INFRASTRUCTURE

Final breakthrough for HS2's longest tunnel

Second 10-mile drive completed by a TBM working on UK high-speed rail project

TBM ‘Celia’ breaking through at HS2’s tunnel under the Chiltern Hills completing a 10-mile journey that began in June 2021 Credit: HS2

TBM ‘Celia’ breaking through at HS2’s tunnel under the Chiltern Hills completing a 10-mile journey that began in June 2021 Credit: HS2

Named Cecilia, the TBM has driven for 10 miles underground to join twin sister machine - Florence, which arrived at the site near the Buckinghamshire town of Wendover on 27 February after completing her...

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