Connaught Tunnel is part of the North London Line from Stratford, serving the Royal Docks in the East of London, Silvertown especially. Built in 1886 as far as M02W and I can ascertain its not particularly long at around the 600 yard mark, but was a major Feat of Engineering considering its Location under the Albert Dock!. In fact the Tunnel had to be Reconstructed as Keels of Ships and Boats were Catching on the Bore!!.
There we go, my first Rport, go easy on the Critique Guys.