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 use cuttings and green bridges to reduce the visual impact, and our landscape design helps protect the countryside.
What we’re building
In South Bucks to Aylesbury
Chiltern tunnelThe Chiltern tunnel is the longest tunnel on the HS2 route, stretching 10 miles (16km) beneath the Chiltern Hills.
Five headhouses support the Chiltern tunnel. They ventilate the tunnel and provide emergency access.
Each site has a secure compound with a main headhouse building and smaller structures. Most of each building sits below ground, keeping the visible parts small. We designed each headhouse to fit its surroundings in the Chilterns National Landscape, working closely with local communities.
Four headhouses – at Chalfont St Peter, Chalfont St Giles, Little Missenden and Chesham Road – sit in the rural Chilterns National Landscape. We designed them as a family of buildings that reflect local farm buildings. They have simple pitched roofs and compounds arranged like farmyard courtyards.
The buildings use simple, long-lasting materials, wrapped in weathered zinc with ventilation openings and painted in colours that suit each location.
We’re keeping as much existing vegetation as possible at each site. We’re planting native species to create habitats and improve biodiversity. This includes species-rich grassland typical of the Chilterns, new hedgerows, and trees that help wildlife move through the landscape.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Chilterns chalk grasslandThe western slopes of the River Colne valley are dedicated habitat creation sites. We’re creating more than 90 hectares of chalk grassland alongside new woodland, wood pasture and wetlands – including almost 65,000 trees and shrubs of 32 species and nearly 2 miles (3.5km) of new hedgerows.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Chiltern tunnel (north portal)Chiltern tunnel (north portal)
We’ve designed the north portal building to provide air pressure and noise relief for the Chiltern tunnel.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Wendover Dean viaductWe’re building the Wendover Dean viaduct south of Wendover, Buckinghamshire.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Small Dean viaductThe Small Dean viaduct is 345m long and sits just south of Wendover, Buckinghamshire.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Wendover tunnelWe’re building the Wendover tunnel for almost a mile (1.4km) past the town of Wendover, alongside the existing railway and A413.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Thame Valley viaductWe’re building the Thame Valley viaduct in the northern vale, crossing the low-lying Thame Valley.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
The Chiltern tunnel is the longest tunnel on the HS2 route, stretching 10 miles (16km) beneath the Chiltern Hills.
Five headhouses support the Chiltern tunnel. They ventilate the tunnel and provide emergency access.
Each site has a secure compound with a main headhouse building and smaller structures. Most of each building sits below ground, keeping the visible parts small. We designed each headhouse to fit its surroundings in the Chilterns National Landscape, working closely with local communities.
Four headhouses – at Chalfont St Peter, Chalfont St Giles, Little Missenden and Chesham Road – sit in the rural Chilterns National Landscape. We designed them as a family of buildings that reflect local farm buildings. They have simple pitched roofs and compounds arranged like farmyard courtyards.
The buildings use simple, long-lasting materials, wrapped in weathered zinc with ventilation openings and painted in colours that suit each location.
We’re keeping as much existing vegetation as possible at each site. We’re planting native species to create habitats and improve biodiversity. This includes species-rich grassland typical of the Chilterns, new hedgerows, and trees that help wildlife move through the landscape.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
The western slopes of the River Colne valley are dedicated habitat creation sites. We’re creating more than 90 hectares of chalk grassland alongside new woodland, wood pasture and wetlands – including almost 65,000 trees and shrubs of 32 species and nearly 2 miles (3.5km) of new hedgerows.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Chiltern tunnel (north portal)Chiltern tunnel (north portal)
We’ve designed the north portal building to provide air pressure and noise relief for the Chiltern tunnel.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Wendover Dean viaductWe’re building the Wendover Dean viaduct south of Wendover, Buckinghamshire.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Small Dean viaductThe Small Dean viaduct is 345m long and sits just south of Wendover, Buckinghamshire.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Wendover tunnelWe’re building the Wendover tunnel for almost a mile (1.4km) past the town of Wendover, alongside the existing railway and A413.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Thame Valley viaductWe’re building the Thame Valley viaduct in the northern vale, crossing the low-lying Thame Valley.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Chiltern tunnel (north portal)
We’ve designed the north portal building to provide air pressure and noise relief for the Chiltern tunnel.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
We’re building the Wendover Dean viaduct south of Wendover, Buckinghamshire.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Small Dean viaductThe Small Dean viaduct is 345m long and sits just south of Wendover, Buckinghamshire.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Wendover tunnelWe’re building the Wendover tunnel for almost a mile (1.4km) past the town of Wendover, alongside the existing railway and A413.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Thame Valley viaductWe’re building the Thame Valley viaduct in the northern vale, crossing the low-lying Thame Valley.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
The Small Dean viaduct is 345m long and sits just south of Wendover, Buckinghamshire.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
We’re building the Wendover tunnel for almost a mile (1.4km) past the town of Wendover, alongside the existing railway and A413.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Thame Valley viaductWe’re building the Thame Valley viaduct in the northern vale, crossing the low-lying Thame Valley.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
We’re building the Thame Valley viaduct in the northern vale, crossing the low-lying Thame Valley.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
In Calvert
Calvert infrastructure maintenance depotThe Calvert depot will help keep HS2 running safely and efficiently.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Sheephouse Wood bat protection structureWe’re building a bat protection structure alongside Sheephouse Wood, Buckinghamshire. It will run for about 1km.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
The Calvert depot will help keep HS2 running safely and efficiently.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
We’re building a bat protection structure alongside Sheephouse Wood, Buckinghamshire. It will run for about 1km.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
In North Bucks to Turweston
Westbury viaductWe’re building the Westbury viaduct over the floodplain of the River Great Ouse.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
Turweston bridgeWe’re building a 99m wide green bridge near Turweston. It’s the largest green bridge on the HS2 route.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
We’re building the Westbury viaduct over the floodplain of the River Great Ouse.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
We’re building a 99m wide green bridge near Turweston. It’s the largest green bridge on the HS2 route.
Read about the HS2 works and developments taking place in Buckinghamshire and Oxfordshire
How we manage construction
We work to minimise disruption for residents and businesses, reduce the impact on roads and transport, protect the environment, and keep communities informed at every stage.
Current work in the area
HS2 works near you
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