| Alan Edward Birch | Director | 2 Jul 2003 | 27 Aug 2004 | British | 56 years |
| Alan Edward Birch | Director | 8 Nov 2004 | 7 Dec 2006 | British | 56 years |
| Andrew John Sutton | Director | 6 Dec 2002 | 11 Feb 2004 | British | 70 years |
| Barry Simon Williams | Director | 18 Feb 2005 | 14 Aug 2007 | British | 56 years |
| Brian Mervyn Semple | Director | 2 Jan 2008 | 26 Aug 2009 | British | 80 years |
| Colin Norman | Director | 18 Dec 2009 | 5 Dec 2013 | British | 77 years |
| Gary Nelson Robert Honeyman Brown | Director | 5 Dec 2013 | 10 May 2018 | British | 51 years |
| Geoffrey Keith Howard Mason | Director | 1 May 2002 | 6 Dec 2002 | British | 72 years |
| Harvey John William Pownall | Director | 12 Jan 2009 | 5 Dec 2013 | British | 60 years |
| Harvey John William Pownall | Director | 10 May 2018 | 30 May 2025 | British | 60 years |
| Ian Richard Gethin | Director | 18 Feb 2005 | 2 Jan 2008 | British | 55 years |
| Jonathan Mark Entract | Director | 6 Dec 2002 | 18 Feb 2005 | British | 54 years |
| Kevin Humphreys | Director | 2 Jan 2008 | 12 Jan 2009 | British | 63 years |
| Margaret Louise Mellor | Director | 1 May 2002 | 6 Dec 2002 | British | 66 years |
| Mark Richard Woodhams | Director | 6 Dec 2002 | 18 Feb 2005 | British | 60 years |
| Patrick Hugh Gardiner | Director | 6 Dec 2002 | 7 Jun 2004 | British | 77 years |
| Paul George Milner | Director | 7 Jun 2004 | 15 Jun 2004 | British | 65 years |
| Paul Mcculloch | Director | 8 Nov 2004 | 18 Dec 2006 | British | 61 years |
| Robert Nigel Johnson | Director | 11 Feb 2004 | 15 Jun 2004 | British | 68 years |
| Russell George Sparks | Director | 27 Jun 2014 | 17 Apr 2018 | British | 55 years |
| Secretariat Services Limited | Corporate Secretary | 1 May 2002 | 1 Sept 2005 | United Kingdom | - |
| William Robert Doughty | Director | 26 Aug 2004 | 2 Jan 2008 | British | 58 years |