| Andrew James Jackson Dawson | Director | 4 Dec 1991 | 27 Jul 1999 | British | 78 years |
| Andrew James Jackson Dawson | Director | 5 Jan 2005 | 18 Jun 2009 | British | 78 years |
| Andrew John Bowman | Director | 26 Feb 2015 | 5 Mar 2018 | British | 54 years |
| Ann Hird | Director | 9 Dec 2010 | 15 Nov 2012 | British | 69 years |
| Anthony Nicholas Greatorex | Director | 3 Feb 2014 | 3 Sept 2014 | British | 58 years |
| Capita Corporate Director Limited | Corporate Director | 18 Jun 2009 | 18 Jun 2009 | United Kingdom | - |
| Charles Douglas Scott | Director | 4 Dec 1991 | 31 Mar 2000 | British | 85 years |
| Clive Martin Grimley | Director | 9 Aug 1999 | 4 Jun 2003 | British | 72 years |
| Colin Douglas Bamford | Director | 5 Jan 2005 | 26 Jul 2007 | British | 78 years |
| David George Brooks | Director | 30 Oct 2001 | 12 Nov 2007 | British | 77 years |
| David William Crawford | Director | 30 Aug 2013 | 6 Dec 2013 | British | 56 years |
| Douglas Lindsay Hay Laver | Director | 1 Oct 2012 | 3 Feb 2014 | British | 61 years |
| Eamonn Martin O Connor | Director | 27 Jul 1999 | 31 Mar 2002 | British | 63 years |
| Eamonn Martin O'connor | Director | 4 Jun 2003 | 4 Nov 2005 | British | 63 years |
| Ian Edward Jarvis | Director | 3 Feb 2014 | 26 Feb 2015 | British | 55 years |
| Jean Sporton | Director | 25 May 1993 | 27 Jul 1999 | British | 76 years |
| John Mark Dean | Director | 14 Nov 2002 | 2 Sept 2004 | British | 62 years |
| Juergen Werner Meng | Director | 1 Aug 2005 | 29 Jan 2007 | German | 79 years |
| Martin Frederick West | Director | 5 Jan 2005 | 18 Jun 2009 | British | 65 years |
| Michael Addenbrooke | Director | 18 Jun 2009 | 5 Oct 2012 | British | 71 years |
| Michael Martin | Director | 4 Dec 1991 | 12 Jun 1995 | British | 83 years |
| Morag Ann Bramley | Director | 15 Nov 2002 | 26 Mar 2003 | British | 62 years |
| Nicholas Mckenzie Herbert Burns | Director | 5 Oct 2012 | 12 Aug 2014 | British | 59 years |
| Nicolas Norman Bedford | Director | 13 Nov 2009 | 22 Sept 2010 | British | 67 years |
| Paul Bernard Clark | Director | 27 Jul 1999 | 31 Mar 2002 | British | 69 years |
| Philip Charles Braithwaite | Director | 18 Jun 2009 | 1 Dec 2011 | British | 75 years |
| Robert Mackenzie Morison | Director | 4 Dec 1991 | 23 Oct 1995 | Scottish | 100 years |
| Rodney James Jagelman | Director | 27 Jul 1999 | 31 Mar 2002 | British | 75 years |
| Sean Patrick Breslin | Director | 4 Dec 1991 | 4 Jun 2003 | British | 79 years |
| Sean Patrick Breslin | Director | 30 Jan 2007 | 18 Jun 2009 | British | 79 years |
| Simon John Davies | Director | 18 Jun 2009 | 19 Oct 2009 | British | 58 years |
| Stephen David Parkinson | Director | 18 Jun 2009 | 27 May 2012 | British | 63 years |
| Stephen Sharp | Director | 1 Nov 2011 | 3 Feb 2014 | British | 61 years |
| Susan Elspeth Curley | Director | 1 May 2007 | 18 Jun 2009 | British | 67 years |
| Susan Lesley Ring | Director | 12 Aug 2014 | 5 Mar 2018 | British | 65 years |
| Thomas Kelman | Director | 4 Dec 1991 | 27 Jul 1999 | British | 65 years |
| Thomas Kelman | Secretary | 4 Dec 1991 | 31 May 2005 | British | - |
| Thomas Peregrine Calvert-lee | Secretary | 31 May 2005 | 18 Jun 2009 | British | - |
| William Graham Christie Sharp | Director | 5 Jan 2005 | 31 Jul 2007 | British | 80 years |