| Adam Nathaniel Richford | Director | 25 Feb 2016 | 7 Feb 2017 | British | 50 years |
| Alan Duncan Patrickson | Director | 7 May 2003 | 1 Dec 2005 | British | 62 years |
| Alan William Fullerton Mcvicker | Director | 25 Jan 2006 | 21 Jul 2006 | British | 59 years |
| Brian James Martin | Director | 16 Jan 2003 | 14 May 2004 | British | 61 years |
| Burness | Corporate Nominee Secretary | 6 Jun 2001 | 27 Jul 2001 | - | - |
| Burness (directors) Limited | Corporate Nominee Director | 6 Jun 2001 | 27 Jul 2001 | United Kingdom | - |
| Christopher Surch | Director | 1 May 2009 | 29 Oct 2010 | British | 65 years |
| David John Downes | Director | 27 Jul 2001 | 31 Dec 2005 | British | 81 years |
| David Kevin Mulligan | Director | 10 Feb 2014 | 31 Mar 2015 | British | 57 years |
| Dominic Pieter James Murray | Secretary | 1 Jun 2023 | 10 Oct 2024 | - | - |
| Fraser Andrew Norton Welham | Director | 1 Jan 2006 | 27 May 2009 | British | 62 years |
| Ian Frederick Goodfellow | Director | 16 Jul 2004 | 31 Mar 2013 | British | 72 years |
| James Robert Meredith | Director | 27 Jul 2001 | 31 Mar 2003 | British | 66 years |
| Jeremy John Cobbett Simpson | Director | 22 Oct 2012 | 31 Mar 2014 | British | 55 years |
| Joanne Elizabeth Taunton Lewis | Secretary | 10 Oct 2001 | 24 Oct 2008 | British | - |
| Julian Ashley Tranter | Director | 29 Jan 2010 | 7 Apr 2011 | British | 59 years |
| Mark Alfred Cowan | Director | 14 Nov 2018 | 8 Nov 2019 | British | 56 years |
| Mark Andrew Rawling | Director | 14 Nov 2018 | 30 Nov 2020 | British | 47 years |
| Mark Ian Saunders | Director | 1 Jul 2009 | 5 Aug 2009 | British | 58 years |
| Michael Andrew Turner | Director | 7 Feb 2017 | 22 Nov 2018 | British | 59 years |
| Michael Charles Edward Averill | Director | 27 Jul 2001 | 30 Sept 2007 | British | 75 years |
| Michael James Clarke | Director | 27 Jul 2001 | 30 Apr 2005 | British | 68 years |
| Nigel Frank Catling | Director | 1 Apr 2015 | 30 Nov 2016 | British | 68 years |
| Nigel Ian Aitchison | Director | 1 Aug 2006 | 23 Jan 2008 | British | 58 years |
| Peter Damian Eglinton | Director | 15 Apr 2013 | 31 Mar 2015 | British | 57 years |
| Philip Bernard Griffin-smith | Secretary | 24 Oct 2008 | 31 May 2023 | British | - |
| Richard Dexter Lucas | Director | 24 Aug 2001 | 16 Jan 2003 | British | 64 years |
| Robert Ian Cartwright | Director | 30 Apr 2005 | 13 Oct 2009 | British | 71 years |
| Robert Ian Cartwright | Director | 1 Apr 2015 | 25 Feb 2016 | British | 71 years |
| Robin Bruce Stevenson | Director | 21 Mar 2011 | 25 Sept 2012 | British | 58 years |
| Roy Kyle | Director | 1 Dec 2020 | 8 Dec 2022 | British | 65 years |
| Sara Philipa Cannon | Secretary | 27 Jul 2001 | 10 Oct 2001 | British | - |
| Stephen Leslie Ray | Director | 23 Jan 2008 | 29 Jan 2010 | British | 53 years |