| Alan Paul Busson | Secretary | 10 Apr 2006 | 29 Sept 2006 | British | - |
| Alan Robert Young | Director | 22 Jul 1991 | 31 Jul 1995 | British | 88 years |
| Amanda Louise Knott | Secretary | 29 Sept 2006 | 7 Apr 2014 | British | - |
| Andrew John Smart | Director | 17 Dec 1997 | 2 Sept 2002 | British | 67 years |
| Ann Claire Blundell | Secretary | 25 Jul 2013 | 7 Apr 2014 | - | - |
| Anthony James Davies | Director | 20 Mar 1998 | 21 Nov 2005 | British | 71 years |
| Anthony Paul Kenmir | Director | 2 Dec 2009 | 16 Mar 2015 | British | 70 years |
| Brian Michael Thomas | Director | 14 Nov 1995 | 17 Dec 1997 | British | 74 years |
| Brian Mildenhall | Director | 24 Sept 1993 | 20 Mar 1997 | British | 71 years |
| Calvert Crawford Hassard | Director | 5 Jun 1991 | 22 Jul 1991 | British | 80 years |
| Caroline Susan Bailey | Director | 20 May 2005 | 21 Jul 2006 | British | 65 years |
| Colin John Webb | Director | 22 Jul 1991 | 22 Jul 1994 | British | 77 years |
| Colin Leonard John Barwick | Director | 6 Dec 1993 | 1 Sept 1995 | British | 81 years |
| Corina Katherine Ross | Secretary | 5 Dec 2008 | 25 Jul 2013 | British | - |
| Daniel John Pender | Director | 24 Jul 2012 | 1 Jul 2013 | British | 51 years |
| David Alan Seviour | Director | 17 Dec 1997 | 14 Mar 2001 | British | 90 years |
| David Perrott Sims | Director | 21 Jul 2006 | 1 Oct 2009 | British | 68 years |
| David Perrott Sims | Director | 1 Sept 2011 | 7 Jun 2012 | British | 68 years |
| Gary Paul John Shaughnessy | Director | 7 Jun 2012 | 16 Mar 2015 | British | 60 years |
| Helen Frances Leigh Rogers | Secretary | 14 Jul 2008 | 5 Dec 2008 | British | - |
| Ian Ritchie | Secretary | 25 Jul 2013 | 7 Apr 2014 | - | - |
| James Douglas Sutherland | Director | 16 Mar 2015 | 20 Oct 2017 | British | 52 years |
| James Edward Bullimore | Director | 21 Jun 2000 | 15 May 2002 | British | 75 years |
| James Kingsley Reeve | Director | 15 Jan 2003 | 31 Mar 2004 | British | 69 years |
| James Richard Sykes | Director | 21 Jul 2006 | 23 Oct 2009 | British | 65 years |
| Jayne Michelle Meacham | Secretary | 1 Nov 2006 | 2 May 2008 | British | - |
| Jon Hopper | Director | 28 Jul 2005 | 21 Jul 2006 | British | 56 years |
| Jonathan Vaughan-williams | Director | 16 Mar 2015 | 28 Apr 2017 | British | 59 years |
| Keith John Davies | Director | 21 Feb 1995 | 17 Dec 1997 | British | 79 years |
| Keith Reginald Baldwin | Director | 7 Sept 2001 | 31 Aug 2003 | British | 78 years |
| Kevin Hugh Ronaldson | Director | 17 Dec 1997 | 29 Feb 2004 | British | 68 years |
| Ladislav Vaclav Suchopar | Director | 5 Jun 1991 | 30 Jun 1991 | British | 83 years |
| Lawrence Churchill | Director | 5 Dec 2002 | 24 Jun 2004 | British | 80 years |
| Lily Olisa Holding | Secretary | 24 Jun 2004 | 8 Apr 2005 | British | - |
| Marcus Nagel | Director | 7 Dec 2009 | 20 Feb 2012 | German | 61 years |
| Martin Lindsay Bride | Director | 21 Jul 2006 | 24 Apr 2009 | British | 63 years |
| Michael Andrew Ferns | Director | 17 Dec 1997 | 27 Apr 2000 | British | 62 years |
| Michael Andrew Ferns | Director | 13 Aug 2002 | 21 Jul 2006 | British | 62 years |
| Michael Joseph Brennan | Director | 1 Oct 2009 | 31 Aug 2011 | British Irish | 74 years |
| Neil James Evans | Director | 29 Jul 2014 | 31 Mar 2016 | British | 69 years |
| Nigel Foster Burton | Director | 5 Jun 1991 | 30 Jun 1991 | British | 75 years |
| Nigel Lowe | Secretary | 8 Apr 2005 | 10 Apr 2006 | British | - |
| Norman Colin Taplin | Director | 11 Sept 1995 | 23 Jul 2001 | British | 79 years |
| Oscar Clemente Tengtio | Director | 1 Jun 2009 | 24 Jul 2012 | American | 70 years |
| Peter Charles Campbell | Director | 6 Mar 1998 | 12 Apr 1999 | British | 68 years |
| Peter Charles Howe | Director | 22 Jul 1991 | 17 Dec 1997 | British | 80 years |
| Peter Charles Howe | Secretary | 5 Jun 1991 | 24 Jun 2004 | British | - |
| Peter Jeffrey Da Costa | Director | 5 Jun 1991 | 22 Jul 1991 | British | 83 years |
| Stephen James Leaman | Director | 4 Feb 2005 | 21 Jul 2006 | British | 79 years |
| Victoria Louise De Temple | Director | 13 Nov 2017 | 1 May 2018 | British | 48 years |
| William George Mercer Colson | Director | 25 Aug 2000 | 4 Dec 2002 | British | 71 years |
| William George Vasilieff | Director | 22 Jul 1991 | 12 Nov 1993 | British | 71 years |
| William Richard West | Director | 22 Dec 1997 | 23 Jul 2001 | British | 69 years |