
HS2 has started construction of the UK’s longest railway bridge.
The Colne Valley Viaduct will stretch for 2.1 miles (3.4km), carrying high-speed trains some 33ft (10m) above a series of lakes and waterways just outside north-west London.

HS2 has started construction of the UK’s longest railway bridge.
The Colne Valley Viaduct will stretch for 2.1 miles (3.4km), carrying high-speed trains some 33ft (10m) above a series of lakes and waterways just outside north-west London.