| Antony Michael Rawson Lumby | Director | 26 Jul 1991 | 31 May 1995 | British | 82 years |
| Arthur Guy Galbraith | Director | 26 Jul 1991 | 31 May 1995 | British | 78 years |
| Arthur Mark Dearsley | Director | 3 Sept 2007 | 13 Feb 2009 | British | 64 years |
| Aubrey John Adams | Director | 26 Jul 1991 | 7 May 2008 | British | 76 years |
| Charles Ian James Sanderson | Director | N/A | 30 Apr 1999 | British | 74 years |
| Charles Senff Mcveigh Iii | Director | 1 Aug 2000 | 8 May 2019 | British | 83 years |
| Christina Elspeth Hildrey | Secretary | 6 Nov 1997 | 1 Jul 2001 | British | - |
| Clare Jacqueline Latham | Secretary | 26 Jul 1991 | 6 Nov 1997 | British | - |
| Clare Margaret Hollingsworth | Director | 2 Apr 2012 | 12 May 2014 | British | 65 years |
| David Gordon Eastlake | Director | 7 Apr 2000 | 13 Mar 2001 | British | 62 years |
| David John Alastair Craig | Director | 6 Sept 1995 | 30 Jun 2002 | British | 78 years |
| David Stanley Davies | Director | 23 Oct 1997 | 20 Jun 2000 | British | 82 years |
| David Wong | Director | 7 Apr 2000 | 30 Jun 2003 | British | 75 years |
| Derek Peter Hornby | Director | 26 Jul 1991 | 31 Jan 1995 | British | 95 years |
| Derek Ray Mcclain | Director | 28 Aug 2002 | 20 Dec 2006 | American | 70 years |
| Edward Stevenson Belcher | Director | 1 Mar 2001 | 28 Aug 2002 | Usa | 67 years |
| Elizabeth Anne Hewitt | Director | 24 Jun 2014 | 8 May 2019 | British | 69 years |
| Geoffrey Neil Van Cutsem | Director | 26 Jul 1991 | 7 Sept 2000 | British | 81 years |
| George Patrick Francis Inge | Director | 26 Jul 1991 | 31 May 1995 | British | 84 years |
| Godfrey Alexander Blott | Director | 23 Oct 1997 | 7 Apr 2000 | British | 69 years |
| Ian Esplin Stewart | Director | 26 Jul 1991 | 31 May 1995 | British | 75 years |
| James Fitzroy Dean | Director | 26 Jul 1991 | 30 Apr 1999 | British | 71 years |
| James Hardy Marland | Director | 26 Jul 1991 | 31 May 1995 | British | 74 years |
| Jane Fields Wicker Miurin | Director | 27 Jun 2002 | 5 May 2010 | American British | 67 years |
| Jeremy Charles Helsby | Director | 1 May 1999 | 31 Dec 2018 | British | 70 years |
| Jeremy David Aitchison | Director | 26 Jul 1991 | 20 Aug 1993 | British | 66 years |
| Justin Anthony Crofts Roberts | Director | 9 Sept 1993 | 31 Dec 2000 | British | 78 years |
| Leslie Alan Jordan | Director | 26 Jul 1991 | 30 Apr 1993 | British | 95 years |
| Martin David Angle | Director | 2 Jan 2007 | 11 May 2016 | British | 75 years |
| Michael John Anthony Healy | Director | 7 Apr 2000 | 13 Mar 2001 | British | 65 years |
| Michaela Frances East | Secretary | 31 Oct 2006 | 9 May 2007 | British | - |
| Nicholas Eustace Haddon Ferguson | Director | 26 Jan 2016 | 31 Dec 2023 | British | 77 years |
| Paul Duncan Kentish | Director | 26 Jul 1991 | 31 May 1995 | British | 73 years |
| Peter Alan Smith | Director | 24 May 2004 | 11 May 2016 | British | 79 years |
| Peter Wilson | Director | 26 Jul 1991 | 31 May 1995 | British | 80 years |
| Pryor Blackwell | Director | 30 Jun 2000 | 28 Feb 2001 | American | 64 years |
| Richard Bardrick Ray | Secretary | 9 May 2007 | 15 May 2008 | British | - |
| Richard Wilson Jewson | Director | 1 May 1994 | 31 Oct 2004 | British | 81 years |
| Robert Alexander James Mckellar | Director | 1 Jun 2000 | 18 Jan 2010 | British | 66 years |
| Robert Lewis Dean | Director | 26 Jul 1991 | 30 Apr 1999 | British | 85 years |
| Robert Renny St John Barkshire | Director | 26 Jul 1991 | 6 Sept 1995 | British | 90 years |
| Rupert Hugo Wynne Robson | Director | 23 Jun 2015 | 12 May 2021 | British | 64 years |
| Rupert Owen Sebag-montefiore | Director | 1 May 1995 | 18 Jan 2010 | British | 72 years |
| Ruth Tessa Michelson-carr | Secretary | 9 May 2003 | 14 Jul 2008 | British | - |
| Simon Richard Hope | Director | 1 May 1999 | 18 Jan 2010 | British | 61 years |
| Timothy Charles William Ingram | Director | 27 Jun 2002 | 9 May 2012 | British | 78 years |
| Timothy George Freshwater | Director | 1 Jan 2012 | 31 Dec 2021 | British | 81 years |
| Tina Lynne Cutler | Secretary | 1 Jul 2001 | 24 Feb 2004 | British | - |
| Victoria Maureen Mitchell | Director | 26 Jul 1991 | 31 Dec 2000 | British | 75 years |
| William Concannon | Director | 30 Jun 2000 | 20 Dec 2006 | American | 70 years |