| Alan Paul Busson | Secretary | 8 Mar 1999 | 7 Sept 1999 | British | - |
| Alan Paul Busson | Secretary | 30 Sept 2000 | 28 Sept 2001 | British | - |
| Anthony Talbot Heffernan James Considine | Director | 10 Jul 2000 | 1 Dec 2002 | Irish | 72 years |
| Bernt Erland Magnusson | Director | 1 Jan 1994 | 10 Jul 2000 | Swedish | 85 years |
| Brian Hardy | Director | 2 Jul 1990 | 1 Jun 1990 | British | 84 years |
| Brian Hardy | Director | 1 Jun 1991 | 10 Jul 2000 | British | 84 years |
| Brian Michael Puffer | Director | 8 Mar 2010 | 31 Dec 2018 | British,american | 57 years |
| David Andrew James Baldry | Director | 10 Jul 2000 | 15 Sept 2006 | British | 71 years |
| David Charles Goosey | Director | 1 Apr 2014 | 1 Apr 2015 | British | 64 years |
| David William Dunlop | Secretary | 31 Aug 1991 | 17 Jan 1994 | British | - |
| Francis William Michael Starkie | Director | 1 Aug 2007 | 30 Sept 2009 | British | 77 years |
| Frederic Jean Baudry | Director | 15 Sept 2006 | 18 Mar 2009 | French | 61 years |
| Geoffrey Cecil Butcher | Director | 2 Jun 1989 | 14 May 1993 | British | 103 years |
| Gerald Digby Torrington Owen | Director | 27 May 1992 | 8 Jun 1995 | British | 91 years |
| Gerald Michael Nolan Corbett | Director | 4 Dec 1998 | 10 Jul 2000 | British | 75 years |
| Helen Mccabe | Director | 16 Jun 2021 | 30 Jun 2023 | British | 57 years |
| Hugh Salisbury Mellor | Director | 22 Jun 1993 | 23 May 1997 | British | 90 years |
| Iain George Dobbie | Director | 7 Jun 1989 | 21 May 1999 | British | 89 years |
| James Robert Provan Pike | Director | 1 Feb 1998 | 30 Jun 2001 | British | 71 years |
| Jeremy Tardrew Cook | Director | 1 Nov 2002 | 1 Jul 2005 | British | 76 years |
| John Brian Jones | Secretary | 2 Jun 1989 | 31 Aug 1991 | British | - |
| John Greville Griffiths | Director | 2 Jul 1990 | 1 Jun 1990 | British | 91 years |
| John Greville Griffiths | Director | 1 Jun 1991 | 27 May 1992 | British | 91 years |
| John Henry Ellicock | Director | 2 Jun 1989 | 22 May 1998 | British | 80 years |
| John Joseph Carey | Director | 1 Jun 2010 | 1 Apr 2014 | Irish,american | 64 years |
| John Newcombe Maltby | Director | 2 Jun 1989 | 17 Jul 1990 | British | 98 years |
| John Stuart Briggs | Director | 10 Jul 2000 | 1 Mar 2004 | British | 80 years |
| Jonathan Michael Fry | Director | 2 Jun 1989 | 10 Jul 2000 | British | 89 years |
| Kevin Lee James | Director | 1 Dec 2002 | 15 Sept 2006 | American | 69 years |
| Lawrence Mcallister Urquhart | Director | 2 Jun 1989 | 21 May 1999 | British | 91 years |
| Luc Bardin | Director | 30 Dec 2000 | 1 Dec 2001 | French | 69 years |
| Lynn Paul Waterman | Director | 1 Aug 2009 | 1 Jun 2010 | British | 62 years |
| Lynn Paul Waterman | Director | 22 Jul 2013 | 31 Dec 2015 | American | 62 years |
| Mehmet Tufan Erginbilgic | Director | 15 Sept 2006 | 5 Nov 2007 | Turkish | 67 years |
| Michael Bailey Dearden | Director | 8 Jun 1995 | 30 Dec 2000 | British | 84 years |
| Michael Cooper | Director | 2 Jun 1989 | 30 Sept 1991 | British | 89 years |
| Michael John O'sullivan | Director | 31 Dec 2018 | 7 May 2021 | British | 62 years |
| Michael Johnson | Director | 1 Jul 2005 | 22 Jul 2013 | British | 72 years |
| Michael Johnson | Director | 30 Dec 2000 | 1 Dec 2001 | British | 72 years |
| Paolo Scaroni | Director | 24 Jul 1998 | 10 Jul 2000 | Italian | 80 years |
| Paul Ian Winton Turner | Director | 1 Apr 2015 | 1 Nov 2017 | British | 63 years |
| Peter Johan Jansen | Director | 22 Jun 1993 | 19 Jun 1998 | Dutch | 86 years |
| Peter Muir Elliott | Secretary | 7 Sept 1999 | 30 Sept 2000 | British | - |
| Philip Robert Sutherland Howie | Secretary | 17 Jan 1994 | 8 Mar 1999 | British | - |
| Ralph Rex Hewins | Director | 6 Dec 2007 | 1 Sept 2016 | British | 63 years |
| Rebecca Jayne Wright | Secretary | 12 Apr 2001 | 30 Jun 2010 | Other | - |
| Roger Christopher Harrington | Director | 1 Oct 2009 | 8 Mar 2010 | British | 60 years |
| Roger Norman Alexander Wood | Director | 2 Jun 1989 | 29 Jun 1990 | British | 79 years |
| Roger Norman Alexander Wood | Director | 1 Jun 1990 | 1 Jun 1991 | British | 79 years |
| Roland Clark Shaw | Director | 2 Jun 1989 | 8 May 1992 | American | 105 years |
| Rosemary Warnock | Director | 1 Mar 2004 | 1 Jul 2005 | Australian | 79 years |
| Steven Mather Wright | Director | 1 Jul 2005 | 1 Aug 2007 | American | 70 years |
| Timothy Edwin Paul Stevenson | Director | 4 Mar 1993 | 10 Jul 2000 | British | 78 years |
| Udayan Sen | Director | 1 Dec 2021 | 1 Apr 2025 | British | 58 years |
| Yasin Stanley Ali | Secretary | 12 Apr 2001 | 30 Jun 2010 | - | - |