hi on entering the short stay car park I took the ticket from machine as instructed parked up and thought no more about trying to get out on return !!!! I had booked car park until 2300hrs we landed at 22,20 we proceeded to the exit barrier as instructed with ticket issued on entry only to find that the machine said ticket expired pay at machine so the barrier stayed down I had 3 cars queued up behind me waiting to get out so I was stuck with no way off getting out I had to ring for help the nice guy I talked to said I need your booking ref number as the camera scanning my number plate was not registering my entry eventually after a 5 min search in hand luggage I found my paperwork told him ref number by this time I had been stuck at barrier 10mins this in my opinion is not good enough as I paid more to be in the short stay closer to terminal than the cheaper long stay to which I have parked lots of times without any hassle to exit whatsoever