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London tunnels

HS2 is constructing 26 miles of tunnels under London. from Euston to West Ruislip - the Northolt tunnel and the Euston tunnel.

An annotated map showing the HS2 line or route under West London and the extent of the tunnels.

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.

Northolt tunnel location map

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.

Euston tunnel location map

Watch this video filmed about the Euston Approaches, one end of the tunnel.