| Adam Charles Greenslade | Director | 1 Mar 2017 | 1 Oct 2023 | British | 45 years |
| Alasdair James Dougall Locke | Director | 19 May 1999 | 18 Oct 2002 | British | 73 years |
| Anthony David Cocker | Director | 16 Jul 2001 | 13 Sept 2001 | British | 67 years |
| Benjamin James Freeman | Director | 1 Jul 2020 | 30 Apr 2022 | British | 49 years |
| Carol Wood | Director | 19 May 1999 | 1 Jul 2002 | British | 72 years |
| Cathal Oliver Hennessy | Director | 12 May 2021 | 5 Oct 2025 | Irish | 46 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 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 | - |
| Ian Philip Johnson | Director | 10 Dec 2012 | 30 Jun 2015 | British | 59 years |
| 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 Scagell | Director | 31 Mar 2004 | 19 Dec 2006 | British | 59 years |
| Jonathan Mark Henderson | Director | 28 Feb 2022 | 22 Mar 2024 | British | 45 years |
| Keith Plowman | Director | 19 Dec 2006 | 1 Jan 2008 | British | 68 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 |
| Michael John Lawrence Salter | Director | 19 May 1999 | 18 Oct 2002 | British | 79 years |
| Nia Ann Griffiths | Director | 1 Oct 2023 | 22 Mar 2024 | Welsh | 37 years |
| Paul Mulvihill | Director | 10 Dec 2012 | 30 Jun 2016 | British | 67 years |
| Penelope Anne Sainsbury | Secretary | 1 Jul 2020 | 1 May 2024 | - | - |
| Robert John Kennett | Director | 19 May 1999 | 16 Jul 2001 | British | 76 years |
| Roland Sven Walter Flaig | Director | 1 Jul 2016 | 30 Jun 2020 | Swedish | 52 years |
| Tanya Elen Davies | Director | 1 Jul 2020 | 12 May 2021 | British | 52 years |
| Timothy James Bell | Director | 1 Jul 2016 | 30 Jun 2020 | British | 53 years |
