Centrica plc is an integrated energy company. The Company operates in four segments: British Gas, Centrica Energy, Centrica Storage and Direct Energy. The Company generates power through its wind farms, nuclear and gas-fired power stations. It provides central heating, boiler and cooling maintenance and breakdown cover products. It also supplies energy to homes and businesses in the United Kingdom and North America. The Company has estimated proven and probable (2P) gas and liquids reserves in Europe, North America and Trinidad and Tobago. The principal fields in Centrica Energy are the Kvitebjorn, South Morecambe, Cygnus, Statfjord, Valemon, Chiswick, NCMA Poinsettia, York, Maria, Rhyl and Grove fields. The principal field in Centrica Storage is the Rough field. The principal fields in Direct Energy are the Foothills, Medicine Hat, Carrot Creek and Central Alberta fields located in the province of Alberta, Canada.