| Adam Paul Rutherford | Secretary | 27 Oct 1998 | 14 Jan 2000 | British | - |
| Alan Christopher Wren | Director | 9 May 1992 | 21 Nov 1992 | British | 78 years |
| Alan Edward Smith | Director | 8 Nov 2000 | 26 Feb 2001 | British | 70 years |
| Andrew Tamlyn | Director | 14 May 1998 | 30 Jun 1999 | British | 68 years |
| Angela Sigley | Secretary | 14 Jan 2000 | 20 Mar 2000 | British | - |
| Anthony John Ashplant | Director | 14 Dec 1999 | 15 Nov 2001 | British | 72 years |
| Carol Ann Richmond | Director | 8 Nov 1999 | 3 Dec 2001 | British | 63 years |
| Christopher Ian Jackson | Director | 31 Dec 2003 | 30 Apr 2013 | British | 60 years |
| David Kenneth Watson | Director | 28 Sept 1999 | 15 Nov 2001 | British | 67 years |
| David William Dibben | Director | 15 Nov 2001 | 31 Oct 2004 | British | 66 years |
| Deborah Jacqueline Carter | Director | 24 Feb 2005 | 31 Oct 2008 | British | 62 years |
| Fiona Jane Molloy | Secretary | 26 Jun 2002 | 13 Jan 2006 | British | - |
| Gary Anthony Hitchens | Director | 15 Nov 2001 | 23 Sept 2002 | British | 68 years |
| Gary Paul John Shaughnessy | Director | 22 Nov 2001 | 12 Jun 2008 | British | 60 years |
| Graham Williamson Macdowall | Director | 15 Nov 2001 | 4 Jan 2019 | British | 63 years |
| Hugh Royston Jenkins | Director | 9 May 1992 | 31 Dec 1995 | British | 93 years |
| John Kenneth Elbourne | Director | 27 Mar 1997 | 14 May 1998 | British | 82 years |
| John Richard Talbot | Director | 15 Nov 2001 | 30 Jun 2013 | British | 75 years |
| John Tomlins | Director | 30 Dec 1996 | 6 Jun 1997 | British | 78 years |
| John Warburton | Director | 28 Jun 2011 | 17 Nov 2015 | British | 67 years |
| Jonathan Peter Mcclelland | Secretary | 8 Jan 2001 | 26 Jun 2002 | British | - |
| Keith Leonard Bedell Pearce | Director | 9 May 1992 | 6 Apr 1997 | British | 80 years |
| Kerryn Lynn Macdonald | Secretary | 30 Apr 2004 | 9 Mar 2005 | British | - |
| Lavinia Ulrike Darby | Director | 24 Sept 2008 | 23 Dec 2011 | British | 57 years |
| Leeroy Robert Tustain | Director | 13 Feb 2019 | 26 Jun 2019 | British | 56 years |
| Leslie John Scrine | Director | 8 Apr 2005 | 30 Apr 2012 | British | 68 years |
| Maria Luisa Cassoni | Director | 3 Jan 1996 | 14 May 1998 | British | 75 years |
| Mark Alan Thompson | Director | 14 Dec 1999 | 16 Jun 2000 | British | 65 years |
| Mark Alan Thompson | Director | 18 May 2010 | 10 Dec 2010 | British | 65 years |
| Martin Lewis | Director | 28 Sept 1999 | 13 Jun 2016 | British | 70 years |
| Nicholas Andrew Courtnay Smith | Director | 1 Oct 2002 | 19 Jan 2004 | British | 76 years |
| Nicholas Ben-gough Alliston | Director | 9 Jun 1997 | 6 Nov 1997 | British | 80 years |
| Nigel Stephen Boyling | Director | 30 Jun 1999 | 15 Nov 2001 | British | 70 years |
| Richard Julian Field | Director | 2 Sept 2002 | 8 May 2003 | British | 63 years |
| Robert Charles Trant Higginbotham | Director | 14 May 1998 | 30 Jun 1999 | British | 59 years |
| Robert Walker | Secretary | 9 May 1992 | 27 Oct 1998 | British | - |
| Rodney Malcolm Cook | Director | 8 Jan 2004 | 13 Jun 2006 | British/australian | 69 years |
| Roger Patrick Flynn | Director | 11 Oct 1999 | 20 Sept 2000 | British | 64 years |
| Sean Andrew Fitzgerald | Director | 16 Mar 2020 | 31 Dec 2024 | British | 61 years |
| Sean Tompkins | Director | 8 Nov 2000 | 31 Oct 2001 | British | 60 years |
| Stephen James Cook | Director | 14 May 1998 | 30 Jul 1999 | British | 75 years |
| Susan Doreen Windridge | Secretary | 20 Mar 2000 | 8 Jan 2001 | British | - |
| Symon Elliott | Director | 1 Mar 1993 | 28 Feb 1995 | British | 69 years |
| Trevor Cheal | Director | 5 Feb 2009 | 31 Mar 2010 | British | 62 years |
| William Allan Donaldson | Director | 14 May 1998 | 21 Dec 1998 | British | 62 years |
| William George Vasilieff | Director | 8 Nov 2000 | 30 Apr 2001 | British | 71 years |
| William John Nott | Director | 27 Mar 2006 | 31 Dec 2017 | British | 64 years |