| Anthony Steven Ainsworth | Director | 2 Jul 2012 | 28 Jan 2016 | British | 58 years |
| Brian Jefferson Tear | Director | 30 Sept 2011 | 12 Jun 2012 | British | 58 years |
| Company Directors Limited | Corporate Nominee Director | 12 Jun 1997 | 12 Jun 1997 | United Kingdom | - |
| David Charles Adrian Baumber | Director | 19 Nov 2021 | 31 Mar 2023 | British | 52 years |
| Deborah Gandley | Director | 22 Aug 2016 | 14 Dec 2020 | British | 55 years |
| Derek Cottrell | Director | 19 Aug 1998 | 13 Jun 2000 | British | 97 years |
| Derek Cottrell | Secretary | 19 Aug 1998 | 29 Mar 2000 | British | - |
| E.on Uk Directors Limited | Corporate Director | 20 Apr 2007 | 30 Sept 2010 | United Kingdom | - |
| E.on Uk Directors Limited | Corporate Director | 30 Sept 2011 | 2 Jul 2012 | United Kingdom | - |
| E.on Uk Secretaries Limited | Corporate Secretary | 17 Jun 2005 | 22 Aug 2016 | United Kingdom | - |
| Fiona Scott Stark | Director | 12 Jun 2012 | 31 Dec 2016 | British | 64 years |
| Florrie Darwell | Director | 12 Jun 1997 | 17 Nov 1998 | British | 113 years |
| Graham John Bartlett | Director | 4 Jul 2007 | 30 Sept 2011 | British | 70 years |
| James Anthony Thomas | Director | 23 Oct 2003 | 17 Jun 2005 | Welsh | 73 years |
| Jeffrey Woosnam Morgan | Director | 1 Jul 2000 | 17 Jun 2005 | British | 70 years |
| Jose Roberto Davila | Director | 14 Dec 2020 | 14 Aug 2024 | British | 57 years |
| Mandy Newton | Director | 24 Aug 2000 | 11 Oct 2000 | British | 67 years |
| Mary Delia Clarke | Director | 28 Aug 2015 | 15 Aug 2016 | Irish | 62 years |
| Michael Lindsay Thomas | Director | 30 Sept 2010 | 30 Sept 2011 | Australian | 56 years |
| Michael Robert French | Director | 14 Dec 2020 | 31 Oct 2021 | German | 58 years |
| Nicholas Wenham Horler | Director | 17 Jun 2005 | 4 Jul 2007 | British | 67 years |
| Peter Darwell | Director | 19 Jun 2003 | 17 Jun 2005 | British | 77 years |
| Peter Darwell | Secretary | 12 Jun 1997 | 19 Aug 1998 | British | - |
| Philip George Biddle | Director | 17 Jun 2005 | 20 Apr 2007 | British | 68 years |
| Robin John Fuller | Director | 29 Jan 1999 | 17 Jun 2005 | British | 77 years |
| Robin John Fuller | Secretary | 29 Mar 2000 | 17 Jun 2005 | British | - |
| Ronald John Kirk | Director | 19 Aug 1998 | 17 Jun 2005 | British | 77 years |
| Sara Lyn Vaughan | Director | 22 Mar 2017 | 26 Nov 2020 | British | 62 years |
| Simon Leonard Christopher Richards | Director | 17 Jun 2005 | 30 Apr 2007 | British | 62 years |
| Temple Secretaries Limited | Corporate Nominee Secretary | 12 Jun 1997 | 12 Jun 1997 | - | - |