Centrica: customer and site numbers by type 2014-2022

Between 2014 and 2021, the number of customers and sites supplied by British multinational utility company Centrica has been in steady decline. In 2021, roughly 6.3 million customers and sites were supplied gas by Centrica. This was a decrease of over two million compared to 2014. However, the number of customers at Centrica recorded an increasing trend.

Domestic market shares

Through its England, Wales, and Scotland serving subsidiary British Gas, Centrica has the largest market share of both the gas and electricity supply in Great Britain. The energy service provider had a share of 27 percent of the gas supply market over the last few years. Similarly, British Gas was the leader in the electricity supply market, with a market share of 20 percent at the end of 2022.

Energy supplier switching in the UK

Although the company’s market share and the number of its customers decreased over the past few years because of increased competition in the sector, several small energy suppliers failed in 2021 and 2022 because of the energy crisis. Therefore, the trend in energy supplier switching in the UK was reversed for the first time in decades. In 2022, the number of consumers switching from small and mid-tier suppliers to larger ones surpassed the number of consumers changing to smaller suppliers.