| Charles Eugene Shackleton Strickland | Secretary | 23 Sept 2015 | 30 Jun 2020 | - | - |
| David Evison | Director | 9 Apr 2018 | 30 Nov 2022 | British | 62 years |
| Jenny Nancy Loncaster | Secretary | 1 Jun 2005 | 20 Nov 2013 | British | - |
| Joanna Carolyn Richardson | Director | 5 Dec 2006 | 27 Feb 2008 | British | 57 years |
| John Sloan Martin | Secretary | 25 Jul 1991 | 31 May 2005 | British | - |
| Jonathan Paul Barrett | Secretary | 20 Nov 2013 | 23 Sept 2015 | - | - |
| Neil Jowsey | Director | 20 Nov 2013 | 9 Apr 2018 | British | 62 years |
| Nicholas Alexander Cyril Hildyard | Director | 10 Mar 2008 | 20 Nov 2013 | British | 72 years |
| Stephen Martin | Director | 25 Jul 1991 | 3 Jan 2007 | British | 87 years |
| Tom Martin | Director | 25 Jul 1991 | 3 Jan 2007 | British | 90 years |
