Cycle the Underground,overground,wombling free,making a tube map for a poster for me

Oh, and ...

She claimed to have walked 3000 miles up every street in London, sometimes up to 18 hours a day. It does'nt say how long it took her, but walking pace is an average of 3mph so thats about 1000 hours, which is bloody epic and puts my efforts to shame.

I think I've read on the Internet that this is a myth. It may be a myth that it's a myth, though.