Zealand | - |
| Justin Charles Maclennan Adams | Director | 28 Feb 2011 | 27 Feb 2012 | British | 55 years |
| Katrina Ann Landis | Director | 4 Dec 2007 | 1 Aug 2010 | United States | 67 years |
| Lawrence Coleman | Director | 20 Aug 2021 | 1 Jan 2023 | British | 46 years |
| Nicholas Charles Coleman | Director | 1 May 2002 | 1 May 2003 | British | 74 years |
| Philip Graham New | Director | 1 Oct 2009 | 17 Jul 2014 | British | 64 years |
| Richard John Evans | Director | 25 Dec 1991 | 30 Apr 1999 | British | 85 years |
| Richard Lovell Feil | Director | 1 Aug 2003 | 1 Dec 2003 | British | 62 years |
| Robert David Mutchell | Director | 17 Jul 2014 | 15 Oct 2015 | British | 52 years |
| Roderick Guy Mason | Director | 27 Feb 2012 | 17 Jul 2014 | British | 62 years |
| Roy Leslie Tooley | Secretary | 1 May 2002 | 1 Aug 2004 | British | - |
| Samantha Elizabeth Skerry | Director | 3 Feb 2021 | 17 Jan 2023 | British | 51 years |
| Stephen David Cook | Director | 1 Jul 2020 | 19 Jan 2021 | British | 53 years |
| Stephen Frye Gates | Director | 1 Mar 1999 | 1 Jan 2000 | American | 80 years |
| Stephen Westwell | Director | 1 Dec 2003 | 1 Sept 2007 | British | 68 years |
| Stuart Patrick Brannigan | Director | 1 Jul 2003 | 1 Dec 2003 | British | 65 years |
| Yasin Stanley Ali | Secretary | 19 Feb 2001 | 30 Jun 2010 | - | - |
