| HARBOUR ENERGY SECRETARIES LIMITED ACTIVE | Secretary | 31 May 2022 | | | | 151, Buckingham Palace Road, London, SW1W 9SZ, England |
| BARR, Scott ACTIVE | Director | 12 Dec 2024 | | Scotland | July 1976 | 151, Buckingham Palace Road, London, SW1W 9SZ, England |
| LANDES, Howard Ralph ACTIVE | Director | 15 Apr 2021 | | United Kingdom | December 1975 | 151, Buckingham Palace Road, London, SW1W 9SZ, England |
| SCOTT, Russell ACTIVE | Director | 12 Dec 2024 | | Scotland | September 1973 | 151, Buckingham Palace Road, London, SW1W 9SZ, England |
| ASHMORE, Richard John RESIGNED | Secretary | 05 Sep 2001 | 31 Dec 2008 | | | 14 Willowmead Close, Ealing, London, W5 1PT |
| CHATTERWAY, Dennis Alan RESIGNED | Nominee Secretary | 02 Nov 1992 | 02 Nov 1993 | | | 14 Warren Close, Elmswell, Bury St Edmunds, Suffolk, IP30 9DS |
| RICKARD, Rachel Abigail RESIGNED | Secretary | 29 Apr 2016 | 18 Jan 2017 | | | 23 Lower Belgrave Street, Lower Belgrave Street, London, SW1W 0NR, England |
| ROSE, Daniel Alexander RESIGNED | Secretary | 01 Nov 2018 | 31 May 2022 | | | 23, Lower Belgrave Street, London, SW1W 0NR, England |
| VICKERS, Julie Alison RESIGNED | Secretary | 18 Jan 2017 | 01 Nov 2018 | | | 23, Lower Belgrave Street, London, SW1W 0NR, United Kingdom |
| HACKWOOD SECRETARIES LIMITED RESIGNED | Nominee Secretary | | 21 Aug 2001 | | | One Silk Street, London, EC2Y 8HQ |
| ALLAN, Robert Andrew RESIGNED | Director | 27 Apr 2016 | 25 Jun 2020 | United Kingdom | December 1959 | 23, Lower Belgrave Street, London, SW1W 0NR, England |
| ARNTZ, Klaus, Dr RESIGNED | Director | 18 Dec 1992 | 31 Mar 1995 | | November 1931 | 19 Fuchsgaude, Mhelheimiruha D4330, Germany |
| BATE, David Karl RESIGNED | Director | 01 Oct 2013 | 04 Feb 2016 | United Kingdom | March 1969 | 7th Floor, 129 Wilton Road, London, SW1V 1JZ, United Kingdom |
| BENKE, Eike, Dr RESIGNED | Director | 18 Dec 1992 | 01 Jan 2008 | | June 1943 | Kantorie 89 D-45134, Essen, FOREIGN, Germany |
| BOOTH, Melanie Jayne RESIGNED | Director | 18 Sep 2012 | 04 Feb 2016 | United Kingdom | April 1967 | 7th Floor, 129 Wilton Road, London, SW1V 1JZ, United Kingdom |
| BUSS, Judith RESIGNED | Director | 01 Jan 2008 | 31 Aug 2012 | | July 1968 | 7th Floor, 129 Wilton Road, London, SW1V 1JZ, United Kingdom |
| COLE, Martin RESIGNED | Director | 17 Jan 2008 | 19 Jun 2009 | | June 1949 | 15 Cuddington Park Close, Banstead, Surrey, SM7 1RF |
| DEVENPORT, Simon RESIGNED | Director | 18 Jul 2013 | 04 Feb 2016 | United Kingdom | June 1959 | 7th Floor, 129 Wilton Road, London, SW1V 1JZ, United Kingdom |
| DURRANT, Anthony Richard Charles RESIGNED | Director | 27 Apr 2016 | 13 Dec 2020 | United Kingdom | August 1958 | 23, Lower Belgrave Street, London, SW1W 0NR, England |
| FORSYTH, Julie Elizabeth RESIGNED | Director | 25 Nov 2016 | 14 Feb 2020 | Scotland | March 1969 | 23, Lower Belgrave Street, London, SW1W 0NR, United Kingdom |
| GIBB, Andrew George RESIGNED | Director | 25 Nov 2016 | 15 Apr 2021 | United Kingdom | October 1968 | 23, Lower Belgrave Street, London, SW1W 0NR, United Kingdom |
| GILES, Stephen Daniel RESIGNED | Director | 20 Sep 2000 | 08 Mar 2006 | | April 1949 | Baynards Manor House, Baynards, Rudgwick, West Sussex, RH12 3AD |
| GRIFFIN, Dean Geoffrey RESIGNED | Director | 25 Nov 2016 | 21 Jul 2021 | United Kingdom | September 1969 | 23, Lower Belgrave Street, London, SW1W 0NR, United Kingdom |
| HAUPT, Jörn Carsten RESIGNED | Director | 09 Sep 2010 | 15 Mar 2013 | United Kingdom | August 1967 | 7th Floor, 129 Wilton Road, London, SW1V 1JZ, United Kingdom |
| HESS, Jone RESIGNED | Director | 09 Sep 2010 | 31 Jul 2014 | United Kingdom | September 1968 | 7th Floor, 129 Wilton Road, London, SW1V 1JZ, United Kingdom |
| HOHMANN, Bernd RESIGNED | Director | 04 May 1995 | 23 Mar 2006 | | November 1952 | 73 Oppspring, Mulheim, D-45470, Germany |
| HOLLMANN, Gregor Ernst RESIGNED | Director | 09 Sep 2010 | 01 Sep 2013 | United Kingdom | February 1965 | 7th Floor, 129 Wilton Road, London, SW1V 1JZ, United Kingdom |
| KIRK, Philip Andrew RESIGNED | Director | 31 Mar 2021 | 28 Feb 2022 | England | May 1966 | 23, Lower Belgrave Street, London, SW1W 0NR, England |
| KRANE, Alexander Lorentzen RESIGNED | Director | 15 Apr 2021 | 12 Dec 2024 | Norway | March 1976 | 151, Buckingham Palace Road, London, SW1W 9SZ, England |
| LERCH, Michael Felix RESIGNED | Director | 20 Jun 2009 | 27 Apr 2016 | United Kingdom | March 1962 | 23, Lower Belgrave Street, London, SW1W 0NR, England |
| MACDONALD, Jeffrey Saunders RESIGNED | Director | 23 Mar 2006 | 04 Jun 2007 | | February 1956 | 18114 Langsbury Drive, Houston, Texas, 77084, Usa |
| NEUMANN, Uwe, Dr RESIGNED | Director | 28 Jan 1993 | 30 Sep 2003 | | August 1938 | Brandenberg 81, Muelheim, D-45478, Germany |
| PRIEN, Nicolo RESIGNED | Director | 23 Mar 2006 | 01 Jul 2009 | | November 1966 | Oberkasseler Strasse 64, Duesseldorf, 40545, Germany |
| REICHETSEDER, Peter, Prof Dr RESIGNED | Director | 01 Oct 2003 | 31 Aug 2012 | | January 1954 | 7th Floor, 129 Wilton Road, London, SW1V 1JZ, United Kingdom |
| RIECHEL, Michael RESIGNED | Director | 05 Jul 2000 | 23 Mar 2006 | | May 1961 | Hirschstrasse 8, D-46535 Dinslaken, Germany |
| ROSE, Richard Andrew RESIGNED | Director | 27 Apr 2016 | 15 Apr 2021 | England | November 1972 | 23, Lower Belgrave Street, London, SW1W 0NR, England |
| ROTHERMUND, Heinz Charles RESIGNED | Director | 04 Jun 2007 | 31 Dec 2011 | | October 1943 | 7th Floor, 129 Wilton Road, London, SW1V 1JZ, United Kingdom |
| SIM, Alison Jane RESIGNED | Director | 18 Sep 2012 | 04 Feb 2016 | United Kingdom | April 1953 | 7th Floor, 129 Wilton Road, London, SW1V 1JZ, United Kingdom |
| SIVERTSEN, Frank Allan RESIGNED | Director | 08 Mar 2006 | 31 Aug 2012 | | August 1957 | 7th Floor, 129 Wilton Road, London, SW1V 1JZ, United Kingdom |
| SPONHEUER, Theodor RESIGNED | Director | 14 Dec 1994 | 30 Jun 2000 | | May 1937 | Hofringstrasse 44, Essen, D-45138 Germany, FOREIGN |
| STEINMANN, Klaus, Vice President Ruhrgas RESIGNED | Director | 18 Dec 1992 | 23 Feb 2000 | | June 1939 | Kantorie 121, Essen, Nrw 4300, Germany |
| VAN DER LEE, Willem Marie RESIGNED | Director | 04 May 1995 | 23 Mar 2006 | England | January 1933 | 12 Berkeley Court, Marylebone Road, London, NW1 5NA |
| WEBSTER, Gareth Peter RESIGNED | Director | 14 Feb 2020 | 02 Jul 2021 | United Kingdom | June 1980 | 23, Lower Belgrave Street, London, England And Wales, SW1W 0NR, United Kingdom |
| WHEATON, Stuart Royston RESIGNED | Director | 25 Nov 2016 | 01 Jul 2018 | United Kingdom | September 1966 | 23, Lower Belgrave Street, London, SW1W 0NR, United Kingdom |
| WILLIAMS, Paul David RESIGNED | Director | 01 Jul 2018 | 02 Jul 2021 | England | March 1963 | 23, Lower Belgrave Street, London, SW1W 0NR, England |
| HACKWOOD SERVICE COMPANY RESIGNED | Nominee Director | 02 Nov 1992 | 18 Dec 1992 | | | Barrington House 56-67 Gresham Street, London, EC2V 7BB |