Star Energy Group plc, formerly IGas Energy plc, is the United Kingdom's leading onshore energy producer focused on the exploration, development, processing, and production of oil and natural gas; it also generates electricity through geothermal energy projects. The company holds interests in licenses across key onshore regions including the Weald Basin in southern England, the Gainsborough Trough and East Midlands, the Bowland Basin in the North West of England, and the northern coastal area of the Inner Moray Firth in Scotland, operating from more than 90 sites and producing hydrocarbons such as natural gas and crude oil with average net production around 2,000 barrels of oil equivalent per day. Star Energy processes oil at facilities like the Welton Gathering Centre and Holybourne, handles third-party oil volumes, supports waterflood projects for enhanced recovery such as at Scampton North, and develops deep geothermal heat initiatives including district heating networks and hospital contracts via its GT Energy subsidiary acquired in 2020. Founded in 2004 and headquartered in Lincoln, Lincolnshire, with registered offices at the Welton Gathering Centre, the company changed its name from IGas Energy plc to Star Energy Group plc in June 2023 to reflect its strategic evolution toward low-carbon energy solutions amid the transition to a net-zero economy. Recent developments include geothermal collaborations such as with SSE for Stoke-on-Trent district heat networks, applications to the Green Heat Network Fund, hydrogen project planning submissions, and sales of non-core land assets for £6.3 million to streamline operations.