| Alan Bennett | Director | 20 Aug 2004 | 31 Oct 2007 | British | 74 years |
| Centrica Secretaries Limited | Corporate Secretary | 20 Aug 2004 | 31 Aug 2017 | United Kingdom | - |
| Company Directors Limited | Corporate Nominee Director | 10 Nov 1997 | 10 Nov 1997 | United Kingdom | - |
| David Harold Peterson | Director | 23 Oct 2001 | 3 Jun 2002 | American | 85 years |
| Ershel Clarence Redd Jr | Director | 14 May 2003 | 1 Aug 2003 | American | 78 years |
| Gearoid Martin Lane | Director | 20 Aug 2004 | 4 Jul 2007 | Irish | 62 years |
| Gerald Stephen Stapleton | Director | 10 Nov 1997 | 30 Sept 2002 | British | 78 years |
| Graeme Stuart Collinson | Director | 28 Apr 2008 | 1 Jan 2014 | British | 70 years |
| James Martin Milkovich | Director | 12 Nov 2002 | 1 Aug 2003 | American | 75 years |
| James Peter Chiodini | Secretary | 4 Jun 2020 | 23 Feb 2023 | - | - |
| James Spence | Director | 31 Oct 2007 | 30 Jun 2010 | British New Zealand | 58 years |
| Jayne Margaret Hodgson | Secretary | 18 Jan 2004 | 20 Aug 2004 | British | - |
| John Edward Knight | Director | 1 Jan 2014 | 24 Oct 2014 | British | 60 years |
| John Frederick Watson Watts | Director | 28 Apr 2008 | 22 Apr 2014 | British | 72 years |
| John Marcus Nettelton | Secretary | 31 Aug 2017 | 24 May 2020 | - | - |
| Keith Clarke | Director | 10 Nov 1997 | 30 Sept 2002 | British | 66 years |
| Keith Clarke | Director | 1 Aug 2003 | 20 Aug 2004 | British | 66 years |
| Keith Clarke | Secretary | 10 Nov 1997 | 17 Nov 1997 | British | - |
| Marie Katherine Eitrheim | Secretary | 16 Apr 2003 | 1 Aug 2003 | British | - |
| Mark Ramsey Futyan | Director | 22 Apr 2014 | 31 Aug 2017 | British | 48 years |
| Mark Taylor | Director | 4 Oct 2016 | 31 Aug 2017 | British | 56 years |
| Michael John Garstang | Director | 20 Aug 2004 | 28 Apr 2008 | British | 78 years |
| Nicholas Ward Lumley | Director | 8 Oct 2004 | 12 Oct 2004 | British | 66 years |
| Peter Frederick Leopold Koch De Gooreynd | Director | 2 Feb 2015 | 5 Sept 2016 | British | 68 years |
| Reed Smith Corporate Services Limited | Corporate Secretary | 17 Nov 1997 | 16 Apr 2003 | United Kingdom | - |
| Renee Jakubiak Sass | Director | 12 Jul 2002 | 18 Dec 2002 | American | 61 years |
| Richard Charles Kelly | Director | 12 Jul 2002 | 14 May 2003 | American | 80 years |
| Richard Ian Cottee | Director | 21 Sept 2001 | 16 Jul 2002 | Australian | 71 years |
| Richard Matthew Mccord | Director | 15 Nov 2013 | 31 Aug 2017 | British | 53 years |
| Robert James Brown | Director | 16 Sept 1998 | 21 Sept 2001 | British | 86 years |
| Ronald Will | Director | 16 Sept 1998 | 31 Aug 2001 | American | 86 years |
| Sarwjit Sambhi | Director | 28 Apr 2008 | 12 Aug 2013 | British | 57 years |
| Sarwjit Sambhi | Director | 20 Aug 2004 | 28 Apr 2005 | British | 57 years |
| Scott Jeffrey Davido | Director | 13 Feb 2003 | 1 Aug 2003 | Usa | 65 years |
| Simon Marc Wills | Director | 4 Jul 2007 | 28 Apr 2008 | British | 59 years |
| Simon Richard Clark | Director | 20 Aug 2004 | 4 Jul 2007 | British | 62 years |
| Stuart Robert Jackson | Director | 12 Jul 2002 | 12 Nov 2002 | British | 66 years |
| Temple Secretaries Limited | Corporate Nominee Secretary | 10 Nov 1997 | 10 Nov 1997 | - | - |
| Thomas Edward Hinton | Director | 30 Jun 2010 | 15 Nov 2013 | British | 47 years |
| Tony Jarvis | Director | 4 Jul 2007 | 29 Jul 2016 | British | 68 years |
| Vivienne Elaine Chapman | Secretary | 1 Aug 2003 | 13 Jan 2004 | British | - |
| William Mark Hart | Director | 31 Aug 2001 | 19 Jun 2002 | American | 76 years |