Southern Railway

The Southern Railway was one of the Big Four railway companies created after the 1921 Grouping, the others were the London, Midland & Scottish Railway, London North Eastern Railway and the Great Western Railway. The Southern Railway ran services out of the Major London Terminals of London Waterloo, London Victoria, London Bridge, London Charing Cross and London Cannon Street.

Diversions

The Southern Railway operated three diversions which were South West which was basically the London & South Western Railway routes, South Central which were basically the London Brighton & South Coast Railway routes and the South Eastern which was the South Eastern Railway

South Western

South Central

South Eastern

Electrification

The Southern Railway unusually for the Big Four went on a long electrification drive. The Southern Railway initially had two electrification systems which was the 6.7kV AC OLE from the London Brighton & South Coast Railway and the 660V DC Third Rail system from the London & South Western Railway.

6.7kV AC OLE

The 6.7kV AC OLE system covered a milage of . This system could be found on the Brighton Main Line and the South London Line.