| Adriaan Cornelis Van Der Toorn | Director | 24 Jul 2010 | 17 Dec 2014 | Dutch | 54 years |
| Allen Edwin Norris | Director | 13 Dec 2007 | 25 May 2009 | British | 78 years |
| Allen Edwin Norris | Director | 25 May 2009 | 31 May 2011 | British | 78 years |
| Christine Helen Soden | Director | 29 Sept 1999 | 10 Nov 1999 | British | 68 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 Phillip Bloxham | Director | 31 Mar 1991 | 8 Dec 1997 | British | 78 years |
| Donald Edwin Seymour | Director | 31 Mar 1991 | 24 Apr 1991 | British | 106 years |
| Edmond Differding | Director | 13 Dec 2007 | 25 May 2009 | Luxembourger | 70 years |
| Edmond Differding | Director | 25 May 2009 | 1 Apr 2010 | Luxembourger | 70 years |
| Erik Roelandt | Director | 22 Jun 2005 | 24 Jul 2010 | Belgian | 61 years |
| Gerd Johnscher | Director | 13 Dec 2007 | 25 May 2009 | German | 78 years |
| Goran Albert Torstensson Ando | Director | 16 Apr 2003 | 29 Oct 2004 | Swedish | 76 years |
| Harbinder Singh Bains | Director | 10 May 2005 | 28 Feb 2006 | British | 60 years |
| Henrik Valdemar Klitgaard | Director | 13 Dec 2007 | 25 May 2009 | Danish | 68 years |
| Henrik Valdemar Klitgaard | Director | 25 May 2009 | 31 May 2011 | Danish | 68 years |
| Hocine Sidi-said | Director | 13 Dec 2007 | 25 May 2009 | French | 60 years |
| Iain Gladstone Ross | Director | 27 Jun 1991 | 31 Oct 1995 | British | 71 years |
| Jean-christophe Donck | Director | 13 Dec 2007 | 25 May 2009 | Belgian | 62 years |
| Jean-christophe Donck | Director | 25 May 2009 | 31 May 2011 | Belgian | 62 years |
| John Andrew Duncan Slater | Secretary | 31 Mar 1991 | 29 Oct 2004 | British | - |
| John Bernard Haysom Jackson | Director | 31 Mar 1991 | 1 Oct 1993 | British | 96 years |
| John Edward Berriman | Director | 16 Jan 1995 | 26 Apr 1996 | British | 77 years |
| John Edward Berriman | Director | 31 Mar 1991 | 3 Oct 1994 | British | 77 years |
| John George Huckle | Director | 31 Mar 1991 | 30 Oct 1991 | British | 82 years |
| John Robert Birch | Director | 31 Mar 1991 | 4 Jun 1992 | British | 80 years |
| Lord Lord Phillips Of Ellesmere | Director | 31 Mar 1991 | 1 Oct 1993 | British | 101 years |
| Luc Vermeesch | Director | 13 Dec 2007 | 25 May 2009 | Belgian | 69 years |
| Luc Vermeesch | Director | 25 May 2009 | 4 Apr 2014 | Belgian | 69 years |
| Mark Glyn Hardy | Director | 17 Dec 2004 | 1 Oct 2023 | British | 72 years |
| Mark Glyn Hardy | Secretary | 29 Oct 2004 | 1 Oct 2023 | British | - |
| Martin Francis Wood | Director | 31 Mar 1991 | 4 Jun 1992 | British | 98 years |
| Melanie Georgina Lee | Director | 24 Sept 1998 | 31 Aug 2009 | British | 67 years |
| Michael John Bentley | Director | 4 Jun 1992 | 1 Oct 1993 | British | 92 years |
| Michele De Cannart D'hamale | Director | 22 Jun 2005 | 29 Apr 2011 | Belgian | 74 years |
| Olufunlayo Modupe Oluwa | Director | 1 Jan 2024 | 1 Dec 2024 | British | 57 years |
| Paul Myners | Director | 31 Mar 1991 | 24 Apr 1991 | British | 77 years |
| Peter Geoffrey Nicholls | Director | 31 Jan 2005 | 2 Oct 2009 | British | 76 years |
| Peter John Fellner | Director | 31 Mar 1991 | 16 Apr 2003 | British | 82 years |
| Peter Vance Allen | Director | 27 Feb 1992 | 17 Dec 2004 | British | 69 years |
| Robert Charles Jackson | Director | 29 Sept 1999 | 25 May 2000 | British | 82 years |
| Robert Peter Thian | Director | 24 Apr 1991 | 1 Oct 1993 | British | 82 years |
| Ronald Edward Artus | Director | 31 Mar 1991 | 24 Apr 1991 | British | 94 years |
| Sidney Stewart Siddall | Director | 24 Apr 1991 | 1 Oct 1993 | British | 89 years |
| Stephen Charles Jones | Director | 28 Feb 2006 | 30 Jun 2013 | British | 73 years |
| Stephen Turley | Director | 13 Apr 2017 | 8 Oct 2018 | British | 56 years |
| Ursuala Mary Ney | Director | 31 Oct 2000 | 31 Dec 2001 | British | 73 years |