| VISTRA COSEC LIMITED ACTIVE | Secretary | 04 Apr 2024 | | | | Ground Floor, Templeback, 10 Temple Back, Bristol, BS1 6FL, United Kingdom |
| DAVIS, Todd Christopher ACTIVE | Director | 05 Dec 2022 | | United States | December 1960 | Suite 1, 7th Floor, 50 Broadway, London, SW1H 0DB, United Kingdom |
| ESPINOZA, Octavio ACTIVE | Director | 01 Nov 2022 | | United States | August 1970 | Suite 1, 7th Floor, 50 Broadway, London, SW1H 0DB, United Kingdom |
| REARDON, Andrew Thomas ACTIVE | Director | 01 Nov 2022 | | United States | October 1974 | Suite 1, 7th Floor, 50 Broadway, London, SW1H 0DB, United Kingdom |
| BERKMAN, Charles Stuart RESIGNED | Secretary | 01 Apr 2019 | 01 Nov 2022 | | | C/O Legalinx Limited, 3rd Floor, 207 Regent Street, London, W1B 3HH, United Kingdom |
| BOND, Jonathan Charles Howard RESIGNED | Secretary | 26 Jan 2001 | 30 Jun 2004 | | | Thames Court, Watlington Road, Oxford, Oxfordshire, OX4 6LY |
| HOOD, Alison Mary RESIGNED | Secretary | 30 Sep 2009 | 30 Nov 2010 | | | Oakdene Court, 613 Reading Road, Winnersh, Berkshire, RG41 5UA |
| ILETT, John Edward RESIGNED | Secretary | 01 Mar 1999 | 18 Aug 2000 | | | 13 West View, Tree Lane, Oxford, Oxfordshire, OX4 4EX |
| KISSANE, Kevin Patrick RESIGNED | Secretary | 30 Nov 2010 | 01 Nov 2017 | | | 100, Berkshire Place, Wharfedale Road Winnersh, Wokingham, Berkshire, RG41 5RD, United Kingdom |
| MACKNEY, David RESIGNED | Secretary | 01 Nov 2017 | 25 Jan 2018 | | | 100, Berkshire Place, Wharfedale Road Winnersh, Wokingham, Berkshire, RG41 5RD |
| SLATER, John Andrew Duncan RESIGNED | Secretary | 29 Oct 2004 | 30 Sep 2009 | | | Oakdene Court, 613 Reading Road, Winnersh, Berkshire, RG41 5UA |
| WALLCRAFT, Susan Jean RESIGNED | Secretary | 25 Jan 2018 | 31 Mar 2019 | | | Granta Park, Great Abington, Cambridge, CB21 6GB, England |
| WEIR, Anthony John RESIGNED | Secretary | | 01 Jun 2000 | | | Thames Court, Watlington Road, Oxford, Oxfordshire, OX4 6LY |
| WORRALL, Peter Brian RESIGNED | Secretary | 30 Jun 2004 | 29 Oct 2004 | | | Oakdene Court 613 Reading Road, Winnersh, Wokingham, RG41 5UA |
| DYE & DURHAM SECRETARIAL LIMITED RESIGNED | Secretary | 04 May 2021 | 02 Jun 2023 | | | Churchill House, Churchill Way, Cardiff, CF10 2HH, Wales |
| BAXTER, Allan, Dr RESIGNED | Director | 19 May 2004 | 21 Jan 2015 | United Kingdom | February 1950 | 100, Berkshire Place, Wharfedale Road Winnersh, Wokingham, Berkshire, RG41 5RD, United Kingdom |
| BERKMAN, Charles Stuart RESIGNED | Director | 12 Oct 2018 | 01 Nov 2022 | United States | November 1968 | C/O Legalinx Limited, 3rd Floor, 207 Regent Street, London, W1B 3HH, United Kingdom |
| CAMPION, Giles Victor, Dr RESIGNED | Director | 12 Apr 1999 | 27 Sep 2001 | England | December 1954 | 112 Banbury Road, Oxford, Oxfordshire, OX2 6JU |
| CLARK, Ian RESIGNED | Director | 01 Jan 2007 | 31 Dec 2009 | | August 1960 | 150 Tobin Clark Drive, Hillsborough, 94010 California, Usa |
| DE RUITER, Henny RESIGNED | Director | 14 Sep 1995 | 23 Sep 1998 | | March 1934 | Prins Frederiklaan 16, 2243 Hw Wassenaar, The Netherlands, FOREIGN |
| DOVEY, Brian Hugh RESIGNED | Director | | 23 Mar 1993 | United States | November 1941 | 704 Plymouth Road, Gwynned Valley, Pa 19347, FOREIGN, Usa |
| DRUMMOND, Alan Hastings RESIGNED | Director | 02 Jun 1997 | 17 Mar 2000 | | March 1950 | 14 High Street, Standlake, Witney, Oxfordshire, OX29 7RY |
| EDWARDS, Timothy Peter Warren RESIGNED | Director | 01 Apr 1999 | 10 Sep 2003 | | October 1956 | Thames Court, Watlington Road, Oxford, Oxfordshire, OX4 6LY |
| FALLEN, Malcolm James RESIGNED | Director | 08 Sep 1997 | 31 Mar 1999 | | October 1959 | Brook House, Transport Way, Oxford, Oxfordshire |
| FELLNER, Peter John, Dr RESIGNED | Director | 04 Dec 2002 | 12 Oct 2018 | United Kingdom | December 1943 | 100, Berkshire Place, Wharfedale Road Winnersh, Wokingham, Berkshire, RG41 5RD, United Kingdom |
| FERGUSON, Carol Cecilia RESIGNED | Director | 01 Sep 2003 | 12 Oct 2018 | United Kingdom | November 1946 | 100, Berkshire Place, Wharfedale Road Winnersh, Wokingham, Berkshire, RG41 5RD, United Kingdom |
| FOEHR, Matthew William RESIGNED | Director | 12 Oct 2018 | 01 Nov 2022 | United States | August 1972 | C/O Legalinx Limited, 3rd Floor, 207 Regent Street, London, W1B 3HH, United Kingdom |
| GARLAND, Ian RESIGNED | Director | 29 Dec 2008 | 12 Oct 2018 | England | July 1965 | 100, Berkshire Place, Wharfedale Road Winnersh, Wokingham, Berkshire, RG41 5RD |
| GILHAM, Ian David, Dr RESIGNED | Director | 01 Jul 2015 | 16 Aug 2018 | England | March 1960 | 100 Berkshire Place, Wharfedale Road, Winnersh, Berkshire, RG41 5RD, United Kingdom |
| GOLDSTEIN, Elliot Paul, Dr RESIGNED | Director | 24 Sep 1998 | 04 Nov 2002 | | February 1951 | Isis House, Transport Way, Oxford, Oxfordshire, OX4 6LX |
| GORDON, John Laurie, Dr RESIGNED | Director | | 31 Jul 1996 | | July 1944 | Bishop Oak Jarnway, Boars Hill, Oxford, OX1 5JF |
| GRAY, Stephen Marius RESIGNED | Director | | 23 Sep 1999 | United Kingdom | August 1934 | 47 Maze Hill, Greenwich, London, SE10 8XQ |
| HAMPSON, Christopher RESIGNED | Director | 04 Aug 1998 | 31 Dec 2002 | United Kingdom | September 1931 | 77 Kensington Court, London, W8 5DT |
| HUTCHISON, John Blundell, Dr RESIGNED | Director | 01 Sep 2003 | 31 Aug 2007 | | September 1955 | Oakdene Court 613 Reading Road, Winnersh, Wokingham, Berkshire, RG41 5UA |
| IRWIN, Thomas Ronald RESIGNED | Director | 23 Mar 1993 | 30 Sep 1996 | United Kingdom | July 1935 | Beechcroft Camp Road, Gerrards Cross, Buckinghamshire, SL9 7PG |
| JACK, David, Sir RESIGNED | Director | | 30 Apr 1993 | | February 1924 | 6 The Slype, Gustard Wood, Wheathampstead, Hertfordshire, AL4 8RY |
| JENSEN, Peder Klosterskov, Doctor RESIGNED | Director | 26 Jan 1998 | 31 Jan 2001 | | July 1954 | 71 Bay Way, Sau Rafael, 94901 California, Usa |
| JOHN, David Glyndwr, Sir RESIGNED | Director | 23 Sep 1996 | 23 Sep 1999 | United Kingdom | July 1938 | 12 Grosvenor Crescent Mews, London, SW1X 7EU |
| KENNEDY, George Macdonald RESIGNED | Director | 01 Sep 2003 | 15 Jun 2011 | | August 1940 | C/O Vernalis Plc Oakdene Court, 613 Reading Road, Winnersh, Berkshire, RG41 5UA |
| KENT, Ian Fletcher RESIGNED | Director | 23 Apr 2003 | 24 Jun 2004 | | March 1944 | 9 Latham Road, Cambridge, Cambridgeshire, CB2 2EG |
| KIRBY, Pamela Josephine, Dr RESIGNED | Director | 23 Sep 1996 | 30 Sep 1998 | | September 1953 | Avondale Blenheim View, Park Lane Long Hanborough, Witney, Oxfordshire, OX8 8RD |
| KORENBERG, Matthew Edward RESIGNED | Director | 12 Oct 2018 | 15 Oct 2024 | United States | March 1975 | Suite 1, 7th Floor, 50 Broadway, London, SW1H 0DB, United Kingdom |
| LEATHERS, David Frederick James RESIGNED | Director | | 31 Dec 1995 | | December 1942 | Eastcote House, Church Lane, Dogmersfield, Hampshire, RG27 8TB |
| LEWIS, Peter John, Dr RESIGNED | Director | 09 Jul 1992 | 30 Jun 1997 | | April 1944 | West View Cottage, Fernham Road, Uffington, Oxon, SN7 7RD |
| MACKNEY, David RESIGNED | Director | 02 Feb 2009 | 12 Oct 2018 | United Kingdom | February 1968 | 100, Berkshire Place, Wharfedale Road Winnersh, Wokingham, Berkshire, RG41 5RD, United Kingdom |
| MCCULLAGH, Keith Graham, Dr RESIGNED | Director | | 23 Sep 1998 | United Kingdom | November 1943 | Cuddington Mill, Cuddington, Aylesbury, Buckinghamshire, HP18 0BP |
| MERRIFIELD, Keith James RESIGNED | Director | 01 Dec 1995 | 24 May 2006 | | May 1942 | 16 Archery Close, Winchester, Hampshire, SO23 8GG |
| NICHOLSON, Paul Anthony, Doctor RESIGNED | Director | 14 Jan 2000 | 31 Dec 2002 | | March 1937 | Lorton Park, High Lorton, Cockermouth, Cumbria, CA13 9UG |
| NOBLE, James Julian RESIGNED | Director | | 12 Feb 1997 | | March 1959 | Fernbank, 13 Elsfield Road Old Marston, Oxford, Oxon, OX3 0PR |
| RAISMAN, John Michael RESIGNED | Director | 23 Mar 1993 | 30 Sep 1998 | | February 1929 | Netheravon House, Netheravon Road South, London, W4 2PY |
| READ, Peter Robert, Dr RESIGNED | Director | 01 Sep 2003 | 31 Dec 2009 | | January 1939 | Oakdene Court 613 Reading Road, Winnersh, Wokingham, Berkshire, RG41 5UA |
| REECE, Charles Hugh, Sir RESIGNED | Director | | 31 Dec 1995 | | January 1927 | Heath Ridge, Graffham, Petworth, West Sussex, GU28 0PT |
| RICHARDS, Brian Mansel, Sir RESIGNED | Director | | 30 Jun 1995 | | September 1932 | Panthers Hill Church End, Bletchingdon, Kidlington, Oxfordshire, OX5 3DJ |
| ROGERSON, Philip Graham RESIGNED | Director | 17 Nov 1999 | 23 Apr 2003 | | January 1945 | 56 Vogans Mill, Mill Street, London, SE1 2BZ |
| SCHOENBERG, Lisa Amster RESIGNED | Director | 01 Sep 2015 | 12 Oct 2018 | United States | September 1966 | 100 Berkshire Place, Wharfedale Road, Winnersh, Berkshire, RG41 5RD, United Kingdom |
| SHEAIL, Nigel RESIGNED | Director | 03 Aug 2011 | 12 Oct 2018 | Switzerland | June 1965 | 100, Berkshire Place, Wharfedale Road Winnersh, Wokingham, Berkshire, RG41 5RD, United Kingdom |
| SLATER, John Andrew Duncan RESIGNED | Director | 18 Nov 2004 | 30 Sep 2009 | United Kingdom | January 1953 | Oakdene Court, 613 Reading Road, Winnersh, Berkshire, RG41 5UA |
| STURGE, Simon RESIGNED | Director | 23 Apr 2003 | 29 Feb 2008 | | March 1959 | Oakdene Court, 613 Reading Road, Winnersh, Berkshire, RG41 5UA |
| WEIR, Anthony John RESIGNED | Director | 01 Apr 1999 | 14 Nov 2008 | | June 1960 | Oakdene Court, 613 Reading Road, Winnersh, Berkshire, RG41 5UA |
| WILKERSON, Louis John RESIGNED | Director | 23 Mar 1993 | 20 Jun 2000 | | June 1943 | Long Hill Road, New Vernon, New Jersey, Usa |
| WILLIAMS, Eugene Warren RESIGNED | Director | 26 Jan 2001 | 24 Jun 2004 | | August 1959 | 26 Clifton Street, Belmont, Ma 02478, Usa |
| WORRALL, Peter Brian RESIGNED | Director | 01 Sep 2003 | 29 Oct 2004 | | August 1954 | Oakdene Court 613 Reading Road, Winnersh, Wokingham, RG41 5UA |