watford is served by three railway stations and a london underground station. is on the west coast main line with trains from to the midlands, the northwest and scotland. the station is mainly served by frequent suburban and regional trains operated by west midlands trains which run to and milton keynes and the cross-london southern service to via . two all-stations services terminate at watford junction: the suburban service operated by london overground which runs to euston; and the abbey line shuttle service to . watford north is the first stop.