| Adrian Peter Harrison Thomas | Director | 20 Oct 2005 | 17 Jan 2006 | British | 64 years |
| Alastair Murdoch Mcintyre Mccrae | Director | 28 Feb 1997 | 24 Feb 2000 | British | 74 years |
| Anthony Francis Lochery | Director | 22 Dec 2008 | 17 Jul 2009 | British | 65 years |
| Archibald Alexander Rhodes | Director | 27 Mar 2016 | 16 Aug 2019 | American | 66 years |
| Archibald Alexander Rhodes | Secretary | 27 Mar 2016 | 16 Aug 2019 | - | - |
| Bruce Thorn | Director | 27 Mar 2016 | 31 Aug 2018 | American | 58 years |
| Charles Antony Lawrence Skinner | Director | 14 Dec 2007 | 28 Dec 2007 | British | 65 years |
| David Anthony Watson | Director | 30 Apr 2002 | 17 Jan 2006 | British | 68 years |
| David Edwab | Director | 6 Aug 2010 | 27 Mar 2016 | American | 71 years |
| David Gawler | Director | 10 Aug 1999 | 24 Feb 2000 | South African | 86 years |
| David Robert Toon | Director | 6 Oct 1992 | 1 Dec 2006 | United Kingdom | 64 years |
| Diana Wilson | Director | 6 Aug 2010 | 27 Mar 2016 | American | 77 years |
| Douglas Ewert | Director | 6 Aug 2010 | 30 Sept 2018 | American | 62 years |
| Edward Anthony Shannon | Director | 27 Feb 2004 | 27 Jun 2004 | British | 69 years |
| Edwin Charles Longfellow | Secretary | 5 Oct 2000 | 30 Apr 2001 | British | - |
| Gary Andrew Collis | Director | 11 Jan 1999 | 17 Jan 2006 | British | 59 years |
| Gary William Holmes | Director | 6 Oct 1992 | 8 May 2003 | British | 74 years |
| Gary William Holmes | Secretary | 30 Apr 2001 | 8 May 2003 | British | - |
| Gary William Holmes | Secretary | 30 Apr 2001 | 9 Feb 2004 | British | - |
| Graham Pearson | Director | 9 Feb 2004 | 17 Jan 2006 | British | 54 years |
| Graham Pearson | Secretary | 9 Feb 2004 | 17 Jan 2006 | British | - |
| Jack Calandra | Director | 17 Sept 2018 | 16 Aug 2019 | American | 58 years |
| Jack Calandra | Director | 17 Sept 2018 | 5 Mar 2019 | American | 28 years |
| James Henry Wilkinson | Director | 24 Jun 2005 | 31 Aug 2007 | British | 59 years |
| John Andrew Talbot | Director | 8 Jan 2008 | 11 Apr 2008 | British | 76 years |
| John Ellis Jackson | Director | 22 May 1997 | 16 Jul 1998 | British | 78 years |
| John Joseph Vareldzis | Director | 6 Dec 2004 | 17 Jan 2006 | British | 53 years |
| Jon Kimmins | Director | 28 Aug 2014 | 3 Jan 2017 | American | 68 years |
| Keith Peter Brown | Director | 6 Oct 1992 | 11 May 1998 | British | 79 years |
| Kevin John Mayes | Director | 30 Apr 2002 | 9 Feb 2004 | British | 71 years |
| Kevin John Mayes | Director | N/A | 6 Oct 1993 | British | 71 years |
| Kirk Mark Ehrlich | Director | 30 Nov 2020 | 29 Jul 2022 | British | 62 years |
| Martin John Lyne | Director | 16 Aug 2019 | 31 Jul 2021 | British | 62 years |
| Michael Alan Sutton | Director | 24 Feb 2000 | 30 Apr 2001 | British | 75 years |
| Michael Conlon | Secretary | 6 Aug 2010 | 27 Mar 2016 | British | - |
| Michael Conlon | Director | 28 Aug 2014 | 27 Mar 2016 | American | 79 years |
| Morgan Edward Atherton | Director | 16 Aug 2019 | 30 Sept 2021 | British | 57 years |
| Neill Davis | Director | 6 Aug 2010 | 31 Jul 2012 | United States | 69 years |
| Patrick Maltby | Director | 1 Oct 1996 | 21 Jan 2000 | British | 73 years |
| Peter Michael Robinson | Director | 24 Feb 2000 | 25 Nov 2002 | British | 79 years |
| Raymond Broome | Director | 18 Oct 1993 | 17 Jan 2006 | British | 79 years |
| Richard Barrett Pearson | Director | 17 Jan 2006 | 6 Aug 2010 | British | 68 years |
| Richard Barrett Pearson | Secretary | 17 Jan 2006 | 6 Aug 2010 | British | - |
| Richard Guy Frederick Zerny | Director | 24 Feb 2000 | 30 Apr 2002 | British | 81 years |
| Richard John Meyers | Director | 6 Oct 1992 | 22 May 1997 | British | 79 years |
| Robert Careless | Director | 10 Aug 1999 | 7 Apr 2000 | British | 72 years |
| Robert Careless | Secretary | 6 Oct 1992 | 15 Sept 2000 | British | - |
| Roger Graham Williams | Director | 22 Dec 2008 | 6 Aug 2010 | British | 61 years |
| Simon Nicholas Inchley | Director | 6 Aug 2010 | 28 Aug 2014 | British | 62 years |
| Simon Ralph Hughes | Director | 17 Jan 2006 | 31 Jan 2014 | British | 67 years |
| Stephen George Barney | Director | 6 Oct 1992 | 28 Feb 1997 | British | 75 years |
| Stephen Kenneth Hawkins | Director | 27 Feb 2004 | 17 Jan 2006 | British | 63 years |
| Stuart William Graham | Director | 20 Jan 2009 | 30 Jun 2020 | British | 71 years |
| Yvonne May Monaghan | Director | 24 Feb 2000 | 30 Apr 2001 | British | 67 years |
| Yvonne May Monaghan | Director | 24 Jun 2005 | 11 Apr 2008 | British | 67 years |
| Yvonne May Monaghan | Secretary | 15 Sept 2000 | 5 Oct 2000 | British | - |