Mr T.
The charges have increased to £3 an hour per car maximum £12.
That is unless you have a Multi-Entry ticket, which at the moment works out at £1 per entry, this is also about to change to a plastic card with a photo and you will have to pay for the plastic card. ( I have heard £20)
The biggest problem is getting out, it's taking 30 minutes at peak times
E.F.