Engineering work is taking place between Stevenage and Welwyn Garden City until 08:20, closing some lines.
Until approximately 08:20 on Sunday morning, trains towards London will be unable to call at Hornsey or Harringay.
You should change at Finsbury Park for a northbound train to Harringay and Hornsey or alternatively travel north from Harringay and Hornsey to Alexandra Palace for a train towards London.
Check before you travel:
You can plan your journey using the National Rail Enquiries Journey Planner