| Alan George Burns | Director | 5 May 2017 | 8 May 2019 | British | 50 years |
| Alan Menzies Bell | Director | 1 Jan 1999 | 30 Dec 2001 | Scottish | 78 years |
| Ashley Readshaw | Director | 1 Sept 1993 | 17 Jan 1997 | British | 67 years |
| Barry John Price | Director | 1 Jan 1995 | 31 Dec 1995 | British | 82 years |
| Christopher Baker | Director | 1 Sept 1992 | 23 May 1993 | British | 79 years |
| Christopher Charles Bolingbroke Waights | Director | 13 Apr 1994 | 1 Jan 1995 | British | 74 years |
| Christopher Lindsay Christian | Secretary | 1 Sept 1992 | 24 Nov 1994 | British | - |
| David John Jones | Director | 14 May 2003 | 7 May 2009 | British | 78 years |
| David Pulman | Director | 24 Jan 1997 | 14 May 2003 | British | 72 years |
| Erika Patteson-brent | Director | 25 Aug 2020 | 29 Sept 2021 | British | 48 years |
| Franz Bernhard Humer | Director | 1 Sept 1992 | 12 May 1993 | Swiss | 79 years |
| Freek Jongen | Director | 1 Oct 2017 | 25 Aug 2020 | Dutch | 45 years |
| Glaxo Group Limited | Corporate Director | 11 Sept 2002 | 21 Jul 2003 | United Kingdom | - |
| Graham John Vitty | Director | 1 Sept 1992 | 3 Nov 1994 | British | 78 years |
| Graham Joseph Blaker | Director | 1 Sept 1992 | 1 Jun 1998 | British | 79 years |
| Ian Alexander Thomson Mcinnes | Director | 3 Mar 1993 | 11 Oct 1996 | British | 73 years |
| Ian Cardwell | Director | 23 Feb 2010 | 31 Dec 2011 | British | 62 years |
| Ian Mccubbin | Director | 5 Jul 2013 | 31 Mar 2017 | British | 69 years |
| James Kennedy | Director | 1 Sept 1992 | 1 Feb 1993 | British | 90 years |
| Jean Paul Reynaud | Director | 14 May 2003 | 12 Jul 2013 | British | 71 years |
| Jeffrey Royston Baxter | Director | 2 May 1997 | 19 Dec 2001 | British | 64 years |
| John Bell Elliot | Director | 14 May 2003 | 31 Dec 2006 | British | 74 years |
| John Malcolm Padfield | Director | 1 Sept 1992 | 31 Mar 1994 | British | 78 years |
| John Stanley Higham | Director | 1 Sept 1992 | 3 Mar 1993 | British | 83 years |
| Joseph Caldwell | Director | 20 Jan 1997 | 19 Aug 1998 | British | 76 years |
| Joseph James Power | Director | 22 Mar 2019 | 31 Dec 2020 | Irish | 61 years |
| Matthew Creighton Adcock | Director | 9 Apr 2013 | 1 Jul 2014 | British | 57 years |
| Neil O'hara | Director | 23 Feb 2010 | 9 Apr 2013 | British | 52 years |
| Paul Lawrence Bruce | Director | 15 Sept 1997 | 18 Dec 1998 | British | 70 years |
| Philip Edward Parkes | Director | 1 Sept 1992 | 31 Aug 1993 | British | 82 years |
| Philip Henry Keller | Director | 2 Aug 1997 | 12 Sept 1997 | British | 60 years |
| Regis Jean-pierre Simard | Director | 18 May 2016 | 2 May 2019 | French | 60 years |
| Riccardo Calliano | Director | 21 Jul 2014 | 1 Oct 2017 | Italian | 53 years |
| Richard James Stephens | Secretary | 21 Jul 2003 | 5 Mar 2007 | British | - |
| Richard John Latchford | Director | 7 May 2021 | 19 Feb 2022 | British | 46 years |
| Sheila Mullins | Director | 22 Mar 2019 | 25 Aug 2020 | Irish | 60 years |
| Simon Christopher Cartmell | Director | 1 Jun 1993 | 1 Jan 1995 | British | 65 years |
| Simon Michael Bicknell | Secretary | 24 Nov 1994 | 18 Dec 1998 | British | - |
| Stanley Clive Challoner | Director | 1 Sept 1992 | 31 Jan 1994 | British | 88 years |
| Stephen Jordan | Director | 14 May 2003 | 23 Feb 2010 | British | 72 years |
| Stuart Hepburn | Director | 4 Jan 2012 | 1 May 2016 | British | 53 years |
| Timothy Cyril Tyson | Director | 1 Jun 1998 | 1 Dec 2002 | Us Citizen | 73 years |
| Timothy John Miller | Director | 1 Jan 1999 | 2 Jun 2000 | British | 68 years |