Date is confirmed for the 27th. It opens at 10am and only cost £15 for the day, site has a toilet and butty van and some big plant equipment to recover you if you really get stuck
If it rains next week you would be better on mud tyres if you have them, if not then make sure you bring your wellies and some good recovery equipment because you will be using it
Post code is WN3 4NL.
Rick.