Map : I have a map of the London Underground pulled from the walls of the system itself. It shows the Heathrow area under construction. Any idea how old it is? A range of possible years?

Map Info & Chart : I have a map of the London Underground pulled from the walls of the system itself. It shows the Heathrow area under construction. Any idea how old it is? A range of possible years?

I have a map of the London Underground pulled from the walls of the system itself. It shows the Heathrow area under construction. Any idea how old it is? A range of possible years?

By walter8478i

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