Centrica plc is a British multinational energy and services company with its headquarters in Windsor, Berkshire. Its principal activity is the supply of electricity and gas to businesses and consumers in the United Kingdom, Ireland and North America.
It is the largest supplier of gas to domestic customers in the United Kingdom, and one of the largest suppliers of electricity, operating under the trading names Scottish Gas in Scotland and British Gas in England and Wales. It owns Bord Gáis Energy in Ireland. It is also active in the provision of household services including plumbing.
Centrica is listed on the London Stock Exchange, and is a constituent of the FTSE 100 Index.