Stanton Precast to construct green tunnels for HS2, UK December 1, 2021 | Europe News Stanton Precast has secured a contract to construct three green tunnels for the high-speed rail (HSR) project HS2 in the UK. The tunnels will include ‘porous portals’ to minimise the noise... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password