| Alexander Roentgen | Director | 16 May 2005 | 30 Apr 2008 | German | 68 years |
| Andrew Christopher Bolter | Director | 3 Sept 2012 | 5 Apr 2013 | British | 56 years |
| Angela Claire Walker | Director | 1 Oct 2002 | 5 Nov 2007 | British | 64 years |
| Charles Law | Director | 4 Apr 2013 | 5 Dec 2016 | French | 62 years |
| Charles Novotny | Director | 15 Nov 1992 | 30 Jun 1999 | British | 88 years |
| Clive Cadwgan James | Director | 31 Dec 2000 | 30 Apr 2009 | British | 78 years |
| Cyrille Ragoucy | Director | 4 Apr 2013 | 19 Jan 2016 | French | 70 years |
| Daniel Timothy Creedon | Director | 30 Oct 2015 | 11 Dec 2017 | Irish | 61 years |
| David Baxter | Director | 1 Jan 2004 | 22 Apr 2004 | British | 74 years |
| David Blount | Director | 30 Jul 1999 | 31 Dec 2003 | British | 79 years |
| David Connal Cather | Director | 31 Dec 2000 | 30 Sept 2006 | British | 67 years |
| David John Glenn | Director | 7 Nov 2000 | 11 Nov 2000 | British | 71 years |
| David Maxwell Weston | Director | 2 Oct 2006 | 29 May 2009 | British | 68 years |
| Deborah Grimason | Director | 4 Apr 2013 | 20 Nov 2013 | British | 63 years |
| Fiona Puleston Penhallurick | Director | 1 Apr 2014 | 15 Mar 2016 | British | 59 years |
| Francis Keith John Jackson | Director | 31 Dec 2000 | 31 Mar 2005 | British | 77 years |
| George Frank Cliffe | Director | 18 Dec 1992 | 31 Dec 1994 | British | 90 years |
| George William Bolsover | Director | 1 Jan 1995 | 13 Mar 2000 | British | 76 years |
| Graham Samuel Greenhalgh | Director | 31 Dec 2000 | 31 Mar 2005 | British | 79 years |
| Guy Franklin Young | Director | 21 Jan 2011 | 31 Oct 2015 | South African | 57 years |
| Ian Lichfield | Director | 18 May 2009 | 15 Oct 2012 | English | 59 years |
| Jack Mawdsley | Director | 15 Nov 1992 | 30 Nov 1992 | British | 88 years |
| James Joseph Pearse | Director | 1 Mar 1996 | 30 Apr 1997 | Irish | 81 years |
| James Mcneilly Evans | Director | 31 Dec 2000 | 31 Dec 2003 | British | 85 years |
| James Richard Stirk | Secretary | 4 Jan 1993 | 18 Dec 1992 | British | - |
| James Richard Stirk | Secretary | 15 Nov 1993 | 30 Nov 2012 | British | - |
| Jeremy David Hilliard | Director | 1 Jan 2004 | 16 May 2005 | British | 66 years |
| Jeremy Michael Greenwood | Director | 4 Apr 2013 | 30 Nov 2020 | British | 60 years |
| Johanna O'driscoll | Director | 11 Dec 2017 | 28 Feb 2023 | Irish | 50 years |
| Johannes Frederick Van Blerk Serfontein | Director | 18 May 2009 | 1 Feb 2011 | South African | 58 years |
| John Ferguson Bowater | Director | 4 Jan 1993 | 3 Feb 2004 | British | 77 years |
| John Joseph Thomas Hewitt Glaves | Director | 18 Dec 1992 | 30 May 1997 | British | 88 years |
| John Richard Bradshaw | Secretary | 30 Nov 2012 | 5 Apr 2013 | British | - |
| John Richard Bradshaw | Secretary | 18 Dec 1992 | 4 Jan 1993 | British | - |
| John Tony Davies | Director | 19 Nov 2002 | 29 May 2009 | British | 71 years |
| Karim Hajjar | Director | 31 Mar 2005 | 21 Dec 2010 | British | 63 years |
| Keith Bryan | Director | 30 Jul 1999 | 13 Mar 2000 | British | 75 years |
| Kenneth Alfred Riley | Director | 31 Dec 2000 | 12 Nov 2002 | British | 85 years |
| Malcolm Whittle | Director | 18 Dec 1992 | 30 May 1997 | British | 79 years |
| Mark Thomas Wood | Director | 21 Aug 2017 | 31 Aug 2025 | British | 53 years |
| Mark Wilson Joel | Director | 22 May 2015 | 21 Aug 2017 | British | 63 years |
| Martin Kenneth Riley | Director | 4 Apr 2013 | 30 Mar 2021 | British | 59 years |
| Michael John Saunders | Director | 1 Jan 2004 | 31 Dec 2005 | British | 70 years |
| Paul Fleetham | Director | 4 Apr 2013 | 30 Apr 2022 | British | 65 years |
| Paul Gwilt | Director | 31 Dec 2000 | 31 Dec 2003 | British | 79 years |
| Peter Beresford Rothwell | Director | 15 Nov 1992 | 29 Jun 2001 | British | 86 years |
| Peter Buckley | Director | 30 Mar 2021 | 30 Oct 2024 | Irish | 61 years |
| Peter Edward Whittle | Director | 1 Jun 2004 | 15 Oct 2007 | British | 74 years |
| Peter John Gillatt | Director | 1 Mar 1996 | 13 Jun 1997 | British | 66 years |
| Richard Blair Illingworth | Director | 18 May 2009 | 2 Sept 2011 | British | 63 years |
| Richard Lloyd Isaacs | Director | 1 Jan 1995 | 27 Aug 1997 | British | 81 years |
| Robert Ian Walter Boyd | Director | 12 Jul 2004 | 16 May 2005 | British | 81 years |
| Robert Sinclair Robertson | Director | 31 Dec 2000 | 15 Dec 2006 | British | 75 years |
| Robin John Doody | Director | 27 Dec 2018 | 30 Jun 2024 | British | 51 years |
| Roy James Harrison | Director | 1 Mar 1996 | 13 Mar 2000 | British | 79 years |
| Rupert Burne | Director | 1 Jan 2008 | 10 Apr 2012 | British | 63 years |
| Samantha Jane Hoe Richardson | Director | 7 Nov 2000 | 11 Nov 2000 | British | 55 years |
| Terence Robert Last | Director | 1 May 2001 | 5 Apr 2013 | British | 76 years |
| Timothy Conrad Langston Hall | Director | 31 Dec 2000 | 16 May 2005 | English | 73 years |