| Adam David Christopher Westley | Director | 20 Sept 2018 | 2 Sept 2019 | British | 57 years |
| Alan Bennett | Director | 14 Nov 2002 | 3 Nov 2003 | British | 74 years |
| Alan William Mcculloch | Director | 2 Sept 2019 | 30 Jul 2021 | British | 60 years |
| Alistair George Sinclair Geddes | Director | 28 Nov 2001 | 10 Jul 2002 | British | 64 years |
| Andrew William Hodges | Director | 30 Jun 2016 | 12 Jul 2018 | British | 59 years |
| Bruce Douglas Walker | Director | 3 Nov 2003 | 31 Jul 2008 | British | 73 years |
| Centrica Secretaries Limited | Corporate Secretary | 14 Nov 2002 | 1 Dec 2003 | United Kingdom | - |
| David Naughton Keane | Director | 21 Mar 2002 | 18 Oct 2002 | British | 75 years |
| David R Roth | Director | 28 Nov 2001 | 8 Jul 2002 | American | 61 years |
| Garry Stephen Stoker | Director | 14 Nov 2002 | 27 Sept 2004 | British | 59 years |
| Gary Thomas Cardone | Director | 17 Jul 2000 | 21 Mar 2002 | American | 68 years |
| Glenn Edwin Sibbick | Director | 27 Sept 2004 | 19 Jul 2010 | British | 73 years |
| Graeme Stuart Collinson | Director | 21 Jul 2008 | 18 Dec 2012 | British | 70 years |
| Helen Elizabeth Barker | Secretary | 16 Aug 2007 | 31 Mar 2008 | British | - |
| Howard Thomas | Nominee Secretary | 17 Jul 2000 | 17 Jul 2000 | British | - |
| J Kevin Blodgett | Secretary | 26 Jun 2002 | 14 Nov 2002 | British | - |
| John Matthew Boardman | Director | 21 Mar 2002 | 26 Sept 2002 | American | 55 years |
| John Richard Oliver | Director | 21 Mar 2002 | 14 Nov 2002 | British | 66 years |
| Julia Hui Ching Foo | Secretary | 31 Mar 2008 | 25 Sept 2009 | British | - |
| Julia Hui Ching Foo | Secretary | 4 Jan 2010 | 29 Feb 2012 | British | - |
| Justine Michelle Campbell | Director | 12 Jul 2018 | 20 Sept 2018 | British | 56 years |
| Lisa Quick Metts | Secretary | 26 Jan 2001 | 26 Jun 2002 | American | - |
| Martin Robert Scargill | Director | 30 Jul 2021 | 14 Sept 2023 | British | 50 years |
| Martin Ross Chamberlin | Director | 26 Jan 2001 | 28 Nov 2001 | Usa | 66 years |
| Matthew Giles Scrimshaw | Director | 10 Jul 2002 | 14 Nov 2002 | British | 61 years |
| Matthew Sebastian Lodge | Secretary | 25 Sept 2009 | 4 Jan 2010 | British | - |
| Michael Edwin Flinn | Director | 21 Mar 2002 | 14 Nov 2002 | American | 67 years |
| Michael John Garstang | Director | 3 Nov 2003 | 27 Jun 2008 | British | 78 years |
| Nicola Carroll | Director | 18 Dec 2012 | 30 Jun 2016 | British | 67 years |
| Nigel John Wakefield | Director | 28 Nov 2001 | 14 Nov 2002 | British | 60 years |
| Nils Cohrs | Director | 19 Jul 2010 | 18 Dec 2012 | Dutch | 66 years |
| Philip William Davies | Secretary | 1 Dec 2003 | 16 Aug 2007 | British | - |
| Robert Dupre Doty Jr | Director | 28 Nov 2001 | 29 Jul 2002 | American | 69 years |
| Simon Marc Wills | Director | 31 Jul 2008 | 18 Dec 2012 | British | 59 years |
| Vince Mccallion | Director | 17 Jul 2000 | 26 Jan 2001 | British | 64 years |
| Vince Mccallion | Secretary | 17 Jul 2000 | 26 Jan 2001 | British | - |
| William Andrew Joseph Tester | Nominee Director | 17 Jul 2000 | 17 Jul 2000 | British | 64 years |
| Yehuda Cohen | Director | 26 Jan 2001 | 28 Nov 2001 | British | 62 years |
| Yehuda Cohen | Director | 10 Jul 2002 | 14 Nov 2002 | British | 62 years |