Great Northern route

The Great Northern route, formerly known as Great Northern Electrics, is a suburban rail route in London and the East of England. The route consists of services on the southern end of the East Coast Main Line, which is the main railway link between the cities of London and Edinburgh, as well as its associated branches, including the Cambridge line, Fen line, Hertford loop line, and Northern City Line.

The route is currently operated by Great Northern, which is one brand under the umbrella of Govia Thameslink Railway. Services originating at London King's Cross operate to Peterborough, Letchworth, Cambridge, Ely, and Kings Lynn, whereas services originating at Moorgate operate to Welwyn, Hertford North, Gordon Hill, and Stevenage.

The route forms a major commuter route into London from Hertfordshire, Cambridgeshire, and eastern Bedfordshire: ridership has grown rapidly over recent years. In 2009, rolling stock was transferred from other lines to allow additional services and longer trains to be run. In early 2018, the line was connected to the Thameslink route via a junction just south of the High Speed 1 bridge, north of King's Cross, allowing through services to the south of London.

Since September 2014, the services have been operated by Govia Thameslink Railway (GTR). The Thameslink and Great Northern service brands were maintained and separated from each other.