| Alexander Reginald Benton | Director | 27 Jul 2010 | 15 May 2013 | British | 75 years |
| Barbara Kahan | Director | 27 Jul 2010 | 27 Jul 2010 | British | 95 years |
| Charles Peter Cobb | Director | 27 Jul 2010 | 23 Jan 2013 | British | 72 years |
| David Keith Tipping | Secretary | 27 Jul 2010 | 10 Apr 2012 | British | - |
| Elizabeth Barbara Cheney | Secretary | 24 Apr 2017 | 31 Dec 2017 | - | - |
| James Thomas Holliday | Director | 1 Nov 2011 | 1 Nov 2011 | British | 71 years |
| Jeremy Philip Hilton Vickers | Secretary | 19 Jun 2014 | 24 Jul 2015 | - | - |
| Jeremy Philip Hilton Vickers | Director | 23 May 2014 | 24 Jul 2015 | British | 69 years |
| Martin John Sidders | Director | 27 Jul 2010 | 19 Jun 2014 | British | 68 years |
| Martin John Sidders | Secretary | 11 Apr 2012 | 19 Jun 2014 | - | - |
| Martin Richard Smith | Director | 28 Jan 2013 | 31 Dec 2020 | British | 71 years |
| Michael Blakey | Director | 24 Jul 2015 | 30 Jun 2020 | British | 63 years |
| Susan Gaynor Hide | Secretary | 24 Jul 2015 | 24 Apr 2017 | - | - |