The diagram of one of the machines used to excavate the original tube tunnels is on the headwall of the circulating area at the bottom of the escalators to the Bakerloo Line platforms at Paddington tube station.
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Photo by <a href="mailto:cmckenna@sucs.org?subject=rail-photo at railfaneurope.net">Chris McKenna</a> 10/08/2006.<br>
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