People heading for the Lockdown festival at Powderham are being warned that a zero tolerance policy on drugs is being enforced there.
This year the police have joined forces with the National Crime Agency for the first time to make sure the event is safe and secure.
The NCA are providing staff who're working alongside local officers at the event.
Officers with sniffer dogs will be checking everyone going in and there'll be police on duty inside the festival.
Last year six people were arrested for drug offences and one was sentenced to five and a half years in prison for dealing.
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