Jago Hazzard on the failure of Ludgate Hill station

Ludgate Hill station? Wikipedia gives the basics and Jago's video gives you so much more:

Ludgate Hill was a railway station in the City of London that was opened on 1 June 1865 by the London, Chatham and Dover Railway as its City terminus. It was on Ludgate Viaduct (a railway viaduct) between Queen Victoria Street and Ludgate Hill, slightly north of St. Paul's station (now called Blackfriars station) on the site of the former Fleet Prison. 

North of Ludgate Hill station, Ludgate Viaduct continued to the Snow Hill tunnel to connect with the then recently opened Metropolitan Railway south of Farringdon station to enable main-line trains to run between north and south London.

Passenger services through the tunnel ended in 1916, after which services ran only the few hundred yards (metres) to Holborn Viaduct station which had opened in 1874. Ludgate Hill became little used because of its proximity to the Holborn Viaduct and St. Paul's stations, and on 3 March 1929 Ludgate Hill was closed. 

The platform buildings remained derelict until they were demolished in the 1960s but the island platform remained until 1974. Remains of the street-level buildings and traces of the platform and staircase lasted until the whole station area and viaduct were demolished in 1990.

It's remarkable how long the Snow Hill tunnels lay unused.

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