The 1931 diagram was drawn up by an English engineering draftsman, Harry Beck in his spare time while working as an engineering draftsman at the London Underground Signals Office. Following this principle of spending time following his interest, the designer Mark Noad has taken his inventiveness in graphic design and created a map that ensures that the stations are geographically-accurate in relation to each other, though scale in the outer zones appears to be a bit of a debate.
Click on the photo to see the full map and the other variations, e.g. pedestrian connections or step free access that the enterprising Mr Noad has put togther for our convenience. TfL eat your heart out!