Shadow energy secretary Caroline Flint said Ofgem's report shows the Prime Minister "is too weak to stand up to the energy companies and just stands for a privileged few".
Ms Flint said, “However you look at it, there’s no hiding the fact that on David Cameron’s watch the energy companies have increased their profits on the back of spiralling bills for hard-pressed consumers.
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Berlinah Wallace will serve a minimum of 12 years behind bars.