| Andrew James Duxbury | Director | 9 Jun 2016 | 5 Apr 2017 | British | 51 years |
| Anthony Donnelly | Director | 1 Jul 2002 | 5 Dec 2003 | British | 62 years |
| David Charles Turner | Secretary | 19 Aug 2002 | 24 Feb 2006 | Other | - |
| David John Jeffs | Director | 5 Dec 2003 | 11 Oct 2005 | British | 77 years |
| Geoffrey Arthur George Shepheard | Secretary | 23 Aug 2004 | 31 Mar 2006 | British | - |
| Iain Alasdair Robertson | Director | 23 Oct 2000 | 1 Jul 2002 | British | 77 years |
| Ian George Smith | Director | 5 Dec 2003 | 6 May 2005 | British | 84 years |
| Jacqueline Elizabeth Fox | Secretary | 14 Jun 2001 | 17 May 2002 | British | - |
| John Morrison | Director | 3 Feb 2000 | 14 Jun 2001 | British | 77 years |
| John Morrison | Secretary | 17 Sept 1997 | 14 Jun 2001 | British | - |
| Keith Martin Howell | Director | 17 Sept 1997 | 3 Feb 2000 | British | 70 years |
| Kenneth Gillespie | Director | 5 Dec 2003 | 31 Mar 2006 | British | 61 years |
| Martin Cooper | Director | 30 Jun 2017 | 30 Jun 2019 | British | 55 years |
| Md Directors Limited | Corporate Nominee Director | 16 Sept 1997 | 17 Sept 1997 | United Kingdom | - |
| Md Secretaries (edinburgh) Limited | Corporate Secretary | 16 Sept 1997 | 17 Sept 1997 | United Kingdom | - |
| Michael Keith | Director | 5 Dec 2003 | 9 Jun 2016 | British | 67 years |
| Michael Robert Le Lorrain | Director | 31 Jan 2005 | 30 Jun 2017 | British | 70 years |
| Neil David Cocker | Director | 30 Jun 2019 | 1 Apr 2025 | British | 60 years |
| Richard Barraclough | Secretary | 30 Jun 2006 | 29 Feb 2012 | British | - |
| Robert David Green | Director | 12 Oct 1999 | 23 Oct 2000 | British | 71 years |
| Robin Patrick Lawson | Director | 17 Sept 1997 | 12 Oct 1999 | British | 80 years |
| Seamus Joseph Gillen | Secretary | 17 May 2002 | 19 Aug 2002 | British | - |