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HS2 completes civil engineering works on longest tunnel project

Important civil engineering milestone reached on UK’s new high-speed railway

Duncan Moore
HS2’s Chiltern tunnel north porous portal

HS2’s Chiltern tunnel north porous portal | Credits: HS2 ltd

The closure of work at two of the HS2 line's Chiltern tunnel vent shafts at Chesham Road and Little Missenden brings to an end a project that began almost five years ago. Once fitted out with tracks...

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