| Angela Ann Knight | Director | 15 Oct 1998 | 30 Apr 2001 | British | 76 years |
| Claire Helen Smith | Director | 1 Mar 2008 | 27 Jan 2012 | British | 70 years |
| David Ernest Palmer | Director | 10 May 1992 | 20 Aug 1995 | British | 91 years |
| Denise Ann Bower Obe | Director | 1 Jan 2020 | 31 Dec 2023 | British | 58 years |
| Frank Turner | Director | 1 Aug 2000 | 31 Dec 2004 | British | 83 years |
| Guy William Ingledew Leonard | Director | 1 Jul 2007 | 31 Dec 2020 | British | 71 years |
| Ian Martin Richard Galbraith | Director | 1 Jan 2018 | 30 Sept 2025 | British | 63 years |
| James Douglas Gadd | Director | 1 Nov 1995 | 30 Apr 2000 | British | 93 years |
| Jeffrey Alan Turnbull | Director | 10 May 1992 | 13 Aug 1994 | British | 92 years |
| Jermyn Paul Brooks | Director | 24 Jan 2003 | 11 Dec 2009 | British | 87 years |
| John Frederick Robson | Director | 10 May 1992 | 18 Jun 1992 | British | 94 years |
| Judith Ann Lowe | Director | 1 Mar 1996 | 2 Jun 1998 | British | 81 years |
| Julia Maria Walsh | Director | 1 Sept 2000 | 31 Dec 2002 | British | 78 years |
| Keith John Howells | Director | 1 Jan 2002 | 30 Jun 2019 | British | 73 years |
| Kevin John Stovell | Director | 1 Jan 2002 | 27 Nov 2015 | British | 74 years |
| Kevin Paul Dixon | Director | 1 Jul 2007 | 31 Mar 2016 | British | 73 years |
| Mark Edward Austin | Director | 1 Nov 2009 | 30 Jun 2014 | British | 77 years |
| Martin Stevenson Crosbie Frame | Director | 13 May 2002 | 29 Apr 2005 | British | 81 years |
| Michael David Haigh | Director | 1 Jan 2013 | 31 Jul 2022 | British | 66 years |
| Michael Orlando Blackburn | Director | 10 Jan 1997 | 18 Oct 2007 | British | 81 years |
| Nicholas Mauro Denichilo | Director | 27 Apr 2016 | 31 Dec 2021 | American | 74 years |
| Peter John Clayson | Director | 10 May 1992 | 28 May 1993 | British | 93 years |
| Peter John Wickens | Director | 1 Jan 2002 | 31 Dec 2010 | British | 76 years |
| Peter Michael Chesworth | Director | 10 May 1992 | 30 Sept 2005 | British | 81 years |
| Philip Charles Gregory | Secretary | 15 Mar 1996 | 31 May 2014 | British | - |
| Richard Williams | Director | 1 Jul 2007 | 31 Mar 2015 | British | 71 years |
| Robert Arthur Paine | Director | 1 Aug 1992 | 31 Dec 1995 | British | 91 years |
| Robert Beresford | Director | 10 May 1992 | 20 Nov 1998 | British | 88 years |
| Robert William Squire | Director | 1 Jan 2006 | 30 Jun 2007 | Australian | 80 years |
| Robin Bretten Fox | Director | 1 May 1993 | 10 May 2002 | British | 83 years |
| Robin Bretten Fox | Secretary | 10 May 1992 | 30 Apr 1994 | British | - |
| Tessa Ann Vosper Blackstone | Director | 1 Nov 2005 | 14 Jan 2008 | British | 84 years |
| Timothy John Thirlwall | Director | 10 May 1992 | 4 Dec 2003 | British | 83 years |
| William Gregor Desson | Secretary | 1 May 1994 | 15 Mar 1996 | British | - |