| Allyson Mary Teresa Ablett | Secretary | 5 Aug 2005 | 31 Dec 2008 | British | - |
| Anoop Kang | Director | 7 Jan 2016 | 21 Dec 2016 | British | 52 years |
| Christopher John Cook | Director | 30 Sept 1992 | 5 Oct 1995 | British | 82 years |
| Colin Irwin John Hamilton Drummond | Director | 30 Sept 1992 | 15 Dec 2000 | British | 75 years |
| David Neville Benson | Director | 8 Jul 2013 | 9 Oct 2015 | British | 56 years |
| David William Edmund Sterry | Director | 8 Jun 2004 | 7 Jul 2008 | British | 78 years |
| Deborah Pamela Hamilton | Secretary | 8 Jul 2013 | 22 Sept 2014 | - | - |
| Donald William Macdiarmid | Director | 6 Sept 2012 | 8 Jul 2013 | British | 65 years |
| Douglas Bleakley | Director | 29 Feb 1996 | 17 May 1998 | British | 79 years |
| Haydn Jonathan Mursell | Director | 8 Jul 2013 | 16 Apr 2015 | British | 55 years |
| Hugh Edward Earle Raven | Director | 8 Jul 2013 | 16 Apr 2015 | British | 55 years |
| Jonathan Allatt | Director | 8 Jun 2004 | 8 Jun 2004 | British | 54 years |
| Kenneth David Woodier | Secretary | 1 Mar 1998 | 15 Dec 2000 | British | - |
| Leslie Arthur Nicks | Director | 30 Sept 1992 | 15 Dec 2000 | British | 82 years |
| Mark Antony Hazlewood | Director | 13 Mar 2012 | 8 Jul 2013 | British | 60 years |
| Matthew Armitage | Director | 16 Apr 2015 | 16 Jul 2015 | British | 54 years |
| Matthew Armitage | Secretary | 22 Dec 2014 | 16 Jun 2015 | - | - |
| Matthew Stevens | Director | 9 Dec 2009 | 13 Mar 2012 | British | 57 years |
| Michael Edward Dunn | Director | 5 Aug 2005 | 8 Jan 2010 | British | 58 years |
| Michael John Froud | Director | 1 Jun 1995 | 21 Nov 2000 | British | 67 years |
| Peter George Harvey | Director | 7 Apr 1997 | 16 Dec 2000 | British | 75 years |
| Peter John Askew | Director | 1 Apr 1994 | 8 Jun 2004 | British | 79 years |
| Philip Windover Fellowes-prynne | Director | 14 Apr 2008 | 6 Sept 2012 | British | 64 years |
| Robert Colin Milligan | Secretary | 30 Sept 1992 | 28 Feb 1998 | British | - |
| Robert Ernest Patrick Browne | Director | 8 Jun 2004 | 5 Aug 2005 | British | 84 years |
| Robert Ernest Patrick Browne | Secretary | 8 Jun 2004 | 5 Aug 2005 | British | - |
| Robert Michael Birdsey | Director | 15 Dec 2000 | 8 Jun 2004 | British | 76 years |
| Simon John Howell | Secretary | 1 Jan 2009 | 8 Jul 2013 | British | - |
| Timothy Mark Read | Director | 1 Apr 1994 | 8 Jun 2004 | British | 63 years |
| Timothy Mark Read | Secretary | 15 Dec 2000 | 8 Jun 2004 | British | - |