The man charged with regulating the energy industry will answer to MPs later today after it emerged profits of Britain's "Big Six" energy suppliers multiplied five-fold to more than £1 billion since 2009.
Ofgem chief executive Andrew Wright is giving evidence to the Commons Energy and Climate Change Committee at 9:30am.
Data released by Ofgem yesterday, show the combined underlying earnings - before interest payments or tax - of the Big Six of £1.19 billion in 2012, a rise of £221 million in 2009.
British Gas, E.ON, EDF, npower, ScottishPower and SSE blamed rising wholesale energy prices, higher distribution costs and Government green levies for the increases.
More top news
Britain was warned by the government's immigration adviser it was becoming more divided as diversity increases.
Tonight mist and fog will spread northeastwards across much of England and parts of Wales. The Met Office have issued a Fog Warning.
The UK is facing "sharper disparities" in inequality despite wider global growth, but monetary policy is not to blame, Mark Carney has said.