| Brian Jefferson Tear | Director | 4 Jul 2007 | 12 Jun 2012 | British | 58 years |
| Carol Wood | Director | 4 Oct 1999 | 1 Jul 2002 | British | 72 years |
| Colin Roger Scoins | Director | 1 Jul 2002 | 29 Apr 2005 | British | 71 years |
| David Charles Adrian Baumber | Director | 15 Aug 2016 | 3 Aug 2021 | British | 52 years |
| David John Jackson | Director | 8 May 1998 | 1 Jul 2002 | British | 73 years |
| David John Jackson | Secretary | 8 May 1998 | 4 Oct 1999 | British | - |
| E.on Uk Directors Limited | Corporate Director | 29 Apr 2005 | 15 Aug 2016 | United Kingdom | - |
| E.on Uk Secretaries Limited | Corporate Secretary | 31 Mar 2001 | 15 Aug 2016 | United Kingdom | - |
| Edmund Arthur Wallis | Director | 4 Oct 1999 | 31 Mar 2001 | British | 87 years |
| Edmund Arthur Wallis | Director | 1 Jul 2002 | 18 Jul 2003 | British | 87 years |
| Fiona Scott Stark | Director | 12 Jun 2012 | 15 Aug 2016 | British | 64 years |
| Graham John Bartlett | Director | 22 Mar 2004 | 4 Jul 2007 | British | 70 years |
| Instant Companies Limited | Corporate Nominee Director | 17 Apr 1998 | 8 May 1998 | United Kingdom | - |
| Jane Rowena Watts | Director | 1 Jul 2002 | 22 Mar 2004 | British | 67 years |
| John Anthony Hart | Director | 4 Oct 1999 | 1 Jul 2002 | British | 81 years |
| Martin Hamilton Hannah | Director | 4 Oct 1999 | 31 Mar 2001 | British | 64 years |
| Michael Soehlke | Director | 1 Jul 2002 | 22 Mar 2004 | German | 67 years |
| Peter Charles Fletcher Hickson | Director | 4 Oct 1999 | 1 Jul 2002 | British | 81 years |
| Peter Robert Hughes | Director | 4 Oct 1999 | 31 Mar 2001 | British | 78 years |
| René Matthies | Director | 2 Jul 2012 | 31 May 2016 | German | 56 years |
| Rodney George Barber | Director | 8 May 1998 | 4 Oct 1999 | British | 80 years |
| Simon Glyn Alexander Durbin | Secretary | 4 Oct 1999 | 31 Mar 2001 | British | - |
| Swift Incorporations Limited | Corporate Nominee Secretary | 17 Apr 1998 | 8 May 1998 | United Kingdom | - |