HS2 tunnel segments to be built in Kent

The concrete tunnel lining segments that will form the HS2 tunnel between Euston and Ruislip are to come from a factory next to the River Medway in Kent.
The tunnels to be lined will run between West Ruislip and Euston station and will have a total length of 26 miles, the same length as Crossrail. The tunnel boring machines are due to start digging from the West Ruislip portal next year, and the construction of the first tunnel will be completed in 2024.
As the TBM digs, it assembles the tunnel