There are no signs about not removing food in LHR, but there are in LGW and MAN. There was one in NCL but it mysteriously vanished a few months back.

BOB is irrelevant here. This customer lives his life in public and online (why on earth do people do this?), so we know he was on a longhaul flight, and that if BA FT Neighbourhood Watch™ was in full operation, we would have sent HIDDY yesterday evening to the 4th floor of the Ciudad Cultural Konex in Buenos Aires to recover the ill-gotten gains and return them to Galleries First. I suspect he may have had better things to do.