Great Northern services operate to or from London King's Cross and Moorgate in London. Destinations include Hertford North, Welwyn Garden City, Stevenage, Peterborough, Cambridge and King's Lynn. Services run through parts of Greater London, Hertfordshire, Bedfordshire, Cambridgeshire and Norfolk all the way down. 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 south of London.