| Andrew Charles Phillip Carr-locke | Director | 1 Oct 1996 | 30 Jun 1998 | British | 73 years |
| Andrew Damian Rush | Director | 1 Jan 1993 | 26 Jan 1993 | British | 69 years |
| Andrew David Neal | Director | 29 Mar 1993 | 31 Dec 1995 | British | 68 years |
| Andrew James Allner | Director | 1 Jan 1996 | 30 Sept 1996 | British | 73 years |
| Andrew Mark Smith | Director | 24 Mar 2011 | 2 Feb 2012 | British | 62 years |
| Aniko Mahler | Director | 5 Nov 2015 | 1 Aug 2018 | Hungarian | 50 years |
| Brian Burden | Director | 18 Dec 1991 | 28 Sept 1992 | British | 71 years |
| Brian Burden | Secretary | 18 Dec 1991 | 29 Jan 1993 | British | - |
| Charles Dawson Coase | Director | 7 Apr 2005 | 31 Mar 2011 | British | 66 years |
| Christopher Richard Roff Marsh | Director | 17 Feb 2006 | 30 Sept 2007 | British | 58 years |
| Claire Elizabeth Matthews | Secretary | 2 Feb 2012 | 5 Jan 2018 | - | - |
| Crispen Henry Davis | Director | 15 Jan 1992 | 4 Jun 1992 | British | 77 years |
| David Adams Henry Harley | Director | 15 Jan 1992 | 30 Apr 1993 | British | 96 years |
| David Frederick Harlock | Director | 26 May 2016 | 1 Aug 2018 | British | 66 years |
| David Heginbottom | Director | 24 Mar 2011 | 2 Feb 2012 | British | 56 years |
| Edward Matthew Fazal | Director | 15 Jan 1992 | 28 Sept 1992 | British | 73 years |
| Gavin Paul Crickmore | Director | 28 Jun 2007 | 2 Feb 2012 | British | 68 years |
| Gerhard Biedenbacher | Director | 1 Jun 1995 | 29 Feb 1996 | German | 75 years |
| Graham Lancaster Thompson | Director | 18 Dec 1991 | 31 May 1995 | British | 82 years |
| Graham Lancaster Thompson | Director | 1 Jan 1996 | 16 Jun 1999 | British | 82 years |
| Ian Anthony Hockney | Director | 1 Oct 2014 | 5 Nov 2015 | British | 51 years |
| Ian Keith Meakins | Director | 2 Oct 1997 | 22 Nov 2004 | British | 70 years |
| Jill Kyne | Director | 28 Jun 2007 | 29 Jun 2009 | British | 62 years |
| John Carl Pollaers | Director | 29 Jan 1993 | 31 Dec 1995 | British | 64 years |
| John Christopher Long | Director | 1 Jan 1996 | 16 Nov 1998 | British | 71 years |
| John James Nicholls | Director | 24 Mar 2011 | 9 Mar 2018 | British | 64 years |
| John James Nicholls | Secretary | 15 Mar 2002 | 2 Feb 2012 | British | - |
| Jonathan Michael Guttridge | Secretary | 5 Jan 2018 | 8 Mar 2018 | - | - |
| Jose Alberto Ibeas Franco | Director | 16 Dec 2011 | 2 Feb 2012 | Spanish | 54 years |
| Len John Bodill | Director | 1 Apr 1992 | 31 Dec 1995 | British | 74 years |
| Lord Macfarlane Of Bearsden | Director | 15 Jan 1992 | 31 Dec 1995 | British | 100 years |
| Mark David Peters | Secretary | 31 Mar 1998 | 10 Nov 2000 | British | - |
| Matthew John Lester | Director | 5 Jan 2005 | 31 Aug 2006 | British | 63 years |
| Michael Christopher Flynn | Director | 7 Apr 2005 | 15 Jun 2008 | British | 69 years |
| Michael Colvin Keiller | Director | 1 Jun 1995 | 16 Nov 1998 | British | 72 years |
| Nandor Makos | Director | 27 Jul 2006 | 1 Aug 2014 | Hungarian | 62 years |
| Nicholas Charles Rose | Director | 16 Nov 1998 | 1 Jul 1999 | British | 69 years |
| Paul Derek Tunnacliffe | Director | 7 Jan 2008 | 30 Jun 2016 | British | 64 years |
| Paviter Singh Binning | Director | 31 Mar 2003 | 3 Oct 2003 | British | 66 years |
| Peter William Phillipson | Director | 15 Jan 1992 | 1 Jan 1993 | British | 72 years |
| Philip John Parnell | Director | 4 Jun 1992 | 2 Oct 1997 | British | 74 years |
| Phillip Keague Bentley | Director | 1 Jul 1999 | 31 Oct 2000 | British | 67 years |
| Ravi Rajagopal | Director | 3 Oct 2003 | 7 Apr 2005 | British | 71 years |
| Roger Hugh Myddelton | Director | 16 Nov 1998 | 31 Mar 2003 | British | 84 years |
| Ronald James Gilchrist | Secretary | 29 Jan 1993 | 31 Mar 1998 | British | - |
| Sally Catherine Moore | Director | 28 Jun 2007 | 24 Mar 2011 | British | 61 years |
| Stephen John Bolton | Director | 1 Apr 2011 | 2 Feb 2012 | British | 64 years |
| Susanne Margaret Bunn | Director | 15 Mar 2002 | 4 Jan 2008 | British | 67 years |
| Susanne Margaret Bunn | Secretary | 10 Nov 2000 | 15 Mar 2002 | British | - |
| Thomas Moffat Muir Graham | Director | 1 Dec 1991 | 28 Sept 1992 | British | 79 years |
| Victoria Cooper | Secretary | 5 Nov 2015 | 23 Mar 2017 | - | - |