| Allan Peter Michaelson | Director | 20 Jan 1997 | 31 Mar 1998 | British | 85 years |
| Andrew David Cowan | Director | 9 Feb 2009 | 31 Dec 2010 | British | 60 years |
| Andrew Mclean Dowds | Director | 17 May 2002 | 28 Feb 2003 | British | 66 years |
| Andrew Prescott | Director | 16 Sept 2010 | 29 Apr 2011 | British | 51 years |
| Arthur Vincent Ferry | Director | 20 Jan 1997 | 6 Aug 1999 | British | 75 years |
| Brian Lynn Staples | Director | 28 Feb 1997 | 21 Jul 1997 | British | 81 years |
| Charles Thomas Cornish | Director | 12 May 2008 | 30 Sept 2010 | British | 67 years |
| Christopher John Brook | Director | 9 Jul 2003 | 5 Dec 2007 | British | 67 years |
| David John Kilgour | Director | 11 Dec 2007 | 12 May 2008 | British | 65 years |
| David Scott Fleming | Director | 7 Jan 2002 | 28 Jun 2002 | British | 64 years |
| Douglas William Coleman | Director | 30 Jun 2006 | 11 Apr 2007 | British | 74 years |
| Gareth Michael Davies | Director | 29 Apr 2011 | 27 Jun 2013 | British | 57 years |
| Gary Lee Baron | Director | 24 Aug 2018 | 22 Jul 2022 | British | 45 years |
| Gordon Arthur Ivan Waters | Director | 20 Jan 1997 | 24 Dec 2006 | British | 79 years |
| Gordon Joseph Martin Tregaskis | Director | 20 Jan 1997 | 7 Jan 2002 | British | 71 years |
| Gordon Joseph Martin Tregaskis | Director | 15 Oct 2002 | 23 Sept 2004 | British | 71 years |
| Ian John Alexander Plenderleith | Director | 12 May 2008 | 18 May 2009 | British | 63 years |
| James Miller Perrie | Director | 18 May 2009 | 30 Sept 2010 | British | 64 years |
| James Richards Waddicor | Director | 15 Aug 1992 | 7 Aug 1992 | British | 89 years |
| John Richard Tetlow | Director | 27 Sept 1993 | 31 Dec 1997 | British | 84 years |
| John Richard Tetlow | Secretary | 4 Aug 1995 | 16 Oct 1997 | British | - |
| Jonathan Andrew Hodgkin | Director | 21 Feb 2014 | 30 Sept 2017 | British | 65 years |
| Joseph Francis Dearden | Director | 23 May 2000 | 7 Jan 2002 | British | 73 years |
| Kevin Starling | Director | 2 Apr 2007 | 12 May 2008 | British | 62 years |
| Leslie Anthony Bell | Director | 7 Jan 2002 | 2 Apr 2007 | British | 76 years |
| Leslie Anthony Bell | Director | 11 Apr 2007 | 31 Mar 2010 | British | 76 years |
| Martin Anthony Gee | Director | 27 Jun 2013 | 31 Mar 2021 | British | 49 years |
| Martin Geoffrey Beesley | Director | 12 May 2008 | 29 Aug 2008 | British | 60 years |
| Michael John Edwards | Director | 23 May 2000 | 11 Apr 2007 | British | 71 years |
| Michael John Edwards | Director | 5 Dec 2007 | 12 May 2008 | British | 71 years |
| Paul Christopher Franks | Director | 15 Aug 1992 | 4 Aug 1995 | British | 82 years |
| Paul Christopher Franks | Secretary | 15 Aug 1992 | 4 Aug 1995 | British | - |
| Paul Warwick Capell | Director | 7 Jun 2007 | 27 Sept 2007 | British | 69 years |
| Peter Norman Applewhite | Director | 27 Sept 1993 | 30 Sept 2001 | British | 81 years |
| Peter Norman Applewhite | Secretary | 16 Oct 1997 | 31 Mar 1998 | British | - |
| Robert James Ferguson | Director | 28 Feb 1997 | 31 Mar 2000 | British | 84 years |
| Robert Jerome Boland | Director | 15 Aug 1992 | 30 Nov 1994 | British | 81 years |
| Simon George Batey | Director | 23 May 2000 | 28 Jul 2006 | British | 73 years |
| Steven Richard Fraser | Director | 21 Feb 2014 | 28 Aug 2019 | British | 51 years |
| Timothy Michael Rayner | Director | 25 Nov 1997 | 7 Jan 2002 | British | 66 years |
| Timothy Michael Rayner | Secretary | 1 Apr 1998 | 8 Mar 2001 | British | - |
| Uu Directorate Limited | Corporate Director | 29 Apr 2011 | 19 Aug 2011 | United Kingdom | - |