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Tunnels

Connecting the country, creating thousands of jobs and rebalancing the UK economy
The Chiltern tunnel approach at its South Portal in Hertfordshire.

Over 80 miles of tunnel will be built to carry HS2 trains

We're currently constructing new tunnels between London and the West Midlands, forming part of the HS2 network that will help connect the country, create thousands of jobs and rebalance the UK economy.

How we’re building our tunnels

Aerial view of TBM Cecilia shortly after beginning her journey

HS2’s tunnels will be built using different construction techniques to suit their purpose and local conditions. We’re building them under cities and the countryside to help reduce the impact on people and nature.

Find out more about how HS2 will build tunnels

London tunnels

Northolt tunnel

The tunnel will carry passengers from Old Oak Common station 8.4 miles under London to 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.

Buckinghamshire tunnels

Chiltern tunnel

The longest and deepest tunnel will be the Chiltern tunnel measuring 10 miles (16km) long and will go as deep as 90 metres.

Wendover tunnel

Wendover tunnel is a green tunnel is a tunnel located to the west of Wendover just under one mile in length.

West Midlands tunnels

Bromford tunnel

The Bromford tunnel is a 3.5 mile twin-bore tunnel situated just outside Birmingham.

Burton Green tunnel

The Burton Green tunnel is the shortest of all tunnels on the Phase One route measuring only half a mile in length.

Warwickshire and Northamptonshire tunnels

Chipping Warden and Greatworth tunnels

The Chipping Warden tunnel and Greatworth tunnel are both green tunnels 1.5 miles and 1.6 miles in length.

Long Itchington Wood tunnel

Long Itchington Wood tunnel is unique as it is the only tunnel on the HS2 Phase One route that uses two tunnelling construction methods.

Tunnel boring machines

The two TBMs (Cecilia and Florence) that will be creating the tunnels from the South Portal under the Chiltern Hills at the factory in Germany, with the blue cutting faces evident.

Ten giant tunnel boring machines (TBMs) will dig the 64 miles of tunnels between London and the West Midlands. Each machine operates as a self-contained underground factory – digging the tunnel, lining it with concrete wall segments and grouting them into place at a speed of around 15 meters a day.

Find out more about our giant tunnel boring machines

Did you know?

We’re currently constructing the tunnels that will serve the London to West Midlands section of the railway. These will be constructed in a number of different locations along the route. In total 130 million tonnes of earth will be excavated, enough to fill Wembley Stadium 15 times.

Aerial view of TBM Cecilia shortly after beginning her journey

Aerial view of TBM Cecilia shortly after beginning her journey