| Caroline Janet Banszky | Director | 30 Aug 2002 | 17 Mar 2006 | British | 73 years |
| Caroline Janet Banszky | Director | 23 Sept 2010 | 31 Aug 2016 | British | 73 years |
| Christopher Charles Biddulph Duffett | Director | 5 May 1992 | 30 Aug 2002 | British | 83 years |
| Douglas Christopher Patrick Mcdougall | Director | 17 Oct 2000 | 17 Mar 2006 | British | 82 years |
| Ewen Cameron Stewart Macpherson | Director | 19 May 1998 | 3 Apr 2001 | British | 84 years |
| Foster Ferrier Harvey Charlton | Director | 5 May 1992 | 25 Apr 1995 | British | 103 years |
| Howard Clive Rumbelow | Director | 17 Nov 1992 | 19 Oct 1993 | British | 93 years |
| Hugh Daniel Osborne | Director | 5 May 1992 | 21 Apr 1998 | British | 99 years |
| John Alston Morrell | Director | 5 May 1992 | 21 Apr 1998 | British | 99 years |
| John Edwards | Director | 19 May 1998 | 23 May 2003 | British | 85 years |
| John Jeremy Mckinnell Potter | Director | 5 May 1992 | 30 Nov 1992 | British | 89 years |
| John Jeremy Mckinnell Potter | Secretary | 5 May 1992 | 17 Nov 1992 | British | - |
| John Kenneth Howell | Secretary | 17 Nov 1992 | 5 Sept 1997 | British | - |
| John Maxwell Kennedy | Director | 27 Jun 1995 | 28 Mar 2000 | British | 92 years |
| Kenneth William Ballard Inglis | Director | 3 Apr 2001 | 17 Mar 2006 | British | 83 years |
| Michael Andrew Caldicott | Director | 17 Sept 1996 | 5 Sept 1997 | British | 75 years |
| Michael Charles Adams | Director | 31 Aug 2016 | 22 Oct 2017 | British | 63 years |
| Peter Michael Skeggs | Director | 5 Sept 1997 | 23 May 2003 | British | 75 years |
| Raymond Percival St George Cazalet | Director | 5 May 1992 | 19 Oct 1993 | British | 95 years |
| Richard Forbes Thomas | Director | 17 Nov 1992 | 16 Feb 1993 | British | 82 years |
| Richard Forbes Thomas | Director | 15 Jun 1993 | 14 May 2004 | British | 82 years |
| Robert James Williams | Director | 19 Oct 1993 | 17 Mar 2006 | British | 78 years |