| JEMMOTT-JAMES, Vanessa ACTIVE | Secretary | 28 May 2026 | | | | C/O Workman Llp, 7th Floor, 3 Newbridge Sq., Swindon, SN1 1BY, United Kingdom |
| DAVIS, Robert ACTIVE | Director | 30 Nov 2019 | | England | January 1969 | C/O Workman Llp, Minton Place, Station Road, Swindon, SN1 1DA, United Kingdom |
| MAHER, Karen Louise ACTIVE | Director | 20 Dec 2021 | | United Kingdom | May 1980 | C/O Advanced Research Clusters, Harwell Quad Two, Rutherford Avenue, Harwell, OX11 0DF, United Kingdom |
| SMITH, Mark Geoffrey ACTIVE | Director | 30 Nov 2019 | | England | December 1971 | C/O Workman Llp, 7th Floor, 3 Newbridge Sq., Swindon, SN1 1BY, United Kingdom |
| STRETTON, James Peter ACTIVE | Director | 20 Dec 2021 | | United Kingdom | September 1981 | C/O Advanced Research Clusters, Harwell Quad Two, Rutherford Avenue, Harwell, OX11 0DF, United Kingdom |
| BIRDWOOD, Gordon Thomas RESIGNED | Secretary | 01 Jul 2013 | 15 Jan 2017 | | | Alliance House, 12 Caxton Street, London, SW1H 0QS, England |
| DUFFIELD, David Mark Johnston RESIGNED | Secretary | 25 Jun 1999 | 23 Jul 2001 | | | 58 West Chiltern, Woodcote, Reading, Berkshire, RG8 0SG |
| FERGUSON, Iain Donald RESIGNED | Secretary | 07 Jun 1994 | 25 Sep 1996 | | | 2 Chalet Close, Shootersway Lane, Berkhamsted, Hertfordshire, HP4 3NR |
| LYNE, Sarah Jane RESIGNED | Secretary | 25 Sep 1996 | 25 Jun 1999 | | | 11 Abelia Close, West End, Woking, Surrey, GU24 9PG |
| READ, Jonathan David RESIGNED | Secretary | 23 Jul 2001 | 25 Jun 2007 | | | 179 Tanworth Lane, Shirley, Solihull, West Midlands, B90 4BZ |
| WELLMAN, Alison RESIGNED | Secretary | 15 Jan 2015 | 28 May 2026 | | | C/O Workman Llp, 7th Floor, 3 Newbridge Sq., Swindon, SN1 1BY, United Kingdom |
| ANCOSEC LIMITED RESIGNED | Secretary | 25 Jun 2007 | 01 Jul 2013 | | | Arlington House, Arlington Business Park Theale, Reading, Berkshire, RG7 4SA |
| ALLEN, Godfrey Alwin RESIGNED | Director | 07 Jun 1994 | 25 Jun 1996 | | April 1936 | 45 Burnt Oak, Cookham, Berkshire, SL6 9RN |
| AUSTEN, Jonathan Martin RESIGNED | Director | 30 Sep 2006 | 28 May 2008 | United Kingdom | June 1956 | Lygon Croft, Sandy Way, Cobham, Surrey, KT11 2EY |
| BATES, Julian Francis RESIGNED | Director | 24 Jul 2013 | 15 Jan 2015 | United Kingdom | July 1963 | Alliance House, 12 Caxton Street, London, SW1H 0QS, England |
| CANN, Jane Denise RESIGNED | Director | 07 Jun 1994 | 14 Sep 1998 | | July 1959 | 87 Surbiton Court, St Andrews Square, Surbiton, Surrey, KT6 4EE |
| CHAPMAN, Piers Christopher RESIGNED | Director | 01 Jul 2013 | 30 Nov 2019 | United Kingdom | May 1971 | Alliance House, 12 Caxton Street, London, SW1H 0QS, England |
| CHATER, Beth Salena RESIGNED | Director | 14 Sep 1998 | 31 Oct 2008 | United Kingdom | May 1961 | Langham Lodge, Bucklebury Alley, Newbury, Berkshire, RG18 9NH |
| CORNELL, James Martin RESIGNED | Director | 31 Dec 2009 | 01 Jul 2013 | England | January 1974 | Arlington House, Arlington House, Arlington Business Park, Theale, Reading, Berkshire, RG7 4SA, England |
| DAVIS, Robert RESIGNED | Director | 28 Feb 2019 | 30 Nov 2019 | England | January 1969 | C/O Workman Llp, Minton Place, Station Road, Swindon, SN1 1DA, United Kingdom |
| DEIGMAN, Patrick RESIGNED | Director | 07 Jun 1994 | 30 Sep 2006 | United Kingdom | February 1952 | Frith Hill House, Frith Hill, Great Missenden, Buckinghamshire, HP16 0QR |
| DUFFIELD, David Mark Johnston RESIGNED | Director | 14 Sep 1998 | 14 Sep 2007 | England | March 1949 | 58 West Chiltern, Woodcote, Reading, Berkshire, RG8 0SG |
| EVANS, Howard RESIGNED | Director | 29 Jul 2014 | 30 Nov 2019 | England | July 1966 | Alliance House, 12 Caxton Street, London, SW1H 0QS, United Kingdom |
| FLYNN, James Joseph RESIGNED | Director | 15 Jan 2015 | 28 Feb 2019 | United Kingdom | May 1957 | 80, Cheapside, London, EC2V 6DZ, United Kingdom |
| JOHNSTON, Andrew James RESIGNED | Director | 30 Jun 2008 | 01 Jul 2013 | United Kingdom | October 1958 | Langford Grange, Langford, Nr Lechlade, Gloucestershire, GL7 3LF |
| JONES, Nicholas Andrew De Burgh RESIGNED | Director | 15 Jan 2015 | 19 May 2016 | United Kingdom | January 1981 | 80, Cheapside, London, England, EC2V 6EE, England |
| MOHANLAL, Satish RESIGNED | Director | 31 Oct 2008 | 30 Sep 2009 | | April 1964 | 21 Mostyn Gardens, London, NW10 5QU |
| MURRAY, Nicholas Stuart Granville RESIGNED | Director | 07 Jun 1994 | 14 Sep 1998 | United Kingdom | June 1962 | Oak House, 51 Oxshott Way, Cobham, Surrey, KT11 2RU |
| NEILSON, Emily Jane, Miss. RESIGNED | Director | 17 Jun 2010 | 19 Feb 2015 | England | July 1975 | Arlington House, Arlington Business Park, Theale, Reading , RG7 4SA |
| NEWTON, Simon John RESIGNED | Director | 01 Jul 2013 | 30 Nov 2019 | United Kingdom | May 1958 | Alliance House, 12 Caxton Street, London, SW1H 0QS, England |
| O'SULLIVAN, Michael James RESIGNED | Director | 30 Jun 2008 | 31 Dec 2009 | | October 1966 | Greenlawns, 21 Broad Highway, Cobham, Surrey, KT11 2RR |
| POPE, Nigel Howard RESIGNED | Director | 30 Jun 2008 | 31 Dec 2009 | England | July 1964 | 17, Hawthorne Road, Bromley, Kent, BR1 2HN |
| POTTER, Richard James RESIGNED | Director | 31 Dec 2009 | 27 Dec 2021 | United Kingdom | January 1966 | Minton Place, Station Road, Swindon, SN1 1DA, United Kingdom |
| PULSFORD, Jeffrey Mark RESIGNED | Director | 14 Sep 1998 | 30 Jun 2008 | United Kingdom | August 1959 | Denesfield, 16 Lytton Park, Cobham, Surrey, KT11 2HB |
| RAVEN, James William Matthew, Mr RESIGNED | Director | 29 Aug 2017 | 09 Sep 2021 | United Kingdom | June 1972 | Minton Place, Station Road, Swindon, SN1 1DA, United Kingdom |
| REED, Robert Paul RESIGNED | Director | 26 Feb 2015 | 29 Aug 2017 | United Kingdom | September 1968 | Nelson House, Central Boulevard, Blythe Valley Park, Solihull, West Midlands, B90 8BG, United Kingdom |
| REED, Robert Paul RESIGNED | Director | 23 May 2011 | 19 Feb 2015 | United Kingdom | September 1968 | Nelson House, Central Boulevard, Blythe Valley Park, Solihull, West Midlands, B90 8BG, England |
| SMITH, Mark Geoffrey RESIGNED | Director | 19 May 2016 | 30 Nov 2019 | England | December 1971 | Minton Place, Station Road, Swindon, SN1 1DA |
| TIBBETTS, Michael Andrew RESIGNED | Director | 31 Dec 2009 | 17 Jun 2010 | England | October 1965 | Arlington House, Arlington House, Arlington Business Park, Theale, Reading, Berkshire, RG7 4SA, England |
| WORKMAN, David Russell RESIGNED | Director | 24 Jul 2013 | 15 Jan 2015 | England | July 1963 | Alliance House, 12 Caxton Street, London, SW1H 0QS, England |