I booked the mid stay car park through holiday extras. I paid in advance and an additional fee in case there was a delay. We weren't delayed however it did take over an hour to get through passport control. When we tried to leave the car park, the barrier did not open and said that I had an outstanding balance to pay of £240 to pay. I called assistance and was told my parking had expired at 3pm. It was 3.40pm. So £240 for 40 minutes, even though I had paid an additional fee in case of delay. The lady then said she would authorise my ticket as if she was doing me a favour.