Alkmaar–Den Helder/Hoorn, 9 to 13 November; Heerhugowaard–Den Helder, 14 to 20 November

Engineering work has altered the timetable between Alkmaar and Den Helder and between Alkmaar and Hoorn from Monday 9 November to Friday 13 November 2026. Train services on the Heerhugowaard–Den Helder route are altered from Saturday 14 November to Friday 20 November 2026.