Engineering work is taking place between Cambridge Heath and Cheshunt, closing all lines via Seven Sisters overnight from Tuesday evening until Friday morning.
Between 23:35 and 05:15 each night, no trains will run via Seven Sisters. These trains will run via Tottenham Hale instead.
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