Labour claims that consumers are losing out because energy companies buy overpriced electricity from their own subsidiaries.
Energy tariff changes due to come into force will help rebuild consumer trust, Ofgem claims.
Energy firm Scottish Power is to reduce dual-fuel prices by 3.3 per cent from 31 January as it passes on savings from the government's green levy shake-up.
Hundreds of thousands of homes were left without electricity over the festive period due to severe storms - and MPs want to know why it took so long to restore power.
Households left without electricity following the Christmas storms have now had their power restored.
Energy company npower is to pay £3.5 million to vulnerable customers after it was found to have breached energy sales rules.
Fuel poverty campaigners are calling for greater investment in home insulation in order to tackle the problem.
Many people in the UK are considering a frugal existence in the run-up to Christmas, according to a new survey.
Britons are now spending more on rent, fuel and power than they are on transport, according to new figures.
More than half of UK families argue about their home's temperature resulting in many spending time in different rooms, according to new research.
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