The EUR 2.7bn project was delivered in joint venture with Spanish engineering company Ayesa.
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HS2’s reveals first completed ‘green’ tunnel
- Guest authors
- July 7, 2026
- 0
The first completed cut and cover tunnel on Britain’s new high-speed railway has been revealed at a site on London’s western periphery. HS2’s 880-metre Copthall ‘green’ tunnel near West Ruislip has been created using 1.2 million cubic metres of material excavated during construction of the line’s nearby twin-bore Northolt tunnel. Originally planned as an open […]