Mirror.co.uk: Fuelling fears over high energy costs

Customer champion Energywatch blamed rocketing bills on lack of competition - 10 years ago there were 20 energy firms vying for business, now there are just six.

Energywatch chief Allan Asher told the Commons Business and Enterprise Committee: "There is a myth about vigorous price competition between suppliers.

"For the product they most actively sell - direct debit for 'dual fuel' gas and electricity - the price difference between the cheapest and the most expensive is about £30 a year, a few pence a week."