| Christopher Stephen Waters | Director | 28 Aug 2009 | 5 Jan 2011 | British | 76 years |
| David John Browne | Director | 1 Jun 1991 | 1 Sept 1998 | British | 81 years |
| Deborah Elizabeth Russell | Director | 3 Aug 1998 | 18 Aug 2000 | British | 72 years |
| Dermot Francis Woolliscroft | Director | 5 Jan 2011 | 25 Nov 2016 | British | 66 years |
| Douglas George Evans | Director | 12 Feb 2002 | 31 Mar 2006 | British | 64 years |
| Exel Nominee No 2 Limited | Corporate Director | 15 Dec 2000 | 1 Sept 2011 | United Kingdom | - |
| Exel Secretarial Services Limited | Corporate Director | 18 Aug 2000 | 1 Feb 2016 | United Kingdom | - |
| Exel Secretarial Services Limited | Corporate Secretary | 12 Dec 2000 | 4 Nov 2015 | United Kingdom | - |
| James Edward Gill | Director | 1 Apr 2017 | 13 Jun 2018 | British | 50 years |
| Jane Li | Director | 1 Feb 2016 | 26 Nov 2018 | British | 57 years |
| Jane Li | Secretary | 4 Nov 2015 | 31 Dec 2018 | - | - |
| Jonathan Culver Bumstead | Director | 27 Feb 2006 | 31 Aug 2009 | British | 61 years |
| Keith Roy Smith | Director | 15 Aug 2014 | 31 Mar 2017 | British | 72 years |
| Kenneth Charles Walls | Director | 1 Jun 1991 | 15 Dec 2000 | British | 86 years |
| Kenneth Charles Walls | Secretary | 1 Jun 1991 | 15 Dec 2000 | British | - |
| Kenneth Wright | Director | 1 Jun 1991 | 31 Mar 1993 | British | 93 years |
| Neil William Warner | Director | 9 Jun 1995 | 20 Dec 1996 | British | 73 years |
| Paul Taylor | Director | 28 Aug 2009 | 15 Aug 2014 | British | 66 years |
| Paul Venables | Director | 18 Feb 1994 | 23 Jun 1994 | British | 65 years |
| Peter John Carter | Director | 24 Jun 1993 | 22 Jan 1995 | British | 77 years |
| Steven Fink | Director | 5 Jan 2011 | 25 Jul 2019 | British | 51 years |
| Stuart Anthony Young | Director | 9 Jun 1995 | 21 Mar 2003 | English | 69 years |