Union Jack Oil plc is a UK-registered oil and gas company focused on the exploration and development of hydrocarbon projects in the United Kingdom and the United States. The company operates through joint operating agreements with partners and is involved in the appraisal and future development of its licensed interests, which include fields such as Wressle, West Newton, and Keddington in the UK, as well as the Moccasin and Andrews Field in the USA. Union Jack Oil generates revenue primarily from production activities and aims to build a sustainable onshore hydrocarbon exploration and production business.