His design has been shown to senior figures at Transport for London in a presentation - though a spokeswoman for the organisation said it had "no plans" to change the tube map.

BBC: London Underground map gets curves in lecturer's design

On August 24th Tube officials published a heat map of the network.

ECONOMIST: London Underground

Still, the arrival on the map of sponsored stations fits into a pattern of growing commercialisation on the Tube.

ECONOMIST: The Tube goes commercial