This from the usvsth3m website: “This took us bloody ages and we hope you like it because putting it together made us see phantom Tube lines when we close our eyes.”
You can see @DylanMaryk's original map HERE. And the Us vs Th3m website is HERE. A London Walk costs £9 – £7 concession. To join a London Walk, simply meet your guide at the designated tube station at the appointed time. Details of all London Walks can be found at www.walks.com