| Adam Paul Rutherford | Secretary | 21 Oct 1998 | 14 Jan 2000 | British | - |
| Alan Ronald Cook | Director | 31 Oct 2001 | 28 Jun 2002 | British | 72 years |
| Brian Willian Hurd | Director | 30 Jul 2004 | 2 Nov 2006 | United Kingdom | 63 years |
| Bruce Keir Rigby | Director | 2 Apr 2020 | 14 Feb 2024 | British | 71 years |
| David Antony Evans | Director | 19 Nov 2009 | 24 Apr 2015 | British | 55 years |
| David Charles Higgins | Director | 22 Apr 2010 | 8 Oct 2015 | British | 71 years |
| Deborah Louise Webb | Director | 1 Apr 2012 | 10 Nov 2014 | British | 61 years |
| Edward Greenhalgh Louis Bridge | Director | 12 Mar 2015 | 22 Sept 2017 | British | 47 years |
| Finbar Anthony O'dwyer | Director | 22 Apr 2010 | 1 Apr 2012 | Irish | 54 years |
| Frank Schinella | Director | 21 Oct 1998 | 18 Sept 2001 | Australian | 64 years |
| Gregory Mark Wood | Director | 31 Oct 2001 | 29 Jul 2003 | British | 72 years |
| Hilary Anne Lowe | Secretary | 14 Jan 2000 | 3 Mar 2000 | British | - |
| Istvan Antal Haasz | Director | 11 Jun 2008 | 15 Jan 2010 | British | 61 years |
| James White Jack | Director | 29 Jul 2003 | 30 Jul 2004 | British | 74 years |
| Jennifer Anne Owens | Director | 22 Sept 2017 | 22 Nov 2022 | British | 55 years |
| Joan Mary Wood | Director | 21 Oct 1998 | 30 Dec 2001 | British | 73 years |
| Kelvin Nunn | Director | 1 Jun 2006 | 1 Apr 2012 | British | 68 years |
| Lawrence Churchill | Director | 1 Feb 2015 | 28 Apr 2020 | British | 79 years |
| Lesley Jane Alexander | Director | 12 Mar 2015 | 2 Apr 2020 | British | 64 years |
| Michael Alan Payne | Director | 28 Sept 2015 | 2 Apr 2020 | British | 54 years |
| Neil Anthony Berkett | Director | 1 Jul 2002 | 20 Jun 2003 | New Zealander | 70 years |
| Neil Rodgers | Director | 21 Oct 1998 | 21 Feb 2002 | British | 68 years |
| Paul James Barlow | Director | 1 Apr 2012 | 15 Jul 2016 | British | 81 years |
| Prudential Group Secretarial Services Limited | Corporate Secretary | 31 Oct 2001 | 4 Oct 2019 | United Kingdom | - |
| Richard Charles Everett | Director | 29 Jul 2003 | 19 May 2006 | British | 60 years |
| Rodney Pennington Baker-bates | Director | 29 Oct 1998 | 31 Oct 2001 | British | 81 years |
| Steve Ferrari | Director | 29 Jan 2007 | 23 Jun 2008 | British | 60 years |
| Susan Diane Morgan | Secretary | 20 Jun 2001 | 31 Oct 2001 | British | - |
| Susan Doreen Windridge | Secretary | 3 Mar 2000 | 20 Jun 2001 | British | - |
| Tulsi Ratakonda Naidu | Director | 19 Jun 2008 | 20 Jul 2010 | Indian | 52 years |