Almost 1m UK households are hooked up to heat networks. None had protection from poor service or price hikes … until last month

‘If I could move, I would – to a place without a heat network. But I can’t while this debt is hanging over me,” says Anja Georgiou.

The mother lives with her family in a rented flat in the River Gardens development in Greenwich in south-east London where, three years ago, residents were shocked to be presented with a surprise £200,000 bill for heating and hot water.