NJC.©-2022-Inside HS2's longest tunnel – detailed look at progress on the first 2 miles under the Chilterns
Join TBM Civil Engineering Apprentice Caitlyn on a tour through HS2's Chiltern Tunnel to see the latest progress as our two giant tunnel boring machines (TBMs), Florence and Cecilia, create the tunnel.
The two machines have now completed around 20% of their journeys under the Chilterns and have arrived at the first of five ventilation shafts that are being constructed along the 10-mile tunnel.
To find out more visit www.hs2.org.uk/chiltern-tunnel.
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Find out more our tunnels: https://www.hs2.org.uk/building-hs2/tunnels/
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If you have a question about HS2 or our works, please contact our HS2 Helpdesk team on 08081 434 434 or email email@example.com. "