| VISTRA COMPANY SECRETARIES LIMITED ACTIVE | Secretary | 28 Feb 2011 | | | | First Floor, Templeback, 10 Temple Back, Bristol, BS1 6FL |
| BRUNDISH, Kevin David ACTIVE | Director | 10 Jun 2014 | | United Kingdom | October 1970 | Denchi House, Thurso Enterprise Park, Thurso, Caithness, KW14 7XW, Scotland |
| CAVANAGH, James RESIGNED | Secretary | 30 Sep 2005 | 07 Jun 2006 | | | 40 St Hilda's Close, Didcot, Oxfordshire, OX11 9UX |
| COX, Jane Elizabeth Mary RESIGNED | Secretary | 11 Oct 1999 | 25 Jul 2000 | | | 35 Limetrees, Chilton, Didcot, Oxfordshire, OX11 0HY |
| COX, Jane Elizabeth Mary RESIGNED | Secretary | 16 Jun 1998 | 28 Feb 1999 | | | 35 Limetrees, Chilton, Didcot, Oxfordshire, OX11 0HY |
| MURRAY, Catherine Goldie RESIGNED | Secretary | 17 Aug 2000 | 30 Sep 2005 | | | 21 Castle Street, Thurso, Caithness, KW14 7JD |
| RUSSELL, Keith John RESIGNED | Secretary | 21 May 1998 | 16 Jun 1998 | | | Elsfield Crafts End, Chilton, Didcot, Oxfordshire, OX11 0SA |
| SIMMONDS, Louise Clare RESIGNED | Secretary | 28 Feb 1999 | 08 Oct 1999 | | | 10 Ormond Road, Wantage, Oxfordshire, OX12 8EG |
| HACKWOOD SECRETARIES LIMITED RESIGNED | Nominee Secretary | 11 Dec 1997 | 21 May 1998 | | | One Silk Street, London, EC2Y 8HQ |
| JAMESTOWN INVESTMENTS LIMITED RESIGNED | Secretary | 02 Oct 2006 | 28 Feb 2011 | | | 4 Felstead Gardens, Ferry Street, London, E14 3BS |
| BETTS, Philip John RESIGNED | Director | 20 Dec 2013 | 04 Feb 2015 | United Kingdom | March 1963 | Level 33 Tower 42, 25 Old Broad Street, London, EC2N 1HQ |
| BOYES, Stephen RESIGNED | Director | 16 Jun 1998 | 01 Feb 2000 | England | March 1953 | Crockford House, Snow Hill, Crawley, West Sussex, RH10 3EE |
| BROWN, Christopher Paul RESIGNED | Director | 11 Aug 2004 | 09 Jan 2006 | United Kingdom | July 1955 | Ranelagh, 14 Linersh Wood Close, Bramley, Surrey, GU5 0EG |
| CAVANAGH, James RESIGNED | Director | 30 Sep 2005 | 07 Jun 2006 | England | January 1961 | 40 St Hilda's Close, Didcot, Oxfordshire, OX11 9UX |
| COWLEY, John Michael RESIGNED | Director | 14 Aug 2006 | 24 Aug 2007 | England | June 1945 | Garden Lodge, Upton St Leonards, Gloucestershire, GL4 8EB |
| FINN, Andre Thomas RESIGNED | Director | 17 Oct 2014 | 05 Oct 2016 | England | February 1968 | 52 Cornhill, Cornhill, London, EC3V 3PD, England |
| HAYASHI, Kenzaburo RESIGNED | Director | 16 Jun 1998 | 29 Jun 2000 | | December 1939 | 8-11 Izumigaoka Nagaoka, Kyo-Shi, Kyoto-Fu, Japan |
| JEFFERY, Anthony Michael RESIGNED | Director | 01 Feb 2000 | 28 Feb 2011 | | October 1945 | Suidhe, Canisbay, Wick, Caithness, KW1 4YH |
| KIMURA, Etsuji RESIGNED | Director | 16 Jun 1998 | 29 Jun 1999 | | September 1945 | 1-25-7 Yutaka-Chou, Kasokabe-City 344-0066, Saitama-Pref Japan |
| KOMADA, Norikazu RESIGNED | Director | 10 Jul 2001 | 15 Mar 2006 | | March 1952 | 4-13-10 Aoge, Kuki Shi, Saitama Ken 346 0011, Japan |
| LINDSAY, David RESIGNED | Director | 04 Jul 2005 | 07 Jun 2006 | | May 1956 | 92 Sandringham Road, Watford, Hertfordshire, WD24 7BE |
| LOUGHBOROUGH, David RESIGNED | Director | 03 Jan 2001 | 28 Jun 2004 | | October 1961 | Windy Nook Keoltag Drive, Reay, Caithness, KW14 7SD |
| MAINE, Michael Geoffrey RESIGNED | Director | 28 Feb 2011 | 20 Dec 2013 | Uk | June 1956 | Hillcrest, Earlswood, Nr Shirenewton, Chepstow, Monmouthshire, NP16 6AN, United Kingdom |
| MCCREE, Andrew Charles Gambon RESIGNED | Director | 16 Jun 1998 | 04 Jul 2005 | | August 1957 | Rose Farm, Manningford Abbots, Pewsey, Wiltshire, SN9 6JA |
| MIZUTANI, Minoru RESIGNED | Director | 29 Jun 2000 | 10 Jun 2003 | | December 1942 | 2-2-2-303 Nidnoha,A, Otsu City, Shiga Prefecture, 520 0801, Japan |
| MOCHIZUKI, Akira RESIGNED | Director | 29 Jun 2000 | 29 Jun 2004 | | March 1947 | 1-8-25 Nonmachi-Higashi, Yono-Shi, Saitama-Ken 338-0003, Japan |
| MURRAY, Catherine Goldie RESIGNED | Director | 14 Aug 2006 | 28 Feb 2011 | | October 1975 | Plocan, Calder, Halkirk, Caithness, KW12 6XQ, United Kingdom |
| MURRAY, Catherine Goldie RESIGNED | Director | 11 May 2005 | 30 Sep 2005 | | October 1975 | 21 Castle Street, Thurso, Caithness, KW14 7JD |
| NEAT, Robin John, Dr RESIGNED | Director | 16 Jun 1998 | 02 Jan 2001 | | September 1960 | 15 Willow Lane, Milton, Abingdon, Oxfordshire, OX14 4EG |
| ONO, Mikiya RESIGNED | Director | 16 Jun 1998 | 10 Jul 2001 | | September 1933 | 1-24-12 Matsugaoka, Tokorozawa-City 359-1132, Saitama-Pref, Japan |
| PARK, Adam Colton RESIGNED | Director | 31 Oct 2016 | 15 Jun 2022 | England | March 1969 | Denchi House, Thurso Enterprise Park, Thurso, KW14 7XW, Scotland |
| PROCTOR, Raymond RESIGNED | Director | 21 May 1998 | 18 May 2004 | United Kingdom | March 1945 | Meadow House, 25 Summer Lane, Wirksworth, Derbyshire, DE4 4EB |
| RUSSELL, Keith John RESIGNED | Director | 21 May 1998 | 16 Jun 1998 | | April 1955 | Elsfield Crafts End, Chilton, Didcot, Oxfordshire, OX11 0SA |
| RYAN, Graham Charles RESIGNED | Director | 23 Nov 2007 | 30 Jun 2009 | | September 1955 | Sparrows, Brightstone Lane, Farringdon, Hampshire, GU34 3DG |
| SIMMS, Barry RESIGNED | Director | 18 May 2004 | 04 Apr 2005 | | April 1947 | 4 Addisons Way, Lilleshall, Newport, Shropshire, TF10 9HH |
| SONODA, Teruo RESIGNED | Director | 10 Jun 2003 | 15 Mar 2006 | | January 1955 | Miyatani 1-45, Hirono-Cho Uji-City, Kyoto Pref, FOREIGN, Japan |
| TILLET, Paul Brian RESIGNED | Director | 12 Dec 2015 | 16 Dec 2020 | England | February 1965 | Denchi House, Thurso Enterprise Park, Thurso, Caithness, KW14 7XW, Scotland |
| UEDA, Fumihiro RESIGNED | Director | 29 Jun 2004 | 15 Mar 2006 | | September 1947 | 2-1571-8 Owada Minuma-Ku, Saitama-Shi, Saitama-Ken 337-0053, Japan |
| WATSON, Peter RESIGNED | Director | 04 May 2000 | 07 Jun 2006 | England | January 1944 | 49 Suckling Green Lane, Wolverhampton, West Midlands, WV8 2BT |
| WRIGHT, Christopher John, Dr RESIGNED | Director | 16 Jun 1998 | 03 May 2000 | United Kingdom | December 1947 | The Malthouse, 22 Pettiwell, Garsington, Oxford, OX44 9DB, United Kingdom |
| YAMACHI, Masanori RESIGNED | Director | 16 Jun 1998 | 01 Feb 2006 | | February 1941 | 1-10-4 Kayogaoka, Nagaokakyo-Shi, Kyoto-Fu, 617 0852, Japan |
| YODA, Makoto RESIGNED | Director | 01 Feb 2006 | 15 Mar 2006 | | January 1950 | 19-13 Akibadai, Otsu-Shi, Shiga 520-0822, Japan |
| YOSHIZUMI, Motohiko RESIGNED | Director | 29 Jun 1999 | 29 Jun 2000 | | January 1944 | 3-151 Kotobuki, Ina Machi Kita Adachi Gun, Saitama Ken, Japan |
| ZUIDEMA, Richard William RESIGNED | Director | 28 Feb 2011 | 20 Dec 2013 | United States | September 1948 | 1932, Wickford Place, Wyomissing, PA 19610, Usa |
| HACKWOOD DIRECTORS LIMITED RESIGNED | Nominee Director | 11 Dec 1997 | 21 May 1998 | | | One Silk Street, London, EC2Y 8HQ |