HS2 tunnellers clock up first mile under Chilterns

 first TBM drive has passed the one-mile mark cutting through a mix of chalk and flint beneath the Chiltern hills just outside London.

Launched in May, TBM Florence is one of two identical machines excavating the twin 10-mile-long tunnels.

Align Project Director Daniel Altier said: “I am delighted with the progress that Florence has made since its launch in May, with Cecilia not far behind.

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HS2 tunnellers clock up first mile under Chilterns

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