HS2’s first giant tunnelling machine broke through this week at the end of its 10-mile (16km) journey under the Chilterns. It has excavated the longest tunnel on the HS2 route.
The enormous 2,000t tunnel boring machine (TBM), named Florence, is one of 10 machines excavating the 32 miles of tunnel on the new railway linking London Euston with Birmingham. It was the first to launch, in May 2021.
A second TBM, Cecilia, is excavating the parallel twin-bore tunnel, which is due to break through in the coming weeks.
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