Significant progress in excavating 8.4-mile-long HS2 tunnel under London Further significant progress in excavating HS2’s Northolt Tunnel was made when the third of four tunnel boring machines completed its work on 6th June.

Emily was designed specifically for the soft London Clay of the tunnel. www.railadvent.co.uk/2025/06/significant-prog... #hs2 #northolt #SkanskaCostain #strabag

HS2 donates 4,000 tonnes of ballast to the Bluebell Railway Bluebell Railway welcomes the donation of 4,000 tonnes of Ballast from HS2

“We are very grateful to HS2 for making this ballast available to us. www.railadvent.co.uk/2025/05/hs2-donates-4000... #BluebellRailway #GoviaThameslinkRailway #HorstedKeynes #hs2 #NetworkRail #railway_200 #SkanskaCostain #sussex

Excavation of second bore of London HS2 tunnel completed A second tunnel boring machine (TBM) has completed a 5-mile excavation of Northolt Tunnel for HS2.

Excavation of second bore of London HS2 tunnel completed www.railadvent.co.uk/2025/04/excavation-of-se... #hs2 #northolt #SkanskaCostain #strabag