Larger trains on the Northern line? The 1860s railway that could have been

If a planned railway from the 1860s had come to pass, people travelling on the Charing Cross branch of the Northern line could have been travelling in much larger trains than they do today.
Following the success of the Metropolitan Railway, which opened in 1863 to great acclaim, several plans were put forward for new railways in central London. One of them, the North Western and Charing Cross Railway (NW&CCR) was proposed in 1863 to build a line linking Euston and Charing Cross.
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