| Caroline Hinchliffe | Secretary | 1 Jul 2008 | 31 Dec 2009 | British | - |
| Caroline Mary Tolhurst | Secretary | 3 Jul 2002 | 1 Jul 2008 | British | - |
| Christopher James Jukes | Director | 11 Mar 2013 | 31 Oct 2013 | British | 48 years |
| Christopher Millard | Director | 8 Jul 2011 | 10 Apr 2012 | British | 57 years |
| Geoffrey Harcroft Wright | Director | 12 Dec 2000 | 3 Jul 2002 | British | 83 years |
| Iain Farlane Sim Harris | Director | 12 Dec 2000 | 3 Jul 2002 | British | 64 years |
| John Andrew Bywater | Director | 12 Dec 2000 | 3 Jul 2002 | British | 79 years |
| John Andrew William Dodds | Director | 12 Dec 2000 | 24 Aug 2001 | British | 70 years |
| John Francis German | Director | 10 Apr 2012 | 10 Oct 2012 | British | 62 years |
| Katharine Emma Robinson | Secretary | 31 Dec 2009 | 4 Aug 2010 | - | - |
| Leonie Watson-brock | Secretary | 4 Aug 2010 | 20 Sept 2013 | - | - |
| Mervyn Howard | Director | 8 Sept 2003 | 11 Mar 2013 | British | 67 years |
| Michael John Baker | Director | 1 Aug 2001 | 3 Jul 2002 | British | 63 years |
| Nicholas Alan Scott Hardie | Director | 1 Aug 2001 | 3 Jul 2002 | British | 71 years |
| Nicholas Oliver Preston | Director | 10 Oct 2012 | 31 Jan 2016 | British | 58 years |
| Nicholas Richard Scarles | Director | 19 Jan 2005 | 24 Jul 2006 | British | 64 years |
| Peter William Beaumont Cole | Director | 12 Dec 2000 | 3 Jul 2002 | British | 67 years |
| Raymond Charles Williams | Director | 3 Jul 2002 | 19 Jan 2005 | British | 73 years |
| Richard Brian Mallett | Director | 19 Jan 2005 | 11 Mar 2013 | British | 59 years |
| Richard Brian Mallett | Director | 19 Jul 2013 | 5 Aug 2013 | British | 59 years |
| Richard Brian Mallett | Director | 19 Aug 2013 | 27 Aug 2013 | British | 59 years |
| Richard Simon Handley | Director | 3 Jul 2002 | 19 Jan 2005 | British | 72 years |
| Robert Richard Davis | Director | 24 Jul 2006 | 26 Sept 2019 | British | 59 years |
| Sarah-jane Curtis | Director | 3 Jul 2002 | 13 Sept 2002 | British | 63 years |
| Scott Mark Rowland | Director | 8 Jul 2011 | 10 Oct 2012 | British | 62 years |
| Sebastien Dominique Hyest | Director | 11 Mar 2013 | 26 Sept 2019 | French | 53 years |
| Stephen Howard Rhodes Musgrave | Director | 3 Jul 2002 | 19 Jan 2005 | British | 73 years |
| Stuart John Haydon | Secretary | 12 Dec 2000 | 3 Jul 2002 | British | - |
| Stuart Robert Hartley Beevor | Director | 19 Jan 2005 | 17 Mar 2011 | British | 69 years |
| Timothy Alan Dumbreck | Director | 9 Dec 2005 | 1 Sept 2006 | British | 64 years |
| Virginia Duncan | Secretary | 20 Sept 2013 | 19 Feb 2014 | - | - |
| William John Ashworth Bullough | Director | 3 Jul 2002 | 8 Sept 2003 | British | 76 years |