Engineering work is taking place early on Sunday morning between London Liverpool Street and Cheshunt, closing some lines.
Until 08:15, Greater Anglia and Stansted Express services that run between London Liverpool Street and Cheshunt will divert via Tottenham Hale and Stratford to and from London Liverpool Street. Journey times will be extended in both directions by up to 10 minutes.
Trains on these affected routes will depart London Liverpool Street up to 10 minutes earlier than normal.
Check before you travel:
You can plan your journey using the National Rail Enquiries Journey Planner