| Adam Mcghin | Secretary | 18 Nov 2014 | 27 Sept 2024 | British | - |
| Andrew Charles Phillip Carr-locke | Director | 6 Mar 2015 | 9 Feb 2022 | British | 73 years |
| Andrew Rolland Cunningham | Director | 2 Dec 1996 | 4 Jan 2016 | British | 70 years |
| Andrew Rolland Cunningham | Secretary | 18 Dec 2008 | 12 Jan 2009 | British | - |
| Antony Paul Wray | Director | 24 Oct 2011 | 6 Feb 2019 | British | 65 years |
| Arthur Robin Winwood Tomkins | Director | 25 Oct 1994 | 26 Feb 1997 | British | 100 years |
| Baroness Margaret Anne Ford | Director | 3 Jul 2008 | 8 Feb 2017 | British | 69 years |
| Belinda Richards | Director | 5 Apr 2011 | 7 Feb 2018 | British | 68 years |
| Emanuel Wolfe Davidson | Director | 13 Dec 1996 | 5 Mar 2002 | British | 95 years |
| Geoffrey Joseph Davis | Secretary | 31 May 1995 | 1 Oct 2003 | British | - |
| Henry John Pitman | Director | 1 May 2007 | 6 Feb 2013 | British | 64 years |
| Ian Coull | Director | 23 Sept 2014 | 4 Jun 2015 | British | 76 years |
| Ian Joicey Dickinson | Director | 7 Mar 1991 | 24 Feb 1994 | British | 105 years |
| John Corbitt Barnsley | Director | 27 Feb 2003 | 4 Feb 2015 | British | 78 years |
| John Streeton Ward Obe | Director | 24 Feb 1994 | 26 Feb 2004 | British | 93 years |
| Marie Louise Glanville | Secretary | 1 Oct 2003 | 22 Dec 2008 | English | - |
| Mark Greenwood | Director | 13 Sept 2010 | 22 Dec 2015 | British | 67 years |
| Maxwell Rogers Creasey | Director | 7 Mar 1991 | 24 Feb 1994 | British | 104 years |
| Michael Patrick Windle | Secretary | 17 May 2011 | 18 Nov 2014 | British | - |
| Nichola Pease | Director | 13 Jun 2001 | 24 Feb 2005 | British | 65 years |
| Nicholas Mark Fletcher Jopling | Director | 1 Sept 2010 | 29 Sept 2017 | British | 65 years |
| Nicholas Peter On | Secretary | 12 Jan 2009 | 17 May 2011 | British | - |
| Peter Michael Milburn | Director | 7 Mar 1991 | 29 Sept 1999 | British | 87 years |
| Peter Michael Milburn | Secretary | 7 Mar 1991 | 31 May 1995 | British | - |
| Peter Quentin Patrick Couch | Director | 1 Jun 2010 | 31 Jan 2014 | British | 68 years |
| Quentin The Earl Of Portsmouth | Director | 7 Mar 1991 | 5 Mar 2002 | British | 72 years |
| Richard John Rimington | Director | 7 Mar 1991 | 24 Feb 1994 | British | 106 years |
| Richard Thorn Pease | Director | 7 Mar 1991 | 24 Feb 1994 | British | 104 years |
| Robert Henry Dickinson | Director | 7 Mar 1991 | 28 Feb 2007 | British | 92 years |
| Robert Ralph Scrymgeour Hiscox | Director | 5 Mar 2002 | 8 Feb 2012 | British | 83 years |
| Robert William Ian Wilkinson | Director | 1 Oct 2015 | 8 Feb 2023 | British | 54 years |
| Robin Arthur Elidyr Herbert | Director | 24 Feb 1994 | 24 Feb 2005 | British | 92 years |
| Robin Shedden Broadhurst | Director | 26 Feb 2004 | 4 Feb 2015 | British | 80 years |
| Rupert Jerome Dickinson | Director | 24 Feb 1994 | 20 Oct 2009 | British | 67 years |
| Sean Anthony Slade | Director | 20 Jun 2002 | 12 Nov 2004 | British | 62 years |
| Simon Howard Davies | Director | 20 Nov 2012 | 30 Nov 2015 | British | 67 years |
| Stephen Dickinson | Director | 7 Mar 1991 | 10 Feb 2009 | British | 92 years |
| Stephen Robin Oldfield | Director | 24 Feb 1994 | 27 Feb 2003 | British | 79 years |
| Thomas Morton Balch | Director | 7 Mar 1991 | 26 Feb 1997 | British | 93 years |
| Vanessa Kate Simms | Director | 11 Feb 2016 | 26 Apr 2021 | British | 51 years |
| William Tudor John | Director | 24 Feb 2005 | 9 Feb 2011 | British | 82 years |