Woodsmith Mine Tunnel

The Woodsmith Mine Tunnel (also known as a Mineral Transport System [MTS]) is a 23-mile (37 km) long tunnel that will stretch between Woodsmith Mine at Sneatonthorpe near Whitby in North Yorkshire and the Wilton International complex on Teesside, England. The tunnel has been in development since 2016, but cutting of the tunnel bore did not start until April 2019, with an original projected completion date of 2021, now projected to 2030. By December 2025 tunnelling had advanced 19 miles (30 km), 81% complete. When finished, the tunnel will be the longest tunnel in the United Kingdom and will also house the longest conveyor in the UK. The estimated cost of the tunnel in November 2018 was £1.1 billion.

Wikipedia ↗

Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).

Other tunnels in United Kingdom

Delaware Aqueduct United States · 137 km Päijänne Water Tunnel Finland · 120 km Orange–Fish River Tunnel South Africa · 82.8 km Ishikawa Tunnel Japan · 78.5 km Brenner Base Tunnel Austria · 64 km Mont d'Ambin base tunnel France · 57.5 km Gotthard Base Tunnel Switzerland · 57.09 km Hong Kong–Zhuhai–Macau Bridge China · 55 km