| Adele Ann Abigail | Director | 7 Aug 2008 | 1 Oct 2009 | Irish | 53 years |
| Alan Grant Mcquaker | Director | 1 Oct 1990 | 31 Jan 1991 | British | 92 years |
| Alan Gray Rutherford | Director | 20 Jun 1989 | 30 Jun 1998 | British | 84 years |
| Alexander Chalmers Edwards | Director | 20 Jun 1989 | 31 Jul 1989 | British | 95 years |
| Alexander Gordon Hills | Director | 7 Jan 1992 | 30 Nov 1996 | British | 92 years |
| Allan Burns | Director | 6 Dec 2004 | 1 Jun 2006 | British | 79 years |
| Andrew Mark Smith | Director | 29 Jun 2009 | 20 Jun 2012 | British | 62 years |
| Andrew Mark Smith | Director | 29 Jun 2009 | 20 Jun 2012 | British | 62 years |
| Aniko Mahler | Director | 5 Nov 2015 | 1 Aug 2018 | Hungarian | 50 years |
| Brian Higgs | Director | 15 Nov 1999 | 5 Apr 2013 | British | 67 years |
| Bryan Harold Donaghey | Director | 12 Mar 2007 | 14 May 2013 | British | 65 years |
| Catriona Mcnab | Director | 20 Jun 1989 | 30 Jun 1990 | British | 69 years |
| Catriona Mcnab | Secretary | 20 Jun 1989 | 9 Feb 1990 | British | - |
| Charles Dawson Coase | Director | 9 Aug 2005 | 31 Mar 2011 | British | 66 years |
| Christine Margaret Genevieve Wright | Director | 25 Oct 2000 | 4 Nov 2003 | British | 72 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 | - | - |
| David Alan Cameron | Director | 1 Feb 1991 | 30 Nov 1994 | British | 77 years |
| David Anthony Hardie | Director | 30 Jun 1998 | 1 Dec 1999 | British | 82 years |
| David Frederick Harlock | Director | 26 May 2016 | 1 Aug 2018 | British | 66 years |
| David Heginbottom | Director | 16 Jun 2011 | 1 Aug 2013 | British | 56 years |
| Dorotea Keresztesi | Director | 11 Sept 2020 | 14 Jun 2024 | Hungarian | 40 years |
| Edward Mcshane | Director | 25 Oct 2000 | 1 Dec 2004 | British | 54 years |
| Eric Robert Mckay Young | Director | 20 Jun 1989 | 31 Dec 1991 | British | 81 years |
| Frank Oliver Robson | Director | 17 Oct 1989 | 30 Jun 1998 | British | 87 years |
| Gabor Kovacs | Director | 1 Aug 2018 | 1 Sept 2020 | Hungarian | 46 years |
| Gavin Paul Crickmore | Director | 28 Jun 2007 | 1 Aug 2013 | British | 68 years |
| George Nichol Bathgate | Director | 1 Feb 1991 | 31 May 1998 | British | 83 years |
| Ian Anthony Hockney | Director | 1 Oct 2014 | 5 Nov 2015 | British | 51 years |
| James Turnbull | Director | 15 Nov 1999 | 31 Aug 2000 | British | 80 years |
| Jeffrey Milliken | Director | 25 Oct 2000 | 9 Aug 2005 | British | 62 years |
| Jill Kyne | Director | 28 Jun 2007 | 29 Jun 2009 | British | 62 years |
| John James Nicholls | Director | 16 Jun 2011 | 9 Mar 2018 | British | 64 years |
| John James Nicholls | Secretary | 15 Mar 2002 | 2 Feb 2012 | British | - |
| John William Highet | Director | 1 Feb 1991 | 30 Sept 1994 | British | 88 years |
| Jonathan Michael Guttridge | Secretary | 5 Jan 2018 | 20 Apr 2018 | - | - |
| Jose Alberto Ibeas Franco | Director | 16 Dec 2011 | 1 Aug 2013 | Spanish | 54 years |
| Kenneth William Delahunt | Director | 20 Jun 1989 | 31 Aug 1995 | British | 87 years |
| Mark David Peters | Secretary | 31 Mar 1998 | 10 Nov 2000 | British | - |
| Matthew John Lester | Director | 9 Aug 2005 | 31 Aug 2006 | British | 63 years |
| Michael Christopher Flynn | Director | 9 Aug 2005 | 15 Jun 2008 | British | 69 years |
| Nandor Makos | Director | 26 May 2006 | 1 Aug 2014 | Hungarian | 62 years |
| Paul Derek Tunnacliffe | Director | 7 Jan 2008 | 30 Jun 2016 | British | 64 years |
| Raymond James Joy | Director | 20 Apr 2004 | 22 Jun 2007 | British | 72 years |
| Richard James Bee | Director | 16 Mar 2010 | 26 Oct 2011 | British | 58 years |
| Richard William Bedford | Director | 9 Aug 2005 | 11 Feb 2010 | British | 60 years |
| Robert Mcelroy | Director | 15 Nov 1999 | 25 Oct 2000 | British | 73 years |
| Roger Hugh Myddelton | Director | 30 Jun 1998 | 31 Mar 2003 | British | 84 years |
| Ronald James Gilchrist | Secretary | 9 Feb 1990 | 31 Mar 1998 | British | - |
| Ronald Kerr Martin | Director | 20 Jun 1989 | 31 Oct 1991 | British | 95 years |
| Sally Catherine Moore | Director | 28 Jun 2007 | 3 Mar 2010 | British | 61 years |
| Stephen John Bolton | Director | 1 Apr 2011 | 1 Aug 2013 | British | 64 years |
| Stuart Lorimer | Director | 29 Nov 2011 | 1 Aug 2013 | British | 60 years |
| Susanne Margaret Bunn | Director | 13 Aug 1998 | 4 Jan 2008 | British | 67 years |
| Susanne Margaret Bunn | Secretary | 10 Nov 2000 | 15 Mar 2002 | British | - |
| Tom Ness | Director | 4 Nov 2003 | 1 Dec 2004 | British | 74 years |
| Turnbull Hutton | Director | 21 Nov 1990 | 31 Oct 2001 | British | 80 years |
| Victoria Cooper | Secretary | 5 Nov 2015 | 23 Mar 2017 | - | - |