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HS2 News

HS2 CELEBRATES AS LONGEST TUNNELS REACH HALFWAY POINT UNDER THE CHILTERNS

Two giant tunnelling machines – named ‘Florence’ and ‘Cecilia’ – pass halfway mark during excavation of the 10 mile long Chiltern tunnels. 1.3 million cubic metres of material – enough to fill more than 500 Olympic sized swimming pools – excavated during first 5 miles.

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