The electrification of the last London Overground route is nearing completion following five months of engineering work to lower 1,700m of track between Gospel Oak and Barking.
The tracks need to be lowered to accommodate masts that will carry overhead wires to power new electric trains.
The timelapse video shows some of the work carried out on the 22.5km route. Network Rail is delivering the project, and J Murphy & Sons is the main contractor.
In addition to lowering much of the track, the entirety of Walthamstow Queens Road Station needed to be lowered to accommodate the new trains, as well as the railway inside a Victorian tunnel.
Most of the work was completed over the October half term to avoid disruption for local schools.
The £113M investment for the project has been funded jointly by the Department for Transport and Transport for London.
“At 80% complete, it won’t be long until the last diesel operated London Overground route is electrified, helping to meet growing passenger demand as part of our Railway Upgrade Plan,” said Network Rail’s route managing director for Anglia Richard Schofield.
“We’re now focused on installing the overhead line and power switching stations so that we can reopen the route next year.”