Few transportation maps can boast the pedigree that London's iconic Tube' map can. Sported on t-shirts, keyrings, duvet covers, and most recently, downloaded an astonishing twenty million times in app form, the map remains a long-standing icon of British design and ingenuity. Hailed by the art and design community as a cultural artefact, it has also inspired other culturally important pieces of artwork, and in 2006 was voted second in BBC 2's Great British Design Test. But it almost didn't make it out of the notepad it was designed in.
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