Upsurge in sleeping problems due to UK's longest heatwave in 40 years

People left tired, irritable and less productive at work after nights of poor shuteye

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.

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.