Does your bedding contain this hidden sleep thief? What it is and how to avoid it, according to sleep experts

A white bedroom with panelled walls and white bedding.

When a heatwave descends, most of us are more likely to get a bad night's sleep as we toss and turn attempting to avoid overheating.

However, there is one hidden 'sleep thief' that sleep experts say could be lurking in our bedding and causing us to get all hot and bothered at night, whether there's a heatwave occurring or not.