Follow a team of more than 10,000 engineers and construction workers as they race to build a brand new railway under London - Crossrail - London's new Underground.

Julian Barratt
Himself - Narrator

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A look at London's Crossrail, which requires building 42 km of tunnels under the city
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A look at London's Crossrail, which requires building 42 km of tunnels under the city