| Adrian Thomas Grace | Director | 27 Feb 2008 | 16 Jan 2009 | British | 63 years |
| Alan Adams Murray | Director | 1 Aug 1991 | 19 Dec 1997 | British | 78 years |
| Alexander David Nicol | Director | N/A | 30 Sept 1997 | British | 88 years |
| Alexander Douglas Peebles | Director | 1 Aug 1991 | 15 Jul 1998 | British | 79 years |
| Alistair Linn Webster | Director | 20 Jan 2004 | 30 Jun 2009 | British | 73 years |
| Brian Colin Donaldson | Director | 5 Jul 1999 | 25 Feb 2000 | British | 69 years |
| Carol Ann Ritchie | Director | 16 Dec 2002 | 30 Apr 2004 | British | 67 years |
| Colin Graham Dowsett | Director | 29 May 2013 | 22 Nov 2023 | British | 62 years |
| Derek Robert Scott Lamond | Director | 1 Jul 1998 | 30 Mar 2000 | British | 68 years |
| Elizabeth Jane Herman | Director | 1 Jul 1998 | 5 Jul 1999 | British | 66 years |
| Eric Fenton Sanderson | Director | N/A | 31 Aug 1997 | British | 75 years |
| George Gibson Reid | Director | 20 Jan 2004 | 4 Jan 2006 | British | 58 years |
| Ian Fenton Brown | Director | N/A | 16 May 1991 | British | 97 years |
| James Mcmicken Young | Director | N/A | 27 Apr 1994 | British | 101 years |
| James Owen Trace | Director | 18 Apr 2011 | 29 May 2013 | British | 63 years |
| James Robin Browning | Director | 1 Sept 1997 | 1 Jul 1998 | British | 87 years |
| John Alastair Wight | Director | 1 Jul 1998 | 29 Jun 1999 | British | 77 years |
| John Mccabe | Director | N/A | 17 Dec 1999 | British | 77 years |
| John Michael Morrissey | Director | 30 Jun 2009 | 31 Aug 2010 | British | 65 years |
| John Robert Turner | Director | 29 May 2013 | 30 Jan 2024 | British | 62 years |
| John William Robertson | Secretary | N/A | 17 Nov 1999 | British | - |
| Jonathan Scott Foster | Director | 19 Feb 2013 | 5 Mar 2015 | British | 68 years |
| Joyce Ferrie | Secretary | 13 May 1998 | 17 Nov 1999 | British | - |
| Judith Angela Holme | Director | 30 Jun 2009 | 9 Dec 2011 | British | 61 years |
| Kevin Charles Harris | Director | 29 May 2013 | 30 Sept 2015 | British | 59 years |
| Kevin Turner | Director | 23 Sept 2015 | 19 Dec 2024 | British | 62 years |
| Lindsay John Town | Director | 20 Jan 2004 | 27 Feb 2008 | British | 72 years |
| Martin Kenneth Staples | Director | 4 Jan 2006 | 31 Oct 2006 | British | 53 years |
| Michael John David Griffiths | Director | 18 Apr 2011 | 29 May 2013 | British | 77 years |
| Michelle Antoinette Angela Johnson | Secretary | 3 Sept 2013 | 25 Oct 2017 | - | - |
| Nigel Lockwood Bowman | Director | 13 Sept 1994 | 1 Jul 1998 | British | 78 years |
| Paul Gittins | Secretary | 1 Jun 2000 | 3 Sept 2013 | British | - |
| Peter Wynford West | Director | 13 Sept 1994 | 11 Jun 1998 | British | 82 years |
| Raymond Nixon | Secretary | 17 Nov 1999 | 31 May 2000 | British | - |
| Robert Brown Hare | Director | 5 Jul 1999 | 7 Mar 2005 | British | 66 years |
| Steven David Russell Chessman | Director | 27 Aug 2010 | 28 Feb 2011 | British | 63 years |
| Stuart James Ballingall | Director | 15 Jan 2007 | 30 Jun 2009 | British | 62 years |
| Thomas Bennie | Director | 23 Dec 1992 | 1 Jul 1998 | British | 94 years |
| William Gordon Barclay | Director | 11 May 2001 | 31 Dec 2002 | British | 79 years |