Thanks, the trouble is there is NO other parking (paid or otherwise) shown that is not restricted to customers only.... excerpt from the penarth marina handbook:
CAR PARKING There are three car parks available for customer use. These are along the edge of the outer basin, opposite the main access gate of the inner basin (the car park with the barrier) and at the south western end of the inner basin. Berth holders have free parking and there is a pay and display facility for visitors.
CAR PARKING There are three car parks available for customer use. These are along the edge of the outer basin, opposite the main access gate of the inner basin (the car park with the barrier) and at the south western end of the inner basin. Berth holders have free parking and there is a pay and display facility for visitors.