| HARBOUR ENERGY SECRETARIES LIMITED ACTIVE | Secretary | 31 May 2022 | | | | 151, Buckingham Palace Road, London, SW1W 9SZ, England |
| KAUSCHUS, Andreas ACTIVE | Director | 27 Apr 2026 | | United Kingdom | February 1978 | 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 |
| GARRATT, Heather Diane RESIGNED | Secretary | 12 Jul 2006 | 14 Jul 2010 | | | 23 Lower Belgrave Street, London, SW1W 0NR |
| HUDDLE, Stephen Charles RESIGNED | Secretary | 29 Mar 2006 | 12 Jul 2006 | | | 21 Dunsany Road, London, W14 0JP |
| KAWAN, Heather RESIGNED | Secretary | 12 Sep 2011 | 31 Jan 2014 | | | 23 Lower Belgrave Street, London, SW1W 0NR |
| PARSONS, Lisa Julia RESIGNED | Secretary | 18 Jun 1999 | 29 Mar 2006 | | | Shawfield Cottage, 109 Lansdowne Road, Purley, Surrey, CR8 2PE |
| RICKARD, Rachel Abigail RESIGNED | Secretary | 31 Jan 2014 | 18 Jan 2017 | | | 23 Lower Belgrave Street, London, SW1W 0NR |
| ROSE, Daniel Alexander RESIGNED | Secretary | 01 Nov 2018 | 31 May 2022 | | | 23, Lower Belgrave Street, London, SW1W 0NR, England |
| SHEPHERD, Nicholas Keith RESIGNED | Secretary | 08 Mar 1999 | 18 Jun 1999 | | | 55 Duke Road, London, W4 2BN |
| VICKERS, Julie Alison RESIGNED | Secretary | 18 Jan 2017 | 01 Nov 2018 | | | 23, Lower Belgrave Street, London, SW1W 0NR, United Kingdom |
| VICKERS, Julie RESIGNED | Secretary | 14 Jul 2010 | 12 Sep 2011 | | | 23 Lower Belgrave Street, London, SW1W 0NR |
| TRUSEC LIMITED RESIGNED | Nominee Secretary | 29 Dec 1998 | 08 Mar 1999 | | | 35 Basinghall Street, London, EC2V 5DB |
| ALLAN, Robert Andrew RESIGNED | Director | 23 Jul 2010 | 25 Jun 2020 | United Kingdom | December 1959 | 23 Lower Belgrave Street, London, SW1W 0NR |
| ALLAN, Robert Andrew RESIGNED | Director | 01 Aug 2003 | 16 Jul 2010 | Singapore | December 1959 | 435 Orchard Road, #22-02 Wisma Atria, Singapore, 238877, Singapore |
| DURRANT, Anthony Richard Charles RESIGNED | Director | 30 Jun 2005 | 16 Dec 2020 | United Kingdom | August 1958 | 23, Lower Belgrave Street, London, SW1W 0NR |
| FREEBORN, Edward RESIGNED | Director | 08 Mar 1999 | 24 Mar 1999 | | April 1949 | Little Hickmotts, Summerhill Road, Marden, Tonbridge, Kent, TN12 9DB |
| GIBB, Andrew George RESIGNED | Director | 18 Jan 2017 | 15 Apr 2021 | United Kingdom | October 1968 | 23, Lower Belgrave Street, London, SW1W 0NR, United Kingdom |
| HAWKINGS, Neil RESIGNED | Director | 30 Jun 2005 | 30 Jun 2016 | United Kingdom | March 1961 | 23 Lower Belgrave Street, London, SW1W 0NR |
| HUDDLE, Stephen Charles RESIGNED | Director | 12 Nov 2013 | 29 May 2015 | England | February 1951 | 23 Lower Belgrave Street, London, SW1W 0NR |
| JAMIESON, Charles James Auldjo RESIGNED | Director | 08 Mar 1999 | 30 Jun 2005 | United Kingdom | September 1944 | Dipley Farm, Dipley Common, Hartley Wintney, Hants, RG27 8JS |
| KIRK, Philip Andrew RESIGNED | Director | 15 Apr 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 |
| LIDDELL, Richard RESIGNED | Director | 12 Sep 2000 | 31 Jan 2003 | | November 1947 | 14 Birds Hill Road, Oxshott, Surrey, KT22 0NJ |
| LOCKETT, Simon Charles RESIGNED | Director | 01 Aug 2003 | 15 Aug 2014 | England | September 1964 | 23 Lower Belgrave Street, London, SW1W 0NR |
| LODGE, Andrew Geoffrey RESIGNED | Director | 15 Jun 2009 | 30 Jun 2015 | England | June 1956 | 23, Lower Belgrave Street, London, SW1W 0NR, England |
| RICKARD, Rachel Abigail RESIGNED | Director | 29 May 2015 | 18 Jan 2017 | England | March 1979 | 23 Lower Belgrave Street, London, SW1W 0NR |
| ROSE, Richard Andrew RESIGNED | Director | 01 Oct 2014 | 15 Apr 2021 | England | November 1972 | 23 Lower Belgrave Street, London, SW1W 0NR |
| ROWE, Drusilla Charlotte Jane RESIGNED | Director | 29 Dec 1998 | 10 Feb 1999 | | April 1961 | Flat E, 13 Saint Georges Drive, London, SW1V 4DJ |
| SHELLEY, Eldyne Sarah RESIGNED | Director | 10 Feb 1999 | 08 Mar 1999 | | February 1972 | 6c Kendoa Road, London, SW4 7NB |
| SUTTIE, Laura Anne RESIGNED | Director | 12 Dec 2024 | 27 Apr 2026 | United Kingdom | December 1980 | 151, Buckingham Palace Road, London, SW1W 9SZ, England |
| VAN DER WELLE, John Alexander RESIGNED | Director | 18 Jun 1999 | 30 Jun 2005 | United Kingdom | May 1955 | Northlands 22 Sandpit Lane, St. Albans, Hertfordshire, AL1 4HL |
| WHEATON, Stuart Royston RESIGNED | Director | 09 Nov 2021 | 29 Sep 2023 | United Kingdom | September 1966 | 23, Lower Belgrave Street, London, SW1W 0NR, England |
| WITTMANN, David Andrew RESIGNED | Director | 10 Feb 1999 | 08 Mar 1999 | | August 1964 | 32a Campden Hill Gardens, London, W8 7AZ |
| ZUERCHER, Eleanor Jane RESIGNED | Director | 29 Dec 1998 | 10 Feb 1999 | | August 1963 | 14 St Marys Court, Tingewick, Buckingham, Buckinghamshire, MK18 4RE |