Americans a subway is not a subway.if you go down some stairs next to a sign that say subway ,yoy are simply going to go under a street and back up to the other side of it. You are not going to catch the next train to Piccadilly Circus.if you want to get a train to go there,look for the London Underground sign. Of course,subway tunnels under steets are a very good idea because the British drive on the wrong side of the road