The Metropolitan line is the oldest underground railway in the world - here's a brief history of the route in four forgotten historic maps.

This paved the way for the first London Tube map as we know it to be produced in 1908. The map included the Great Northern, Piccadilly and Brompton Railway – now the Piccadilly line – which ran ...

Over the coming weeks, we’ll be using maps to tell you the story ... and Moorgate in east London. A northern spur of the line was also soon up and running, carrying passengers to Swiss Cottage ...