| Alan James Chaplin | Director | 22 Jan 2015 | 24 Dec 2015 | British | 65 years |
| Alan John Wilson | Director | 29 Nov 2007 | 31 Mar 2010 | British | 68 years |
| Alan Thomas Pilbeam | Director | 24 Feb 2016 | 12 Jul 2017 | British | 59 years |
| Andrew Brian Meadows | Director | 12 Jul 2017 | 7 Oct 2020 | British | 63 years |
| Andrew Joseph Heath | Director | 20 Nov 2003 | 24 May 2023 | British | 62 years |
| Antoine Jan Macgiel Valk | Director | 20 Jul 2003 | 26 Jan 2006 | Dutch | 77 years |
| Bartholomeus Cornelis Schmeink | Director | 1 Nov 2007 | 1 Dec 2011 | Dutch | 58 years |
| Brian Robert Burdsall | Director | 20 Jul 2003 | 31 Dec 2005 | British | 79 years |
| Christopher Kimberley | Director | 30 Oct 2014 | 15 Apr 2015 | British | 70 years |
| David Andrew Kaye | Director | 7 Oct 2020 | 24 May 2023 | British | 64 years |
| David Ronald Temple | Director | 24 Jan 2008 | 1 Mar 2010 | British | 68 years |
| David Ronald Temple | Director | 1 Nov 2012 | 24 May 2013 | British | 68 years |
| David Stretch | Director | 15 May 2013 | 31 Dec 2016 | British | 58 years |
| Dla Nominees Limited | Corporate Nominee Director | 21 Jan 2002 | 3 Apr 2002 | - | - |
| Dla Secretarial Services Limited | Corporate Nominee Director | 21 Jan 2002 | 3 Apr 2002 | - | - |
| Dla Secretarial Services Limited | Corporate Nominee Secretary | 21 Jan 2002 | 3 Apr 2002 | - | - |
| Emma Jane Jestin | Director | 17 Jun 2020 | 10 Jun 2022 | British | 43 years |
| Francesca Anne Todd | Secretary | 20 Jul 2003 | 31 May 2006 | British | - |
| Gary Shilston | Director | 19 Feb 2014 | 31 Mar 2017 | British | 59 years |
| Hendrikus Petrus Maria Verwer | Director | 20 Jul 2003 | 1 Nov 2007 | Netherlands | 66 years |
| Ian Mclaren | Director | 3 Sept 2004 | 9 Feb 2007 | British | 58 years |
| Ian Peter Bullock | Director | 20 Jul 2003 | 20 Oct 2003 | British | 59 years |
| Irene Judith Doosje | Director | 20 Jul 2003 | 12 Jul 2006 | Netherlands | 52 years |
| James Alexander Lewis Grundy | Director | 24 May 2023 | 31 Oct 2023 | British | 47 years |
| Jan Chaudhry | Director | 22 Mar 2012 | 9 Dec 2017 | British | 59 years |
| Jane Christine English | Director | 5 Jan 2018 | 29 Nov 2023 | British | 54 years |
| Jeremy Paul Bowen | Director | 6 Oct 2011 | 31 Jan 2020 | British | 54 years |
| Jeroen Marcel Weimar | Director | 31 Mar 2010 | 26 Mar 2012 | Dutch | 57 years |
| Joanne Roberts | Director | 17 May 2012 | 19 Feb 2014 | British | 57 years |
| John Alexander Skinner | Director | 20 Jul 2003 | 3 Sept 2004 | British | 74 years |
| John Anthony Richard Whitehurst | Director | 16 May 2018 | 20 Mar 2024 | British | 55 years |
| John David Wilkinson | Director | 3 Apr 2002 | 20 Jul 2003 | British | 82 years |
| John David Wilkinson | Secretary | 3 Apr 2002 | 20 Jul 2003 | British | - |
| John Hamilton Curley | Director | 8 Sept 2011 | 4 Oct 2012 | British | 72 years |
| John Michael Heron | Director | 29 Mar 2017 | 23 Feb 2023 | British | 54 years |
| Jonathan David Brown | Director | 19 Apr 2012 | 1 Nov 2013 | British | 62 years |
| Julian Edwards | Director | 8 Sept 2011 | 25 Jan 2017 | British | 57 years |
| Keith Wallace | Director | 25 Jan 2017 | 31 Mar 2018 | British | 64 years |
| Kevin Arthur Thomas | Director | 23 Apr 2007 | 31 Dec 2011 | British | 51 years |
| Kevin Arthur Thomas | Director | 23 Dec 2013 | 22 Sept 2014 | British | 51 years |
| Lee Harvey Bartholomew | Director | 12 May 2005 | 29 Nov 2007 | British | 69 years |
| Lesley Anne Batty | Director | 21 Feb 2008 | 19 May 2011 | British | 65 years |
| Maarten Pieter Spaargaren | Director | 1 Dec 2011 | 31 Dec 2014 | Dutch | 58 years |
| Marie Antoinette Helene Wieman | Director | 8 Sept 2011 | 22 Mar 2012 | Dutch | 54 years |
| Martin Henry Beable | Director | 1 Nov 2023 | 2 Oct 2024 | British | 43 years |
| Matthew Charles Brown | Director | 1 Mar 2010 | 5 Jan 2012 | British | 54 years |
| Michael John Lockyear | Director | 20 Jul 2003 | 12 May 2005 | British | 75 years |
| Neil Scales | Director | 3 Apr 2002 | 20 Jul 2003 | British | 70 years |
| Nicholas James Forster Brown | Director | 1 Dec 2005 | 29 Nov 2007 | British | 67 years |
| Peter Brian Fisher | Director | 3 Apr 2002 | 20 Jul 2003 | British | 83 years |
| Peter Morton | Director | 5 Mar 2007 | 7 Oct 2011 | British | 56 years |
| Peter Van Toor | Director | 26 Jan 2006 | 31 Dec 2006 | Dutch | 66 years |
| Peter Van Toor | Director | 31 Dec 2006 | 24 Jan 2008 | Dutch | 66 years |
| Richard Hilarius Maria Emmerink | Director | 20 Jul 2003 | 23 Apr 2007 | Dutch | 56 years |
| Ryan Robert Flaherty | Director | 15 Apr 2015 | 9 Aug 2017 | British | 54 years |
| Serco Corporate Services Limited | Corporate Secretary | 31 May 2006 | 1 Aug 2023 | United Kingdom | - |