| Alan Malcolm Meikle | Director | 11 Dec 2006 | 29 Feb 2008 | British | 53 years |
| Andrew Gordon Jefferson | Director | 5 May 2000 | 31 May 2002 | British | 63 years |
| Andrew Gordon Lawson | Director | 24 Jun 1994 | 3 Apr 1998 | British | 69 years |
| Anthony Donnelly | Director | 19 Dec 2008 | 27 Feb 2015 | British | 62 years |
| David Anthony Roberts | Director | 16 Jul 2002 | 16 Jul 2004 | British | 60 years |
| David Charles Turner | Secretary | 19 Aug 2002 | 1 Jul 2005 | Other | - |
| David Iain Logue | Director | 16 Jul 2004 | 31 Dec 2009 | British | 68 years |
| David Roger Artis | Director | 15 Jun 2018 | 16 Sept 2019 | British | 52 years |
| Elizabeth Ann Horlock Clarke | Secretary | 1 Apr 2015 | 22 May 2020 | - | - |
| Elizabeth Fathi | Director | 24 Jun 1994 | 20 Jul 2003 | British | 63 years |
| Geoffrey Arthur George Shepheard | Secretary | 23 Aug 2004 | 31 Mar 2015 | British | - |
| Ian Mcardle | Director | 23 Apr 2003 | 24 Dec 2004 | British | 60 years |
| Jacqueline Elizabeth Fox | Secretary | 14 Jun 2001 | 17 May 2002 | British | - |
| John Alexander Hope | Director | 3 May 2008 | 19 Dec 2008 | British | 69 years |
| John Colin Gray | Director | 24 Jun 1994 | 5 May 2000 | British | 75 years |
| John Morrison | Secretary | 13 Jun 1997 | 14 Jun 2001 | British | - |
| K & S Directors Limited | Corporate Nominee Director | 21 Mar 1994 | 24 Jun 1994 | United Kingdom | - |
| K & S Secretaries Limited | Corporate Nominee Secretary | 21 Mar 1994 | 24 Jun 1994 | United Kingdom | - |
| Lesley Ann Wallace | Director | 11 Jan 2005 | 1 Sept 2006 | British | 56 years |
| Mario John Holligan | Director | 30 Jun 2017 | 15 Jun 2018 | British | 52 years |
| Martin Johnson Winward | Director | 3 Apr 1998 | 5 May 2000 | British | 75 years |
| Michael Idris Davies | Director | 24 Jun 1994 | 19 Jul 2010 | British | 80 years |
| Nigel Edmund Pacey | Director | 16 Sept 2019 | 22 May 2020 | British | 69 years |
| Peter Russell | Director | 5 May 2000 | 23 Apr 2003 | British | 70 years |
| Peter Russell | Secretary | 24 Jun 1994 | 13 Jun 1997 | British | - |
| Roderick Mark Prime | Director | 27 Feb 2015 | 30 Jun 2017 | British | 60 years |
| Seamus Joseph Gillen | Secretary | 17 May 2002 | 19 Aug 2002 | British | - |