INFRASTRUCTURE

HS2 launches fourth TBM under London

New tunnelling machine joins three others digging high-speed line under London

The cutterhead of TBM Anne from the Victoria Road Crossover Box Credit: HS2

The cutterhead of TBM Anne from the Victoria Road Crossover Box Credit: HS2

A fourth TBM has launched under London as part of the creation of the UK's HS2 high-speed rail link. Known as the Northolt Tunnel, it will run for 8.4 miles from Victoria Road in Ealing to West Ruislip...

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