Engineering work is taking place between Cambridge Heath and Cheshunt, closing all lines via Tottenham Hale overnight from Monday evening until Friday morning.
Between 23:20 and 05:00 each night, train services which normally run via Tottenham Hale, will be diverted to run via Seven Sisters.
Stations on the Tottenham Hale line are only a short distance from those on the Seven Sisters line. You can view maps that show routes between these stations on the Greater Anglia website.
Check before you travel:
You can plan your journey using the National Rail Enquiries Journey Planner