| Adam Charles Little | Director | 26 Jul 2004 | 31 Dec 2004 | British | 75 years |
| Alan Henry Haywood | Director | 1 Nov 2014 | 1 Jan 2017 | British | 60 years |
| Andrea Margaret Thomas | Secretary | 1 Sept 1997 | 26 Feb 2010 | Other | - |
| Brian Gilvary | Director | 1 Jan 2012 | 8 Jul 2019 | British | 64 years |
| Brian Peevor | Secretary | 1 Apr 1994 | 31 Aug 1997 | British | - |
| Byron Elmer Grote | Director | 21 Nov 2002 | 1 Jan 2012 | British And Us Citiz | 78 years |
| Christopher Kuangcheng Gerald Eng | Secretary | 23 Mar 2009 | 30 Jun 2010 | - | - |
| Christopher Philip King | Director | 16 Apr 1992 | 31 Oct 1994 | British | 90 years |
| Christopher Shaw Gibson Smith | Director | 1 Sept 1992 | 31 Aug 1997 | British | 81 years |
| David James Bucknall | Director | 1 Jan 2012 | 1 Nov 2014 | British | 58 years |
| David James Bucknall | Director | 26 Feb 2018 | 17 Aug 2021 | British | 58 years |
| David Simon | Director | 16 Apr 1992 | 24 Jul 1992 | British | 87 years |
| David William Parry | Director | 16 Apr 1992 | 31 Mar 1993 | British | 87 years |
| Debasish Satya Sanyal | Director | 1 Aug 2007 | 1 Jan 2012 | British | 61 years |
| Douglas Patrick Chapman | Director | 1 Apr 1994 | 31 Jul 2007 | British | 76 years |
| Francis William Michael Starkie | Director | 1 Dec 2002 | 30 Sept 2009 | British | 77 years |
| Helen Mccabe | Director | 17 Aug 2021 | 1 Jun 2023 | British | 57 years |
| Jean Baptiste Michel Renard | Director | 1 Feb 2003 | 23 Mar 2010 | French | 65 years |
| John Gordon Sinclair Buchanan | Director | 1 Oct 1996 | 21 Nov 2002 | British | 83 years |
| John Harold Bartlett | Director | 27 Feb 2012 | 31 Dec 2017 | British | 73 years |
| Julian John Watts | Director | 21 Dec 1994 | 23 May 1997 | New Zealand | 87 years |
| Katherine Anne Thomson | Director | 1 Jan 2017 | 17 Aug 2021 | British | 58 years |
| Mark Louis Noetzel | Director | 1 Jun 2002 | 1 Feb 2003 | American | 69 years |
| Melrose Oil Trading Company Limited | Corporate Director | 13 Aug 2004 | 31 Aug 2004 | United Kingdom | - |
| Melrose Oil Trading Company Limited | Corporate Director | 13 Aug 2002 | 1 Sept 2002 | United Kingdom | - |
| Michael John O'sullivan | Director | 26 Feb 2018 | 7 May 2021 | British | 62 years |
| Michel Henri Humbert De Fabiani | Director | 1 Sept 1997 | 1 Dec 2000 | French | 81 years |
| Niamh Marie Staunton | Director | 31 Mar 2021 | 26 Feb 2024 | Irish | 48 years |
| Nicholas Mark Hargrave Bamfield | Director | 20 Nov 2009 | 15 Jan 2010 | British | 67 years |
| Peter George Backhouse | Director | 1 Jul 1995 | 4 Feb 1998 | British | 75 years |
| Peter Norman Hobbs | Director | 24 Jul 1992 | 31 Mar 1994 | British | 83 years |
| Richard Charles Grayson | Director | 16 Apr 1992 | 21 Dec 1994 | British | 85 years |
| Richard Charles Grayson | Secretary | 16 Apr 1992 | 31 Mar 1994 | British | - |
| Roger Christopher Harrington | Director | 1 Oct 2009 | 3 Aug 2018 | British | 60 years |
| Rolf Wilhelm Heinrich Stomberg | Director | 24 Jul 1992 | 30 Jun 1995 | German | 86 years |
| Stephen James Ahearne | Director | 16 Apr 1992 | 30 Sept 1996 | British | 87 years |
| Yasin Stanley Ali | Secretary | 19 Feb 2001 | 30 Jun 2010 | - | - |