Great Northern, Piccadilly and Brompton Railway
The Great Northern, Piccadilly and Brompton Railway was a railway company established in 1902. It constructed a deep-level underground tube railway in London. When it opened in 1906, the GNP&BR’s line served 22 stations and ran for 14.17 kilometres. Most of the route was in a pair of tunnels, with 1.1 kilometres at the western end constructed above ground. Today the...