Generally good for the first time we have used priority parking. Couple of points. Was not really sure of the procedure for exit once we had been issued with our parking ticket. As we had payed in advanced we decided to insert the ticket in the payment machinebefore we left the priority parking area. Glad we did as we had incurred a £22 pound charge as our flight was diverted to Glasgow due to fog.- had to get a coach back to Aberdeen!. Glad we decided to check as we would not have been able to exit at the exit barriers. Think it would also be appreciated that for flights diverted to other airports which result in an unplanned extended car park stay the extra charge could be waivered. But this would need flight details being taken at time of booking. thanks