Regulator is urging anyone who has moved in recent years to check whether they are owed a refund
Almost 2 million energy bill payers could be owed a share of £240m from old accounts that were closed while still in credit, according to the regulator.
The latest figures from Ofgem show that about 1.9m energy accounts were closed over the past five years, with outstanding credit balances totalling £240m left unclaimed.
