A typical household would see bills rise by £221 a year, but homes on fixed tariffs are not affected.

Ofgem will on Wednesday reveal the level of the annual energy price cap for July to September as predictions suggests a 13% rise is on the way.

Ofgem will on Wednesday reveal the level of the annual energy price cap for July to September

The average household using both electricity and gas will see an increase of about £18 per month.