| Alexander James William Haynes | Director | 4 Feb 2019 | 18 Feb 2021 | British | 34 years |
| Aviva Company Secretarial Services Limited | Corporate Secretary | 1 Dec 2004 | 28 Jun 2007 | United Kingdom | - |
| Cathryn Elizabeth Riley | Director | 2 Aug 2004 | 22 May 2006 | British | 64 years |
| Cathryn Elizabeth Riley | Director | 2 Jul 2008 | 31 Dec 2008 | British | 64 years |
| Charles Andrew Anderson | Director | 1 Sept 2000 | 27 Sept 2001 | British | 71 years |
| Clair Louise Marshall | Director | 1 Aug 2015 | 29 Sept 2017 | British | 65 years |
| Cornelis Antonius Carolus Maria Schrauwers | Director | 1 Jan 1998 | 19 Oct 1998 | Dutch | 79 years |
| David Barclay Barral | Director | 1 Sept 2005 | 22 May 2006 | British | 64 years |
| David Barclay Barral | Director | 26 Mar 2009 | 24 Sept 2012 | British | 64 years |
| David Ian Wishart Reynolds | Director | 1 Jan 1994 | 19 Oct 1998 | British | 83 years |
| David Rowley Rose | Director | 20 Nov 2018 | 31 Dec 2020 | British | 76 years |
| Gary Nigel Withers | Director | 1 Sept 2002 | 31 Mar 2006 | British | 64 years |
| Gillian Margaret Vance | Director | 19 Oct 1998 | 30 Nov 2004 | British | 72 years |
| Graham Michael Berville | Director | 19 Oct 1998 | 1 Sept 2000 | British | 70 years |
| Helen Potter | Director | 31 Dec 2020 | 6 Aug 2025 | British,german | 44 years |
| James Allen Newman | Director | 22 Nov 2001 | 1 Jun 2005 | British | 62 years |
| Jennifer Jane Wilman | Director | 24 Sept 2012 | 31 Aug 2015 | British | 70 years |
| Jennifer Jane Wilman | Secretary | 27 Jun 2007 | 31 Aug 2015 | British | - |
| John Ainley | Director | 2 Aug 2004 | 31 Mar 2006 | British | 70 years |
| John Gordon Thomas Carter | Director | 22 Mar 1991 | 31 Dec 1993 | British | 89 years |
| John Howard Webb | Director | 22 Mar 1991 | 31 Dec 1993 | British | 92 years |
| John Robert Lister | Director | 1 Sept 2005 | 24 Sept 2012 | British | 68 years |
| Keith Nigel Grant | Director | 22 Mar 1991 | 27 Feb 1998 | British | 72 years |
| Keith Nigel Grant | Secretary | 22 Mar 1991 | 30 Jun 1998 | British | - |
| Keith William Abercromby | Director | 28 Nov 2005 | 14 Sept 2006 | British | 62 years |
| Linda Hall | Director | 31 Aug 2017 | 4 Feb 2019 | British | 70 years |
| Mark Steven Hodges | Director | 19 May 2006 | 30 Apr 2010 | British | 61 years |
| Michael Norris Urmston | Director | 19 Oct 1998 | 28 Nov 2005 | British | 77 years |
| Michael Terence Kirsch | Director | 1 Sept 2000 | 22 May 2006 | British | 65 years |
| Monica Risam | Director | 26 May 2017 | 31 Aug 2017 | British,american | 54 years |
| Nicholas Andrew Courtenay-smith | Director | 1 Sept 2000 | 31 Dec 2001 | British | 76 years |
| Nicolaos Nicandrou | Director | 16 Oct 2006 | 27 Apr 2009 | British | 61 years |
| Patrick Joseph Robert Snowball | Director | 19 May 2006 | 3 May 2007 | British | 76 years |
| Peter Edward Hessey | Director | 1 Sept 2000 | 2 Aug 2004 | British | 75 years |
| Peter Geoffrey Ward | Director | 22 Mar 1991 | 27 Feb 1998 | English | 84 years |
| Peter Robert Hales | Director | 19 Oct 1998 | 1 Sept 2005 | British | 80 years |
| Peter Thomas Johnson | Director | 2 Oct 2000 | 30 Jun 2001 | British | 72 years |
| Philip Gordon Scott | Director | 1 Sept 2000 | 1 Jul 2003 | British | 72 years |
| Philip Martin White | Secretary | 19 Oct 1998 | 30 Nov 2004 | British | - |
| Richard Andrew Whitaker | Director | 1 Jul 1998 | 17 Sept 1998 | British | 74 years |
| Robert Graham | Director | 22 Mar 1991 | 19 Oct 1998 | British | 79 years |
| Stephen Andrew Joseph Mann | Director | 29 Apr 2005 | 22 May 2006 | British | 61 years |
| Stephen Anthony Hampson | Director | 24 Sept 2012 | 20 Nov 2018 | British | 53 years |
| Toby Emil Strauss | Director | 11 Feb 2009 | 23 May 2011 | British | 67 years |
| William Henderson Jack | Director | 19 Oct 1998 | 1 Sept 2000 | British | 82 years |