| MCCARTHY, Gerard John, Dr ACTIVE | Director | 01 Feb 2024 | | Scotland | November 1964 | Zetex Technology Park, Chadderton, Oldham, Lancashire, OL9 9LL |
| WHITMIRE, Brett ACTIVE | Director | 23 Jul 2019 | | United States | July 1965 | Zetex Technology Park, Chadderton, Oldham, Lancashire, OL9 9LL |
| GREENE, Colin Keith RESIGNED | Secretary | 11 Jul 2008 | 20 Dec 2013 | | | 15 Rippon Hall Avenue, Ramsbottom, Bury, Lancashire, BL0 9RE |
| MORTON, Julia Alison RESIGNED | Secretary | 01 Mar 2002 | 11 Jul 2008 | | | 5, Kingsdown Close, Wychwood Park, Weston, Cheshire, CW2 5FX, United Kingdom |
| SEFTON, Michael Edward RESIGNED | Secretary | | 01 Oct 1993 | | | Oak Cottage Cuckoos Knob, Wootton Rivers, Marlborough, Wiltshire, SN8 4NR |
| SHARP, Lorraine RESIGNED | Secretary | 01 Oct 1993 | 01 Mar 2002 | | | 168 Ember Lane, Esher, Surrey, KT10 8EJ |
| AIREY, Elisabeth Patricia RESIGNED | Director | 31 Jan 2000 | 09 Jun 2008 | England | January 1959 | 20 St Jamess Walk, London, EC1R 0AP |
| CONWAY, Robert David RESIGNED | Director | 08 Mar 2004 | 01 Feb 2006 | | August 1944 | 10 Harrop Green, Diggle, Oldham, Lancashire, OL3 5LW |
| COTTERILL, Roy Clifford George RESIGNED | Director | | 15 Mar 1993 | | March 1936 | 102 Evesham Road, Cheltenham, Gloucestershire, GL52 2AL |
| CURTIS, Timothy Malise RESIGNED | Director | | 31 Aug 2004 | | August 1942 | Street Farmhouse, Vernham Street, Andover, Hampshire, SP11 0EL |
| DELACAVE, Jacques Theodore Louis RESIGNED | Director | | 01 Jun 1994 | | August 1933 | Flat N 56 Warwick Square, London, SW1V 2AJ |
| GARDENER, William Kenneth RESIGNED | Director | | 28 Apr 2000 | | January 1927 | 15 Ennismore Mews, London, SW7 1AP |
| GASKELL, Colin Simister RESIGNED | Director | 01 Jun 1994 | 23 Apr 2004 | United Kingdom | May 1937 | Sequoia Lodge, Oakhurst Avenue, Harpenden, Hertfordshire, AL5 2ND |
| GEH, Martin Thein E RESIGNED | Director | 14 Oct 2004 | 09 Jun 2008 | | November 1965 | 16a Lornie Road, Singapore, 298702, FOREIGN, Singapore |
| GREENE, Colin Keith RESIGNED | Director | 08 Mar 2004 | 20 Dec 2013 | England | October 1956 | 15 Rippon Hall Avenue, Ramsbottom, Bury, Lancashire, BL0 9RE |
| HAWKINS, Nick Bryan RESIGNED | Director | 03 Apr 2006 | 20 Feb 2008 | | May 1961 | 2 Weaver Close, Bowdon, Cheshire, WA14 3FY |
| HOLLAND, Julie Ann RESIGNED | Director | 09 Dec 2019 | 20 Feb 2023 | United States | February 1962 | 4949, Hedgecoxe Road, Suite 100, Plano, Texas, 75024, United States |
| KING, Mark RESIGNED | Director | 09 Jun 2008 | 19 Jan 2018 | Usa | June 1958 | 4984, Kilburn Ct, Oak Park, California 91377, United States Of America |
| LU, Keh-Shew, Dr RESIGNED | Director | 09 Jun 2008 | 09 Dec 2019 | United States | October 1946 | 5109 Runnin River Drive, Plano, Texas 75093, United States |
| MONAGHAN, Timothy RESIGNED | Director | 19 Jan 2018 | 02 Feb 2024 | United Kingdom | March 1963 | Zetex Technology Park, Chadderton, Oldham, Lancashire, OL9 9LL |
| NORTON, Michael James, Professor RESIGNED | Director | 02 Oct 2000 | 09 Jun 2008 | United Kingdom | December 1952 | 179b Kimbolton Road, Bedford, Bedfordshire, MK41 8DR |
| RATTRAY, Bruce Davidson RESIGNED | Director | | 16 Jul 2004 | United Kingdom | July 1948 | The Little House 34 Parkway, Camberley, Surrey, GU15 2PE |
| ROCHUSSEN, Gavin Mark RESIGNED | Director | 28 May 1998 | 11 Feb 2002 | | September 1959 | 41 Fifth Avenue, Illoso Johannesburg, South Africa |
| ROHRER, Hans RESIGNED | Director | 01 Feb 2006 | 30 Sep 2020 | England | December 1949 | 11a, Senserbergstr, Fuerstenfeldbruck, 82256, Germany |
| SAMUEL, John William Young Strachan RESIGNED | Director | 01 Jul 2004 | 28 Feb 2006 | England | July 1956 | Charnwood Easby Drive, Ilkley, West Yorkshire, LS29 9AZ |
| SAYERS, John William Cornelius RESIGNED | Director | 21 Apr 1994 | 08 Mar 1996 | | March 1946 | 18 Nel Avenue, Randpark Ridge, Republic Of South Africa 2156 |
| SNEDDEN, Donald Cameron RESIGNED | Director | | 25 May 1993 | | December 1937 | The Gables, 108a Kloof Road, Bedfordview 2008, FOREIGN, South Africa |
| STRIDE, Charles Arthur RESIGNED | Director | | 09 Mar 1994 | | January 1941 | 60 Fourth Street, Houghton 2198, Johannesburg 2198, South Africa, FOREIGN |
| VENTER, Robert Eben RESIGNED | Director | 25 May 1993 | 09 Jun 2008 | South Africa | May 1960 | 3 Palala Road, Westcliff 2193, Johannesburg Gauteng, FOREIGN, Republic Of South Africa |
| VENTER, William Peter, Doctor RESIGNED | Director | 09 Mar 1994 | 29 Jul 2004 | | July 1934 | 167 Empire Placead, Sandhurst Sandton 2196, Johannesburg, FOREIGN, Republic Of South Africa |
| WAITE, Barry RESIGNED | Director | 25 Jul 2003 | 09 Jun 2008 | | August 1948 | 1400 Rockcliff Road, Austin, Texas 78746, Usa |
| WALSH, Arthur Stephen RESIGNED | Director | | 31 Oct 1997 | | August 1926 | Aiglemont, Trout Rise Loudwater, Rickmansworth, Hertfordshire, WD3 |
| WHITE, Richard Dallas RESIGNED | Director | 09 Jun 2008 | 23 Jul 2019 | United States | November 1947 | 5907, Twin Coves Street, Dallas, Texas 75248, United States |