My son tells me the story that he and his wife arrived at Heathrow a bit early for their flight to New York. He had apple air tag and when he boarded their flight the tag showed no results. Upon arrival at New York the tag showed it was already in the terminal. At the baggage relaim belt it showed it was there but not quite. Case did not appear and they went to ' lost luggage ' and the case was already there ...it appears to have been put on the earlier flight ( BA )