| Adrian Thomas Grace | Director | 16 Jun 2010 | 23 Nov 2011 | British | 63 years |
| Andrew Seaton Birrell | Director | 2 Apr 2012 | 6 Jan 2016 | British,south African | 57 years |
| Brid Mary Meaney | Director | 30 Jun 2023 | 23 Aug 2024 | Irish | 52 years |
| Caroline Mary Burton | Director | 31 May 1992 | 31 Jul 1999 | British | 76 years |
| Christopher William Chapman | Director | 23 Nov 2011 | 5 Mar 2012 | United States | 65 years |
| Clare Bousfield | Director | 31 Mar 2011 | 23 Nov 2011 | British | 58 years |
| David Aiken Elston | Secretary | 1 Jul 2010 | 24 Sept 2010 | British | - |
| Ian Bruce Owen | Director | 23 Nov 2011 | 6 Jan 2016 | British | 73 years |
| Ian David Lea Richardson | Director | 1 Aug 1999 | 7 Oct 1999 | British | 81 years |
| Ian Gordon Young | Secretary | 7 Oct 1999 | 13 Aug 2009 | British | - |
| Ian William James Patrick | Director | 6 Jan 2016 | 28 May 2020 | British | 59 years |
| James Kenneth Mackenzie | Secretary | 31 Mar 2011 | 23 Nov 2011 | British | - |
| John Reginald William Clayton | Director | 31 May 1992 | 7 Oct 1999 | British | 76 years |
| John Reginald William Clayton | Secretary | 3 Jul 1995 | 7 Oct 1999 | British | - |
| Jonathan Charles Naylor | Director | 31 May 1992 | 31 May 1995 | British | 70 years |
| Jonathan Yates | Director | 1 Mar 2012 | 7 May 2015 | British | 65 years |
| Julian Victor Frow Roberts | Director | 1 Aug 1999 | 7 Oct 1999 | British | 69 years |
| Lorraine May Blair | Secretary | 5 Sept 2013 | 8 May 2015 | British | - |
| Martyn Baker | Director | 31 May 1992 | 31 Jan 1997 | British | 80 years |
| Matthew Hilmar Cuhls | Director | 6 Jan 2016 | 30 Jun 2023 | British | 52 years |
| Michael Charles Woodcock | Director | 6 Jan 2016 | 30 Jun 2023 | British | 58 years |
| Otto Thoresen | Director | 7 Oct 1999 | 31 Mar 2011 | British | 70 years |
| Paul Shakespeare | Secretary | 6 Jan 2016 | 22 Jul 2020 | - | - |
| Richard Clive Lewis-jones | Director | 31 May 1995 | 7 Oct 1999 | British | 78 years |
| Robert James Wilson Shaw | Secretary | 31 May 1992 | 3 Jul 1995 | British | - |
| Roy Patrick | Director | 7 Oct 1999 | 28 Apr 2006 | British | 76 years |
| Simon Anthony John Davis | Secretary | 23 Nov 2011 | 5 Sept 2013 | British | - |
| Stephen James Groves | Director | 23 Nov 2011 | 6 Jan 2016 | British | 51 years |
| Stuart Turner Brown | Secretary | 8 May 2015 | 6 Jan 2016 | - | - |
