| COLLETT, James David ACTIVE | Director | 01 Sep 2023 | | England | October 1975 | Linthwaite Labs, Manchester Road, Linthwaite, Huddersfield, HD7 5QH, England |
| SHAW, Craig Richard ACTIVE | Director | 03 Nov 2025 | | England | January 1977 | Linthwaite Labs, Manchester Road, Linthwaite, Huddersfield, HD7 5QH, England |
| ADAMS, Geoffrey Martin RESIGNED | Secretary | 01 May 2016 | 06 Apr 2018 | | | Linthwaite, Manchester Road, Linthwaite, Huddersfield, HD7 5QH |
| ALPIN, Janet RESIGNED | Secretary | 01 Jun 2015 | 01 May 2016 | | | Linthwaite, Manchester Road, Linthwaite, Huddersfield, HD7 5QH, England |
| BLYTHE, Edwin Charles RESIGNED | Secretary | 06 Apr 2018 | 31 Jan 2023 | | | Linthwaite Labs, Manchester Road, Linthwaite, Huddersfield, HD7 5QH, England |
| BYRNE, Peter Kevin RESIGNED | Secretary | 17 Sep 1996 | 21 May 1999 | | | 44 Winston Way, Thatcham, Newbury, Berkshire, RG19 3TY |
| FEVERMAN, Paul RESIGNED | Secretary | 21 May 1999 | 08 Aug 2000 | | | 77 Park Avenue, New York, New York 10016, Usa |
| FUNSTEN, Robert C RESIGNED | Secretary | 07 Dec 2000 | 10 May 2002 | | | 1942 Port Chelsea Place, Newport Beach, California, Ca 92660, Usa |
| GORE-STRACHAN, Evelyn RESIGNED | Secretary | 30 Jun 2014 | 01 Jun 2015 | | | Linthwaite, Manchester Road, Linthwaite, Huddersfield, HD7 5QH, England |
| HANLON, James Anthony RESIGNED | Secretary | 05 Apr 2006 | 13 Dec 2006 | | | Carrick Lodge Mountain Road, Clonmel, Co Tipperary, IRISH, Ireland |
| HEYWOOD, Kathryn Maria RESIGNED | Secretary | 31 Jan 2023 | 31 Jan 2023 | | | Linthwaite Labs, Manchester Road, Linthwaite, Huddersfield, HD7 5QH, England |
| HOLLAND, Richard Andrew Bruce RESIGNED | Secretary | 22 Jun 2004 | 04 Apr 2006 | | | 6 Parliament Close, Prestwood, Great Missenden, Buckinghamshire, HP16 9DT |
| INGHAM, Bruce RESIGNED | Secretary | | 19 May 1993 | | | 12 Meadowford, Newport, Essex, CB11 3QL |
| LOACH, Simon Charles, Doctor RESIGNED | Secretary | 19 May 1993 | 01 Aug 1995 | | | 37b Cannon Street, Little Downham, Ely, Cambridgeshire, CB6 2SS |
| NEWSON, Martin David RESIGNED | Secretary | 15 Mar 1996 | 17 Sep 1996 | | | 30 Abberbury Road, Iffley, Oxford, Oxfordshire, OX4 4ES |
| SALMOND, Hamish George RESIGNED | Secretary | 15 Oct 1999 | 04 Jun 2004 | | | 3 Walton Grange, Bath Road, Swindon, Wiltshire, SN1 4AH |
| WRIGHT, Philip John RESIGNED | Secretary | 13 Dec 2006 | 30 Jun 2014 | | | Park View House, 65 London Road, Newbury, Berkshire, RG14 1JN |
| ADAMS, Geoffrey Martin RESIGNED | Director | 01 Jun 2015 | 06 Apr 2018 | England | September 1960 | Linthwaite, Manchester Road, Linthwaite, Huddersfield, HD7 5QH, England |
| ASHRAFI, Dariush RESIGNED | Director | 15 Oct 1999 | 08 Aug 2000 | | February 1947 | 2 Tall Oaks Court, Menfham, Morris, New Jersey, 07945, Usa |
| BALLARD, Peter Gavin RESIGNED | Director | 22 Jun 2004 | 15 Oct 2013 | United Kingdom | October 1967 | 65, London Road, Newbury, Berkshire, RG14 1JN |
| BEHRENDT, Klaus Friedrich Wilhelm RESIGNED | Director | 15 Mar 1996 | 21 May 1999 | | October 1941 | Heiligenstock 48, Bergisch Gladbach 51465, Germany, FOREIGN |
| BLYTHE, Edwin Charles RESIGNED | Director | 01 Oct 2022 | 31 Jan 2023 | England | December 1968 | Linthwaite Labs, Manchester Road, Linthwaite, Huddersfield, HD7 5QH, England |
| BRIERLEY, Charles Ashley RESIGNED | Director | 31 Dec 2018 | 02 Dec 2019 | England | January 1963 | Linthwaite, Manchester Road, Linthwaite, Huddersfield, HD7 5QH |
| CHAO, Allen Yuten RESIGNED | Director | 07 Dec 2000 | 10 Mar 2003 | | September 1945 | 115 S. Montgomery Way, Anaheim, California 92807, Usa |
| DARROCH, Colin RESIGNED | Director | 15 Oct 1999 | 16 Mar 2001 | | November 1953 | Turnstones, 6 Ash Close, Swindon, Wiltshire, SN5 5DF |
| DORLING, Alan Robert RESIGNED | Director | 12 Mar 2001 | 13 Dec 2005 | | February 1959 | 4 Brownlow Drive, Bracknell, Berkshire, RG42 2LL |
| GEORGE, Dieno RESIGNED | Director | 27 Oct 2017 | 31 Dec 2018 | England | July 1956 | Linthwaite, Manchester Road, Linthwaite, Huddersfield, HD7 5QH |
| GIESELER, Hans Peter, Dr RESIGNED | Director | 04 Mar 2003 | 13 Dec 2005 | | October 1938 | Taunus Str 7, Mainz, D-55118, Germany |
| GUY, Geoffrey William, Dr RESIGNED | Director | | 29 Feb 1996 | | September 1954 | South House, Piddletrenthide, Dorchester, Dorset, DT2 7QP |
| HALON, James Anthony RESIGNED | Director | 04 Mar 2003 | 17 May 2010 | | June 1956 | Park View House, 65 London Road, Newbury, Berkshire, RG14 1JN |
| HARPER, David William RESIGNED | Director | | 31 Jan 1992 | | March 1954 | Landseer House Queens Lane, Chedburgh, Bury St Edmunds, Suffolk, IP29 4UX |
| HEYWOOD, Kathryn Maria RESIGNED | Director | 31 Jan 2023 | 01 Sep 2023 | England | June 1974 | Linthwaite Labs, Manchester Road, Linthwaite, Huddersfield, HD7 5QH, England |
| HOLLAND, Richard Andrew Bruce RESIGNED | Director | 03 Nov 2004 | 04 Apr 2006 | | March 1966 | 6 Parliament Close, Prestwood, Great Missenden, Buckinghamshire, HP16 9DT |
| INGHAM, Bruce RESIGNED | Director | 23 Jun 1993 | 01 Aug 1995 | | February 1958 | 12 Meadowford, Newport, Essex, CB11 3QL |
| INGHAM, Bruce RESIGNED | Director | 24 Jun 1988 | 01 Aug 1995 | | February 1958 | 12 Meadowford, Newport, Essex, CB11 3QL |
| KLEUTGHEN, Paul Pieter Gustaaf RESIGNED | Director | 15 Mar 1996 | 15 Oct 1999 | | June 1952 | 33 Coventry Road, Mendham Nj 07945, Usa, FOREIGN |
| NIEMANN, Peter, Dipl Ing RESIGNED | Director | 04 Mar 2003 | 21 May 2005 | | September 1949 | Schwalbacher Str 15, Waldems 65529, Germany |
| O' RIORDAN, Rory RESIGNED | Director | 13 Dec 2005 | 17 May 2010 | | January 1961 | Park View House, 65 London Road, Newbury, Berkshire, RG14 1JN, Ireland |
| ORIORDAN, Rory Walter RESIGNED | Director | 04 Mar 2003 | 21 Apr 2005 | | January 1961 | 36 Killeen Avenue, Malahide, County Dublin, IRISH, Ireland |
| SCARLETT-SMITH, Roger Lidderdale RESIGNED | Director | 02 Dec 2019 | 01 Oct 2022 | United Kingdom | November 1959 | Linthwaite, Manchester Road, Linthwaite, Huddersfield, HD7 5QH |
| SLEGERS, Luc Maurice Godelieva RESIGNED | Director | 13 Dec 2005 | 31 Oct 2017 | Belgium | June 1953 | Linthwaite, Manchester Road, Linthwaite, Huddersfield, HD7 5QH, England |
| SPERBER, Martin RESIGNED | Director | 01 Aug 1995 | 08 Aug 2000 | | August 1931 | 6 Casper Court, Florham Park New Jersey Nj 07932, Usa, FOREIGN |
| STEPHENSON, Nigel David RESIGNED | Director | 01 Aug 2023 | 31 Jul 2025 | Switzerland | September 1979 | Linthwaite Labs, Manchester Road, Linthwaite, Huddersfield, HD7 5QH, England |
| SYDOW, Volker RESIGNED | Director | 17 Jun 2025 | 03 Nov 2025 | England | February 1968 | Linthwaite Labs, Manchester Road, Linthwaite, Huddersfield, HD7 5QH, England |
| TOBIN, Christopher Michael RESIGNED | Director | 15 Mar 1996 | 21 May 1999 | United Kingdom | January 1953 | 27 Buckingham Road, Newbury, Berkshire, RG14 6DH |
| WATERS, Gary RESIGNED | Director | 15 Oct 1999 | 31 Mar 2001 | | November 1955 | 757 West Shore Drive, Kinnelon, New Jersy, 07405, Usa |
| WRIGHT, Philip John RESIGNED | Director | 13 Dec 2006 | 17 May 2010 | England | February 1966 | Park View House, 65 London Road, Newbury, Berkshire, RG14 1JN |