| Andrew James Jackson Dawson | Director | 18 Jan 1992 | 17 Aug 1993 | British | 78 years |
| Andrew John Bowman | Director | 16 Feb 2016 | 28 Sept 2017 | British | 54 years |
| Ann Hird | Director | 22 Sept 2010 | 15 Nov 2012 | British | 69 years |
| Anthony Robert Daniel Barnard | Director | 15 Nov 2007 | 18 Jun 2009 | British | 67 years |
| Archibald Baxter Jenkins | Director | 26 Sept 2000 | 12 Aug 2003 | British | 86 years |
| Charles Douglas Scott | Director | 18 Jan 1992 | 31 Mar 2000 | British | 85 years |
| Clive Martin Grimley | Director | 17 Aug 1993 | 4 Jun 2003 | British | 72 years |
| Colin Douglas Bamford | Director | 14 Apr 2005 | 18 Jun 2009 | British | 78 years |
| David George Brooks | Director | 30 Oct 2001 | 15 Nov 2007 | British | 77 years |
| Douglas Lindsay Hay Laver | Director | 1 Oct 2012 | 3 Feb 2014 | British | 61 years |
| Eamonn Martin O Connor | Director | 2 Sept 2004 | 4 Nov 2005 | British | 63 years |
| Ian Edward Jarvis | Director | 3 Feb 2014 | 16 Feb 2016 | British | 55 years |
| Linda Margarethe Philp | Director | 4 Jun 2003 | 9 Aug 2004 | British | 74 years |
| Michael Addenbrooke | Director | 18 Jun 2009 | 28 Jun 2010 | British | 71 years |
| Michael Addenbrooke | Director | 1 Dec 2011 | 22 Nov 2012 | British | 71 years |
| Michael Geoffrey Minton Haines | Director | 9 Nov 1998 | 31 Dec 2001 | British | 91 years |
| Nicholas Mckenzie Herbert Burns | Director | 5 Oct 2012 | 12 Aug 2014 | British | 59 years |
| Nicolas Norman Bedford | Director | 19 Oct 2009 | 22 Sept 2010 | British | 67 years |
| Philip Charles Braithwaite | Director | 18 Jun 2009 | 28 Jun 2010 | British | 75 years |
| Simon John Davies | Director | 18 Jun 2009 | 19 Oct 2009 | British | 58 years |
| Stephen David Parkinson | Director | 18 Jun 2009 | 28 Jun 2010 | British | 63 years |
| Stephen John Ingamells | Director | 22 Nov 2012 | 30 Jun 2019 | British | 68 years |
| Susan Lesley Ring | Director | 12 Aug 2014 | 20 Jul 2018 | British | 65 years |
| Thomas Kelman | Director | 18 Jan 1992 | 31 May 2005 | British | 65 years |
| Thomas Kelman | Secretary | 18 Jan 1992 | 31 May 2005 | British | - |
| Thomas Peregrine Calvert-lee | Secretary | 31 May 2005 | 18 Jun 2009 | British | - |
| Timothy Richard Webb | Director | 4 Jun 2003 | 3 Jun 2004 | British | 68 years |