Britain’s longest heatwave since 1976 has led to a upsurge in sleeping problems, with people left tired, irritable and less productive at work after sweaty nights of poor-quality shuteye, reports The Guardian.

Record temperatures of up to 32.4C (90.3F) have been stopping many people getting a proper rest as they struggle to get to sleep in rooms that are uncomfortably warm, experts say.

“I’m very aware of people reporting more difficulties sleeping as the temperature increases, both personally and professionally,” said Dr Michael Farquhar, a consultant in sleep medicine at the Evelina Children’s Hospital in London.

“It’s a phenomenon we’re becoming used to as we have yet another London summer where bedroom temperatures are regularly sitting at 30C.