Perhaps not only in Cambridge (or Oxford) would you hear the announcement, "If there is a Professor Evans on the station, please return to the ticket office. Professor Evans, return to the ticket office." But I'd be willing to bet that only in Cambridge (or Oxford) would you see not one, but two people - who weren't together - on the platform turning around to go to the ticket office.
The mathematicians with whom we share our building periodically put problem sheets in the lifts. The mag team packed ourselves into the lift on our way out to Friday lunch one afternoon. We perused the problems. One caught our eyes. It read, "Is it possible to fit a bigger cube through a hole in a smaller cube?"
Me (chemist): "It depends on the materials. If the bigger cube is made of aerogel, then yes. If it's a solid block of stainless, probably not."
Her (mechanical engineer): "No, it depends on the quality of the design for the collapsible frame of the bigger cube."
Him (physicist): "How big is the hole? Or is it black?"
Me: "Why do I get the feeling we've somehow missed the point?"