Locking car park gate

We had an incident over Easter weekend where a member of the public walked onto one of the fields, this is obviously not acceptable. Please can I ask that you lock the car park gate after you when you arrive so that no one without a booking can walk in. I have ordered a ‘Private pre book only’ sign and will send an email out to everyone to reiterate this request of locking the car park gate when you arrive.

Thank you