Centrica is an energy and services company. Co.'s segment are: Energy Supply and Services, which supplies gas and electricity in the U.K. and North America; Connected Home, which supplies energy solutions and technologies to residential customers; Distributed Energy and Power, which supplies energy solutions, generation and technologies to commercial and industrial customers; Energy Marketing and Trading, which trades and optimizes energy; Exploration and Production, which produces and processes gas and oil and develops new fields; Central Power Generation, which generates power from combined cycle gas turbines, wind and nuclear assets; and Centrica Storage, gas storage in the U.K.

SSE is engaged in producing, generating, distributing and supplying electricity and gas, as well as other energy-related services, across the U.K. and Ireland. Co. has three principal business areas: Wholesale, which uses turbines to convert energy from gas, oil, coal, water and wind to generate electricity, trading in wholesale energy markets, and managing energy contracts; Networks, which transmits and distributes electricity and gas to homes and workplaces; and Retail, which supplies electricity and gas and related services to households and organizations.