" We‘ d go and sit on the balcony at Terminal 3 at Heathrow, directly under one of the speakers as the roof is low. We put the tape machine in our bag with the microphone poking out of the top. We‘d look for a flight that‘d arrived in the last 40 minutes from somewhere where you‘d expect mental names, then write a letter saying "Could you go and pick up etc. etc. from flight, etc " . That way, it looked like it‘d been arranged in advance as the flight arrival details were written on the note. We also wore an ID-style badge and carried a mobile so that we looked like taxi drivers. One of us would get the first one read out and then the other did the second. We ‘ d pretend to be unable to pronounce it and then hand them the bit of paper with the name written on it. Long winded, but well worth it!"