| Alan Harcourt Craig | Director | 1 Jan 1994 | 7 Sept 2000 | British | 77 years |
| Alan Harcourt Craig | Director | 20 Jun 2001 | 12 Aug 2004 | British | 77 years |
| Alexander Macdonald | Director | 1 Jan 1995 | 7 Sept 2000 | British | 77 years |
| Allyn Byram Taylor | Director | 26 Sept 2007 | 6 Jun 2011 | United States | 78 years |
| Bruce Alexander Durning | Director | 1 Jan 1995 | 7 Sept 2000 | British | 80 years |
| Bryan George Harvey | Director | 30 Nov 2020 | 26 Sept 2022 | British | 57 years |
| Cameron Stuart Lindsay | Director | 1 Jan 1995 | 7 Sept 2000 | British | 81 years |
| Christopher Masters | Director | 1 Jun 2002 | 12 Aug 2004 | British | 79 years |
| David Baird | Director | 1 Jan 1996 | 7 Sept 2000 | British | 71 years |
| David Baird | Director | 20 Dec 2007 | 22 Jan 2016 | British | 71 years |
| David Fred Fawcett | Director | 1 Jan 1995 | 7 Sept 2000 | British | 79 years |
| David James Banks | Director | 1 Jan 1995 | 1 Jan 1998 | British | 89 years |
| David John Noakes | Director | 1 Jan 1995 | 7 Sept 2000 | British | 80 years |
| David Joseph Coultas | Director | 14 Mar 2018 | 9 Dec 2020 | British | 64 years |
| Gary Smith | Director | 1 Jan 1995 | 7 Sept 2000 | British | 82 years |
| Geoffrey Booth | Director | 9 Nov 1992 | 31 Dec 1993 | British | 93 years |
| Gordon Grier Thomson Masterton | Director | 1 Jan 1995 | 7 Sept 2000 | British | 72 years |
| Graham Kinder | Director | 9 Nov 1992 | 31 Dec 1995 | British | 95 years |
| Graham Roger Jones | Director | 29 Nov 2004 | 1 Jan 2012 | British | 78 years |
| Guy Douglas | Director | 30 Nov 2020 | 11 Aug 2021 | British | 45 years |
| Henry George Perfect | Director | 1 Jan 1994 | 31 Dec 2002 | British | 82 years |
| James Peter Millmore | Director | 1 Jan 1995 | 7 Sept 2000 | British | 80 years |
| John Conor Doyle | Director | 22 Oct 2013 | 7 Oct 2016 | Irish | 67 years |
| John Mclachlan | Director | 12 Aug 2004 | 29 Dec 2004 | British | 80 years |
| John Phillippo Atkins | Director | 1 Jan 1996 | 7 Sept 2000 | British | 80 years |
| John Warren Prosser | Director | 12 Aug 2004 | 8 Jan 2015 | American | 81 years |
| Jonathan R. Shattock | Director | 30 Nov 2016 | 30 Nov 2020 | British | 62 years |
| Kevin Christopher Berryman | Director | 15 Jan 2015 | 26 Apr 2017 | American | 67 years |
| Lesley Mary Samuel Knox | Director | 21 Jun 2000 | 12 Aug 2004 | British | 73 years |
| Mark Cubitt | Director | 1 Jan 2001 | 12 Aug 2004 | British | 63 years |
| Mark Cubitt | Director | 24 Jan 2006 | 12 Jan 2007 | British | 63 years |
| Michael John Higgins | Director | 12 Jan 2007 | 1 Jun 2011 | United States | 82 years |
| Michael Timothy Norris | Secretary | 12 Aug 2004 | 23 May 2018 | British | - |
| Michael Udovic | Secretary | 13 Apr 2011 | 1 Sept 2015 | - | - |
| Michael William Fleetwood | Director | 4 Jan 2007 | 25 Sept 2014 | British | 69 years |
| Morris James Murray | Director | 1 Jan 1995 | 7 Sept 2000 | British | 81 years |
| Morris James Murray | Director | 20 Jun 2001 | 12 Aug 2004 | British | 81 years |
| Norman Stevenson Mclean Berry | Director | 9 Nov 1992 | 31 Dec 1993 | British | 93 years |
| Patrick William Wingfield | Director | 1 Jan 1995 | 7 Sept 2000 | British | 79 years |
| Paul Gilbert Carter | Director | 1 Jan 1995 | 1 Jul 1997 | British | 83 years |
| Peter James Bailey Shakeshaft | Director | 21 Jun 2000 | 12 Aug 2004 | British | 79 years |
| Philip John Stassi | Director | 24 Jan 2006 | 26 Sept 2007 | American | 71 years |
| Rhona Mary Holman | Secretary | 10 Feb 2023 | 21 Aug 2023 | - | - |
| Robert Andrew Morgan Watkins | Director | 23 Jun 1997 | 1 Jul 1998 | British | 82 years |
| Robert Anthony Michael Irvin | Director | 7 Jun 2011 | 22 Oct 2013 | British | 68 years |
| Robert Hugh Clarke | Director | 1 Apr 1993 | 7 Sept 2000 | British | 80 years |
| Robert Moir Kennard | Director | 23 Jun 1997 | 7 Sept 2000 | British | 80 years |
| Robert Shepherd Duff | Director | 1 Jan 1995 | 7 Sept 2000 | British | 67 years |
| Robert Shepherd Duff | Director | 25 Mar 2009 | 17 Jan 2017 | British | 67 years |
| Ronald Macdonald Angus | Director | 9 Nov 1992 | 31 Dec 1994 | British | 92 years |
| Tejender Singh Chaudhary | Secretary | 23 May 2018 | 10 Feb 2023 | - | - |
| Thomas Alan Johnston | Director | 9 Nov 1992 | 31 Dec 1995 | British | 91 years |
| Thomas Alan Johnston | Secretary | 9 Nov 1992 | 31 Dec 1995 | British | - |
| Walter Charles Barber | Director | 12 Aug 2004 | 12 Jan 2007 | American | 85 years |
| William Clyde Markley | Secretary | 12 Aug 2004 | 13 Apr 2011 | American | - |
| William Gilchrist Mitchell | Director | 1 Jan 1995 | 4 Jan 2007 | British | 82 years |
| William Gilchrist Mitchell | Secretary | 1 Jan 1996 | 12 Aug 2004 | British | - |
| William John Cameron Broadfoot | Director | 12 Jan 2007 | 25 Oct 2007 | British | 72 years |
| William John Paterson | Director | 9 Nov 1992 | 31 Dec 1998 | British | 85 years |