A study at the University of Surrey shows brighter days and cooler nights can improve sleep for people with dementia.

Researchers monitored 70 people at home, collecting over 26,500 days of data using under-mattress sensors and contactless technology.

Hotter bedrooms disrupted sleep and raised breathing rates, while brighter indoor light during the day led to longer, more restful sleep.

The findings suggest simple changes to the home could help people with dementia sleep better and improve their daily wellbeing.