WELCOME to the RAIL Crossword. In this issue, we're giving away copies of The Birth of the Tubes to two successful solvers, courtesy of Capital Transport (wvm.capltaltransport.com). From the discovery of electricity and the invention of the tunnelling shield came the birth of the deep level tube railway. Until then, underground railways had to be steam-worked and built just under the road or below buildings, creating enormous disruption during construction and the need for ventilation openings along the route to allow the escape of fumes.
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