| Andrew Mark Turk | Director | 20 Sept 1996 | 9 Dec 1998 | British | 67 years |
| Andrew Martin Pollins | Director | 1 Jul 2020 | 12 Nov 2021 | British | 59 years |
| Andrew Stephen James Ramsay | Director | 17 Mar 2008 | 3 Feb 2011 | British | 65 years |
| Andrew Stephen James Ramsay | Secretary | 9 Feb 2005 | 3 Feb 2011 | British | - |
| Colin Roger Scoins | Director | 3 Mar 2004 | 9 Feb 2005 | British | 71 years |
| David George Alcock | Director | 1 Oct 2018 | 31 Jan 2022 | British | 61 years |
| David Redfearn | Director | 9 Dec 1998 | 20 Dec 2002 | British | 82 years |
| Donald George Bacon | Director | 8 May 2002 | 16 Jan 2004 | Canadian | 89 years |
| E.on Uk Secretaries Limited | Corporate Secretary | 23 Feb 2004 | 9 Feb 2005 | United Kingdom | - |
| Elaine Hackett | Nominee Director | 27 Dec 1995 | 1 Feb 1996 | British | 63 years |
| Elaine Hackett | Nominee Secretary | 27 Dec 1995 | 1 Feb 1996 | British | - |
| Georgina Seeley | Director | 9 Feb 2005 | 31 Mar 2017 | British | 53 years |
| Hugh Campbell Hamilton | Director | 1 Dec 1996 | 1 Dec 1996 | British | 77 years |
| Hugh Campbell Hamilton | Director | 1 Dec 1996 | 9 Dec 1998 | British | 77 years |
| Hugh Campbell Hamilton | Secretary | 1 Feb 1996 | 9 Dec 1998 | British | - |
| Ian Elcock | Secretary | 1 Jan 2002 | 31 Mar 2004 | British | - |
| Jacqueline Fisher | Nominee Director | 27 Dec 1995 | 1 Feb 1996 | British | 74 years |
| Jaideep Singh Sandhu | Director | 31 Mar 2017 | 30 Sept 2018 | Indian | 60 years |
| Jasbir Bains | Director | 23 Sept 1996 | 1 Dec 1996 | British | 60 years |
| John Bryant | Director | 1 Feb 1996 | 9 Dec 1998 | British | 80 years |
| Kevin Adrian Dibble | Director | 23 Nov 2021 | 31 Mar 2024 | British | 58 years |
| Michael Alan Hughes | Director | 1 Dec 1996 | 8 May 2002 | British | 81 years |
| Michael Roy Miller | Director | 9 Dec 1998 | 23 Feb 2004 | British | 73 years |
| Paul Arthur Wright | Director | 4 Jan 2001 | 31 Mar 2004 | British | 69 years |
| Penelope Louise Small | Director | 9 Feb 2005 | 31 Mar 2017 | British | 60 years |
| Peter David Ash | Director | 2 Aug 2013 | 31 Mar 2017 | British | 62 years |
| Philip Jonathan Taylor | Director | 1 Dec 1996 | 9 Dec 1998 | British | 68 years |
| Robert Harvey Browne | Director | 9 Dec 1998 | 31 Dec 2001 | British | 85 years |
| Robert Harvey Browne | Secretary | 9 Dec 1998 | 31 Dec 2001 | British | - |
| Robert John Wells | Director | 6 Apr 2022 | 12 Jul 2024 | British | 46 years |
| Roger Derek Simpson | Secretary | 3 Feb 2011 | 31 May 2017 | - | - |
| Sarah Frances Fleure Mingham | Director | 31 Mar 2017 | 10 May 2019 | British | 49 years |
| Sarah Jane Gregory | Director | 7 Jun 2019 | 31 Aug 2019 | British | 61 years |
| Sarah Jane Gregory | Secretary | 1 Jun 2017 | 23 Jul 2021 | - | - |
| Simon David Pinnell | Director | 31 Mar 2017 | 31 Jul 2020 | British | 62 years |
| Stephen Anthony King | Director | 9 Dec 1998 | 31 Jan 2003 | British | 66 years |
| Sudhir Bhudev Prasad Bhatt | Director | 23 Feb 2004 | 9 Feb 2005 | British | 65 years |