| HARDY, Mark Glyn ACTIVE | Secretary | 29 Oct 2004 | | | | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| HARDY, Mark Glyn ACTIVE | Director | 25 Jul 1996 | | United Kingdom | June 1953 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| KHATRI, Yogesh ACTIVE | Director | 24 Jun 2013 | | United Kingdom | October 1965 | 216, Bath Road, Slough, Berkshire, SL1 4EN, England |
| VAN DER TOORN, Adriaan Cornelis ACTIVE | Director | 24 Jul 2010 | | Belgium | December 1971 | 208 Bath Road, Slough, Berkshire, SL1 3WE |
| HARDY, Mark Glyn RESIGNED | Secretary | | 25 Jul 1996 | | | 2 Heathwood Close, Heath Road, Leighton Buzzard, Bedfordshire, LU7 3DU |
| MURPHY, John RESIGNED | Secretary | 25 Jul 1996 | 31 Jan 2001 | | | Pharmagene Laboratories Ltd, 2 Orchard Road, Royston, Herts, SG8 5HD |
| SLATER, John Andrew Duncan RESIGNED | Secretary | 31 Jan 2001 | 29 Oct 2004 | | | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| ADAMS, John Quincy RESIGNED | Director | 02 Jan 1992 | 22 Sep 1995 | United States | November 1936 | 3409 Windsor Court, Colleyville, Texas, 76034, Usa |
| ALLEN, Peter Vance RESIGNED | Director | 26 Jan 2000 | 17 Dec 2004 | | March 1956 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| ANDO, Goran Albert Torstensson, Doctor RESIGNED | Director | 16 Apr 2003 | 29 Oct 2004 | | March 1949 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| BAINS, Harbinder Singh RESIGNED | Director | 17 Dec 2004 | 28 Feb 2006 | | June 1965 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| BAKER, John William RESIGNED | Director | 31 Oct 1995 | 26 Jan 2000 | | December 1937 | Thorley Cottage, Pyrford Road, Woking, Surrey, GU22 8UQ |
| BOGIE, William, Dr RESIGNED | Director | 31 Mar 1993 | 16 Mar 2000 | | August 1944 | 23 Andrews Way, Marlow Bottom, Buckinghamshire, SL7 3QJ |
| DALBY, Alan James RESIGNED | Director | 01 Jan 1997 | 26 Jan 2000 | | January 1937 | 20 West Cedar Street, Boston Massachusetts 02108, Usa |
| DE CANNART D'HAMALE, Michele RESIGNED | Director | 30 Dec 2004 | 29 Apr 2011 | Belgium | May 1951 | Rue Aux Laines, 21-100, Brussels, FOREIGN, Belgium |
| FELLNER, Peter John, Dr RESIGNED | Director | 26 Jan 2000 | 16 Apr 2003 | | December 1943 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| FERGUSON, John RESIGNED | Director | 01 Oct 1998 | 31 Oct 2000 | | December 1955 | 184 Amyand Park Road, Twickenham, Middlesex, TW1 3HY |
| GERARD, William Wilson RESIGNED | Director | | 31 Dec 1994 | | August 1933 | 4 Harmer Dell, Harmer Green Lane Digswell, Welwyn, Hertfordshire, AL6 0BE |
| GOODMAN, Alan Gilbert RESIGNED | Director | | 10 May 1991 | | January 1951 | 16 Cantelupe Road, Haslingfield, Cambridge, Cambridgeshire, CB3 7LU |
| GOWRIE-SMITH, Ian Roderick RESIGNED | Director | | 05 Sep 1994 | | June 1948 | 16 Chelsea Square, London, SW3 6LF |
| HARRIS, Ralph Stephen RESIGNED | Director | | 27 Apr 1995 | England | June 1942 | Old Tiles, Westwood Road, Windlesham, Surrey, GU20 6NB |
| JONES, Stephen Charles RESIGNED | Director | 28 Feb 2006 | 30 Jun 2013 | United Kingdom | August 1952 | 216 Bath Road, Slough, Berkshire, SL1 4EN |
| JULIEN, Michael Frederick RESIGNED | Director | | 23 Apr 1998 | | March 1938 | Bendochy Ellesmere Road, Weybridge, Surrey, KT13 0HQ |
| LEES, David John RESIGNED | Director | | 26 Apr 1994 | | September 1947 | Larchwood, Heathfield Avenue Sunninghill, Ascot, Berkshire, SL5 0AL |
| MILLARD, Dennis Henry RESIGNED | Director | 14 Mar 1994 | 29 Feb 1996 | United Kingdom | February 1949 | Kingscote, Binfield Road, Wokingham, Berkshire, RG40 5PP |
| READ, Peter Robert, Dr RESIGNED | Director | 01 Jan 1999 | 26 Jan 2000 | Uk | January 1939 | Marchfields, 6 Ashley Hill Place,, Cockpole Green, Wargrave, Berkshire, RG10 8NL |
| RIGBY, Bryan RESIGNED | Director | 28 Sep 1993 | 22 Apr 1999 | United Kingdom | January 1933 | Cluny 61 Penn Road, Beaconsfield, Buckinghamshire, HP9 2LW |
| ROELANDT, Erik RESIGNED | Director | 30 Dec 2004 | 24 Jul 2010 | Belgium | July 1964 | 208 Bath Road, Slough, Berkshire, SL1 3WE |
| SCHULZE, Gerald Hans RESIGNED | Director | 01 Feb 1996 | 30 Jun 1998 | | February 1948 | 32 Stony Brook Road, Westport, Connecticut, 06880, Usa |
| SINCLAIR, Kenneth Brian RESIGNED | Director | | 20 Sep 1996 | | March 1931 | Hedley High Drive, Woldingham, Surrey, CR3 7ED |
| TAYLOR, Bernard David RESIGNED | Director | | 25 Apr 1996 | | October 1935 | 33 Kensington Square, London, W8 5HH |
| WATTS, Garry RESIGNED | Director | 01 Feb 1996 | 30 Sep 2000 | | December 1956 | Walters Farmhouse, Robertsbridge, East Sussex, TN32 5BH |
| WILLIAMS, David Michael RESIGNED | Director | 01 Mar 1998 | 26 Jan 2000 | United Kingdom | January 1946 | 29 Fort Road, Guildford, Surrey, GU1 3TE |
| YOUNG, Michael, Dr RESIGNED | Director | 27 Apr 1995 | 08 Sep 2000 | | September 1939 | 654 Wallace Drive, Wayne, Pa 19087, Usa |