The East Coast Main Line (ECML) is a 393-mile long (632 km) electrified railway between its southern terminus at London King's Cross station and Edinburgh Waverley via Peterborough, Doncaster, York, Darlington, Durham and Newcastle. The line is a key transport artery on the eastern side of Great Britain running broadly parallel to the A1 road. The main line acts as a 'spine' for several diverging branches, serving destinations such as Cambridge, Leeds, Hull, Sunderland and Lincoln, all with direct services to London. In addition, a few ECML services extend beyond Edinburgh to serve Glasgow Central, although the principal London-Glasgow route is the West Coast Main Line (WCML).

Peterborough railway station serves the cathedral city of Peterborough, Cambridgeshire, England. It is sited 76 miles 29 chains (122.9 km) north of London King's Cross. The station is a major interchange serving both the north–south East Coast Main Line, as well as long-distance and local east–west services. The station is managed by London North Eastern Railway. Ticket gates came into use at the station in 2012.