| Adam Holden | Director | 11 May 2015 | 1 Jul 2016 | British | 52 years |
| Alan David Parry | Director | 11 Oct 2018 | 22 Jul 2021 | British | 58 years |
| Alexander David Baldock | Director | 8 Aug 2008 | 31 Aug 2012 | British | 55 years |
| Amy Williamson | Secretary | 11 Jan 2012 | 14 Sept 2012 | - | - |
| Andrew David Barnard | Director | 1 Feb 2010 | 31 May 2013 | British | 54 years |
| Andrew Paul Gadsby | Director | 31 May 2013 | 11 May 2015 | British | 59 years |
| Angela Mary Cunningham | Secretary | 14 Jul 2001 | 27 Nov 2006 | British | - |
| Brian Ward Heaney | Director | 1 Feb 1993 | 29 Jun 2000 | British | 71 years |
| Christopher George Knowles | Director | 6 Jun 2000 | 29 Feb 2004 | British | 68 years |
| Christopher Paul Sullivan | Director | 6 Jun 2000 | 29 Feb 2004 | British | 68 years |
| Clive Richard Dobbs | Director | 12 Nov 1999 | 16 Jun 2000 | British | 75 years |
| David Gerald Harris | Director | 11 Oct 2018 | 1 Nov 2019 | British | 56 years |
| David John Mcintosh Finlayson | Director | 1 Feb 1993 | 11 Jul 2000 | British | 83 years |
| David Roger Butterworth | Director | 20 Nov 1993 | 31 Aug 1995 | British | 81 years |
| George Anthony Schofield | Director | 1 Feb 1993 | 20 Nov 1993 | British | 85 years |
| George Smith-salmond Ashworth | Director | 1 Mar 2004 | 25 Jun 2007 | English | 69 years |
| Gillian Wraith Carter | Secretary | 27 Nov 2006 | 8 Aug 2008 | British | - |
| Graham Colin Clemett | Director | 2 Sept 2002 | 1 Jun 2007 | British | 65 years |
| Heidi Elizabeth Bromley | Secretary | 30 Sept 2000 | 13 Jul 2001 | British | - |
| Iain Arthur Houston | Director | 12 Nov 1999 | 11 Jul 2000 | British | 76 years |
| Ian Duncan Cowie | Director | 1 Jul 2016 | 31 Oct 2016 | British | 65 years |
| Ian John Isaac | Director | 11 Oct 2018 | 30 Sept 2024 | British | 62 years |
| Ian Maclaren Sutherland | Director | 1 Feb 1993 | 30 Sept 1993 | British | 86 years |
| James Higginbotham | Director | 27 Feb 2015 | 21 Feb 2017 | British | 56 years |
| James Michael Kelly | Director | 19 Apr 1996 | 11 Jul 1997 | British | 69 years |
| John Donald Black Workman | Director | 19 Nov 1994 | 1 Dec 1999 | British | 73 years |
| John Hamer Wood | Director | 28 Jun 2016 | 30 Jun 2017 | British | 63 years |
| John Huw Evans | Director | 1 Feb 1993 | 30 Jun 2000 | British | 75 years |
| John Paul Thwaite | Director | 31 Oct 2016 | 11 Oct 2018 | British | 54 years |
| John Reginald Pollard | Director | 19 Apr 1993 | 30 Jun 2000 | British | 67 years |
| Joseph Alexander Pattara | Director | 7 Feb 2017 | 30 Dec 2021 | British | 52 years |
| Joseph David Taylor | Director | 22 Jul 2021 | 27 Jun 2024 | British | 45 years |
| Keith Spencer Woodley | Director | 1 Feb 1993 | 12 Jul 1996 | British | 86 years |
| Kenneth Austin Graham | Director | 1 Feb 1993 | 1 Dec 1999 | British | 97 years |
| Kirsty Daly | Secretary | 1 Jun 2011 | 11 Jan 2012 | - | - |
| Lindsey Helen Cameron | Secretary | 8 Aug 2008 | 31 May 2011 | Other | - |
| Martin John Harper | Director | 1 Feb 1993 | 31 Dec 1993 | British | 100 years |
| Michael Ian Charles Woodcock | Secretary | 1 Feb 1993 | 29 Sept 2000 | British | - |
| Neeraj Kapur | Director | 1 Jun 2007 | 1 Feb 2010 | British | 60 years |
| Nigel Pearce | Director | 23 Jun 2000 | 31 May 2003 | British | 74 years |
| Nigel Timothy John Clibbens | Director | 16 May 2002 | 27 Feb 2015 | British | 66 years |
| Paul Anthony Lynam | Director | 1 Nov 2004 | 8 Aug 2008 | Irish | 57 years |
| Paul Marrow | Director | 1 Mar 2004 | 31 Oct 2004 | British | 73 years |
| Peter Moffat | Director | 30 Dec 2021 | 30 Sept 2024 | British | 47 years |
| Richard Mark Priestman | Director | 1 Jun 2007 | 25 Jun 2010 | British | 69 years |
| Robert Duncan Brodie | Director | 23 Jun 2000 | 31 May 2003 | British | 60 years |
| Robert Macdonald Mcinnes | Director | 20 Nov 1993 | 1 Dec 1994 | British | 85 years |
| Trevor Douglas Crome | Director | 27 Feb 2015 | 28 Jun 2016 | British | 65 years |