| Adrian Colin Farnell | Director | 18 Sept 2003 | 31 Jul 2008 | British | 64 years |
| Alan Piers Johnson | Director | 11 May 2015 | 31 Jul 2017 | British | 57 years |
| Alan Sinclair Devine | Director | 19 Jul 2007 | 31 Jul 2008 | British | 65 years |
| Andrew Paul Gadsby | Director | 1 Apr 2014 | 15 May 2015 | British | 59 years |
| Carolyn Jean Down | Secretary | 16 Nov 2005 | 31 Oct 2012 | Other | - |
| Curt Fred Glenn | Director | 21 Jul 2000 | 18 Sept 2003 | American | 71 years |
| David Gerald Harris | Director | 31 Jul 2017 | 1 Nov 2019 | British | 56 years |
| Derek John Lewis | Secretary | 27 Jun 2000 | 18 Sept 2003 | British | - |
| Domhnal Slattery | Director | 28 Apr 2004 | 19 Jul 2004 | Irish | 58 years |
| Dws Directors Limited | Corporate Nominee Director | 3 May 2000 | 27 Jun 2000 | - | - |
| Dws Secretaries Limited | Corporate Nominee Secretary | 3 May 2000 | 27 Jun 2000 | - | - |
| Emma-marie Mayes | Director | 31 Jul 2017 | 6 Mar 2018 | British | 46 years |
| Graham Colin Clemett | Director | 18 Sept 2003 | 28 Apr 2004 | British | 65 years |
| Ian Maxwell Shephard | Director | 20 Aug 2008 | 10 Feb 2009 | British | 57 years |
| James Frederic Earl | Director | 21 Jul 2000 | 18 Sept 2003 | American | 68 years |
| Jeffrey Johnson | Director | 27 Jun 2000 | 12 Mar 2003 | British | 80 years |
| John Hamer Wood | Director | 8 Aug 2016 | 30 Jun 2017 | British | 63 years |
| Julian Edwin Rogers | Director | 16 Mar 2009 | 1 Apr 2014 | British | 55 years |
| Lynne Conner | Director | 18 Nov 2019 | 5 Mar 2021 | British | 46 years |
| Marina Louise Thomas | Secretary | 18 Sept 2003 | 18 Nov 2005 | British | - |
| Neil Jason Mcdaid | Director | 30 Dec 2016 | 31 Jul 2017 | British | 56 years |
| Nigel Pearce | Director | 18 Sept 2003 | 28 Apr 2004 | British | 74 years |
| Nigel Timothy John Clibbens | Director | 1 Apr 2014 | 27 Feb 2015 | British | 66 years |
| Paul Denzil John Sullivan | Director | 31 Jul 2008 | 30 Dec 2013 | British | 59 years |
| Philip Anthony Tubb | Director | 19 May 2004 | 15 Aug 2008 | British | 59 years |
| Roy Francis Warren | Director | 31 Jul 2008 | 1 Apr 2014 | British | 69 years |
| Sharon Jill Caterer | Director | 28 Apr 2004 | 31 Aug 2017 | British | 63 years |
| Steven James Roulston | Director | 21 Sept 2017 | 18 Nov 2019 | British | 48 years |
| Thomas Craig Nord | Director | 21 Jul 2000 | 31 Mar 2003 | American | 85 years |
| Trevor Douglas Crome | Director | 1 Apr 2014 | 28 Jun 2016 | British | 65 years |
| Trevor Vaughan Castledine | Director | 18 Jun 2004 | 19 Jul 2007 | British | 56 years |
| William Vaughan Latter | Director | 18 Sept 2003 | 7 Jun 2004 | British | 68 years |