HS2 in Buckinghamshire and Oxfordshire
HS2 in your area
We’re building long tunnels beneath the Chilterns. The railway then runs north across Buckinghamshire and Oxfordshire. We’re using cuttings and green bridges to reduce visual impact. Our landscape design protects the countryside.
What we're building in South Bucks to Aylesbury
Chiltern tunnel
Chiltern tunnel is the longest tunnel on the HS2 route, stretching 10 miles (16km) beneath the Chiltern Hills.
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Chiltern tunnel headhouses
Five headhouses will support the Chiltern tunnel. They ventilate the tunnels for the railway and provide emergency access.
Chalfont St Peter headhouse
The Chalfont St Peter headhouse design has been improved. The single-storey building is now set back from the road and wrapped in a simple grey zinc roof with dark bronze openings. Taking its inspiration from the style of local barns and other agricultural buildings, it’s designed to blend into the surrounding landscape. The pre-weathered grey zinc roof will age naturally over time, without loss of robustness or quality, while the whole structure will sit on a simple dark blue brick base.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Chalfont St Giles headhouse
The Chalfont St Giles headhouse will fit into the surrounding landscape, taking inspiration from the style of local barns and other agricultural buildings. The design uses a simple range of materials inspired by local agricultural and industrial buildings. The building colour and detail blend into the landscape.
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Amersham headhouse
The Amersham headhouse sits in the middle of a road junction just outside Amersham, Buckinghamshire. The building design has changed based on feedback from Buckinghamshire Council. The weathered steel boundary wall is being replaced with a more traditional stone wall made of flint. Flint occurs naturally within chalk hills like the Chilterns. Flint facades have been a prominent feature of local architecture for hundreds of years.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Little Missenden headhouse
The Little Missenden headhouse is a single-storey building that will sit on top of a 35-metre deep ventilation shaft. The shaft reaches down to the Chiltern tunnel below. The headhouse is set back from the main A413 in Little Missenden.
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Chesham Road
The Chesham Road headhouse (intervention shaft) is located off the B485 at Hyde End, near Great Missenden. The arrangement of the buildings is based on an agricultural courtyard layout with the overall footprint of the compound kept to a minimum. Pitched roofs wrap around the buildings, creating simple agricultural barn forms.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Chiltern tunnel north portal ancillary building
We’ve designed the north portal building to provide air pressure and noise relief for the Chiltern tunnel.
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Wendover Dean viaduct
We’re building the Wendover Dean viaduct south of Wendover, Buckinghamshire.
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Small Dean viaduct
The 345m long Small Dean viaduct is just south of Wendover, Buckinghamshire.
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Wendover tunnel
We’re building he Wendover tunnel for almost a mile (1.4 km) past the town of Wendover alongside the existing railway and A413.
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Thame Valley viaduct
We’re building the Thame Valley viaduct in the Northern Vale. It crosses the low-lying Thame Valley.
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What we're building in Calvert
Calvert infrastructure maintenance depot
The Calvert depot will help keep HS2 running safely and efficiently.
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Sheephouse Wood bat protection structure
We’re building a bat protection structure alongside Sheephouse Wood, Buckinghamshire. It will run for about 1km.
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What we're building in North Bucks to Turweston
Westbury viaduct
We’re building the Westbury viaduct over the floodplain of the River Great Ouse.
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Turweston bridge
We’re building a 99m wide green bridge near Turweston. It’s the largest green bridge on the HS2 project.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Managing impacts of construction
We're working to minimise disruption to local residents and businesses, reduce the impact on roads and transport, minimise our impact on the environment, and keep communities informed at every stage.
Current work in the area
Local area information
We’re making sure HS2 provides the best value for Britain by carrying out a full review of the programme for the government.
Our CEO Mark Wild is resetting HS2’s cost and schedule. He successfully led Crossrail’s recovery in the wake of major challenges. This led to the successful opening of the Elizabeth line – now the busiest in the UK.
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