Festival-goers have been told to leave their smart watches at home when visiting Download after the cops received hundreds of accidental calls from mosh pits last year.
Leicestershire Police said on a routine weekend the force handles around 600 emergency calls - but during Download Festival weekend there was 700 more than usual.
Body-worn devices, such as smart watches, automatically calls the emergency services if it senses the wearer has been in a crash or suffered a fall.
The significant increase in calls places a 'huge burden' on call handlers as they have to be assessed and then called back three times to ensure the caller is safe.
This process takes resources away from genuine emergencies, the cops warned.
