| Anthony Donnelly | Director | 16 Nov 1998 | 26 Feb 1999 | British | 62 years |
| Anthony Donnelly | Director | 19 Dec 2008 | 27 Feb 2015 | British | 62 years |
| Anthony Thomas | Director | 21 May 2007 | 19 Dec 2008 | British | 54 years |
| Brian James Leith | Director | 16 Nov 1998 | 30 Sept 2002 | British | 80 years |
| David Charles Turner | Secretary | 19 Aug 2002 | 8 Aug 2005 | Other | - |
| David George Pople | Director | 21 May 2007 | 19 Dec 2008 | British | 75 years |
| David Iain Logue | Director | 12 Apr 2006 | 21 May 2007 | British | 68 years |
| David Samuel Kennedy | Director | 1 Feb 2005 | 12 Apr 2006 | British | 68 years |
| Elizabeth Ann Horlock Clarke | Secretary | 1 Apr 2015 | 22 May 2020 | - | - |
| Ewan William Mackay | Director | 26 Feb 1999 | 31 Jan 2005 | British | 64 years |
| Geoffrey Arthur George Shepheard | Secretary | 23 Aug 2004 | 31 Mar 2015 | British | - |
| George Walker | Director | 16 Nov 1998 | 1 Mar 1999 | British | 81 years |
| Jacqueline Elizabeth Fox | Secretary | 14 Jun 2001 | 17 May 2002 | British | - |
| John Alexander Hope | Director | 15 Mar 2005 | 21 May 2007 | British | 69 years |
| John Angus Macdonald Smeaton | Director | 30 Aug 2001 | 30 Apr 2006 | British | 78 years |
| John Joseph Sheridan | Director | 16 Nov 1998 | 24 Aug 2001 | British | 74 years |
| John Morrison | Secretary | 16 Nov 1998 | 14 Jun 2001 | British | - |
| Mario John Holligan | Director | 17 Jul 2017 | 15 Jun 2018 | British | 52 years |
| Nigel Edmund Pacey | Director | 19 Dec 2008 | 22 May 2020 | British | 69 years |
| Paul George Rosie | Director | 30 Apr 2006 | 31 Dec 2015 | British | 72 years |
| Philip John Hutchins | Director | 30 Aug 2001 | 1 Mar 2003 | British | 73 years |
| Queensferry Formations Limited | Corporate Nominee Director | 16 Nov 1998 | 16 Nov 1998 | United Kingdom | - |
| Queensferry Registrations Limited | Corporate Nominee Director | 16 Nov 1998 | 16 Nov 1998 | United Kingdom | - |
| Queensferry Secretaries Limited | Corporate Nominee Secretary | 16 Nov 1998 | 18 Nov 1998 | United Kingdom | - |
| Roderick Mark Prime | Director | 27 Feb 2015 | 30 Jun 2017 | British | 60 years |
| Seamus Joseph Gillen | Secretary | 17 May 2002 | 19 Aug 2002 | British | - |
| Simon Barrett | Director | 1 Mar 2003 | 31 Dec 2018 | British | 65 years |