Winter is coming – although it feels like it's here already – prompting many of us to reach for the thermostat to keep us toasty as temperatures plunge into single digits.
But while the idea of cranking up the central heating before settling down with a film and a cuppa might sound like the perfect way to combat the cold, keeping it on through the night is not such a good idea.
Experts say getting tucked under the duvet with the thermostat on full blast may be a recipe for a bedtime disaster, making our bodies far too warm to doze off.
Sleep consultant Maryanne Taylor, from The Sleep Works, told Sky News: "If the room is too hot, our body needs to work extra hard to regulate our body temperature during the night.
"This can increase wakefulness and reduce our time in deep, slow wave sleep, which is the all-important restorative sleep, enabling us to feel rested and energetic the next day."
She added: "Scientists have discovered that people who suffer from insomnia have raised body temperature levels when they first go to bed, making it more difficult for them to fall asleep.
"The result of this is an increased state of arousal as their bodies need longer to lose that excess heat, which is causing them to stay awake."
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For the best possible night's sleep, it is recommended that you drop your core body temperature by having a hot bath or shower between 40 minutes and an hour before you go to bed.
The subsequent drop in body temperature aids production of the sleep hormone melatonin, which can be stifled if the room you sleep in is too hot.