The age of steam returned to the London Underground today, to mark the 150th anniversary of the first ever tube journey. Hundreds of rail enthusiasts and families lined bridges and stations between Kensington and Moorgate to catch a glimpse.
Among the lucky passengers was Mayor of London Boris Johnson and our reporter Ria Chatterjee.
A steam train which carried passengers in the 19th Century has returned to mark 150 years since the first tube journey.
A look back at some of the stops on London Underground's 150 year journey.
All day we've been adding fascinating facts about the Tube, which turns 150 years old this week. Now find out how much you know.