I used the long stay car park on Wednesday 24th February I'd booked in from 04.00 that morning until 11pm on the night of Thursday 25th February.The booking process online was very efficient. On the Thursday my connecting flight was cancelled and I ended up travelling back on the morning of Friday 26th February.Obviously I'd overstayed my time and expected an additional charge.But I was told by the member of staff on duty approx 11am that morning that I needed to pay an additional thirty eight pounds-which I did. My colleague who was also delayed and parked in the short stay car park was also initially charged the full additional fee.He queried it and it was refunded.I did the same and barring an eight pound fee it was refunded. But it leaves me with a question-are your staff on duty either very poorly informed about the way the system works or deliberately taking extra money off people? Either way it's not a good situation-if I hadn't queried the bill I too would be thirty pounds out of pocket.