French energy giant EDF is charging UK households almost two-and-half times more than those across the Channel.
EDF customers in Britain have their annual bills capped at £1,971 under a system overseen by the regulator Ofgem. But French customers on regulated tariffs face bills of around €950 (£803).
And while Ofgem is expected to announce an eye-watering 80% surge in its price cap at the end of this month, French President Emmanuel Macron has told state-owned EDF it can only increase bills by 4%.
