London tunnels
HS2 is constructing 26 miles of tunnels under London. from Euston to West Ruislip - the Northolt tunnel and the Euston tunnel.
Northolt tunnel
Northolt tunnel is the second longest tunnel on the Phase One route. The tunnel will carry passengers from Old Oak Common station 8.4 miles under London to West Ruislip. We will need four tunnel boring machines to build this tunnel and when they finish, they will be extracted at Green Park Way vent shaft.
Watch this video about the Northolt Tunnel’s portal at West Ruislip.
Euston tunnel
The Euston tunnel is a 4.5 mile tunnel that will take passengers from Euston station to Old Oak Common station. The tunnel will be built using two tunnel boring machines. They will start tunnelling at Old Oak Common and work their way towards Euston.
Watch this video filmed about the Euston Approaches, one end of the tunnel.