| Alan Edward Birch | Director | 8 Nov 2004 | 7 Dec 2006 | British | 55 years |
| Alan Edward Birch | Director | 5 Sept 2007 | 31 Oct 2017 | British | 55 years |
| Barry Simon Williams | Director | 13 Apr 2004 | 14 Aug 2007 | British | 55 years |
| David James Ellis | Secretary | 2 Mar 2005 | 1 Sept 2005 | British | - |
| Geoffrey Keith Howard Mason | Director | 15 Jan 2004 | 13 Apr 2004 | British | 71 years |
| Ian Richard Gethin | Director | 2 Jan 2008 | 15 Sept 2011 | British | 54 years |
| Jonathan Michael Simpson | Director | 31 Oct 2017 | 31 Mar 2023 | British | 52 years |
| Margaret Louise Mellor | Director | 15 Jan 2004 | 13 Apr 2004 | British | 65 years |
| Paul Mcculloch | Director | 8 Nov 2004 | 18 Dec 2006 | British | 60 years |
| Ppp Nominee Directors Limited | Corporate Director | 15 Sept 2011 | 31 Oct 2017 | United Kingdom | - |
| Robert Nigel Johnson | Director | 29 Mar 2004 | 13 Apr 2004 | British | 67 years |
| Robert William Kendall | Director | 29 Mar 2004 | 13 Apr 2004 | British | 72 years |
| Secretariat Services Limited | Corporate Secretary | 15 Jan 2004 | 2 Mar 2005 | United Kingdom | - |
| William Robert Doughty | Director | 13 Apr 2004 | 2 Jan 2008 | British | 57 years |