| Andrew John Bowman | Director | 5 Sept 2014 | 5 Mar 2018 | British | 54 years |
| Angus Smith | Director | 31 Jan 2007 | 22 Oct 2008 | British | 63 years |
| Ann Hird | Director | 23 Apr 2012 | 15 Nov 2012 | British | 69 years |
| Anthony Nicholas Greatorex | Director | 3 Feb 2014 | 5 Sept 2014 | British | 58 years |
| Antony Vincent Holt | Director | 22 Oct 2008 | 23 Apr 2012 | British | 67 years |
| David William Crawford | Director | 30 Aug 2013 | 6 Dec 2013 | British | 56 years |
| Frances Louise Snowden | Secretary | 1 May 2000 | 31 Jan 2007 | British | - |
| Jeremy Peter Small | Secretary | 22 Dec 2008 | 23 Apr 2012 | British | - |
| Joyce Hazel Sargent | Secretary | 4 Jun 1992 | 30 Apr 2000 | British | - |
| Nicholas Mckenzie Herbert Burns | Director | 23 Apr 2012 | 12 Aug 2014 | British | 59 years |
| Nicolas Norman Bedford | Director | 23 Apr 2012 | 4 May 2012 | British | 67 years |
| Peter Gray | Director | 31 Jan 2007 | 31 Mar 2010 | British | 80 years |
| Philip John Anderson | Director | 18 Dec 2008 | 23 Apr 2012 | British | 62 years |
| Simon Lawrence Vernon Cole | Secretary | 31 Jan 2007 | 22 Dec 2008 | British | - |
| Stephen George Ingram | Director | 4 Jun 1992 | 16 Aug 2010 | British | 70 years |
| Stephen Sharp | Director | 23 Apr 2012 | 3 Feb 2014 | British | 61 years |
| Susan Lesley Ring | Director | 12 Aug 2014 | 5 Mar 2018 | British | 65 years |