The energy price cap will rise by 54 per cent from April this year, Ofgem has announced.
The rise will see average annual bills rise by around £693 to as much as £1,971 for standard tariff customers and £2,017 for prepayment meter customers.
The energy regulator sets a new price cap - the maximum amount suppliers are allowed to charge their customers - every six months, and it affects around 22 million homes across England, Wales and Scotland.