| Amanda Louise Knott | Secretary | 17 Apr 2007 | 26 Jun 2013 | British | - |
| Andrew David Strang | Director | 26 Sept 1994 | 20 Oct 2004 | British | 73 years |
| Andrew Stephen Melcher | Director | 1 May 1992 | 8 Nov 1993 | U S | 77 years |
| Ann Claire Blundell | Secretary | 26 Jun 2013 | 17 Mar 2014 | - | - |
| Anthony John Russell | Director | 1 May 1992 | 30 Apr 1998 | British | 84 years |
| Christopher Walter Laidlaw | Director | 1 Aug 1993 | 8 Nov 1993 | British | 74 years |
| Christopher Wills Beazley | Director | 7 Feb 2005 | 24 Mar 2006 | British | 64 years |
| Corina Katherine Ross | Secretary | 21 Mar 2011 | 26 Jun 2013 | British | - |
| Daniel John Pender | Director | 25 Jul 2012 | 1 Jul 2013 | British | 51 years |
| David Arthur Lancaster | Director | 1 May 1992 | 20 Mar 1995 | British | 86 years |
| Helen Frances Leigh Rogers | Secretary | 14 Jul 2008 | 2 Dec 2011 | British | - |
| Ian Douglas Macrae | Director | 30 Apr 1998 | 16 May 2002 | British | 73 years |
| Ian Ritchie | Secretary | 26 Jun 2013 | 17 Mar 2014 | - | - |
| James Anthony Wiltshire | Secretary | 1 May 1992 | 1 May 1994 | British | - |
| James Anthony Wiltshire | Secretary | 1 May 1992 | 31 May 1999 | British | - |
| Jayne Michelle Meacham | Secretary | 17 Apr 2007 | 2 May 2008 | British | - |
| Jeremy Alexander James Fraser Burnett Rae | Director | 26 Sept 1994 | 10 Jul 1997 | British | 73 years |
| John Marcus Willcock | Director | 9 Sept 2002 | 20 Oct 2004 | British | 63 years |
| Lily Olisa Holding | Secretary | 12 Aug 2003 | 23 Jun 2005 | British | - |
| Linda Mary Young | Director | 26 Jun 2013 | 30 Sept 2014 | British | 63 years |
| Margaret Elizabeth Gibbon | Secretary | 31 May 1999 | 12 Aug 2003 | British | - |
| Martin Lindsay Bride | Director | 24 Mar 2006 | 24 Apr 2009 | British | 63 years |
| Martin Stephen Draper | Director | 23 Mar 2023 | 30 Jun 2024 | British | 57 years |
| Michael Harris | Director | 20 Oct 2004 | 7 Feb 2005 | British | 61 years |
| Myles Gibson | Director | 1 May 1992 | 31 Jul 1993 | British | 78 years |
| Neil James Evans | Director | 15 May 2002 | 31 Mar 2016 | British | 69 years |
| Nigel Lowe | Secretary | 23 Jun 2005 | 17 Apr 2007 | British | - |
| Oscar Clemente Tengtio | Director | 28 May 2009 | 31 Aug 2012 | American | 70 years |
| Robert Walter Allen | Director | 26 Sept 1994 | 9 Sept 2002 | British | 73 years |
| Shaun Tony Hicks | Director | 31 Oct 2013 | 27 Feb 2023 | British | 58 years |
| Steven Lewis Wall | Director | 1 Apr 2016 | 1 Apr 2016 | British | 55 years |
| Steven Lewis Wall | Director | 1 Apr 2016 | 31 Mar 2023 | British | 55 years |
