The CMA has accused the big six of overcharging customers by as much as £1.7 billion a year – something the suppliers angrily deny. So who is right? Utility Week investigates.
Analysis: What is a fair price?
The CMA has accused the big six of overcharging customers by as much as £1.7 billion a year – something the suppliers angrily deny. So who is right? Utility Week investigates.