| Andrew Arthur William Harper | Director | 7 Feb 2000 | 31 Dec 2002 | British | 71 years |
| Andrew Arthur William Harper | Director | 27 Jun 2010 | 4 Apr 2011 | British | 71 years |
| Andrew Cleaves | Director | 31 Dec 2002 | 9 Jan 2003 | British | 62 years |
| Andrew Cleaves | Director | 22 Jan 2007 | 22 Jan 2007 | British | 62 years |
| Andrew Cleaves | Director | 22 Jan 2007 | 22 Jan 2007 | British | 62 years |
| Andrew Cleaves | Director | 20 May 2008 | 27 Jun 2010 | British | 62 years |
| Andrew Peter Stanton Lord | Director | 29 Jun 2020 | 18 May 2022 | British | 55 years |
| Andrew Pollins | Director | 3 Jun 2013 | 23 Oct 2017 | British | 58 years |
| Beth Anne West | Director | 24 Aug 2011 | 10 Feb 2012 | British | 56 years |
| Brian Appleton | Director | 28 Mar 2000 | 31 Dec 2002 | British | 94 years |
| Brian Daniel Sedar | Director | 1 Sept 2007 | 7 Jun 2010 | American | 69 years |
| Christopher Victor Fenton | Director | 13 Dec 2007 | 27 Jun 2010 | British | 63 years |
| Clare Wardle | Secretary | 27 Jan 2009 | 27 Jun 2010 | British | - |
| David Andrew Begg | Director | 1 Feb 2006 | 27 Jun 2010 | British | 69 years |
| David Emrys Hughes | Director | 23 Oct 2017 | 6 Dec 2019 | British | 55 years |
| David Gogo Waboso | Director | 3 Jun 2013 | 23 May 2016 | British | 69 years |
| Dean Kendal Finch | Director | 1 Jun 2009 | 10 Feb 2010 | British | 59 years |
| Denis Tunnicliffe | Director | 7 Feb 2000 | 30 Jun 2000 | British | 82 years |
| Diarmaid O'tuathail | Director | 20 May 2008 | 27 Jun 2010 | Irish | 63 years |
| Diarmaid O'tuathail | Director | 24 Aug 2011 | 31 May 2013 | Irish | 63 years |
| Elizabeth Noel Harwerth | Director | 1 Aug 2003 | 30 Apr 2008 | Us Citizen | 78 years |
| Esther Sharples | Director | 29 Jun 2020 | 11 Aug 2023 | British | 49 years |
| Fady Philip Bassily | Director | 21 Apr 2005 | 26 May 2006 | Usa | 79 years |
| Frances Low | Secretary | 7 Feb 2000 | 31 Dec 2002 | British | - |
| Frederick William Mackintosh | Director | 11 Jul 2000 | 31 Dec 2002 | British | 82 years |
| Geoffrey Donald Virrels | Director | 1 Feb 2011 | 30 Jun 2011 | British | 79 years |
| Graham Simon Lowe | Secretary | 31 Dec 2002 | 23 Oct 2003 | British | - |
| Howard Ernest Carter | Secretary | 27 Jun 2010 | 29 Sept 2023 | - | - |
| Ian Christopher Copeland | Director | 16 Jan 2006 | 1 Sept 2007 | British | 63 years |
| James Alexander Foulds | Director | 31 Dec 2002 | 4 Sept 2008 | British | 63 years |
| James Haynes | Director | 31 Mar 2003 | 16 Jan 2006 | American | 67 years |
| Jill Louise Collis | Director | 3 Jun 2013 | 6 Sept 2019 | British | 57 years |
| John James Hughes | Director | 7 Feb 2000 | 3 Aug 2000 | British | 79 years |
| John James Hughes | Director | 31 Dec 2001 | 31 Dec 2002 | British | 79 years |
| Jonathan Lamonte | Director | 4 Apr 2011 | 24 Dec 2012 | British | 66 years |
| Keith Cottrell | Director | 21 Apr 2005 | 13 Dec 2007 | British | 70 years |
| Lee Jones | Director | 1 Jul 2008 | 30 Nov 2012 | British | 71 years |
| Malcolm David Field | Director | 14 Feb 2003 | 20 Jan 2006 | British | 88 years |
| Malcolm Ross Snody | Director | 9 Jan 2003 | 31 Mar 2003 | Canadian | 85 years |
| Mark Wild | Director | 1 Sept 2016 | 2 Nov 2018 | British | 60 years |
| Martin Hughes Brown | Director | 9 Jan 2003 | 12 Jun 2006 | British | 72 years |
| Martin John Callaghan | Director | 21 Mar 2000 | 31 Dec 2002 | British | 69 years |
| Martin Patrick William Jones | Secretary | 27 Jun 2010 | 7 Aug 2015 | - | - |
| Michael William Tuke Brown | Director | 27 Jun 2010 | 1 Sept 2016 | British | 61 years |
| Nicole Ann Geoghegan | Secretary | 14 Jun 2005 | 10 Aug 2007 | Australian | - |
| Nigel Inns | Director | 31 Dec 2002 | 9 Jan 2003 | British | 61 years |
| Nigel Phillip Lancaster | Director | 31 Dec 2002 | 9 Jan 2003 | British | 72 years |
| Philip Hufton | Director | 14 Dec 2012 | 2 Jan 2015 | British | 68 years |
| Sarah Anne Atkins | Director | 1 Feb 2011 | 29 Jul 2011 | British | 70 years |
| Sarah Anne Atkins | Director | 1 Jul 2014 | 30 Sept 2016 | British | 70 years |
| Simon Patrick Butcher | Director | 7 Feb 2000 | 31 Dec 2001 | British | 58 years |
| Stephen Glaister | Director | 27 Jan 2009 | 27 Jun 2010 | British | 79 years |
| Stephen Glynn Hurrell | Director | 31 Dec 2002 | 30 Sept 2010 | British | 68 years |
| Stephen Glynn Hurrell | Secretary | 23 Oct 2003 | 14 Jun 2005 | British | - |
| Stephen Glynn Hurrell | Secretary | 10 Aug 2007 | 27 Jan 2009 | British | - |
| Stephen Hedley Peat | Director | 9 Jan 2003 | 1 Jul 2008 | British | 70 years |
| Stephen Mark Griffiths | Director | 15 Jun 2015 | 30 Mar 2017 | British | 59 years |
| Stewart Mills | Director | 1 Dec 2012 | 12 Feb 2014 | British | 62 years |
| Stuart Anthony James Harvey | Director | 24 Aug 2011 | 31 May 2013 | British | 60 years |
| Stuart Ian Munro | Director | 24 Aug 2011 | 31 May 2013 | British | 58 years |
| Tanya Louise Coff | Director | 23 Oct 2017 | 20 Nov 2020 | British | 63 years |
| Terence Keith Morgan | Director | 31 Dec 2002 | 1 Jun 2009 | British | 77 years |
| Thomas Michael Mccarthy | Director | 1 Jun 2006 | 27 Jun 2010 | American | 68 years |
| Wayne Chin | Director | 7 Jun 2010 | 27 Jun 2010 | American | 68 years |