Giant HS2 viaduct deck slide breaks records: Video

HS2 has released new timelapse footage showing engineers completing the heaviest and longest single-stage viaduct deck slide on the project so far.
The four-day operation – which was completed on Sunday – involved sliding the 4,500 tonne deck across a road and railway line near Wendover in Buckinghamshire.
Stretching for 345m, the Small Dean viaduct is one of 50 major viaducts on the HS2 project.Its concrete and steel deck was assembled to its full length before the slide began with