| Adam Maxwell Jones | Director | 25 Mar 2019 | 31 Aug 2024 | British | 57 years |
| Alan Stuart Lewis | Director | 7 Feb 2002 | 1 Apr 2008 | British | 74 years |
| Alastair Ronald Gibbons | Director | 7 Feb 2002 | 1 Jan 2014 | British | 67 years |
| Anthony Patrick Halligan | Director | 2 Apr 2001 | 7 Feb 2002 | British | 64 years |
| Barry Lawson | Secretary | 24 Mar 2000 | 31 Dec 2008 | British | - |
| Benoit Bassi | Director | 20 Mar 2002 | 6 Apr 2017 | French | 70 years |
| Charles Stuart John Barter | Director | 24 Nov 2008 | 10 Dec 2021 | English | 64 years |
| Christopher Conor Mccann | Director | 14 Mar 1992 | 29 Jun 2000 | British | 79 years |
| Christopher David Gairdner Bell | Director | 1 Jan 2014 | 6 Apr 2017 | British | 53 years |
| Christopher Graham Oldroyd | Director | 7 Feb 2002 | 23 Jan 2013 | British | 65 years |
| Christopher John Busby | Director | 1 Apr 2008 | 6 Apr 2017 | British | 54 years |
| David Marsh Hankin | Secretary | 17 Feb 2009 | 26 Jan 2010 | British | - |
| David Robert Shaw | Director | 14 Mar 1992 | 1 Apr 2008 | British | 78 years |
| Denis François Villafranca | Director | 6 Oct 2015 | 6 Apr 2017 | French | 54 years |
| Edward Garton Woods | Director | 26 Jul 2016 | 13 Feb 2024 | British | 50 years |
| Emma Judith Sophia Watford | Director | 26 Jul 2016 | 6 Apr 2017 | British | 49 years |
| Frederic Pescatori | Director | 3 Jan 2012 | 6 Apr 2017 | French | 54 years |
| Glyn Parry Jones | Director | 28 Apr 1997 | 5 May 1998 | British | 74 years |
| Graham Dewhirst | Director | 14 Mar 1992 | 28 Jun 2000 | British | 75 years |
| Graham Dewhirst | Director | 7 Feb 2002 | 31 Dec 2006 | British | 75 years |
| Guido Belli | Director | 20 Mar 2002 | 1 Apr 2008 | Italian | 71 years |
| Guy Patrick Weldon | Director | 10 Sept 2003 | 13 Feb 2024 | British | 59 years |
| Hamish Thomas Grant | Director | 3 Jan 2012 | 6 Apr 2017 | British | 53 years |
| Hector Perez | Director | 6 Oct 2015 | 6 Apr 2017 | Spanish | 52 years |
| Hugh Anthony Shaw | Director | 28 Apr 1995 | 14 Feb 2000 | British | 84 years |
| Iain Samuel Robertson | Director | 14 Mar 1992 | 31 Mar 1992 | British | 81 years |
| James Geoffrey Littler | Director | 14 Mar 1992 | 4 Aug 1992 | British | 96 years |
| James Graham Murray | Director | 7 Feb 2002 | 6 Apr 2017 | British | 67 years |
| Jamie Richard Wyatt | Director | 3 Jan 2012 | 6 Apr 2017 | British | 55 years |
| Jan Fredrik Mikael Lovgren | Director | 1 Jul 2008 | 25 Jan 2013 | Swedish | 65 years |
| Jason Scott Mcgibbon | Director | 3 Jan 2012 | 6 Apr 2017 | British | 54 years |
| John Joseph Rogerson | Director | 5 May 1998 | 23 Dec 1999 | British | 73 years |
| John Michael Davison | Director | 1 Apr 2008 | 2 Dec 2009 | British | 60 years |
| John William Drury | Director | 14 Mar 1992 | 10 Jul 1992 | Australian | 74 years |
| John William Mckenzie Barber | Director | 24 Apr 2007 | 6 Apr 2017 | American | 67 years |
| Jonathan Zhou | Director | 22 Jun 2015 | 6 Apr 2017 | Chinese | 53 years |
| Jose Maria Maldonado | Director | 20 Mar 2002 | 6 Apr 2017 | Spanish | 68 years |
| Juan Lopez Quesada | Director | 20 Mar 2002 | 31 Dec 2007 | Spanish | 70 years |
| Keith Howard Churchman | Director | 28 Nov 1996 | 31 Jan 2002 | British | 68 years |
| Kevin Paul Reynolds | Director | 7 Feb 2002 | 23 Jan 2013 | British | 67 years |
| Lars Hakan Johansson | Director | 1 Jan 2011 | 20 Feb 2015 | Sweden | 57 years |
| Lucio Ranaudo | Director | 1 Apr 2008 | 18 Oct 2011 | Italian | 62 years |
| Malcolm Ian Cameron | Director | 28 Apr 1997 | 14 Feb 2000 | British | 85 years |
| Marc Zügel | Director | 22 Jun 2015 | 6 Apr 2017 | German | 58 years |
| Mark Gregory Wordsworth | Director | 7 Feb 2002 | 31 Jul 2004 | British | 67 years |
| Mark John Harford | Director | 7 Feb 2002 | 30 Jun 2005 | British | 62 years |
| Martin James Dunn | Director | 1 Jan 2011 | 6 Apr 2017 | Irish | 55 years |
| Michael Norman Black | Director | 1 Jan 2005 | 6 Apr 2017 | English | 58 years |
| Michael Robert Davy | Director | 10 Sept 2003 | 6 Apr 2017 | British | 65 years |
| Patrick Adam Charles Fox | Director | 1 Apr 2008 | 5 May 2015 | British | 68 years |
| Patrick Kevin Jennings | Director | 14 Mar 1992 | 16 Mar 1995 | British | 81 years |
| Paul Michael Whitney | Director | 14 Mar 1995 | 31 Dec 1996 | British | 78 years |
| Paul Myners | Director | 3 Jul 1996 | 14 Feb 2000 | British | 78 years |
| Paul Richard Gunner | Director | 12 Apr 2017 | 10 Mar 2022 | British | 53 years |
| Rachel Clare Thompson | Secretary | 26 Jan 2010 | 5 Oct 2020 | British | - |
| Robert Patrick Moores | Director | 10 Sept 2003 | 5 May 2015 | British | 64 years |
| Roderick Alistair Selkirk | Director | 2 Oct 2009 | 5 May 2015 | British | 69 years |
| Roger William Byatt | Director | 25 Jan 1993 | 31 May 1994 | British | 86 years |
| Ruth Nicholson | Secretary | 27 Oct 1997 | 24 Mar 2000 | British | - |
| Sally Elizabeth Lewis | Secretary | 14 Mar 1992 | 27 Oct 1997 | British | - |
| Sidney Milne Donald | Director | 14 Mar 1992 | 30 Jun 1993 | British | 84 years |
| Stephen Nathaniel Green | Director | 2 Oct 2009 | 5 May 2015 | British | 63 years |
| Uwe Rolf Kolb | Director | 27 Jun 2006 | 23 Jan 2013 | German | 69 years |
| Valerie Genevieve Texier | Director | 1 Jan 2005 | 11 Oct 2011 | French | 60 years |
| Vincent Briancon | Director | 1 Apr 2008 | 11 Oct 2011 | French | 54 years |
| Vincent Mitchell Lovell Gwilliam | Director | 7 Feb 2002 | 5 May 2015 | British | 67 years |
| Vincent-gael Baudet | Director | 14 Sept 2015 | 6 Apr 2017 | French | 51 years |
| William Hoan Khai Tan | Director | 24 Apr 2007 | 5 May 2015 | Dutch | 63 years |
| William Nicholas Jackson | Director | 2 Apr 2001 | 6 Apr 2017 | British | 63 years |
| William Simon Paul | Director | 3 Jan 2012 | 6 Apr 2017 | British | 53 years |
| Wolfgang Lenoir | Director | 20 Mar 2002 | 1 Oct 2004 | Germany | 82 years |
| Xavier Jean Robert | Director | 1 Apr 2008 | 6 Apr 2017 | French | 55 years |