Centrica Plc is an energy services and solutions company. The Company's British Gas Energy segment is engaged in supplying gas and electricity to residential and small business customers in the United Kingdom. Its British Gas Services and Solutions segment provides installation, repair and maintenance of domestic central heating and related appliances, and the provision of fixed-fee maintenance services. Its Bord Gais Energy segment supplies gas and electricity to residential and commercial and industrial customers in the Republic of Ireland. Its Energy Marketing & Trading segment is engaged in the procurement, trading and optimization of energy in the United Kingdom and Europe. Centrica Business Solutions segment supplies gas and electricity and provides energy-related services to medium and large business customers in the United Kingdom. Its Upstream segment is engaged in the production and processing of gas and oil and the development of new fields, principally within Spirit Energy.