Move by electricity and gas supplier increases pressure on Theresa May to intervene over energy costs
The government is under mounting pressure to take strong action on rising energy bills after one of the “big six” suppliers imposed its second price hike this year on 1.5 million customers.
The consumer group Which? urged Theresa May to step in if energy groups, which have made a series of tariff increases in 2017, do not help households circumvent the steepest increases.
Related: How to beat UK energy price rises