HS2 completes first 'green tunnel' as Copthall milestone signals construction momentum

Rail Technology Magazine - HS2 has reached a significant milestone with the completion of its first cut-and-cover mp;#39;greenmp;#39; tunnel, marking visible progress on Britainmp;#39;s new high-speed railway. The 880-metre Copthall tunnel, located near West Ruislip on Londonmp;#39;s western edge, is the first of five such structures along the route between the capital and the West Midlands to be fully completed, including its earth covering.