Ofgem: Money is deeply buried in 'big six' accounts
The "big six" energy companies have been told to hand back more than £400m owed to customers.
Credit left in customer accounts when people and businesses move or switch suppliers has accumulated over the past six years, Ofgem said.
Ofgem director Philip Cullum told BBC Breakfast the watchdog's action "reflected the significance of the issue".
28 Feb 2014
- From the section Business