The energy industry watchdog is not doing enough to help the poorest members of society, according to one north-east fuel poverty charity.
Newcastle-based National Energy Action (NEA) has said the findings of a recent Ofgem investigation were "still not enough" to force the energy firms to reduce prices fairly for those on low incomes, reports the Northern Echo.
Ofgem claimed earlier this week that prices paid by consumers had fallen by over £300 million since the beginning of its investigation, however NEA claims that households on prepayment meters still pay an average of £119 more than those using Direct Debit payment.
It adds this figure rises to £257 more than those who pay by online Direct Debit.
Jenny Saunders, chief executive of NEA, told the newspaper there was still a situation "where many low income households are forced to pay higher energy prices than their wealthier neighbours".
"If Ofgem is serious about helping those on low incomes, it should back calls for a mandatory social tariff," she added.
ScottishPower recently announced it was launching a new social tariff to help its most vulnerable customers, claiming the new prices could help people save £211 annually.
Click here to run an energy price comparison, and see if you could be paying less for your gas and electricity.