Barking Power Station, constructed between 1992 and 1995, is one of the largest independently-owned generating plants in the UK, being capable of generating 1000MW of electricity—about 2% of the peak electricity demand in England and Wales. The station uses Combined Cycle Gas Turbine (CCGT) technology, with gas as its primary fuel, and with NOx emissions as low as 25% of approved levels, the plant has one of the best environmental records in Europe for a gas-fired power plant.