| Adina-lee Rudston Fargher | Director | 21 May 2013 | 10 Feb 2017 | Australian | 46 years |
| Alan Sheppard | Director | 1 Sept 1995 | 27 Aug 1999 | British | 78 years |
| Ana Isabel Infante Gonzalez De La Aleja | Director | 25 May 2022 | 1 Dec 2024 | Spanish | 55 years |
| Bernard David Taylor | Director | 8 May 1992 | 10 Dec 1993 | British | 90 years |
| Bo Kjelgaard Iversen | Director | 1 Nov 2010 | 17 Mar 2016 | Danish | 59 years |
| Bruno Strigini | Director | 13 Jan 2005 | 1 Feb 2006 | French | 64 years |
| Claire Brading | Director | 1 Jan 2021 | 1 Dec 2024 | British | 44 years |
| Dan Coombes | Director | 8 Oct 2018 | 1 Jan 2021 | British | 50 years |
| David John Lees | Director | 8 May 1992 | 10 Dec 1993 | Australian | 78 years |
| Dennis Henry Millard | Director | 30 Mar 1994 | 29 Feb 1996 | American | 76 years |
| Erik Roelandt | Director | 1 Nov 2007 | 24 Jul 2010 | Belgian | 61 years |
| Francis Charles Upchurch | Director | 1 Sept 1997 | 5 Feb 2001 | British | 75 years |
| Frederic Roch Doliveux | Director | 13 Jan 2005 | 12 May 2005 | French | 69 years |
| Garry Watts | Director | 29 Feb 1996 | 30 Sept 2000 | British | 69 years |
| George David Mabon | Director | 1 Nov 1992 | 31 Mar 1994 | British | 77 years |
| Goran Albert Torstensson Ando | Director | 16 Apr 2003 | 29 Oct 2004 | Swedish | 76 years |
| Greg Duncan | Director | 30 Nov 2007 | 30 Apr 2009 | Us Citizen | 60 years |
| Hannah Victoria Blanco | Director | 16 Sept 2014 | 25 Sept 2015 | British | 45 years |
| Harbinder Singh Bains | Director | 13 Jan 2005 | 1 Feb 2006 | British | 60 years |
| Ilaria Villa | Director | 1 Dec 2019 | 20 May 2022 | Italian | 51 years |
| Ingelise Saunders | Director | 23 Jul 2002 | 14 Sept 2004 | Danish | 76 years |
| Jean-christophe Pierre Tellier | Director | 2 Apr 2012 | 3 Nov 2014 | French | 66 years |
| Jean-luc Moreau | Director | 3 Nov 2014 | 30 Apr 2015 | French | 65 years |
| John Andrew Duncan Slater | Secretary | 31 Jan 2001 | 29 Oct 2004 | British | - |
| John Ferguson | Director | 8 May 1992 | 6 Apr 2001 | British | 70 years |
| John Murphy | Secretary | 25 Jul 1996 | 31 Jan 2001 | British | - |
| Malcolm Edwin Bates | Director | 8 May 1992 | 31 May 2000 | British | 77 years |
| Mark Daniel Mcdade | Director | 30 Apr 2009 | 2 Apr 2012 | American | 70 years |
| Mark Glyn Hardy | Secretary | 8 May 1992 | 25 Jul 1996 | British | - |
| Mark Glyn Hardy | Director | 25 Jul 1996 | 1 Oct 2023 | British | 72 years |
| Mark Glyn Hardy | Secretary | 29 Oct 2004 | 1 Oct 2023 | British | - |
| Matthew John Norton Speers | Director | 1 Mar 2008 | 31 Dec 2012 | British | 67 years |
| Michael John Harvey | Director | 8 May 1992 | 31 Jan 2000 | British | 75 years |
| Michael Young | Director | 27 Jun 1995 | 8 Sept 2000 | British | 86 years |
| Michel Lurquin | Director | 1 Oct 2005 | 31 Dec 2008 | Belgian | 81 years |
| Michele De Cannart D' Hamale | Director | 1 Jan 2008 | 1 Jul 2011 | Belgian | 74 years |
| Mohammed Nazir Khoso Baluch | Director | 19 Apr 2010 | 12 Jan 2016 | British | 67 years |
| Olufunlayo Modupe Oluwa | Director | 1 Jan 2024 | 1 Dec 2024 | British | 57 years |
| Pamela Mary Lewis | Director | 9 May 1992 | 10 Dec 1993 | British | 71 years |
| Peter Geoffrey Nicholls | Director | 31 Jan 2005 | 2 Oct 2009 | British | 76 years |
| Peter John Cozens | Director | 28 Sept 1994 | 31 Jul 2000 | British | 74 years |
| Peter John Fellner | Director | 31 Oct 2000 | 16 Apr 2003 | British | 82 years |
| Peter Vance Allen | Director | 31 Oct 2000 | 17 Dec 2004 | British | 69 years |
| Philippe Waty | Director | 1 Jan 2008 | 30 Apr 2011 | Belgian | 62 years |
| Ralph Stephen Harris | Director | 8 May 1992 | 10 Dec 1993 | British | 83 years |
| Ralph Stephen Harris | Director | 28 Sept 1994 | 27 Apr 1995 | British | 83 years |
| Richard Michael Mchale | Director | 4 Dec 2003 | 1 Mar 2008 | British | 61 years |
| Richard Michael Mchale | Director | 19 May 2008 | 30 Apr 2009 | British | 61 years |
| Roger John Langdon Turner | Director | 8 May 1992 | 30 Nov 1992 | British | 77 years |
| Roland John Lewis Bufton | Director | 8 May 1992 | 6 Jul 1998 | British | 77 years |
| Simon Christopher Cartmell | Director | 31 Oct 2000 | 28 Jun 2002 | British | 65 years |
| Simon Looman | Director | 13 Jan 2005 | 31 Dec 2008 | Dutch | 78 years |
| Stephan Roeder | Director | 30 Nov 2007 | 1 Sept 2008 | German | 65 years |
| Stephen Arnold | Director | 8 Apr 2013 | 6 Apr 2015 | British | 56 years |
| Stephen Charles Jones | Director | 1 Feb 2006 | 30 Jun 2013 | British | 73 years |
| Stephen John Redrup | Director | 4 Jul 1994 | 29 Feb 2000 | British | 73 years |
| Stephen Turley | Director | 2 Nov 2015 | 8 Oct 2018 | British | 56 years |
| Vincent Damien | Director | 1 Jan 2006 | 31 Dec 2009 | Belgian | 71 years |
| William Bogie | Director | 1 Apr 1993 | 16 Mar 2000 | British | 81 years |
| William Robinson | Director | 12 May 2005 | 12 Dec 2007 | British | 77 years |
| William Wilson Gerard | Director | 8 May 1992 | 10 Dec 1993 | British | 92 years |
| Willy Constant Cnops | Director | 12 Jan 2016 | 1 Dec 2019 | Belgian | 64 years |