| Andreas Gossman | Director | 1 Jun 1999 | 26 Feb 2001 | German | 65 years |
| Anya Marjorie O'reilly | Director | 8 Nov 2013 | 15 Aug 2014 | British | 52 years |
| Brian James Duffin | Director | 14 Dec 1995 | 31 Mar 2007 | British | 71 years |
| Christopher Brian Cormack | Director | 6 Dec 1999 | 7 Dec 2004 | British | 67 years |
| David Craig Dunn | Director | 18 Dec 1995 | 7 May 1996 | British | 81 years |
| David Craig Dunn | Secretary | 14 Dec 1995 | 1 Jul 2001 | British | - |
| David Quinnell Kneeshaw | Director | 18 Dec 2003 | 8 Nov 2013 | British | 69 years |
| Ewan Farquharson Smith | Director | 7 May 1996 | 6 Dec 1999 | British | 63 years |
| George Malcolm Murray | Director | 30 Jan 1996 | 1 Jan 1999 | British | 89 years |
| Hilary Anne Staples | Director | 18 Jul 2016 | 21 Apr 2017 | British | 55 years |
| Iain Maury Campbell Meiklejohn | Nominee Director | 20 Apr 1995 | 14 Dec 1995 | British | 72 years |
| Iain Maury Campbell Meiklejohn | Nominee Secretary | 20 Apr 1995 | 14 Dec 1995 | British | - |
| James Gilchrist | Director | 1 Jan 1999 | 1 Jul 2003 | British | 84 years |
| James Robert Will | Nominee Director | 20 Apr 1995 | 14 Dec 1995 | British | 71 years |
| John Gerard Allison | Director | 5 Feb 1996 | 1 Sept 2005 | British | 77 years |
| John Vincent Deane | Director | 1 Apr 2007 | 31 Jul 2012 | British | 68 years |
| Keith Ronald Bayliss | Director | 5 Feb 1996 | 2 Jul 2002 | British | 72 years |
| Kerr Luscombe | Director | 31 Jul 2012 | 14 May 2014 | British | 61 years |
| Michael Eric Hicks | Director | 17 May 1999 | 2 Dec 2003 | British | 70 years |
| Michael John Richardson | Director | 5 Feb 1996 | 17 Jun 1998 | British | 84 years |
| Michael John Yardley | Director | 4 Oct 2001 | 1 Jun 2004 | British | 70 years |
| Michelle Anne Hill | Director | 1 Oct 2017 | 30 Apr 2019 | British | 49 years |
| Murray John Ross | Secretary | 4 Sept 2001 | 28 Jun 2007 | British | - |
| Paul Frederick Thomas Langton | Director | 1 Jun 2004 | 31 Oct 2007 | British | 61 years |
| Richard William May | Director | 19 Feb 1996 | 2 Jun 2000 | British | 75 years |
| Robert James Griffin | Director | 26 Feb 2001 | 29 Jun 2001 | British | 73 years |
| Ruaridh Mackenzie Budge | Director | 14 Dec 1995 | 31 Dec 2002 | British | 78 years |
| Shingirai Thaddeus Nyahasha | Director | 15 Aug 2014 | 22 Jul 2016 | British | 52 years |
| Simon Colin Mitchley | Director | 9 Mar 2015 | 31 Jul 2016 | British | 57 years |
| Thomas Mackenzie Ross | Director | 1 Jun 1999 | 1 Jul 2001 | British | 82 years |
| Timothy Walter Harris | Director | 18 Jul 2016 | 6 Nov 2018 | British | 57 years |
| William Berry | Director | 30 Jan 1996 | 2 Mar 1999 | British | 87 years |