"Mind the gap" used to be played only at some 19th-century stations built on tight curves, where the gap between the carriage and the platform could be 20 or ev

"Mind the gap" used to be played only at some 19th-century stations built on tight curves, where the gap between the carriage and the platform could be 20 or even 30cm. (The widest is 37.5cm.) That's a safety hazard, especially for blind people, so the announcements have existed for decades. It's more recent that the pointless announcement has been made at many stations. http://www.metadyne.co.uk/mind_the_gap.htm http://www.metadyne.co.uk/mind_the_gap.htm