| Andrew David Pomfret | Director | 1 Aug 1999 | 28 Feb 2014 | British | 66 years |
| Andrew John Crickmore | Director | 1 Dec 1999 | 20 Aug 2002 | British | 60 years |
| Andrew Timothy Morris | Director | 24 Sept 1997 | 31 Dec 2012 | British | 62 years |
| Bernard Kenny | Director | 1 Dec 1999 | 27 Jul 2012 | British | 67 years |
| Caroline Mary Burton | Director | 26 Nov 2003 | 14 Nov 2005 | British | 76 years |
| Caroline Mary Burton | Director | 8 Feb 2012 | 14 May 2013 | British | 76 years |
| Catherine Rosemary Reid Avery | Director | 8 Feb 2012 | 14 May 2013 | British | 66 years |
| Clare Gore Langton | Director | 1 Dec 1999 | 30 Jun 2009 | British | 72 years |
| Clive Richard Charles Hexton | Director | 29 May 2002 | 30 Jun 2009 | British | 66 years |
| Colin Martin Clark | Director | 24 Oct 2018 | 28 Jul 2022 | British | 67 years |
| Colin William Kinloch | Director | 1 Feb 1996 | 6 May 1998 | British | 84 years |
| David Robin Clarke | Director | 1 Dec 1999 | 29 May 2002 | British | 84 years |
| David Stuart Macaulay | Director | 1 Jul 2009 | 8 Feb 2012 | British | 63 years |
| David Terrence Digby Harrel | Director | 8 Feb 2012 | 11 May 2017 | British | 78 years |
| Edward James Wingfield Lifford | Director | 1 Dec 1999 | 31 Dec 2006 | British | 77 years |
| Geoffrey Mark Powell | Director | 1 Feb 1996 | 11 May 2011 | British | 80 years |
| Graham Michael Thelwall Jones | Director | 23 Jun 1993 | 20 Aug 1997 | British | 83 years |
| Harold Michael Clunie Cunningham | Director | 25 Sept 1996 | 13 Sept 2006 | British | 79 years |
| Hugh Michael Barton Adlington | Director | 14 Mar 2006 | 30 Jun 2009 | British | 58 years |
| Ian Michael Buckley | Director | 27 Mar 2002 | 31 Dec 2012 | British | 76 years |
| Ian Pearce Harvey | Director | 21 Jun 1991 | 3 Sept 1999 | British | 82 years |
| Ivo Donald Stuart Bligh | Director | 14 Mar 2006 | 8 Feb 2012 | British | 58 years |
| James Christopher Barclay | Director | 26 Nov 2003 | 14 Nov 2005 | British | 81 years |
| James Michael Beale Cayzer-colvin | Director | 24 Jul 2002 | 14 Nov 2005 | British | 61 years |
| James Neilson Pettigrew | Director | 6 Mar 2017 | 6 May 2021 | British | 68 years |
| James Robert Fox | Director | 1 Jan 2007 | 30 Jun 2009 | British | 64 years |
| James William Dean | Director | 1 Nov 2013 | 5 May 2022 | British | 69 years |
| Jane Mary Dussartre | Director | 1 Dec 1999 | 23 Apr 2002 | British | 70 years |
| Jeffrey Barry Vernon | Director | 29 Nov 2000 | 7 Dec 2012 | British | 62 years |
| Jennifer Elizabeth Mathias | Director | 1 Apr 2019 | 21 Jan 2024 | British | 52 years |
| John Edward Tuck | Director | 24 Apr 1996 | 16 Nov 2000 | British | 80 years |
| John Edward Tuck | Secretary | 21 Jun 1991 | 20 Jan 1994 | British | - |
| John George Henderson | Director | 29 Nov 2000 | 30 Jun 2009 | British | 63 years |
| John Giles Selby Coode-adams | Director | 28 Feb 2000 | 14 Nov 2005 | British | 88 years |
| John Ian Moorley | Director | 29 Nov 2000 | 30 Jun 2009 | British | 71 years |
| John Nicholas Mcalpine Entwistle | Director | 1 Feb 1996 | 6 May 1998 | British | 85 years |
| John Richard Anthony Nottingham | Director | 21 Jun 1991 | 1 Jun 1993 | British | 85 years |
| John Roland Leigh | Director | 21 Jun 1991 | 30 Sept 1993 | British | 93 years |
| Jonathan Garnier Ruffer | Director | 21 Jun 1991 | 26 Apr 1994 | British | 75 years |
| Julian Richard Chillingworth | Director | 1 Jul 2009 | 8 Feb 2012 | British | 70 years |
| Kathryn Ann Matthews | Director | 8 Feb 2012 | 12 Sept 2018 | British | 67 years |
| Lorraine Antonia Carrol Dodd | Director | 1 Dec 1999 | 30 Jun 2009 | British | 71 years |
| Mark Hadden Pearson | Director | 1 Dec 1999 | 31 Oct 2000 | British | 83 years |
| Mark Patrick Nicholls | Director | 26 May 2011 | 5 Mar 2021 | British | 77 years |
| Mark William Fishwick Leather | Director | 31 Dec 1992 | 31 Dec 2003 | British | 81 years |
| Michael Alan Fishwick Leather | Director | 23 Jun 1993 | 1 Jun 2004 | British | 80 years |
| Michael Lenox Ingall | Director | 21 Jun 1991 | 7 May 2003 | British | 85 years |
| Michael Mark Webb | Director | 26 May 2010 | 8 Feb 2012 | British | 64 years |
| Oliver Duncan Stanley | Director | 21 Jun 1991 | 10 May 2000 | British | 101 years |
| Oliver Roebling Panton Corbett | Director | 8 Feb 2012 | 3 Jun 2014 | British | 61 years |
| Paul Dominic Grant Chavasse | Director | 26 Sept 2001 | 2 Nov 2016 | British | 62 years |
| Paul Egerton Vernon | Director | 21 May 2003 | 31 Dec 2005 | British | 81 years |
| Peter Graham Pearson Lund | Director | 26 Jan 2005 | 31 Mar 2010 | British | 79 years |
| Philip Luard Howell | Director | 1 Dec 2013 | 9 May 2019 | British | 71 years |
| Richard Edwin Loader | Director | 1 Dec 1999 | 30 Jun 2009 | British | 67 years |
| Richard Edwin Loader | Secretary | 26 Jan 2001 | 30 Apr 2016 | British | - |
| Richard Ian Smeeton | Director | 1 Dec 1999 | 31 Dec 2012 | British | 62 years |
| Richard Patrick Lanyon | Director | 20 Feb 1995 | 10 May 2012 | British | 75 years |
| Robert Charles Hughes-penney | Director | 14 Mar 2006 | 30 Jun 2009 | British | 58 years |
| Robert Paul Stockton | Director | 24 Sept 2008 | 18 Aug 2025 | British | 61 years |
| Roy Alfred Morris | Director | 21 Jun 1991 | 14 Nov 2005 | British | 85 years |
| Rupert Nigel Kendall Baron | Director | 14 Mar 2006 | 30 Jun 2009 | British | 65 years |
| Sebastian David Rathbone | Director | 21 Jun 1991 | 29 Dec 1994 | British | 94 years |
| Stephen David Kirby | Director | 1 Feb 1996 | 26 Jan 2001 | British | 69 years |
| Stephen David Kirby | Secretary | 20 Jan 1994 | 26 Jan 2001 | British | - |
| Strimati Crayton | Director | 1 Dec 1999 | 2 Mar 2001 | British | 74 years |
| Susan Mary Desborough | Director | 28 Jul 2004 | 28 Nov 2007 | British | 66 years |
| Thomas Ian Fleming Tod | Director | 25 Sept 1991 | 29 Dec 1994 | British | 100 years |
| Timothy Edward Eliot-cohen | Director | 14 Mar 2006 | 30 Jun 2009 | British | 58 years |
| Timothy John Bolton Carter | Director | 28 Nov 2001 | 8 Feb 2012 | British | 66 years |
| William Halliday Keatley | Director | 25 Mar 1998 | 30 Jun 2002 | British | 91 years |
| William Rathbone | Director | 1 Feb 1996 | 31 Dec 2003 | British | 90 years |