Some 400,000 households in England – many of them including vulnerable older people – face energy bills of up to £4,679 a year, experts warn.
These households are not protected by the energy price cap and need urgent help, the National Housing Federation (NHF) has said.
The affected homes are on communal networks and have their heating supplied through a central boiler that reaches all homes in a building, rather than having an individual boiler in their home.
