| Alan Golacinski | Director | 1 Dec 1996 | 4 Jun 1999 | American | 76 years |
| Alastair George Angus Morrison | Director | 3 Apr 1992 | 11 Dec 1998 | British | 84 years |
| Celine Arlette Virginie Barroche | Secretary | 9 Dec 2010 | 31 Jan 2016 | - | - |
| Celine Arlette Virginie Barroche | Director | 1 Jan 2017 | 1 Aug 2024 | French | 52 years |
| Charles Latham Baillieu | Director | 12 May 2021 | 30 Sept 2024 | British | 41 years |
| Christopher David Beese | Director | 25 Nov 2003 | 9 Apr 2009 | British | 71 years |
| Christopher David Beese | Secretary | 13 Oct 1998 | 3 Feb 2004 | British | - |
| Claire Michelle Teague | Secretary | 3 Feb 2004 | 27 Jun 2008 | British | - |
| David Alan Collett | Director | 6 Sept 2002 | 25 Nov 2003 | British | 80 years |
| David Gwynder Lewis | Director | 3 Apr 1992 | 3 Jun 1994 | British | 84 years |
| David John Seaton | Director | 3 Aug 2001 | 26 Nov 2007 | British | 66 years |
| David Wilfred Abbot | Director | 1 Dec 1996 | 3 Aug 2001 | British | 88 years |
| David William Watson | Director | 17 Oct 1997 | 19 Mar 1998 | American | 74 years |
| Derek Graye Shattky | Director | 17 Oct 1997 | 30 Jun 1999 | New Zealand | 83 years |
| Eric Walter Rothbarth | Director | 23 Jul 1998 | 2 Aug 1999 | Dutch | 71 years |
| Frank Edward Noah | Director | 3 Apr 1992 | 30 Nov 1992 | British | 84 years |
| Gordon Thomas Riddell Birdwood | Director | 1 Oct 1997 | 13 Oct 1998 | British | 77 years |
| Gordon Thomas Riddell Birdwood | Secretary | 1 Oct 1997 | 13 Oct 1998 | British | - |
| Himanshu Haridas Raja | Director | 28 Feb 2014 | 1 Oct 2016 | British | 61 years |
| Jerome Hoffman | Director | 25 Nov 2003 | 14 Jul 2006 | American | 85 years |
| John Michael May | Director | 6 Jul 1994 | 31 Jul 1996 | British | 71 years |
| John Randolph Hustler | Director | 23 Nov 1993 | 31 Jul 1996 | British | 80 years |
| John Randolph Hustler | Secretary | 1 Jan 1996 | 16 Apr 1997 | British | - |
| Lord Bethell | Director | 28 Apr 1994 | 21 Sept 1998 | British | 76 years |
| Martin John Brayshaw | Director | 1 Dec 1996 | 1 Oct 1997 | British | 71 years |
| Martin John Brayshaw | Secretary | 16 Apr 1997 | 1 Oct 1997 | British | - |
| Matthew Edward Stanley Brabin | Director | 14 Jul 2006 | 13 Feb 2009 | British | 61 years |
| Matthew Gordon Philip Davies | Director | 30 Jun 2009 | 13 Aug 2010 | British | 52 years |
| Mikhail Vasileviy Golovatov | Director | 1 Dec 1996 | 25 Oct 2000 | Russian | 77 years |
| Nicholas Aidan Langdon Thomson | Director | 28 Jan 1993 | 14 Feb 1994 | British | 79 years |
| Nicholas Hurst Page | Director | 3 Apr 1992 | 24 May 1993 | British | 74 years |
| Nigel Anthony Billingham | Director | 13 Feb 2009 | 9 Dec 2010 | British | 70 years |
| Noel Albert Philp | Director | 1 Dec 1996 | 30 Jun 2009 | New Zealander | 77 years |
| Peter Arthur Tawell | Director | 1 Dec 1996 | 28 Feb 1997 | British | 78 years |
| Peter James Isaacs | Secretary | 3 Apr 1992 | 31 Dec 1995 | British | - |
| Peter Vincent David | Director | 9 Dec 2010 | 31 Dec 2016 | British | 68 years |
| Soren Lundsberg-nielsen | Director | 9 Dec 2010 | 24 Nov 2021 | Danish | 75 years |
| Stephen John Loffler | Director | 5 May 1999 | 6 Sept 2002 | British | 73 years |
| Timothy Peter Weller | Director | 24 Oct 2016 | 11 May 2021 | British | 63 years |
| Vaishali Jagdish Patel | Secretary | 22 Jan 2018 | 5 May 2021 | - | - |
| Vasihali Jagdish Patel | Secretary | 30 Jul 2008 | 9 Dec 2010 | British | - |
| William Andrew Hayes | Secretary | 31 Jan 2016 | 22 Jan 2018 | - | - |
| William Hebden Daniell | Director | 1 Dec 1996 | 25 Oct 2000 | British | 65 years |