| Andrew David Cowan | Director | 30 Sept 2010 | 31 Dec 2010 | British | 60 years |
| Andrew Mclean Dowds | Director | 21 May 2002 | 28 Feb 2003 | British | 66 years |
| Andrew Prescott | Director | 20 Oct 2010 | 29 Apr 2011 | British | 51 years |
| Anthony Wernham | Director | 10 Mar 1993 | 31 Mar 1994 | British | 91 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 Mark Hannon | Director | 23 Dec 2010 | 31 Dec 2023 | British | 50 years |
| David Scott Fleming | Director | 7 Jan 2002 | 28 Jun 2002 | British | 64 years |
| Gordon Arthur Ivan Waters | Director | 31 Jul 1998 | 31 Oct 2002 | British | 79 years |
| Gordon Joseph Martin Tregaskis | Director | 4 Sept 1992 | 7 Jan 2002 | British | 71 years |
| Gordon Joseph Martin Tregaskis | Director | 15 Oct 2002 | 6 Apr 2006 | British | 71 years |
| Ian John Alexander Plenderleith | Director | 12 May 2008 | 18 May 2009 | British | 63 years |
| James Miller Perrie | Director | 18 May 2009 | 8 Oct 2010 | British | 64 years |
| John Richard Tetlow | Director | 10 Mar 1993 | 31 Dec 1997 | British | 84 years |
| John Richard Tetlow | Secretary | 4 Sept 1992 | 24 Oct 1997 | British | - |
| 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 | 14 Jun 2007 | 31 Mar 2010 | British | 76 years |
| Martin Anthony Gee | Director | 13 Aug 2013 | 31 Mar 2021 | British | 49 years |
| Martin Geoffrey Beesley | Director | 12 May 2008 | 29 Aug 2008 | British | 60 years |
| Michael John Edwards | Director | 5 Dec 2007 | 12 May 2008 | British | 71 years |
| Paul Warwick Capell | Director | 14 Jun 2007 | 27 Sept 2007 | British | 69 years |
| Peter Norman Applewhite | Director | 10 Mar 1993 | 30 Sept 2001 | British | 81 years |
| Peter Norman Applewhite | Secretary | 24 Oct 1997 | 30 Sept 2001 | British | - |
| Robert James Ferguson | Director | 12 Oct 1992 | 31 Mar 2000 | British | 84 years |
| Robert Peter Thian | Director | 4 Sept 1992 | 19 Nov 1993 | British | 83 years |
| Sarah Louise Illingworth | Director | 29 Apr 2011 | 27 Sept 2013 | British | 49 years |
| Simon George Batey | Director | 8 May 2000 | 28 Jul 2006 | British | 73 years |
| Stephen Frederick Mcadam | Director | 4 Sept 1992 | 12 Oct 1992 | British | 73 years |
| Timothy Michael Rayner | Director | 31 Dec 1997 | 7 Jan 2002 | British | 66 years |
| Timothy Peter Weller | Director | 1 Aug 2006 | 1 Aug 2006 | British | 63 years |
| Uu Directorate Limited | Corporate Director | 29 Apr 2011 | 19 Aug 2011 | United Kingdom | - |