Parking question: Pre-booked in the Mid-park and went to print my confirmation, just in case. Realised that I had booked for 24 hours less than the journey. Tried to extend the booking (and pay) but the LLA site said that there was no space. I thought this strange, so used a different browser and blocked cookies to try a booking for the dates I actually need. No surprise that the space was available for the whole trip.
So, when I overstay by 24 hours, can I just pay the surcharge at the barrier? Will the system prevent me leaving?