The Hertford Loop is a branch of the East Coast Main Line.

First Capital Connect operate suburban services along the East Coast Main Line south of Peterborough. Trains run along the Herford Loop between Kings Cross or Moorgate and Letchworth, Stevenage or Hertford North. Occasionally, GNER trains operate non-stop along the route when diverted off the main section of the ECML due to engineering work.

This route is electrified at 25 kV AC.

Route and Settlements served

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Heading south, the Hertford Loop begins just south of Stevenage. It serves:

• Watton-at-Stone railway station - village of Watton-at-Stone

• Hertford North_railway_station - town of Hertford

• Bayford_railway_station - villages of Bayford and Brickendon

• Cuffley_railway_station - villages of Cuffley, Northaw and Goffs Oak

• Crews_Hill_railway_station - village of Crews Hill

• Gordon_Hill_railway_station - northern area of Enfield

• Enfield Chase_railway_station - Enfield Town

• Grange_Park_railway_station - Grange Park

• Winchmore_Hill_railway_station - Winchmore Hill

• Palmers_Green_railway_station - Palmers Green

• Bowes_Park_railway_station - Bowes Park and Wood Green

before rejoining the main line north of Alexandra Palace