Households already owe £1.3 billion to their energy suppliers two months before bills are set to soar by more than 80%.
The overall debt bill is already three times higher than it was a year ago, experts at Uswitch said on Wednesday, and it seems likely it will grow further over the winter.
Six million homes across the UK owe an average of £206 to their energy provider, according to a survey from the company. In April the same average debt was £188.
