| Adam Paul Butcher | Director | 12 Aug 2024 | 31 Jul 2025 | British | 50 years |
| Alan Cockshaw | Director | 8 Jun 1991 | 14 Jul 1997 | British | 89 years |
| Alison Yapp | Secretary | 1 Dec 2012 | 7 Oct 2017 | - | - |
| Andrew Stuart Mclean | Director | 9 Dec 2019 | 12 Aug 2024 | British | 56 years |
| Carl Anthony Chatfield | Director | 7 Oct 2017 | 9 Dec 2019 | British | 62 years |
| Carlos Alberto Riva | Director | 1 Aug 2003 | 11 Apr 2005 | American | 73 years |
| Charles Ian Bateman | Director | 8 Jun 1991 | 9 Jun 1993 | British | 91 years |
| Christopher Laskey Fidler | Secretary | 1 Oct 2010 | 12 Dec 2011 | - | - |
| Christopher Laskey Fidler | Secretary | 1 Jan 2012 | 1 Dec 2012 | - | - |
| Colin Richard Day | Director | 14 Oct 2010 | 7 Oct 2017 | British | 71 years |
| David Robson | Director | 14 Aug 1991 | 31 Jul 2003 | British | 81 years |
| Dennis Clark | Director | 8 Jun 1991 | 30 Aug 1994 | British | 79 years |
| Eleanor Bronwen Evans | Secretary | 15 Mar 2011 | 31 Dec 2011 | - | - |
| Elisabeth Patricia Airey | Director | 26 May 1999 | 13 May 2009 | British | 67 years |
| Eric Swainson | Director | 8 Jun 1991 | 30 Aug 1995 | British | 100 years |
| George Edward Payne | Director | 15 Nov 1994 | 31 Mar 2003 | British | 77 years |
| George Jefferson | Director | 8 Jun 1991 | 31 Dec 1991 | British | 105 years |
| Iain Angus Jones | Secretary | 7 Oct 2017 | 12 Jun 2024 | - | - |
| Ian Philip Mchoul | Director | 8 Sept 2008 | 7 Oct 2017 | British | 66 years |
| James Anthony Dallas | Director | 28 Oct 1999 | 16 May 2007 | British | 71 years |
| Jean Alexandre Monville | Director | 26 Feb 1997 | 27 Jul 2006 | French | 82 years |
| Jean Paul Jacamon | Director | 27 Nov 2002 | 31 Aug 2006 | French | 79 years |
| Jerry Kent Masters | Director | 13 Feb 2015 | 2 Jun 2017 | American | 66 years |
| John Dalton Early | Director | 8 Jun 1991 | 31 Jul 2007 | British | 81 years |
| John Mcdonald Green Armytage | Director | 5 Jun 1996 | 31 May 2011 | Canadian,british | 81 years |
| John Patrick Connolly | Director | 1 Jun 2011 | 7 Oct 2017 | British | 76 years |
| John Swinburne Bateson | Director | 8 Jun 1991 | 31 Mar 1995 | British | 84 years |
| John William Frederic Nott | Director | 1 Jan 1992 | 30 Sept 1993 | British | 94 years |
| Jonathan James Muschamp Lewis | Director | 1 Jun 2016 | 7 Oct 2017 | British And United States | 65 years |
| Julian Robin Darley | Director | 5 Jun 1996 | 11 May 2000 | British | 89 years |
| Keith Wood Humphreys | Director | 30 Sept 1993 | 13 Sept 1999 | British | 92 years |
| Linda Louise Adamany | Director | 1 Oct 2012 | 7 Oct 2017 | American | 74 years |
| Malcolm Albert Hawe | Director | 8 Jun 1991 | 12 Jun 1992 | British | 88 years |
| Malcolm Kenyon Eckersall | Director | 7 Jul 1993 | 30 Jul 1999 | British | 81 years |
| Martha Ossian Hesse | Director | 1 Jun 2000 | 13 May 2010 | American | 84 years |
| Michael Blacker | Secretary | 20 Aug 2009 | 15 Mar 2011 | British | - |
| Michael John Bardsley | Secretary | 8 Jun 1991 | 1 Jun 2001 | British | - |
| Neil Alexander Bruce | Director | 21 Jan 2009 | 5 Oct 2012 | British | 66 years |
| Neil Andrew Patrick Carson | Director | 31 Aug 2010 | 31 Dec 2016 | British | 69 years |
| Oswald Davies | Director | 8 Jun 1991 | 5 Jun 1996 | British | 106 years |
| Peter James Holland | Secretary | 1 Jun 2001 | 20 Aug 2009 | British | - |
| Peter James Mason | Director | 1 Mar 1996 | 30 Sept 2006 | British | 80 years |
| Peter John Byrom | Director | 10 Feb 2005 | 9 Feb 2011 | British | 82 years |
| Peter S Janson | Director | 20 Apr 2000 | 22 May 2002 | Canadian | 79 years |
| Raymond William Mott | Director | 8 Jun 1991 | 30 Jun 1991 | English | 96 years |
| Robert Gordon Card | Director | 1 Mar 2017 | 7 Oct 2017 | American | 73 years |
| Ronald Hugh Peet | Director | 8 Jun 1991 | 5 Jun 1996 | British | 101 years |
| Roy Alexander Franklin | Director | 1 Jan 2016 | 7 Oct 2017 | British | 73 years |
| Rudi Kisjes | Director | 8 Jun 1991 | 31 Aug 1995 | Dutch | 83 years |
| Samir Yacoub Brikho | Director | 1 Oct 2006 | 17 Jan 2016 | Swedish | 68 years |
| Simon George Batey | Director | 12 Jun 1992 | 31 Mar 2000 | British | 73 years |
| Simon Robert Thompson | Director | 21 Jan 2009 | 14 May 2015 | British | 67 years |
| Stephanie Selina Newby | Director | 13 Nov 2014 | 7 Oct 2017 | American & British | 70 years |
| Stuart James Siddall | Director | 19 Jun 2000 | 14 May 2008 | British | 73 years |
| Sydney Gillibrand | Director | 1 Aug 1995 | 21 Jan 2004 | British | 92 years |
| Timothy William Faithfull | Director | 10 Feb 2005 | 3 Apr 2014 | British | 82 years |
| William George Setter | Director | 7 Oct 2017 | 21 Mar 2025 | British | 51 years |