%VIRTUAL-SkimlinksPromo%Britain's biggest energy firms have been told by the regulator Ofgem to refund former customers more than£400 million held in closed accounts.
Consumer groups said it was "shocking" that the "Big Six" gas and electricity suppliers had kept such large sums and urged them to return the money as possible.
Let us send you our newsletter.
Our editors will email you a roundup of their favourite stories from across AOL