| BARKER, Colin Andrew ACTIVE | Secretary | 16 Apr 2018 | | | | 400, South Oak Way, Reading, RG2 6AD, England |
| BARKER, Colin Andrew ACTIVE | Director | 08 Jul 2018 | | England | August 1965 | 400, South Oak Way, Reading, RG2 6AD, England |
| MACVARISH, Michelle Marguerite ACTIVE | Director | 20 Oct 2025 | | England | February 1970 | 400, South Oak Way, Reading, Berkshire, RG2 6AD, England |
| CLAPHAM, Christopher Edward RESIGNED | Secretary | | 01 Jan 1995 | | | 5 Peveril Road, Greatworth, Banbury, Oxfordshire, OX17 2DN |
| HARGRAVES, Martyn Robert Arthur RESIGNED | Secretary | 01 Jan 1995 | 31 Dec 2006 | | | West Street House, West Street, Newbury, Berkshire, RG14 1JA |
| WILKINSON, Mark Alistair RESIGNED | Secretary | 31 Dec 2006 | 16 Apr 2018 | | | 400, South Oak Way, Reading, RG2 6AD, England |
| ADAMS, Keith Graham RESIGNED | Director | | 17 May 1995 | England | August 1944 | Briland Gorelands Lane, Chalfont St Giles, Buckinghamshire, HP8 4HQ |
| BARLOW, Neil Wallace RESIGNED | Director | 17 Sep 1997 | 31 Dec 1999 | | May 1941 | 31 Gibraltar Lane, Swavesey, Cambridge, Cambridgeshire, CB4 5RR |
| BOCKSTEGERS, Ute RESIGNED | Director | 09 Feb 2012 | 19 Jul 2018 | United Kingdom | October 1963 | 400, South Oak Way, Reading, RG2 6AD, England |
| BRAUND, Stephen Herbert RESIGNED | Director | 26 Apr 2004 | 23 May 2007 | | January 1957 | 230 Cambridge Science Park, Milton Road, Cambridge, CB4 0WB |
| CONVENT, Bernardus RESIGNED | Director | 15 Jun 1993 | 26 Sep 1994 | | June 1945 | 3/5 Rue Saint Fargeau, 75020 Paris, France, FOREIGN |
| DAWKINS, Martin Scott RESIGNED | Director | 23 May 2007 | 27 Feb 2017 | England | March 1960 | Bayer House, Strawberry Hill, Newbury, Berkshire, RG14 1JA |
| DRINKWATER, John Edward RESIGNED | Director | 31 Dec 2000 | 30 Sep 2002 | | August 1957 | 167 Marlborough Crescent, Montreal Park, Sevenoaks, Kent, TN13 2HW |
| FORGET, Pascal RESIGNED | Director | | 15 Jun 1994 | | October 1959 | 6 Holland Close, Stanmore, Middlesex, HA7 3AN |
| HALLS, Geoffrey Richard Henry RESIGNED | Director | 30 Sep 1996 | 31 Dec 2000 | | September 1952 | Sendelbacher Weg 41, Kellcheim, 65779, Germany |
| HARGRAVES, Martyn Robert Arthur RESIGNED | Director | 26 Apr 2004 | 15 Feb 2007 | | June 1951 | West Street House, West Street, Newbury, Berkshire, RG14 1JA |
| HARRIS, William Geoffrey, Dr RESIGNED | Director | | 30 Sep 1996 | | July 1949 | Lea Farm Slicketts Lane, Edlesborough, Dunstable, Bedfordshire, LU6 2JD |
| HOUSSET, Pascal, Dr RESIGNED | Director | | 03 Mar 1993 | | June 1949 | 12 Rue De Labbe De Lepee, Paris 75005, FOREIGN, France |
| LABBE, Jean-Francois RESIGNED | Director | | 06 Jun 1994 | | March 1950 | Flat 3 Sheridan Court, 55 Barkston Gardens, London, SW5 0ET |
| MCMANUS, Ian Daniel RESIGNED | Director | 12 Jun 1995 | 31 Dec 2000 | United Kingdom | August 1949 | Ash House, High Street Great Chesterford, Saffron Walden, Essex, CB10 1PL |
| MEHEUT, Bertrand RESIGNED | Director | 31 Dec 2000 | 03 Jun 2002 | | September 1951 | 92 Avenue Pasteur, Saint Didier Au Mont D'Or 69370, France |
| O'BRIEN, Michael Gerard RESIGNED | Director | 31 Jan 2001 | 30 Jan 2004 | | November 1961 | 1 Cambridge Road, Hauxton, Cambridge, CB2 5HU |
| ORME, Andrew RESIGNED | Director | 01 Jan 2007 | 22 Feb 2017 | United Kingdom | January 1963 | 230 Cambridge Science Park, Milton Road, Cambridge, Cambridgeshire, CB4 0WB |
| REES, David Hugh Thomas RESIGNED | Director | 08 Dec 1994 | 17 Sep 1997 | United Kingdom | July 1953 | The Coach House, London Road, Ascot, Berkshire, SL5 8DE |
| SARGENT, Peter RESIGNED | Director | 31 Dec 1999 | 31 Jan 2001 | | April 1946 | 1 Bibby Close, Corringham, Stanford Le Hope, Essex, SS17 7QB |
| SCHNEIDER, Joachim, Dr RESIGNED | Director | 03 Sep 2003 | 01 Jan 2007 | | March 1956 | 1 Cambridge Road, Hauxton, Cambridge, CB2 5HU |
| WAITE, Stephen Richard RESIGNED | Director | 15 Feb 2007 | 09 Feb 2012 | United Kingdom | December 1952 | Bayer House, Strawberry Hill, Newbury, Berkshire, RG14 1JA |
| WILKINSON, Mark Alistair RESIGNED | Director | 27 Feb 2017 | 20 Oct 2025 | England | February 1966 | 400, South Oak Way, Reading, Berkshire, RG2 6AD, England |
| WULFF, Jochen RESIGNED | Director | 24 Feb 2003 | 26 Apr 2004 | | August 1939 | 1 Cambridge Road, Hauxton, Cambridge, CB2 5HU |