| Amelia Mary Staveley | Director | 7 Jul 2017 | 15 Jul 2019 | British | 40 years |
| Anna Clare Bond | Director | 21 May 2018 | 15 Jul 2019 | British | 45 years |
| Catherine Susan Stevenson | Director | 6 Jan 2017 | 7 Jul 2017 | British | 43 years |
| David Peter Conway | Director | 17 Sept 1991 | 3 Nov 2010 | British | 81 years |
| David Peter Conway | Secretary | 17 Sept 1991 | 2 Sept 2003 | British | - |
| Douglas John Green | Director | 17 Sept 1991 | 8 Nov 2001 | British | 81 years |
| Douglas Nigel Crichton | Director | 6 Jan 2017 | 15 Jul 2019 | British | 50 years |
| Gary James Powell | Director | 3 Nov 2010 | 3 Dec 2012 | British | 52 years |
| Giles Andrew Clarke | Director | 3 Nov 2010 | 7 Nov 2013 | British | 59 years |
| Ian Douglas Mair | Director | 3 Dec 2012 | 20 Jun 2014 | British | 53 years |
| Jacqueline Alice Conway | Secretary | 13 Nov 2001 | 2 Sept 2003 | British | - |
| John Edward Thompson Clark | Director | 3 Nov 2010 | 7 Nov 2013 | British | 57 years |
| Jorge Emanuel Mendonca | Director | 6 Jan 2017 | 21 May 2018 | British | 63 years |
| Katharine Emma Robinson | Secretary | 3 Nov 2010 | 7 Jun 2018 | British | - |
| Keith John Bailey | Director | 6 Jan 2017 | 15 Jul 2019 | British | 47 years |
| Nigel Auriol Hughes | Director | 6 Jan 2017 | 27 Mar 2019 | British | 69 years |
| Paul Francis O'grady | Director | 7 Jul 2017 | 15 Jul 2019 | British | 41 years |
| Peter Sean Vernon | Director | 3 Nov 2010 | 31 Dec 2016 | British | 67 years |
| Rajesh Desai | Secretary | 2 Sept 2003 | 3 Nov 2010 | British | - |
| Richard Alexander Jefferies | Director | 6 Jan 2017 | 15 Jul 2019 | British | 63 years |
| Simon Geoffrey Harding-roots | Director | 28 Apr 2016 | 15 Jul 2019 | British | 58 years |
| Ulrike Schwarz-runer | Director | 1 Feb 2011 | 28 Apr 2016 | Austrian | 55 years |
| William Robert Bax | Director | 6 Jan 2017 | 1 Jun 2018 | British | 48 years |