Ofgem has defended its decision to order energy firm E.ON to pay £12 million to customers, despite the company making an £8 billion turnover.
Sarah Harrison, the regulator's senior partner in charge of enforcement told ITV News that compensation was not the only issue at hand, but making the energy market "simpler, clearer and fairer for customers" was also an important factor.
E.ON has said it will compensate customers it may have mis-sold to. Find out how to make a claim.
E.ON boss Tony Cocker has apologised after the energy firm was found to be misleading customers, according to an investigation by Ofgem.