| Adrian Joseph Chatterton | Director | 16 May 2007 | 1 Jan 2008 | British | 63 years |
| Adrian Joseph Chatterton | Director | 10 Dec 2012 | 20 Dec 2022 | British | 63 years |
| Alasdair James Dougall Locke | Director | 19 May 1999 | 18 Oct 2002 | British | 73 years |
| Alice Kyne Delahunty | Director | 22 Oct 2015 | 31 Mar 2018 | Irish | 45 years |
| Anthony David Cocker | Director | 16 Jul 2001 | 13 Sept 2001 | British | 67 years |
| Carol Wood | Director | 19 May 1999 | 1 Jul 2002 | British | 72 years |
| Chantal Thomas | Secretary | 21 May 2001 | 1 Jul 2002 | British | - |
| Daniel Steven Shaw | Director | 16 May 2007 | 1 Mar 2017 | British | 68 years |
| David Allen Farrier | Director | 16 May 2007 | 10 Dec 2012 | British | 76 years |
| David Gerald Rogers | Director | 1 Jan 2008 | 10 Dec 2012 | British | 72 years |
| E.on Uk Secretaries Limited | Corporate Secretary | 10 Dec 2012 | 30 Sept 2019 | United Kingdom | - |
| Fiona Scott Stark | Director | 1 Jul 2002 | 19 Dec 2006 | British | 64 years |
| Ian Peter Fairclough | Director | 19 Dec 2006 | 16 May 2007 | British | 65 years |
| Ian Peter Fairclough | Secretary | 17 May 2000 | 21 May 2001 | British | - |
| Ian Peter Fairclough | Secretary | 1 Jul 2002 | 13 Jul 2012 | British | - |
| Ingleby Holdings Limited | Corporate Nominee Director | 23 Apr 1999 | 19 May 1999 | United Kingdom | - |
| Ingleby Nominees Limited | Corporate Nominee Secretary | 23 Apr 1999 | 19 May 1999 | United Kingdom | - |
| Jason Anthony Keene | Secretary | 31 Mar 2020 | 30 Jun 2020 | - | - |
| Jason Scagell | Director | 31 Mar 2004 | 19 Dec 2006 | British | 59 years |
| Jill Anne Lees | Director | 1 Jul 2020 | 31 Dec 2022 | British | 65 years |
| Keith Plowman | Director | 19 Dec 2006 | 1 Jan 2008 | British | 68 years |
| Marcus Peters | Director | 1 Jan 2023 | 29 Nov 2024 | British | 56 years |
| Mark Lindsay Bygraves | Secretary | 19 May 1999 | 17 May 2000 | British | - |
| Mark Robert Draper | Director | 13 Sept 2001 | 31 Mar 2004 | British | 63 years |
| Martin Andre-ferreira | Director | 3 Mar 2022 | 31 Mar 2022 | British | 48 years |
| Matthew James Swanwick | Director | 29 Jun 2016 | 30 Jun 2020 | British | 59 years |
| Matthew John Britton | Director | 1 May 2015 | 29 Jun 2016 | British | 71 years |
| Michael John Lawrence Salter | Director | 19 May 1999 | 18 Oct 2002 | British | 79 years |
| Paul John Webster | Director | 7 Apr 2008 | 22 Jun 2012 | British | 71 years |
| Paul Mulvihill | Director | 10 Dec 2012 | 22 Oct 2015 | British | 67 years |
| Phillipa Louise Slater | Director | 1 Jan 2023 | 27 Oct 2023 | British | 46 years |
| Richard Jennings Sandford | Director | 1 Jul 2020 | 31 Dec 2021 | British | 55 years |
| Robert John Kennett | Director | 19 May 1999 | 16 Jul 2001 | British | 76 years |
| Thomas Michel | Director | 18 Jun 2018 | 30 Jun 2020 | German | 48 years |
| Tim Stefan Moritz | Director | 1 Mar 2017 | 30 Jun 2020 | German | 53 years |
| Timothy James Bell | Director | 1 Mar 2017 | 30 Jun 2020 | British | 53 years |
| Timothy John Forrest | Director | 10 Dec 2012 | 31 Mar 2014 | British | 62 years |
| Vian Robert Davys | Director | 1 Jan 2008 | 10 Dec 2012 | British | 58 years |