To the east of the station, the lines for Southend diverge to the south. West of Shenfield there are five tracks, but to the east these split, two towards and two towards . The London and North Eastern Railway opened the Southend Loop to the east of the station on 1 January 1934. This enabled Southend trains to and from platforms 4 and 5 to dive-under the main line thus eliminating conflicting movements. The bi-directional loop line connects to the Southend line at Mountnessing Junction.