Those with smart meters have been issued a warning by energy regulator Ofgem.
The organisation has warned that there is a growing number of bill payers who are being switched to more expensive energy plans remotely, and in turn hiking up bills without warning.
As the Express reports, energy firms can reportedly use smart meter technology to switch customers who are in debt onto a prepayment meter plan. This can happen as a last resort, energy firms explain, and it can happen when customers are struggling to pay their bills.