Andrew Wright, Ofgem’s interim chief exec, said that he wanted to see this money returned to businesses.
He said: Where this can’t be done any remaining sums should be used to benefit consumers more generally, and suppliers need to be very clear with consumers about what they will be doing with this money.
John Allan, national chairman of the Federation of Small Businesses, said: With small firms struggling with increasing energy prices it is wrong that the big six are holding on to money that should rightfully be in the pockets of both their business and domestic customers.
The energy companies must quickly repay those who have been overcharged and lay out a plan to ensure this activity won’t be repeated.
Ofgem also found that 3.5m domestic customers are owed 202m.