| Adrian John Bannister | Director | 30 Jan 1998 | 5 Aug 2010 | British | 62 years |
| Andrew Lundie Glen | Director | 1 Sept 2011 | 17 Sept 2014 | British | 63 years |
| David Cockburn | Director | 1 Oct 1994 | 10 Jan 2011 | British | 72 years |
| David John Barrass | Director | 30 Jan 1998 | 22 Sept 2000 | British | 75 years |
| Douglas Alan Sedge | Director | 25 Nov 2009 | 7 Apr 2014 | British | 71 years |
| Ewen Kerr | Director | 24 Jun 2015 | 17 May 2023 | British | 58 years |
| Gareth Trevor Brown | Secretary | 30 Jan 1998 | 22 Sept 2000 | British | - |
| Graham Thomson | Director | 1 Jan 2001 | 30 Jun 2010 | British | 67 years |
| Grayston Central Services Limited | Corporate Director | 1 Jun 1992 | 4 Aug 1998 | United Kingdom | - |
| James Christie Falconer Wilde | Director | 6 Dec 1996 | 17 Jul 1997 | British | 73 years |
| John Richard Cowie | Director | 1 Jun 1992 | 12 Dec 1996 | British | 74 years |
| John Robert Jordan | Director | 1 Jan 2005 | 25 Nov 2009 | American | 70 years |
| Kenneth Barnes | Director | 1 Jun 1992 | 30 Jun 1993 | British | 92 years |
| Kenneth Myles Scott | Director | 1 Jun 1992 | 27 Oct 2006 | British | 75 years |
| Leigh James Howarth | Director | 10 Jan 2011 | 31 Aug 2011 | British | 62 years |
| Maclay Murray & Spens Llp | Corporate Nominee Secretary | 31 Mar 2008 | 7 Feb 2011 | United Kingdom | - |
| Malcolm Wilson | Director | 1 Jun 1992 | 31 Mar 2010 | British | 80 years |
| Martin Andrew Pexton | Director | 30 Jul 2003 | 31 Mar 2008 | British | 70 years |
| Md Secretaries Limited | Corporate Secretary | 15 Feb 2011 | 5 Nov 2012 | United Kingdom | - |
| Neil Austin Johnson | Director | 17 Sept 2014 | 17 May 2023 | British | 57 years |
| Nicholas Robert Friedlos | Director | 31 Mar 2002 | 30 Jan 2007 | British | 69 years |
| Paull & Williamsons | Corporate Secretary | 22 Sept 2000 | 31 Mar 2008 | United Kingdom | - |
| Plant Nominees Limited | Corporate Director | 1 Jun 1992 | 4 Aug 1998 | - | - |
| Plant Nominees Limited | Corporate Secretary | 1 Jun 1992 | 30 Jan 1998 | - | - |
| Raymond John Hart | Director | 31 Aug 1993 | 24 May 1996 | British | 81 years |
| Richard Alexander Wilson | Director | 10 Jan 2011 | 6 Oct 2014 | British | 61 years |
| Robert Anthony Rayne | Director | 31 Mar 2003 | 31 Mar 2008 | British | 77 years |
| Stewart Andrew Alan Mitchell | Director | 7 Apr 2014 | 17 May 2023 | British | 60 years |