Energy bills for 15 million households will rise by at least 12 per cent from October after record high gas costs led the regulator to increase the price cap.
The biggest bill increase in a decade will mean 11 million households on standard variable or default tariffs pay an extra £139 a year, taking their annual bill to £1,277 based on average usage.
Ofgem said that gas bills would rise by 17 per cent and electricity bills by 8 per cent, leading to a 12 per cent rise in a typical dual fuel bill.
Four million households with prepayment meters will see an increase of £153 a year, or 13 per cent, from October, taking a bill for a typical household to £1,309.
Consumer groups
