We operate gas- and coal-fired power plants, undertaking base load (the load used for heating, lighting, compressors and pumps when there is no production) and cycling duties. We operate three major plants in the UK with a total capacity of 4.8GW. Sutton Bridge in Lincolnshire is a Combined Cycle Gas Turbine (CCGT) plant with a design capacity of 819MW, commissioned in May 1999. Cottam and West Burton in Nottinghamshire are both four-unit coal-fired plants, commissioned in 1970. Cottam has a capacity of 2,008MW and West Burton (which also has two open-cycle gas turbines) has a total registered capacity of 2,012MW. We generated 25.4 TWh of electricity for sale in 2007. Output from our plants supplies our residential and SME customers.