| Amec Nominees Limited | Corporate Director | 8 Jul 1994 | 21 Feb 2000 | United Kingdom | - |
| Amec Nominees Limited | Corporate Director | 1 Jan 2012 | 11 Aug 2020 | United Kingdom | - |
| Andrew Stuart Mclean | Director | 11 Aug 2020 | 31 Aug 2024 | British | 56 years |
| Bart Management Limited | Corporate Nominee Director | 26 Mar 1993 | 8 Jul 1994 | United Kingdom | - |
| Bart Management Limited | Corporate Nominee Secretary | 26 Mar 1993 | 8 Jul 1994 | United Kingdom | - |
| Bart Secretaries Limited | Corporate Nominee Director | 26 Mar 1993 | 8 Jul 1994 | United Kingdom | - |
| Christopher Laskey Fidler | Secretary | 22 Oct 1997 | 28 Mar 2000 | British | - |
| Christopher Laskey Fidler | Secretary | 16 Jun 2009 | 22 Jul 2016 | British | - |
| Colin Fellowes | Secretary | 26 Mar 1994 | 22 Oct 1997 | British | - |
| Colin Fellowes | Secretary | 28 Mar 2000 | 16 Jun 2009 | British | - |
| David Robson | Director | 21 Feb 2000 | 31 Jul 2003 | British | 81 years |
| Eleanor Bronwen Evans | Director | 31 Mar 2011 | 31 Dec 2011 | British | 60 years |
| Grant Richmond Ling | Director | 21 Feb 2000 | 15 Feb 2002 | British | 70 years |
| Grant Richmond Ling | Director | 31 Oct 2008 | 30 Nov 2017 | British | 70 years |
| Iain Angus Jones | Secretary | 16 Feb 2018 | 12 Jun 2024 | - | - |
| Ian Graeme Lloyd Charnock | Director | 1 Jul 2005 | 31 Oct 2008 | British | 64 years |
| Jennifer Ann Warburton | Secretary | 22 Jul 2016 | 16 Feb 2018 | - | - |
| Michael Blacker | Director | 26 Mar 2007 | 31 Mar 2011 | British | 71 years |
| Michael John Bardsley | Director | 8 Jul 1994 | 21 Feb 2000 | British | 82 years |
| Michael Straughen | Director | 21 Feb 2000 | 31 Dec 2006 | British | 76 years |
| Nigel Alan Higgins | Director | 11 Mar 2002 | 1 Jul 2005 | British | 70 years |
| Nigel James Maxwell Davies | Director | 8 Jul 1994 | 15 Sept 1995 | British | 72 years |
| Richard John Corke | Director | 21 Feb 2000 | 31 Jan 2003 | British | 77 years |
| Richard Peter Shuttleworth | Director | 11 Mar 2002 | 26 Mar 2006 | British | 65 years |
| William George Setter | Director | 30 Nov 2017 | 21 Mar 2025 | British | 51 years |