We recently finished replacing the overhead wiring system between London Liverpool Street and Chelmsford on the Great Eastern Main Line and between Shenfield and Southend Victoria on the Southend Victoria branch line.

Stratford renewals

The overhead wiring system at Stratford was not completed during this time because of the complexity of the junction. This work is planned to take place at Christmas this year.

The work involves replacing the entire wiring system which includes the wires themselves, some of the masts and the components. The new system adapts to heat, pulling the wires taut to avoid them sagging.

The work includes installing eight new structures and completing 19 wire runs.

Why are overhead wires important?

Wires provide the power for electric trains to run. The train has an arm called a pantograph which draws the power from the wires. When the wires sag, which typically happens when the weather is hot, the arm can get caught in the wires and rip them down. To avoid this happening, speed restrictions are imposed, which leads to delays and cancellations. The new wiring system prevents the wires from sagging which means fewer speed restrictions and fewer delays and cancellations.

Contact us about our OLE renewals programme

If you’re interested in finding out more about our programme to replace overhead wires, please contact us by visiting our contact us page or by calling our 24-hour national helpline on 03457 11 41 41.