Network Rail installs 11,000 tonne railway tunnel that weighs more than the Eiffel Towel

An 11,000 tonne curved concrete box has been pushed under the East Coast Main Line near Peterborough, in a first for UK engineering.

Over the past nine days, Network Rail teams reached this major milestone in the project to build a new tunnel at Werrington, north of Peterborough, which will enable slower moving freight trains to dive underneath the passenger route and use an adjacent line northwards.

Credit: Network Rail