Former Prime Minister Sir John Major has reportedly called for energy companies to pay an excess profits tax if the Government is forced to make winter fuel payments due to the rise in bills.
Bloomberg's political correspondent Kitty Donaldson wrote on Twitter:
John Major calls for an excess profits tax on energy companies if govt forced to make winter fuel payments
Scottish Power has increased its gas and electricity bills as rifts appear in the Coalition over green energy taxes.
David Cameron has announced a review of competition in the energy market and vowed to roll back green regulations.