Brian Butterworth (follow him at @briantist) who likes to design tube maps in his spare time now and then, came up with a projected tube map of the future last week – what the network might look like in 2050, if all the future TfL plans and new lines actually come to fruition and are added to the map.
Click on the small image here to get a VERY large image (in SVG format) of the whole thing!
Briantist Map