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Campaigners estimate more than 300,000 homes could lose heating - or have it stuck on constantly - in what energy regulator Ofgem has called "an urgent consumer welfare issue".

RTS meters typically control heating and hot water on a separate circuit to the rest of the household's electricity, so things like plug sockets and lights are unlikely to be affected by the switch-off, Ofgem said.

If your energy supplier cannot fit a smart meter in your home, Ofgem says your supplier must install a "suitable meter" with no disruption to your service.

Domestic energy prices are forecast to fall in July, reversing three consecutive increases in regulator Ofgem's price cap.

The energy price cap covers around 22 million households in England, Wales and Scotland and is set every three months by Ofgem.