Running between Edgware, Mill Hill East and High Barnet to the North of London to Morden to the South, the London Underground's Northern Line stretches for 36 miles and takes in 50 stations. The line, marked in black on the Tube map, is a familiar sight to London commuters. But is the map of the line accurate? Does it reflect reality?

A geographic map of the line looks something like this. The Northern spurs of the line merge at Camden Town and then split into two branches, one via Charing Cross and the other via Bank, before merging again at Kennington and heading towards the Southern terminus at Morden.