There are many different reasons one should 'Mind The Gap', but would you recognise him if you saw him? This is your London guide to that monstrous beast 'The Gap', and to living to tell the tale.

(Dear reader, keep back from that line,
it always pays to take your time.
A creature's lurking there beneath
with horrid claws and massive teeth.
He's not so nice, a dreadful chap -
so mind your step, and
MIND THE GAP!)