Improvement works to the Great Eastern Main Line have been completed in advance of the introduction of Elizabeth Line trains between Liverpool Street and Shenfield.
In preparation for the new service, additional capacity has been added to the railway at Shenfield when the line extends extends from Essex and through the central tunnels in 2019.
The improvements will also allow the introduction of new trains for TfL (Transport for London) Rail services later this month.
Among the improvements a new dedicated Elizabeth Line platform (Platform 6) has been built as well as an extended Platform 5. Three new sidings at Shenfield each capable of accommodating the new trains have also been built.
The new trains will feature air-conditioning and three double-doors per carriage.
At Shenfield rail junction, the track, signals and overhead power lines have also been improved to allow trains to pass through without having to wait for other trains to pass through.
In total, Network Rail said over 5,000m of new track and 26 new track switches had been laid as part of the junction remodelling works to improve rail operation. In addition, over 200 new overhead line structures have been installed supporting 21,000m of new overhead power lines with auto tension systems to reduce heat related speed restrictions.
TfL rail operations director Howard Smith said: “The new platform and other works at Shenfield station will benefit both regular commuters and those travelling further afield. This marks another milestone in the delivery of the new railway.
“Our customers using TfL Rail will be the first to use our new trains, which will travel between Shenfield and Liverpool Street in preparation for Elizabeth line services in December 2018.”