| GHINN, Sarah ACTIVE | Director | 26 Oct 2020 | | England | August 1963 | 980, Great West Road, Brentford, Middlesex, TW8 9GS |
| SADLER, John Michael ACTIVE | Director | 26 Oct 2020 | | England | March 1956 | 980, Great West Road, Brentford, Middlesex, TW8 9GS |
| BECKWITH, Moira Aileen RESIGNED | Secretary | 09 Aug 2001 | 31 Jul 2017 | | | 980 Great West Road, Brentford, Middlesex, TW8 9GS |
| LISTER, Neil RESIGNED | Secretary | 22 May 1997 | 09 Aug 2001 | | | 163 Wood Street, Chelmsford, Essex, CM2 8BJ |
| MARTIN, Frederick John RESIGNED | Secretary | 01 May 1992 | 22 May 1997 | | | 2 Artillery Row, Gravesend, Kent, DA12 1LY |
| STEVENS, William David RESIGNED | Secretary | | 30 Apr 1992 | | | 82 Morton Way, Southgate, London, N14 7HR |
| ARONSON, Gerrit Olaf RESIGNED | Director | 19 Mar 1993 | 07 Nov 1996 | | May 1950 | Ballintrae Abbots Drive, Virginia Water, Surrey, GU25 4SF |
| COLLINGE, Robert RESIGNED | Director | 05 Apr 2004 | 07 Feb 2006 | | January 1947 | 980 Great West Road, Brentford, Middlesex, TW8 9GS |
| COOMBE, John David RESIGNED | Director | 15 Oct 1996 | 31 Mar 2005 | | March 1945 | Langdon Burtons Way, Chalfont St Giles, Buckinghamshire, HP8 4BW |
| CORNESS, Colin Ross, Sir RESIGNED | Director | 15 Oct 1996 | 31 Dec 1999 | | October 1931 | Piplye Cottage, Cinder Hill Sharpthorne, East Grinstead, Sussex, RH19 4HZ |
| FORD, James Robert Anthony RESIGNED | Director | 19 May 2005 | 28 Jul 2006 | | November 1966 | 980 Great West Road, Brentford, Middlesex, TW8 9GS |
| FRAME, Alistair Gilchrist, Sir RESIGNED | Director | | 31 Aug 1993 | | April 1929 | Pine Cottage, Holmbury St Mary, Dorking, Surrey, RH5 6PF |
| GLEDHILL, Gisela Maria Aloisia RESIGNED | Director | 01 Aug 1992 | 30 Jun 1995 | | July 1944 | 45 Markham Street, London, SW3 3NR |
| HOBBS, Peter Thomas Goddard RESIGNED | Director | | 14 Sep 1992 | England | March 1938 | 105 Blenheim Crescent, London, W11 2EQ |
| LLOYD, Dinah Kathleen RESIGNED | Director | 23 Oct 2000 | 09 Aug 2001 | | July 1948 | 15 Chiltern Hills Road, Beaconsfield, Buckinghamshire, HP9 1PL |
| MEHEW, Anthony John RESIGNED | Director | 09 Aug 2001 | 31 Jul 2017 | United Kingdom | January 1944 | 980, Great West Road, Brentford, Middlesex, TW8 9GS |
| MITCHELL, Harry RESIGNED | Director | | 31 Jul 1992 | | October 1930 | 13 Garrick Gardens, East Molesey, Surrey, KT8 1SL |
| MULLOCK, Nicole RESIGNED | Director | 15 Sep 2017 | 23 Oct 2020 | United Kingdom | August 1980 | Gsk House, 980 Great West Road, Brentford, Middlesex, TW8 9GS, United Kingdom |
| STEVENS, Michael Anthony RESIGNED | Director | 24 Nov 1994 | 31 Dec 1995 | England | March 1945 | 2 Springs Close, Ellesborough, Aylesbury, Buckinghamshire, HP17 0XE |
| EDINBURGH PHARMACEUTICAL INDUSTRIES LIMITED RESIGNED | Director | 16 Aug 2006 | 27 Oct 2020 | | | Shewalton Road, Irvine, Ayrshire, KA11 5AP |
| GLAXO GROUP LIMITED RESIGNED | Director | 16 Aug 2006 | 27 Oct 2020 | | | 980, Great West Road, Brentford, Middlesex, TW8 9GS, England |