Consumer group gives many of the biggest suppliers low ratings in its annual survey of energy provider performance

Scottish Power has been ranked Britain’s worst energy supplier for customer service in a survey from a leading consumer body that placed many of the UK’s biggest suppliers at the bottom of the league table.

British Gas and EDF Energy were just above Scottish Power at the foot of the annual Which? rankings. These are based on a satisfaction survey of almost 12,000 energy customers and a Which? assessment of each supplier’s customer service.

The consumer group found that Scottish Power had the lowest score for customer satisfaction and tied with EDF Energy for the second lowest score on the consumer champion’s assessment. The weakest performer was So Energy, which finished fourth from bottom overall.

Other large suppliers in the lower half of the league table included Ovo Energy, which finished fifth from bottom, and E.ON Next, which tied with Ecotricity and Fuse Energy as the sixth worst suppliers in the rankings.