| Alan Henry Haywood | Director | 1 Nov 2014 | 14 Feb 2017 | British | 60 years |
| Alison Jane Hollow | Secretary | 1 Apr 1994 | 13 Jun 1994 | British | - |
| Andrea Margaret Thomas | Secretary | 1 Sept 1997 | 26 Feb 2010 | Other | - |
| Anthony Bryan Hayward | Director | 1 Sept 2000 | 1 Nov 2002 | British | 69 years |
| Anthony Bryan Hayward | Director | 4 May 2007 | 30 Nov 2010 | British | 69 years |
| Brian Gilvary | Director | 1 Jan 2012 | 30 Jun 2020 | British | 64 years |
| Brian Peevor | Secretary | 1 Apr 1994 | 13 Jun 1994 | British | - |
| Brian Peevor | Secretary | 23 May 1997 | 31 Aug 1997 | British | - |
| Byron Elmer Grote | Director | 10 Aug 1992 | 31 Dec 1993 | British And Us Citizen | 78 years |
| Byron Elmer Grote | Director | 21 Nov 2002 | 1 Jan 2012 | British And Us Citiz | 78 years |
| Catherine Ann Mccann | Director | 1 Feb 2022 | 31 Jul 2023 | British | 60 years |
| Christopher Kuangcheng Gerald Eng | Secretary | 23 Mar 2009 | 30 Jun 2010 | - | - |
| David Christopher Allen | Director | 1 Jul 1996 | 30 Jun 1997 | British | 72 years |
| David Geoffrey Philip Eyton | Director | 1 Jul 2020 | 16 Mar 2022 | British | 65 years |
| David James Bucknall | Director | 1 Jan 2012 | 17 Aug 2021 | British | 58 years |
| David Robert Watson | Director | 1 Oct 1996 | 1 Sept 2000 | British | 74 years |
| David Simon | Director | 13 Jun 1992 | 13 Jun 1995 | British | 87 years |
| David Stephen Fitzsimmons | Director | 1 Jul 1997 | 30 Dec 1998 | British | 71 years |
| Debasish Satya Sanyal | Director | 1 Aug 2007 | 1 Jan 2012 | British | 61 years |
| Douglas Patrick Chapman | Director | 20 Jul 1992 | 31 Mar 1994 | British | 76 years |
| Douglas Patrick Chapman | Director | 1 Nov 2002 | 31 Jul 2007 | British | 76 years |
| Edmund John Phillip Browne | Director | 10 Jun 1995 | 1 May 2007 | British | 78 years |
| Francis William Michael Starkie | Director | 1 Apr 1994 | 30 Sept 2009 | British | 77 years |
| Gary Christian Greve | Director | 1 Jan 1994 | 31 Aug 1995 | Us Citizen | 77 years |
| Gillian Elizabeth Young | Secretary | 1 Apr 1994 | 13 Jun 1994 | British | - |
| Helen Mccabe | Director | 17 Aug 2021 | 1 Jun 2023 | British | 57 years |
| John Gordon Sinclair Buchanan | Director | 1 Sept 1995 | 21 Nov 2002 | British | 83 years |
| John Harold Bartlett | Director | 27 Feb 2012 | 31 Dec 2017 | British | 73 years |
| Judith Christine Hanratty | Secretary | 1 Oct 1994 | 9 Feb 1995 | British | - |
| Julian John Watts | Secretary | 9 Feb 1995 | 23 May 1997 | New Zealand | - |
| Katherine Anne Thomson | Director | 14 Feb 2017 | 3 Dec 2023 | British | 58 years |
| Leigh-ann Russell | Director | 14 Apr 2022 | 16 May 2022 | British | 51 years |
| Mark Traill Bentley | Director | 13 Jun 1992 | 17 Jul 1992 | British | 91 years |
| Melrose Oil Trading Company Limited | Corporate Director | 11 Aug 2004 | 10 Sept 2004 | United Kingdom | - |
| Michael John O'sullivan | Director | 26 Feb 2018 | 7 May 2021 | British | 62 years |
| Niamh Marie Staunton | Director | 31 Mar 2021 | 26 Apr 2024 | Irish | 48 years |
| Paul Ronald Vaight | Director | 13 Jun 1992 | 30 Jun 1996 | British | 82 years |
| Richard Charles Grayson | Secretary | 13 Jun 1992 | 1 Oct 1994 | British | - |
| Richard Murray Preston | Director | 1 Jul 2004 | 23 Nov 2004 | British | 82 years |
| Roger Christopher Harrington | Director | 1 Oct 2009 | 3 Aug 2018 | British | 60 years |
| Stephen James Ahearne | Director | 13 Jun 1992 | 30 Sept 1996 | British | 87 years |
| Steven Wellesley Percy | Director | 13 Jun 1992 | 30 Jun 1992 | United States | 80 years |
| Yasin Stanley Ali | Secretary | 19 Feb 2001 | 30 Jun 2010 | - | - |
| Zackary Scott Starbird | Director | 31 Jul 2023 | 12 Jul 2024 | American | 56 years |