Though the concept isn't entirely novel (others have made the most of TfL's open data to create their own before now), ...

When you open the map you’ll see all the familiar squiggly coloured lines (red for Central, dark blue for Piccadilly, etc) and stations represented by dots. On each line, there darker lines ...

The 23-year-old created an alternative Tube map featuring Surrey towns and villages on the colourful map. When she shared the map on social media, some people mistook it for a real proposal ...