Giant machines for HS2’s Chilterns tunnels unveiled – BBC News
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The 2,000-tonne machines will make a tunnel under the Chilterns starting in 2021
Two tunnelling machines bought to help build HS2 have been unveiled by the firm behind the high-speed rail line.
The excavators will bore a 10 mile (16km) tunnel through part of the Chilterns, from a site near the M25 to near South Heath in Buckinghamshire,
HS2 Ltd chief executive Mark Thurston said the machines would “be a defining moment in the history of HS2”.