 The Shenfield to Southend Victoria line was electrified using 1.5 kV DC overhead line electrification (OLE) on 31 December 1956.This was changed to 6.25 kV AC in November 1960 and to 25 kV AC on 25 January 1979.Platforms 1 and 4 were electrified when the Southminster branch was electrified on 12 May 1986.