Centrica plc operates as an integrated energy company in the United Kingdom, the Republic of Ireland, Norway, the United States, Canada, and internationally. The company operates through Centrica Consumer, Centrica Business, and Upstream segments. It supplies gas and electricity to residential customers, as well as offers energy-related services; and generates power from combined cycle gas turbines and nuclear assets. The company also provides installation, repair, and maintenance services for domestic central heating and cooling systems and related appliances, as well as offers maintenance/breakdown services. In addition, it is involved in the procurement, trading, and optimization of energy; and supplies energy efficiency solutions and technologies to residential customers. Further, the company produces and processes gas and oil; develops new fields to maintain reserves; constructs, owns, and exploits infrastructure; and engages in the social enterprise investment fund activities. Additionally, it provides vehicle leasing, commercial, and insurance services, as well as energy management products and services; and operates a gas storage, and franchise network. The company also provides liquefied natural gas vessel chartering services. It primarily supplies energy and services to approximately 26.2 million customers under the British Gas, Bord Gáis, Direct Energy, and Hive brands. The company was formerly known as Yieldtop plc and changed its name to Centrica plc in December 1996. Centrica plc was incorporated in 1995 and is headquartered in Windsor, the United Kingdom.