Brighton Main Line

The Brighton Main Line (also known as the South Central Main Line) is a major railway line in the United Kingdom that links Brighton, on the south coast of England, with central London. In London the line has two branches, out of London Victoria and London Bridge stations respectively, which join up in Croydon and continue towards Brighton as one line. The line is electrified throughout using the third rail system.

Aside from London and Brighton themselves, the line serves multiple large urban areas along its route, including Redhill, eastern Crawley, Haywards Heath and Burgess Hill. It also serves the major London suburbs of south-west Battersea, Balham, Streatham, Croydon and Purley, as well as London Gatwick Airport – the second-busiest passenger airport in the country.

In addition, the line operates as a "trunk" route for both mainline and suburban services all across Sussex, east Surrey and the southern boroughs of London. Towns such as Sutton, Epsom, Caterham, Reigate, East Grinstead, Eastbourne, Horsham, Hove, Worthing, Littlehampton, Bognor Regis and Chichester do not lie directly on the line, but are instead linked to London by means of a railway line that connects onto the Brighton Main Line.