| Agnes Robson | Director | 1 Apr 1989 | 30 Mar 1990 | British | 80 years |
| Alasdair Duncan Stewart | Director | 10 Oct 1990 | 31 Oct 1993 | British | 93 years |
| Andrew Spurr | Director | 15 Feb 2001 | 27 Feb 2007 | British | 73 years |
| Andrew Spurr | Director | 26 Jun 2009 | 31 Dec 2013 | British | 73 years |
| Brian Cowell | Director | 1 Nov 2017 | 2 Dec 2019 | British | 65 years |
| Charles Noel Davies | Director | 1 Jan 1999 | 15 Jul 1999 | British | 93 years |
| David Anderson | Director | 1 Aug 1997 | 4 Jun 2001 | British | 83 years |
| David Fraser Mitchell | Director | 28 Apr 2015 | 5 Feb 2018 | British | 53 years |
| David Jeremy Western | Director | 1 Nov 2001 | 11 Feb 2007 | British | 74 years |
| David Stuart Gilchrist | Director | 2 Jul 2001 | 5 Aug 2004 | British | 74 years |
| George Cartner Duke | Director | 1 Apr 1989 | 30 Mar 1990 | British | 82 years |
| George Cartner Duke | Secretary | 1 Apr 1989 | 30 Mar 1990 | British | - |
| George Edward Charles Jenkins Jenkins | Director | 1 Jan 1999 | 4 Jun 2001 | British | 86 years |
| Gordon Alexander Boyd | Director | 1 Nov 2001 | 10 Oct 2002 | British | 66 years |
| James Hann | Director | 30 Mar 1990 | 4 Oct 1995 | British | 93 years |
| James Stevenson Grant | Director | 24 Nov 1995 | 31 Jul 1997 | British | 89 years |
| Jan Neumann | Director | 30 Mar 1990 | 30 Sept 1993 | British | 102 years |
| Jean Elizabeth Macdonald | Secretary | 3 Jul 2009 | 19 Jul 2010 | British | - |
| Jean Elizabeth Macdonald | Director | 2 Jun 2009 | 19 Jul 2010 | British | 69 years |
| Jean Elizabeth Macdonald | Secretary | 1 Sept 1995 | 31 Dec 1998 | British | - |
| John Scotland Moreland | Director | 30 Mar 1990 | 31 Dec 1998 | British | 95 years |
| Keith Geddes Lough | Director | 20 Sept 2001 | 8 Dec 2003 | British | 67 years |
| Michael Brian John Low | Director | 1 Jan 1999 | 25 Apr 2000 | British | 78 years |
| Michael Howard Livesay | Director | 1 Oct 1993 | 31 Dec 1998 | British | 90 years |
| Michael Ralph Kirwan | Director | 1 Jan 1999 | 20 Sept 2001 | British | 85 years |
| Mike Alexander | Director | 14 Mar 2003 | 20 Mar 2005 | British | 79 years |
| Neil Richard John Stewart | Director | 24 Nov 1995 | 31 Dec 1998 | British | 75 years |
| Paul Anthony Brady | Director | 1 Apr 1989 | 30 Mar 1990 | British | 77 years |
| Peter David Stevenson | Director | 10 Oct 1990 | 31 Dec 1998 | British | 79 years |
| Peter James Webster | Director | 14 Jun 2004 | 16 Oct 2006 | British | 77 years |
| Peter Thomas Hollins | Director | 15 May 1998 | 7 Jun 2001 | British | 79 years |
| Peter Wakefield | Director | 6 Feb 2006 | 27 Feb 2007 | British | 76 years |
| Philip Blackburn | Director | 4 Jun 2001 | 12 Sept 2005 | British | 76 years |
| Richard Millett Yeomans | Director | 30 Mar 1990 | 29 Aug 1991 | British | 94 years |
| Richard Nigel Barnes | Director | 1 Nov 1993 | 30 Sept 1995 | British | 82 years |
| Robert Charles Finch Hill | Director | 1 Jan 1999 | 30 Jul 2003 | British | 89 years |
| Robert Guyler | Director | 18 May 2012 | 28 Apr 2015 | British | 60 years |
| Robert Malcolm Armour | Director | 27 Feb 2007 | 3 Jul 2009 | British | 67 years |
| Robert Malcolm Armour | Secretary | 30 Mar 1990 | 1 Sept 1995 | British | - |
| Robert Malcolm Armour | Secretary | 1 Jan 1999 | 3 Jul 2009 | British | - |
| Robin Campbell Jeffrey | Director | 1 Mar 1992 | 15 May 1998 | British | 87 years |
| Robin Campbell Jeffrey | Director | 7 Jun 2001 | 10 Feb 2003 | British | 87 years |
| Roy Anderson | Director | 2 Aug 2004 | 17 Nov 2006 | British | 78 years |
| Salvatore Martin Gatto | Director | 7 Jan 2004 | 16 Sept 2004 | British | 76 years |
| Secretary Of State For Scotland | Corporate Director | 30 Mar 1990 | 10 Oct 1990 | - | - |
| Simone Rossi | Director | 1 Apr 2011 | 18 May 2012 | Italian | 58 years |
| Sir Robert Walmsley | Director | 17 Mar 2004 | 11 Feb 2007 | British | 85 years |
| Stephen Robert Billingham | Director | 24 Sept 2004 | 31 Mar 2009 | British | 68 years |
| Stuart Crooks | Director | 1 Jan 2014 | 31 Oct 2017 | British | 61 years |
| Thomas Andreas Kusterer | Director | 1 Apr 2009 | 29 Mar 2011 | German | 58 years |
| William Alfred Coley | Director | 20 Mar 2005 | 31 Jul 2009 | British | 83 years |