| Alan Wingate Jones | Director | 1 Apr 1995 | 31 Aug 1999 | British | 87 years |
| Alistair James Wivell | Director | 9 Jul 2002 | 31 Dec 2005 | British | 81 years |
| Andrew James Mcnaughton | Director | 1 Jan 2009 | 3 May 2014 | British | 63 years |
| Andrew Robert Astin | Secretary | 4 Aug 2015 | 15 Mar 2017 | - | - |
| Anthony Leon Philip Rabin | Director | 9 Jul 2002 | 30 Jun 2012 | British | 71 years |
| Belinda Jane Richards | Director | 1 Sept 2013 | 21 Nov 2014 | British | 68 years |
| Carl Eric Painter | Director | 10 Jan 1995 | 27 Aug 1998 | American | 80 years |
| Chalmers Carr | Director | 1 Sept 2003 | 31 Aug 2006 | British | 89 years |
| Christopher David Vaughan | Secretary | 10 Sept 2008 | 30 Jun 2015 | British | - |
| Christopher Rait O'neill Pearson | Secretary | 1 Oct 2000 | 10 Sept 2008 | British | - |
| Christopher Reginald Reeves | Director | 24 Apr 1992 | 15 May 2003 | British | 90 years |
| Christopher William Healy | Secretary | 1 Jul 2015 | 3 Aug 2015 | - | - |
| David Glyndwr John | Director | 15 Aug 2000 | 15 May 2008 | British | 88 years |
| David John Wright | Director | 1 Jan 2003 | 31 Dec 2005 | British | 82 years |
| David Ross Mercer | Secretary | 15 Mar 2017 | 4 Feb 2019 | - | - |
| David Ross Mercer | Secretary | 7 Oct 2019 | 29 Jun 2020 | - | - |
| Duncan Jonathan Magrath | Director | 31 Mar 2008 | 30 Apr 2015 | British | 62 years |
| Edward George Nicholas Patrick The Duke Of Kent | Director | 24 Apr 1992 | 24 Apr 1994 | British | 91 years |
| Edward Morrison Astle | Director | 13 Jan 1998 | 21 Apr 1999 | British | 72 years |
| Eric Clark | Director | 24 Apr 1992 | 16 Apr 1996 | British | 92 years |
| Geoffrey Howe Of Aberavon | Director | 24 Apr 1992 | 30 Apr 1997 | British | 98 years |
| Gordon Holden Sage | Director | 1 Sept 2003 | 31 Dec 2010 | British | 79 years |
| Graham Charles Roberts | Director | 1 Jan 2009 | 1 Jul 2016 | British | 68 years |
| Hans Christoph Von Rohr | Director | 10 Jun 2003 | 9 Sept 2008 | German | 88 years |
| Harry C Schell | Director | 24 Apr 1992 | 6 Apr 1993 | Usa | 92 years |
| Henry Michael Pearson Miles | Director | 10 Dec 1996 | 16 May 2002 | British | 90 years |
| Hubertus Krossa | Director | 9 Sept 2008 | 16 May 2013 | German | 79 years |
| Iain George Thomas Ferguson | Director | 1 Jan 2010 | 16 May 2019 | British | 71 years |
| Ian Paul Tyler | Director | 5 Oct 1999 | 31 Mar 2013 | British | 66 years |
| James Lionel Cohen | Director | 9 Feb 2000 | 18 Feb 2007 | British | 84 years |
| Jonathan Lagan | Secretary | 4 Feb 2019 | 28 Aug 2019 | - | - |
| Leo Martin Quinn | Director | 1 Jan 2015 | 8 Sept 2025 | British | 70 years |
| Malcolm Kenyon Eckersall | Director | 6 Jun 2000 | 7 Oct 2003 | British | 81 years |
| Malcolm Rowland Bates | Director | 8 Jul 1997 | 31 Jan 1999 | British | 92 years |
| Michael Anthony Lucki | Director | 1 Jul 2017 | 8 May 2025 | American | 70 years |
| Michael James Downie | Director | 1 Jan 1996 | 31 May 1999 | British | 76 years |
| Michael John Donovan | Director | 1 Jul 2006 | 1 Oct 2013 | British | 73 years |
| Michael William Welton | Director | 1 Jan 1996 | 31 Dec 2004 | British | 80 years |
| Paul John Lester | Director | 9 Feb 2000 | 28 Jun 2002 | British | 77 years |
| Paul Waters | Secretary | 29 Jun 2020 | 16 Sept 2020 | - | - |
| Peter James Mason | Director | 1 Jan 1993 | 31 Jan 1996 | British | 80 years |
| Peter John Louis Zinkin | Director | 24 Apr 1992 | 25 Mar 2015 | British | 73 years |
| Peter Leahy Bonfield | Director | 18 Aug 1992 | 16 Apr 1996 | British | 82 years |
| Philip Stanley Aiken | Director | 26 Mar 2015 | 31 Jul 2021 | Australian | 77 years |
| Richard Delbridge | Director | 24 Oct 2002 | 31 Dec 2005 | British | 84 years |
| Robert James Davidson | Director | 24 Apr 1992 | 30 Apr 1997 | British | 98 years |
| Robert Joris Willem Walvis | Director | 26 Sept 2001 | 31 Dec 2012 | Dutch | 79 years |
| Robert Michael Amen | Director | 10 Jun 2010 | 31 Dec 2015 | American | 77 years |
| Robin Adair Biggam | Director | 24 Apr 1992 | 30 Jun 1996 | British | 88 years |
| Ronald Andrew Henderson | Director | 24 Apr 1992 | 15 Oct 1999 | British | 80 years |
| Stephen Lee Howard | Director | 1 Jul 2006 | 17 Aug 2009 | British | 73 years |
| Stephen Robert Billingham | Director | 1 Jun 2015 | 9 May 2024 | British | 68 years |
| Steven Marshall | Director | 1 Nov 2005 | 25 Mar 2015 | British | 69 years |
| Stuart Fraser Murray | Secretary | 24 Apr 1992 | 30 Sept 2000 | British | - |
| Stuart John Doughty | Director | 8 Apr 2015 | 9 May 2024 | British | 83 years |
| Udo Gunter Stark | Director | 6 Jun 1995 | 10 Jun 2003 | German | 79 years |
| Vera Maureen Kempston Darkes | Director | 11 Jul 2012 | 18 May 2017 | Canadian | 78 years |
| William Gennydd Thomas | Director | 1 Sept 2013 | 21 Nov 2014 | British | 67 years |
| William Kenneth James Weir | Director | 24 Apr 1992 | 15 May 2003 | British | 93 years |