Today marks the 50th anniversary of the Bakerloo line trains on the London Underground. Introduced on 26th June 1972.
The trains have a complicated history — because this is the London Underground and nothing is ever simple. And the Bakerloo line trains owe their existence to, of all things, the extension of the Piccadilly line to Heathrow Airport in the 1970s.
Read the article from Ian Visits website here