| Agnes Robson | Director | 1 Apr 1989 | 30 Mar 1990 | British | 80 years |
| Alan Moffat Young | Director | 27 Mar 1990 | 28 Jul 1994 | British | 89 years |
| Arnold Roger Alexander Young | Director | 30 Mar 1990 | 21 Jan 1999 | British | 82 years |
| Arnold Wadkin Read | Director | 27 Mar 1990 | 24 Jul 1997 | British | 89 years |
| Colin William Hood | Director | 1 Jan 2001 | 31 Oct 2011 | British | 71 years |
| Crawford Scott Gillies | Director | 1 Aug 2015 | 30 Sept 2020 | British | 70 years |
| David Clive Wilson Of Tillyorn | Director | 1 Feb 1993 | 30 Nov 2000 | British | 91 years |
| David Hugh Walton Payne | Director | 15 Jun 1998 | 26 Jul 2007 | British | 84 years |
| David Mclaren Gray | Director | 13 Jul 1998 | 10 Nov 1999 | British | 75 years |
| David Sigsworth | Director | 19 Jan 1995 | 31 Mar 2005 | British | 80 years |
| Edwin Bruce Farmer | Director | 14 Dec 1998 | 31 Dec 2004 | British | 90 years |
| Fraser Mcgregor Alexander | Director | 1 Oct 2002 | 1 Dec 2023 | British | 63 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 | - |
| Graeme David William Odgers | Director | 14 Dec 1998 | 18 May 2004 | British | 92 years |
| Hazel Louise Walker | Secretary | 1 May 1999 | 19 May 2000 | British | - |
| Helen Margaret Mahy | Director | 1 Mar 2016 | 17 Jul 2025 | British | 65 years |
| Henry Roberts Casley | Director | 14 Dec 1998 | 17 May 2005 | British | 89 years |
| Ian David Grant | Director | 1 May 1992 | 31 Oct 2003 | British | 83 years |
| Ian Derek Marchant | Director | 14 Dec 1998 | 30 Jun 2013 | British | 65 years |
| Ian William Mcmillan | Director | 29 Apr 1996 | 29 Sept 2000 | British | 83 years |
| James Alexander Forbes | Director | 14 Dec 1998 | 30 Sept 2002 | British | 80 years |
| James Francis Cameron Jebson | Secretary | 30 Mar 1990 | 26 Mar 1993 | British | - |
| James Hart | Director | 14 Dec 1998 | 31 Mar 2001 | British | 81 years |
| James Henry Martin | Director | 13 Apr 1998 | 2 Oct 2001 | British | 73 years |
| Jeremy Beeton | Director | 1 Jul 2011 | 19 Jul 2018 | British | 73 years |
| John Bullard Gray | Director | 30 Mar 1990 | 30 Jul 1998 | British | 85 years |
| Katie Bickerstaffe | Director | 1 Jul 2011 | 30 Apr 2018 | British | 59 years |
| Kevin Smith | Director | 24 Jun 2004 | 24 Jul 2008 | British | 72 years |
| Lawrence John Vincent Donnelly | Secretary | 3 Jun 1993 | 1 May 1999 | British | - |
| Lawrence John Vincent Donnelly | Secretary | 19 May 2000 | 1 Dec 2014 | British | - |
| Michael Giles Neish Walker | Director | 30 Mar 1990 | 14 Dec 1998 | British | 93 years |
| Michael Joughin | Director | 30 Mar 1990 | 31 Mar 1993 | British | 100 years |
| Nicholas George Lawrence Timpson | Director | 14 Dec 1998 | 26 Jun 2003 | British | 85 years |
| Nicholas Peter Baldwin | Director | 1 Sept 2006 | 1 Apr 2011 | British | 74 years |
| Paul Anthony Brady | Director | 1 Apr 1989 | 30 Mar 1990 | British | 77 years |
| Paul Morton Alistair Phillips-davies | Director | 1 Jan 2002 | 17 Jul 2025 | British | 59 years |
| Peter Everett | Director | 30 Mar 1990 | 31 May 1998 | British | 95 years |
| Peter James Grant | Director | 30 Mar 1990 | 5 Dec 1994 | British | 97 years |
| Peter John Lynas | Director | 1 Jul 2014 | 20 Jul 2023 | British | 68 years |
| Peter Stormonth Darling | Director | 1 Oct 1994 | 27 Jul 2000 | British | 94 years |
| Rene Medori | Director | 26 Jun 2003 | 25 Jun 2012 | French | 69 years |
| Richard Dunnell Gillingwater | Director | 25 May 2007 | 31 Mar 2021 | British | 70 years |
| Sally Fairbairn | Secretary | 1 Dec 2014 | 1 Aug 2023 | - | - |
| Secretary Of State For Scotland | Corporate Director | 27 Mar 1990 | 18 Jun 1991 | - | - |
| Susan Ilene Rice | Director | 24 Apr 2003 | 17 Jul 2014 | American | 80 years |
| Susan Margaret Bruce | Director | 1 Sept 2013 | 31 Mar 2023 | British | 71 years |
| The Lord Smith Of Kelvin | Director | 26 Jun 2003 | 23 Jul 2015 | British | 82 years |
| Thomas Thune Andersen | Director | 1 Jan 2009 | 17 Jul 2014 | Danish | 71 years |