I purchased my parking online and all went well until our return to the UK. On leaving the car park the camera did not register our car reg and would not lift the barrier to let us out. We received abuse from a line of people waiting to leave but were told by the parking office to leave the car and go into the office as we had not paid and would have to pay £89 in the office. I refused to pay and told the office I had paid on line and had even been contacted for an upgrade. After another 10 or so minutes the officer said ah yes you have paid and gave me another ticket as my had been swallowed by the machine. I ran the gauntlet of abuse from other users as I went back to my car. A great holiday ruined next time it's a taxi for me and the family well done airport parking!!!!!