My sister Stacy sent my brother Gary a t-shirt for Xmas that says “Mind the Gap” the famous phrase that is announced on London Underground platforms as the trains are coming in to warn people not to step into the gap between the train carriage and the platform. Here’s a website that examines the origin of the phrase.
People who have visited England’s capital city say ‘Mind the Gap’ to each other – often accompanied by knowing glances and subtle nods – while the rest of the world wonders what they are on about. This article introduces some little known facts about the phrase and its usage.”
And here’s the official London Underground’s website, where you can buy a “Mind the Gap” t-shirt or even the logo from your favorite Underground stop. Apparently, the trendy thing to do is wear your stop’s logo around so people can introduce themselves if they live near you.