Big six energy firms' profits soar

The profits made by the Big Six energy firms in supplying British households have multiplied five-fold to more than £1 billion since 2009, according to figures from regulator Ofgem.

It meant they pocketed an average of £53 profit per home last year, representing a profit margin of 4.3% - up from £30, or 2.8%, in 2011.
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