| Adele Ann Abigail | Director | 7 Aug 2008 | 1 Oct 2009 | Irish | 53 years |
| Alistair Charles Walter Williams | Director | 13 Jun 2002 | 18 Apr 2003 | British | 63 years |
| Andrew Mark Smith | Director | 29 Jun 2009 | 29 Jun 2009 | British | 62 years |
| Andrew Mark Smith | Director | 29 Jun 2009 | 2 Feb 2012 | British | 62 years |
| Aniko Mahler | Director | 5 Nov 2015 | 1 Aug 2018 | Hungarian | 50 years |
| Brendon Richard O'neill | Director | 28 Jun 1996 | 8 May 1998 | British | 78 years |
| Brian Ford Baldock | Director | 13 Aug 1992 | 28 Jun 1996 | British | 92 years |
| Charles Dawson Coase | Director | 9 Aug 2005 | 31 Mar 2011 | British | 66 years |
| Claire Elizabeth Matthews | Secretary | 2 Feb 2012 | 5 Jan 2018 | - | - |
| Colin Archibald Storm | Director | 13 Aug 1992 | 12 Apr 2001 | British | 87 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 |
| David Herbert Campbell Hampshire | Director | 8 May 1998 | 9 Aug 2005 | British | 82 years |
| Dorotea Keresztesi | Director | 11 Sept 2020 | 14 Jun 2024 | Hungarian | 40 years |
| Gabor Kovacs | Director | 1 Aug 2018 | 1 Sept 2020 | Hungarian | 46 years |
| Gavin Paul Crickmore | Director | 5 Sept 2007 | 2 Feb 2012 | British | 68 years |
| Ian Anthony Hockney | Director | 1 Oct 2014 | 5 Nov 2015 | British | 51 years |
| John Frederick Hearnden | Director | 13 Aug 1992 | 30 Jun 1994 | British | 82 years |
| John James Nicholls | Director | 24 Mar 2011 | 9 Mar 2018 | British | 64 years |
| John James Nicholls | Secretary | 31 Oct 2001 | 2 Feb 2012 | British | - |
| Jonathan Michael Guttridge | Secretary | 5 Jan 2018 | 20 Apr 2018 | - | - |
| Jose Alberto Ibeas Franco | Director | 16 Dec 2011 | 2 Feb 2012 | Spanish | 54 years |
| Mark David Peters | Secretary | 13 Aug 1992 | 1 Jun 1997 | 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 | 3 Aug 2006 | 1 Aug 2014 | Hungarian | 62 years |
| Nicholas Bodo Blazquez | Director | 9 Aug 2005 | 24 Mar 2011 | British | 65 years |
| Paul Derek Tunnacliffe | Director | 7 Jan 2008 | 30 Jun 2016 | British | 64 years |
| Paul Martin Forster | Secretary | 1 Jun 1997 | 26 Jan 1998 | British | - |
| Raymond James Joy | Director | 10 Oct 1997 | 22 Jun 2007 | British | 72 years |
| Sharon Maria Elizabeth Odonovan | Secretary | 26 Jan 1998 | 31 Oct 2001 | British | - |
| Stephen John Bolton | Director | 1 Apr 2011 | 2 Feb 2012 | British | 64 years |
| Susanne Margaret Bunn | Director | 9 Aug 2005 | 4 Jan 2008 | British | 67 years |
| Victoria Cooper | Secretary | 5 Nov 2015 | 23 Mar 2017 | - | - |