Philip Cullum from Ofgem says energy suppliers should return money to former customers after the regulator found that firms are holding more than £400 million in credit from closed accounts. He also said Ofgem would go back to the Government if it felt it needed more powers to punish. Report by Fudgea. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn