UK households told to stock up on £1.35 kitchen cupboard staple in December

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Which? has revealed a hack which helps warm up your room "quickly and efficiently" - and all you need is a £1.35 item . Taking to the @whichuk TikTok account, the consumer experts revealed how to "maximise your heat".

They explained: "Putting foil behind radiators allows the heat to be reflected back into the room. This is particularly effective on external walls.

"You can pick up radiator reflector foil for around £8. It's padded, and usually has an adhesive backing so it's really easy to install. But kitchen foil also works as a low cost alternative."

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Research in the UK has shown that almost any kind of reflective foil (even ordinary aluminium kitchen foil) can reduce this heat loss by