Engineering work is taking place in the London Liverpool Street area, closing some lines before 09:50.
Before 09:50, Stansted Express services will be diverted to run via Tottenham Hale and Stratford (London), extending journey times by up to 10 minutes. Trains will be retimed to run up to 10 minutes earlier or later than usual.
Check before you travel:
You can plan your journey using the National Rail Enquiries Journey Planner.