Grimshaw has revealed designs for the first of four vent shaft head houses for HS2’s 10-mile-long Chiltern tunnel.

The Chalfont St Peter facility in Buckinghamshire will house a 60m shaft providing ventilation and emergency access to the twin bore tunnels below, the longest and deepest tunnels on the route. Landscape architects LDA were also on the design team.

Consultations with residents and local groups have resulted in a barn-like building designed to mimic local agricultural buildings.

…