| Adam Paul Rutherford | Secretary | 22 Dec 1998 | 14 Jan 2000 | British | - |
| Andrew David Briggs | Director | 31 Oct 2001 | 29 Jul 2003 | British | 59 years |
| Brian Willian Hurd | Director | 4 Aug 2004 | 2 Nov 2006 | United Kingdom | 63 years |
| Clare Jane Bousfield | Director | 15 Feb 2018 | 30 Sept 2023 | British | 57 years |
| Daniel John Pender | Director | 13 Feb 2015 | 8 Dec 2015 | British | 50 years |
| David John Belsham | Director | 31 Oct 2001 | 23 Jul 2014 | British | 66 years |
| David Roy Macmillan | Director | 3 Jul 2017 | 12 Jul 2018 | British | 57 years |
| Elizabeth Pamela Burgess | Director | 7 Dec 2005 | 11 Jun 2007 | British | 60 years |
| Elizabeth Pamela Burgess | Director | 20 Jun 2001 | 27 Feb 2002 | British | 60 years |
| Frank Schinella | Director | 5 Nov 1998 | 18 Sept 2001 | Australian | 64 years |
| Gary Paul John Shaughnessy | Director | 15 Aug 2007 | 12 Jun 2008 | British | 59 years |
| Gregory Mark Wood | Director | 31 Oct 2001 | 29 Jul 2003 | British | 72 years |
| Hamayou Akbar Hussain | Director | 14 Jan 2014 | 19 Jul 2016 | British | 53 years |
| Hilary Anne Lowe | Secretary | 14 Jan 2000 | 3 Mar 2000 | British | - |
| Istvan Antal Haasz | Director | 1 May 2008 | 15 Jan 2010 | British | 61 years |
| James White Jack | Director | 29 Jul 2003 | 30 Jul 2004 | British | 74 years |
| Jeremy Spencer Deeks | Director | 30 Aug 2016 | 30 Aug 2016 | British | 55 years |
| Jeremy Spencer Deeks | Director | 21 Oct 2016 | 31 Oct 2017 | British | 55 years |
| Joan Mary Wood | Director | 22 Dec 1998 | 31 Oct 2001 | British | 73 years |
| John Clark Betteridge | Director | 16 Dec 2009 | 31 Dec 2013 | British | 67 years |
| John Kenneth Elbourne | Director | 27 Mar 1997 | 5 Nov 1998 | British | 81 years |
| John Richard Gawthorne | Director | 15 May 1992 | 13 Jul 1993 | British | 75 years |
| John Richard Talbot | Director | 29 Aug 2007 | 12 Jun 2008 | British | 74 years |
| Jonathan Carle Leslie Willcocks | Director | 6 Sept 2007 | 12 Jun 2008 | British | 58 years |
| Keith Alan Lovett | Director | 20 Jun 2001 | 2 Jan 2002 | British | 68 years |
| Keith Gerald Davies | Director | 3 Sept 2019 | 28 Feb 2020 | British | 58 years |
| Keith Leonard Bedell Pearce | Director | 15 May 1992 | 31 Oct 1997 | British | 79 years |
| Kelvin Nunn | Director | 13 May 2008 | 17 Jun 2013 | British | 68 years |
| Marcus Pierre Price | Director | 25 Sept 2007 | 12 Jun 2008 | British | 52 years |
| Maria Luisa Cassoni | Director | 30 Dec 1996 | 6 May 1998 | British | 74 years |
| Mark Alan Thompson | Director | 30 Aug 2007 | 30 Nov 2009 | British | 64 years |
| Michael James Lifford Macnaughtan Hawes | Director | 30 Aug 2016 | 30 Nov 2018 | British | 61 years |
| Michael John Moores | Director | 31 Oct 2001 | 2 Sept 2002 | British | 69 years |
| Neil Rodgers | Director | 5 Nov 1998 | 31 Oct 2001 | British | 68 years |
| Paul David Cooper | Director | 2 Mar 2020 | 6 May 2022 | British | 53 years |
| Paul Spencer | Director | 19 Jul 2016 | 5 Feb 2021 | British | 75 years |
| Peter Nicholas Hanby | Director | 25 Apr 1994 | 30 Dec 1996 | British | 76 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 |
| Robert Walker | Secretary | 15 May 1992 | 22 Dec 1998 | British | - |
| Rodney Pennington Baker-bates | Director | 5 Nov 1998 | 31 Oct 2001 | British | 81 years |
| Stephen Richard Edwards | Director | 30 Dec 1996 | 13 Mar 1998 | British | 70 years |
| Susan Diane Morgan | Secretary | 20 Jun 2001 | 31 Oct 2001 | British | - |
| Susan Doreen Windridge | Secretary | 3 Mar 2000 | 20 Jun 2001 | British | - |
| Timothy James William Tookey | Director | 2 Sept 2002 | 1 Aug 2003 | British | 63 years |
| Trevor Keith Pullen | Director | 12 Jul 1993 | 25 Apr 1994 | British | 77 years |
| Tulsi Ratakonda Naidu | Director | 17 Oct 2014 | 31 May 2016 | Indian | 52 years |