The London Underground Map - Documentary BBC

The underground map is one of the greatest ever bits of graphic design and information design to come out of the United Kingdom. i came across this documentary filmed by BBC4 Design Classics series, this was filmed some time ago but is a great watch. this documentary looks into the problem the underground has had from conception to show the travelling public how to get around its network. it then goes on to show Harry Beck's idea based on an electrical circuit was received with great applause. this then has been developed over the years to great success. the greatness of this can be now seen throughout the world influencing many underground, road and air maps / diagrams. 

a great watch! please comment on what you think