Their shared goal was to link the two lines together in a circle under central London. Over the coming weeks, we’ll be using maps to tell you the story of each of London’s Tube lines. The images used ...

Their shared goal was to link the two lines together in a circle under central London. Over the coming weeks, we’ll be using maps to tell you the story of each of London’s Tube lines.

Their shared goal was to link the two lines together in a circle under central London. Over the coming weeks, we’ll be using maps to tell you the story of each of London’s Tube lines. The images used ...