The vehicle entered what has always been a free car park for rail users and parked up. On returning to the car there was a ppn on the window for not paying the required parking fee. It appears NR started charging for parking back in Nov. There are signs but not very large signs stating a fee must now be paid and giving a number to call. The registration number on the ppn is different to the vehicles registration number but not too dissimilar. Is this pnn still valid. Many thanks