| Aileen Mathieson | Director | 23 Mar 2017 | 10 Sept 2018 | British | 58 years |
| Alan Paul Busson | Secretary | 13 Mar 2006 | 29 Sept 2006 | British | - |
| Amanda Louise Knott | Secretary | 29 Sept 2006 | 25 Jul 2013 | British | - |
| Andrew David Strang | Director | 27 Jun 1994 | 5 Mar 2008 | British | 73 years |
| Ann Claire Blundell | Secretary | 25 Jul 2013 | 10 Mar 2014 | - | - |
| Anthony John Russell | Director | 1 May 1992 | 30 Apr 1998 | British | 84 years |
| Christopher Walter Laidlaw | Director | 1 Aug 1993 | 18 Sept 1995 | British | 74 years |
| Corina Katherine Ross | Secretary | 4 Mar 2011 | 25 Jul 2013 | British | - |
| David Arthur Lancaster | Secretary | 1 May 1992 | 20 Mar 1995 | British | - |
| 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 | 25 Jul 2013 | 10 Mar 2014 | - | - |
| James Anthony Wiltshire | Secretary | 20 Mar 1995 | 31 May 1999 | British | - |
| James Mark Alexander Rigg | Director | 5 Mar 2008 | 8 Jan 2018 | British | 58 years |
| Jayne Michelle Meacham | Secretary | 1 Nov 2006 | 2 May 2008 | British | - |
| Jeremy Alexander James Fraser Burnett Rae | Director | 27 Jun 1994 | 10 Jul 1997 | British | 73 years |
| John Marcus Willcock | Director | 9 Sept 2002 | 8 Jan 2018 | British | 63 years |
| Lily Olisa Holding | Secretary | 12 Aug 2003 | 23 Jun 2005 | British | - |
| Margaret Elizabeth Gibbon | Secretary | 31 May 1999 | 12 Aug 2003 | British | - |
| Myles Gibson | Director | 1 May 1992 | 31 Jul 1993 | British | 78 years |
| Neil James Evans | Director | 15 May 2002 | 8 Apr 2014 | British | 69 years |
| Nigel Lowe | Secretary | 23 Jun 2005 | 13 Mar 2006 | British | - |
| Richard Molineux Kitson | Director | 1 May 1992 | 2 Nov 1992 | British | 95 years |
| Robert Walter Allen | Director | 27 Jun 1994 | 9 Sept 2002 | British | 73 years |
| Roderick John Graeme Bushell | Director | 1 May 1992 | 30 Jun 1997 | British | 68 years |
| Roger Hedley Whalley | Director | 1 May 1992 | 23 Mar 1994 | British | 82 years |
| Steven Lewis Wall | Director | 8 Apr 2014 | 10 Sept 2018 | British | 55 years |
| Stuart Tyler | Director | 5 Aug 2014 | 31 Jan 2017 | English | 53 years |
| Vincent James Rennie | Director | 5 Mar 2008 | 5 Aug 2014 | British | 74 years |