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High Speed 2 Main Works

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High Speed 2 Main Works

  • HS2 Phase 2

Skanska, as part of the Skanska Costain STRABAG joint venture, is delivering full detailed design and construction of Phase One of the UK’s new high-speed railway in the southern section of the overall High Speed Two (HS2) project.  

The contract involves the construction of major tunnels in the approach to the London terminus at Euston station. This will contribute towards HS2’s goals to improve connectivity across the country, help the UK reach net-zero carbon emissions by 2050 and provide more capacity for the rail network. 

HS2 will provide 345 miles of new, high-speed track and is expected to carry more than 300,000 passengers a day when fully operational. 

Full Phase One services from Euston are forecast to start by 2036 and represent the largest investment in the area for decades.  

The HS2 Main Works package is valued to Skanska at £1.3bn, making it the third highest value project in Skanska’s portfolio globally.  

Delivering complex high speed rail infrastructure  

Following the Government’s approval to start HS2’s Main Works Phase One in April 2020, our Skanska Costain STRABAG joint venture team began the works on three sites at Euston, Old Oak Common and West Ruislip, constructing major tunnels in the approach to the London terminus at Euston station of the Phase One route.  

The route length being delivered by the joint venture covers just over 26km, with 21km (13 miles) taken up by the tunnelling operations, presenting a complex engineering and logistical challenge, particularly due difficult ground conditions. Seven separate tunnel boring machines (TBMs) will be deployed on this part of the HS2 route. 

Working on the biggest infrastructure project in Europe, we have the opportunity to develop and implement new construction techniques that deliver a step-change and long-lasting benefits for our industry. This includes our approach to driving down carbon that supports government targets and our own ambition to be net-zero carbon by 2045. 

Through our work on the London tunnels as part of the Skanska Costain STRABAG JV, we are developing and implementing solutions that cut carbon and deliver wider societal benefits – including cost reduction, improved safety and quicker delivery. 

Leaving a lasting legacy  

Creating a lasting legacy in the areas where we operate is a priority for our project team, as we continue to help HS2 to build the skills base needed to deliver Britain’s future infrastructure ambitions 

Our expert teams employ around 4,800 people, and many thousands more in the supply chain. This includes people from local communities, with more than 300 brought in through training and employment schemes that have helped those who were previously homeless, long-term unemployed or vulnerable for other reasons. 

Working with seven separate London boroughs across the HS2 route into Londonwe’re supporting a range of initiatives as part of the Empowering Communities 10-year legacy partnership to boost local economic growth, jobs opportunities, and community cohesion, ensuring that these areas can benefit long after the project has completed.  

Working together with our partners and supply chain we’re also supporting work experience and curriculum focused activities in schools. This helps to ensure that local communities are well placed to benefit from opportunities the project will create over the next two decadeswhile supporting HS2 in building the skills base needed to deliver Britain’s future infrastructure ambitions.  


Service: Construction
Mark segment: Railways
Start date: 2018
Completion date: 2036
Clients: HS2 Ltd
Country: United Kingdom
City: London
Project status: Ongoing