Fears 300,000 British electricity meters will not work after tech switch-off

Campaigners say homes with RTS meters could be left with heating that is permanently off, or on, from 30 June

The adverts featuring Lorraine Kelly paint a worrying picture of people left without heating or hot water or, perhaps worse in mid-summer, their radiators on full blast.

Either outcome could be possible when the Radio Teleswitch Service (RTS), which controls an old type of electricity meter found in almost 400,000 homes across Great Britain, is switched off from 30 June.