UK Oil & Gas PLC is a UK-based energy developer primarily engaged in delivering salt cavern hydrogen storage projects in the United Kingdom. The company focuses on underground hydrogen storage sites in South Dorset and East Yorkshire, leveraging salt cavern technology, which is proven, safe, and cost-effective, to create large-scale energy storage solutions with maximum annual capacities envisioned at 30 TWh for the Dorset site and initially 7 TWh for East Yorkshire, with plans for expansion. UKOG's subsidiary, UK Energy Storage (UKEn), is central to these efforts, progressing a £1 billion integrated energy hub initiative centered on hydrogen-ready gas storage and future green hydrogen generation capabilities, including exploring green hydrogen production via electrolysis powered by proximity to offshore wind farms. The company has transitioned from traditional oil and gas exploration and production focused in the Weald Basin and other UK onshore licenses to advance clean energy storage and hydrogen infrastructure as part of its strategic realignment. Recent major developments include signing a memorandum of understanding with National Gas Transmission PLC to develop a dedicated 100% hydrogen pipeline project known as Project Union and divesting its UKOG GB Ltd subsidiary to focus on hydrogen-related ventures. Founded in 2004 and headquartered in London, UKOG also maintains interests in oil and gas assets but is strategically evolving toward net zero energy solutions by 2050, reflecting a significant shift from its earlier core activities in hydrocarbon exploration.