Metal music fans heading to the mosh pits of Download festival this weekend are being urged to put their wearable technology into airplane mode to avoid making accidental 999 calls.
Over a routine weekend, Leicestershire Police handles about 600 emergency calls, and a further 800 calls to 101.
But when Donington Park hosts the three-day rock festival, this can leap up by almost 700 calls as people's bodyworn devices such as smart watches "assume they have been in a collision".
The "significant increase" in calls places a huge burden on handlers and can take resources away from genuine emergencies, the force said.
