Much of the avoided energy consumption will come from the switch to carbon-neutral district heating (rural households will switch from oil, natural gas, and electric heating to heat pumps and biomass burners).

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If you get within a certain number of miles from home, your oven might start heating up, or your humidifier would switch on.

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We are wasting millions, contributing more to global warming than industry, letting pensioners get cold despite free central heating systems they can't afford to switch on, and letting kids get asthma in damp cold bedrooms and overheated classrooms.

BBC: The ?1,000-a-year heating bill is here.