| 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 |
| Alan Edward Birch | Director | 5 Sept 2007 | 4 Feb 2014 | British | 56 years |
| Andrew John Sutton | Director | 2 Aug 2001 | 11 Feb 2004 | British | 70 years |
| Andrew Matthews | Director | 28 Jun 2002 | 22 Dec 2005 | British | 64 years |
| Andrew Richard Kershaw | Director | 3 Mar 2016 | 29 Aug 2017 | British | 61 years |
| Bruce Warren Dalgleish | Director | 22 Dec 2005 | 7 Dec 2006 | British | 59 years |
| Bryan Robin Geoffrey Gilbert Smith | Director | 4 Oct 2001 | 28 Jun 2002 | British | 82 years |
| Daniel John William Korosi | Director | 21 Jun 2019 | 6 Jan 2023 | British | 50 years |
| Geoffrey Keith Howard Mason | Director | 26 Jan 2001 | 4 Oct 2001 | British | 72 years |
| Gordon James Wilson | Director | 8 Jun 2001 | 4 Oct 2001 | British | 59 years |
| Harvey John William Pownall | Director | 12 Jan 2009 | 3 Sept 2012 | British | 60 years |
| Henry Lafferty | Director | 26 Jan 2001 | 2 Aug 2001 | British | 73 years |
| Julia Sarah Mccabe | Director | 3 Sept 2012 | 21 Jun 2019 | British | 56 years |
| Kevin Humphreys | Director | 2 Jan 2008 | 12 Jan 2009 | British | 63 years |
| Nicholas Howard Stovold | Director | 27 Jun 2014 | 29 Aug 2017 | British | 47 years |
| Patrick Hugh Gardiner | Director | 18 Oct 2001 | 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 |
| Richard Little | Director | 4 Feb 2014 | 1 Nov 2022 | British | 47 years |
| Robert Nigel Johnson | Director | 11 Feb 2004 | 15 Jun 2004 | British | 68 years |
| Robert Sean Mcclatchey | Director | 4 Oct 2001 | 22 Dec 2005 | British | 61 years |
| Roger Harold Potts | Director | 26 Jun 2001 | 4 Oct 2001 | British | 73 years |
| Secretariat Services Limited | Corporate Secretary | 26 Jan 2001 | 1 Sept 2005 | United Kingdom | - |
| Stephen Paul Hornby | Director | 20 May 2009 | 21 Jun 2019 | British | 69 years |
| William Robert Doughty | Director | 26 Aug 2004 | 2 Jan 2008 | British | 58 years |