It was with BUZZ (the defunct BA subsidiary) at some horrid satellite terminal they bus you into at Stansted I've never been to again since.

Unlike everywhere else in the airport, all the gates at this satellite have the same number, it's the accompanying letter that's different. I arrived late with just hand luggage and managed to catch up with the last stragglers, hand in my boarding pass and get into the plane. Only to find out it was going to Venice and not Milan. They opened the door for me and I joined the end of the other queue for my flight which was leaving about 10 minutes later.