| DJM SECRETARIAL SERVICES LIMITED ACTIVE | Secretary | 28 Apr 2014 | | | | 16, Mallard Way, Riverside Business Park, Swansea Vale, Swansea, SA7 0AJ, Wales |
| GOODSON, Paul ACTIVE | Director | 11 Oct 2012 | | United Kingdom | April 1962 | Sse Plc, Keadby Power Station, Trentside, Keadby, DN17 3EF, United Kingdom |
| JAMESON, Simon Andrew ACTIVE | Director | 03 Apr 2017 | | England | February 1961 | Severn Power Station, West Nash Road, Nash, Newport, NP18 2BZ, Wales |
| MACSWEEN, Alasdair Macaulay ACTIVE | Director | 11 Oct 2012 | | Scotland | February 1961 | Inveralmond House, 200 Dunkeld Road, Perth, PH1 3AQ, Scotland |
| A G SECRETARIAL LIMITED RESIGNED | Secretary | 01 Jan 2004 | 31 Oct 2009 | | | 100 Barbirolli Square, Manchester, M2 3AB |
| CLIFFORD CHANCE SECRETARIES LIMITED RESIGNED | Secretary | 15 Sep 1999 | 31 Dec 2003 | | | 10 Upper Bank Street, London, E14 5JJ |
| OAKWOOD CORPORATE SECRETARY LIMITED RESIGNED | Secretary | 01 Nov 2009 | 23 Nov 2012 | | | Webber House, 26-28 Market Street, Altrincham, Cheshire, WA14 1PF |
| BEALE, Prudence RESIGNED | Director | 02 Feb 2000 | 26 Sep 2003 | | November 1966 | 15 Evelyn Road, Richmond, TW9 2TF |
| CARTLEDGE, Andrew RESIGNED | Director | 24 Jun 2002 | 26 Oct 2003 | | June 1969 | 30 Trailside Road, Weston, MA 02493, United States |
| CHARLTON, Peter John RESIGNED | Nominee Director | 15 Sep 1999 | 02 Feb 2000 | | December 1955 | 17 Kirkdale Road, Harpenden, Hertfordshire, AL5 2PT |
| CHRISTIE, Roderick Angus RESIGNED | Director | 24 Jun 2002 | 16 Sep 2004 | | April 1962 | 14 Oakfield Road, Bourne End, Buckinghamshire, SL8 5QN |
| CLARK, Alyson Margaret RESIGNED | Director | 24 Jun 2002 | 22 Aug 2011 | United Kingdom | September 1958 | The Arena, Downshire Way, Bracknell, Berkshire, RG12 1PU, United Kingdom |
| DANIELL, Paul Nigel RESIGNED | Director | 02 Feb 2000 | 06 Nov 2002 | | February 1961 | 7 Lucerne Drive, Stadhampton, Oxford, Oxfordshire, OX44 7QT |
| DIGBY, Mark Damien RESIGNED | Director | 07 Feb 2005 | 03 Oct 2006 | | April 1961 | Calle Valle Del Roncal 71,, Las Lomas, Boadilla Del Monte, Madrid, 28660, Spain |
| EVERETT, Peter Daryl RESIGNED | Director | 18 Jan 2008 | 11 Oct 2012 | England | January 1962 | The Arena, Downshire Way, Bracknell, Berkshire, RG12 1PU, United Kingdom |
| HAGGAN, James RESIGNED | Director | 17 Oct 2016 | 31 Mar 2017 | England | May 1959 | 16 Axis Way, Mallard Way, Swansea Vale, Swansea, SA7 0AJ |
| HEPPENSTALL, Bruce Michael Amos RESIGNED | Director | 24 Mar 2006 | 18 Oct 2012 | Wales | May 1970 | The Arena, Downshire Way, Bracknell, Berkshire, RG12 1PU, United Kingdom |
| HIGGINBOTHAM, Michael David RESIGNED | Director | 11 Dec 2015 | 06 Feb 2024 | England | September 1977 | Severn Power Station, West Nash Road, Nash, Newport, Gwent, NP18 2BZ, Wales |
| KEENAN, John Joseph RESIGNED | Director | 01 Aug 2005 | 24 Oct 2007 | | November 1966 | 5 Gresham Road, Brentwood, Essex, CM14 4HN |
| LOWE, James Alfred RESIGNED | Director | 02 Feb 2000 | 22 Dec 2005 | | October 1956 | Red Lodge, Bishops Heath, Bishopsgate Road, Englefield Green, Egham, Surrey, TW20 0YJ |
| MCCULLOUGH, Kevin RESIGNED | Director | 23 Feb 2015 | 17 Oct 2016 | United Kingdom | September 1965 | West Nash Road, West Nash Road, Nash, Newport, Gwent, NP18 2BZ, Wales |
| MCLEISH, Douglas Stuart RESIGNED | Director | 19 Jun 2013 | 11 Dec 2015 | England | February 1965 | Ropemaker Place, 28 Ropemaker Street, London, EC2Y 9HD, England |
| MULHOLLAND, Diarmaid Patrick RESIGNED | Director | 03 Oct 2006 | 21 Jul 2010 | Italy | May 1971 | The Arena, Downshire Way, Bracknell, Berkshire, RG12 1PU, United Kingdom |
| PARSONS, Gordon Ian Winston RESIGNED | Director | 18 Oct 2012 | 19 Jun 2013 | England | September 1967 | Ropemaker Place, 28 Ropemaker Street, London, EC2Y 9HD, United Kingdom |
| PATERSON, Robert Murray RESIGNED | Director | 19 Jun 2013 | 31 Dec 2014 | England | September 1968 | 16 Axis Way, Mallard Way, Swansea Vale, Swansea, SA7 0AJ, Wales |
| PROBERT, Stephen William RESIGNED | Director | 09 Mar 2001 | 11 Oct 2012 | | January 1969 | The Arena, Downshire Way, Bracknell, Berkshire, RG12 1PU, United Kingdom |
| RICHARDS, Martin Edgar RESIGNED | Nominee Director | 15 Sep 1999 | 02 Feb 2000 | | February 1943 | 89 Thurleigh Road, London, SW12 8TY |
| TON, Gwaine William RESIGNED | Director | 12 Sep 2003 | 20 Jul 2005 | | July 1958 | Beech Hill Lodge, Ridgemead Road, Englefield Green, Egham, Surrey, TW20 0YD |
| WAKE, Hilary Anne, Mrs. RESIGNED | Director | 07 Feb 2005 | 18 Oct 2012 | United Kingdom | August 1959 | The Arena, Downshire Way, Bracknell, Berkshire, RG12 1PU, United Kingdom |
| WALBRIDGE, Jonathan Paul RESIGNED | Director | 18 Oct 2012 | 19 Jun 2013 | United Kingdom | August 1978 | Ropemaker Place, 28 Ropemaker Street, London, EC2Y 9HD, United Kingdom |
| WARE, Henry John RESIGNED | Director | 02 Feb 2000 | 19 Feb 2001 | | January 1965 | 54 Kitsbury Road, Berkhamsted, Hertfordshire, HP4 3EA |