| Alan Edward Birch | Director | 20 Nov 2003 | 27 Aug 2004 | British | 56 years |
| Alan Edward Birch | Director | 8 Nov 2004 | 7 Dec 2006 | British | 56 years |
| Alan Edward Birch | Director | 1 Dec 2007 | 4 Feb 2014 | British | 56 years |
| Andrew John Sutton | Director | 11 Sept 2003 | 11 Feb 2004 | British | 70 years |
| Andrew Matthews | Director | 11 Sept 2003 | 22 Dec 2005 | British | 64 years |
| Andrew Richard Kershaw | Director | 27 Jun 2014 | 12 Aug 2025 | British | 61 years |
| Geoffrey Keith Howard Mason | Director | 24 Jan 2003 | 11 Sept 2003 | British | 72 years |
| Ian Richard Gethin | Director | 2 Jan 2008 | 15 Sept 2011 | British | 55 years |
| Margaret Louise Mellor | Director | 24 Jan 2003 | 11 Sept 2003 | British | 66 years |
| Patrick Hugh Gardiner | Director | 11 Sept 2003 | 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 |
| Ppp Nominee Directors Limited | Corporate Director | 15 Sept 2011 | 31 Oct 2017 | United Kingdom | - |
| Robert Nigel Johnson | Director | 11 Feb 2004 | 15 Jun 2004 | British | 68 years |
| Robert Sean Mcclatchey | Director | 11 Sept 2003 | 22 Dec 2005 | British | 61 years |
| Secretariat Services Limited | Corporate Secretary | 24 Jan 2003 | 1 Sept 2005 | United Kingdom | - |
| William Robert Doughty | Director | 26 Aug 2004 | 2 Jan 2008 | British | 58 years |