| HARBOUR ENERGY SECRETARIES LIMITED ACTIVE | Secretary | 31 May 2022 | | | | 151, Buckingham Palace Road, London, SW1W 9SZ, England |
| DAVIES, Graeme John ACTIVE | Director | 02 Oct 2026 | | United Kingdom | May 1983 | 151, Buckingham Palace Road, London, SW1W 9SZ, United Kingdom |
| 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 | 09 Nov 2005 | 31 Dec 2008 | | | 14 Willowmead Close, Ealing, London, W5 1PT |
| BATE, Christopher Malcolm RESIGNED | Secretary | 23 Oct 2003 | 09 Nov 2005 | | | Bryn Y Mor, Bangor, Gwynedd, LL57 2HG |
| BRYANT, Shaun Kevin RESIGNED | Secretary | 30 Jun 2000 | 07 Feb 2001 | | | 22 Searle Way, Eight Ash Green, Colchester, Essex, CO6 3QS |
| ELLIS, Philip Arthur RESIGNED | Secretary | 29 Sep 1995 | 30 Jun 2000 | | | 111 Church Road, Hatfield Peverel, Chelmsford, Essex, CM3 2LB |
| MOSS, William Neville RESIGNED | Secretary | 11 Mar 1994 | 29 Sep 1995 | | | 27 Badgers Bank, Belstead Road, Ipswich, Suffolk, IP2 9EN |
| 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 |
| DWS SECRETARIES LIMITED RESIGNED | Nominee Secretary | 07 Feb 2001 | 23 Oct 2003 | | | Five Chancery Lane, Cliffords Inn, London, EC4A 1BU |
| LEDINGHAM CHALMERS LLP RESIGNED | Secretary | 23 Oct 2003 | 09 Nov 2005 | | | Johnstone House, 52-54 Rose Street, Aberdeen, AB10 1UD |
| ALLAN, Robert Andrew RESIGNED | Director | 28 Apr 2016 | 25 Jun 2020 | United Kingdom | December 1959 | 23, Lower Belgrave Street, London, SW1W 0NR, England |
| ANSTEE, Eric Edward RESIGNED | Director | 11 Mar 1994 | 24 Feb 1997 | United Kingdom | January 1951 | Whitethorns, Weydown Road, Haslemere, Surrey, GU27 1DS |
| BARR, Scott RESIGNED | Director | 12 Dec 2024 | 02 Oct 2026 | Scotland | July 1976 | 151, Buckingham Palace Road, London, SW1W 9SZ, England |
| 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 |
| BELL, Andrew Stewart RESIGNED | Director | 09 Feb 2001 | 23 Oct 2003 | United Kingdom | August 1952 | 178 Clonmore Street, London, SW18 5HB |
| BENKE, Eike, Dr RESIGNED | Director | 09 Nov 2005 | 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 |
| DEVANEY, John Francis RESIGNED | Director | 11 Mar 1994 | 02 Dec 1998 | United Kingdom | June 1946 | Kettleshill Farm, Under River, Sevenoaks, Kent, TN15 0RX |
| 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 | 28 Apr 2016 | 16 Dec 2020 | United Kingdom | August 1958 | 23, Lower Belgrave Street, London, SW1W 0NR, England |
| EDGLEY, Steven Neville RESIGNED | Director | 01 Nov 2003 | 09 Nov 2005 | United Kingdom | November 1962 | 83 Loom Lane, Radlett, Hertfordshire, WD7 8NY |
| FERGUSON, Donald RESIGNED | Director | 23 Oct 2003 | 09 Nov 2005 | | December 1959 | 6 Cresswell Gardens, Kensington, London, SW5 0BJ |
| 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 |
| GRIFFIN, Dean Geoffrey RESIGNED | Director | 25 Nov 2016 | 21 Jul 2021 | United Kingdom | September 1969 | 23, Lower Belgrave Street, London, SW1W 0NR, United Kingdom |
| GROOM, Malcolm David John RESIGNED | Director | 09 Feb 2001 | 27 Mar 2001 | England | May 1950 | Westlodge, 169 Burwood Road, Walton On Thames, Surrey, KT12 4AT |
| HARRINGTON, Simon Chapman RESIGNED | Director | 11 Sep 2000 | 07 Feb 2001 | | January 1962 | 17 Cages Way, Melton, Woodbridge, Suffolk, IP12 1TE |
| 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 |
| HAWKINS, Warren RESIGNED | Director | 03 Dec 2003 | 09 Nov 2005 | | February 1948 | 4225 Milton, Houston, Harris Texas, 77005, Usa |
| HESS, Jone RESIGNED | Director | 09 Sep 2010 | 31 Jul 2014 | United Kingdom | September 1968 | 7th Floor, 129 Wilton Road, London, SW1V 1JZ, United Kingdom |
| HOGAN, John Anthony RESIGNED | Director | 23 Oct 2003 | 09 Nov 2005 | United Kingdom | April 1953 | The Malthouse Heaverham Road, Kemsing, Sevenoaks, Kent, TN15 6NE |
| 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 |
| HONEYBOURNE, John William Gervase RESIGNED | Director | 23 Oct 2003 | 09 Nov 2005 | Usa | March 1951 | 614 Regentview Drive, Houston, Texas, 77079, U S A |
| HUNTER, Alexander RESIGNED | Director | 23 Oct 2003 | 09 Nov 2005 | | May 1954 | 64 Contlaw Road, Milltimber, Aberdeen, AB13 0EJ |
| HYAMS, Edward Barnard RESIGNED | Director | 15 Feb 2000 | 30 Sep 2000 | England | May 1951 | The Paddock, 70 Lexden Road, Colchester, Essex, CO3 3SP |
| 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 |
| LEGG, Jonathan Victor Lewis RESIGNED | Director | 09 Feb 2001 | 01 Nov 2002 | | February 1953 | Flat 4 136 Sutherland Avenue, London, W9 1HP |
| LERCH, Michael Felix RESIGNED | Director | 20 Jun 2009 | 28 Apr 2016 | United Kingdom | March 1962 | 23, Lower Belgrave Street, London, SW1W 0NR, England |
| MACAULAY, William E. RESIGNED | Director | 25 Nov 2003 | 09 Nov 2005 | United States | September 1945 | 7 Hill Road, Greenwich, 06830 Connecticut, Usa |
| MACDONALD, Jeffrey Saunders RESIGNED | Director | 23 Oct 2003 | 04 Jun 2007 | | February 1956 | 18114 Langsbury Drive, Houston, Texas, 77084, Usa |
| MARIS, Antony Wayne RESIGNED | Director | 06 Nov 2001 | 23 Oct 2003 | England | April 1961 | 16 Brighton Road, Godalming, Surrey, GU7 1NS |
| MARSH, Paul Colin RESIGNED | Director | 30 Sep 1996 | 07 Feb 2001 | | January 1958 | Aldham Old Rectory Whatfield Road, Aldham, Ipswich, Suffolk, IP7 6LJ |
| MURCHISON, John Hardy RESIGNED | Director | 23 Oct 2003 | 09 Nov 2005 | | December 1971 | 6200 Burgoyne Road, Houston, Texas, 77057, Usa |
| O'KANE, Dermot RESIGNED | Director | 15 Feb 2000 | 21 Jul 2000 | | October 1957 | 41 Bredfield Street, Woodbridge, Suffolk, IP12 4NH |
| PRIEN, Nicolo RESIGNED | Director | 09 Nov 2005 | 01 Jul 2009 | | November 1966 | Oberkasseler Strasse 64, Duesseldorf, 40545, Germany |
| PRINGLE, Keith James RESIGNED | Director | 23 Oct 2003 | 09 Nov 2005 | Uk | February 1959 | The Nelmes, Munsley, Ledbury, Herefordshire, HR8 2SH |
| REICHETSEDER, Peter, Prof Dr RESIGNED | Director | 09 Nov 2005 | 31 Aug 2012 | | January 1954 | 7th Floor, 129 Wilton Road, London, SW1V 1JZ, United Kingdom |
| ROSE, Richard Andrew RESIGNED | Director | 28 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 |
| SHACKLETON, Geoffrey RESIGNED | Director | 15 Feb 2000 | 07 Feb 2001 | | April 1947 | Shuttles 2 Greenroyd Court, Darrington, Pontefract, West Yorkshire, WF8 3BG |
| SHAW, Sandra Nan Demby RESIGNED | Director | 06 Nov 2001 | 23 Oct 2003 | England | July 1953 | 21 Harcourt Road, Dorney Reach, Berkshire, SL6 0DT |
| 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 | 09 Nov 2005 | 31 Aug 2012 | | August 1957 | 7th Floor, 129 Wilton Road, London, SW1V 1JZ, United Kingdom |
| SLEAP, Christopher Malcolm RESIGNED | Director | 10 Nov 2000 | 08 May 2001 | | January 1958 | The Lodge, White Street Martham, Norwich, Norfolk, NR29 4PQ |
| STANLEY, Martin Stephen William RESIGNED | Director | 15 Feb 2000 | 07 Feb 2001 | | June 1963 | IP12 |
| SWINDEN, Douglas John RESIGNED | Director | 23 Sep 1994 | 08 Mar 1996 | | July 1945 | Apartment 13 Highwood Manor, 21 Constitution Hill, Ipswich, Suffolk, IP1 3RF |
| TURNER, Trevor David RESIGNED | Director | 23 Sep 1994 | 30 Sep 1996 | | March 1952 | 14 The Paddock, Hitchin, Hertfordshire, SG4 9EF |
| 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 |
| WEBSTER, Steven RESIGNED | Director | 23 Oct 2003 | 09 Nov 2005 | | September 1951 | 1908 River Oaks Blvd., Houston, Harris 77019, United States |
| WHEATON, Stuart Royston RESIGNED | Director | 25 Nov 2016 | 01 Jul 2018 | United Kingdom | September 1966 | 23, Lower Belgrave Street, London, SW1W 0NR, United Kingdom |
| WHELAN, James RESIGNED | Director | 16 Sep 1996 | 22 Nov 1999 | | June 1953 | 115 Henley Road, Ipswich, Suffolk, IP1 4NG |
| WILLIAMS, Paul David RESIGNED | Director | 01 Jul 2018 | 02 Jul 2021 | England | March 1963 | 23, Lower Belgrave Street, London, SW1W 0NR, England |
| WILLIS, John Kingsley RESIGNED | Director | 07 Feb 2001 | 23 Oct 2003 | | August 1951 | 32 Mount Hermon Road, Woking, Surrey, GU22 7UN |