Engineering work is taking place in the Alexandra Palace area until 09:40, closing some lines.
From the start of Sunday service until approximately 09:40, buses replace trains between Alexandra Palace and Stevenage via Hertford North.
Additionally, until approximately 08:10, no southbound trains can call at Alexandra Palace, Hornsey or Harringay.
Replacement buses will run between New Barnet and Finsbury Park, calling at Oakleigh Park, New Southgate and Alexandra Palace.
For Harringay and Hornsey, paper rail tickets will be accepted on London Buses at no extra cost.
Check before you travel:
You can plan your journey using the National Rail Enquiries Journey Planner.
You can plan your journey on London Buses by using the Transport for London Journey Planner.
Replacement bus travel advice:
For helpful advice if you need to travel on a rail replacement service, including accessibility and bicycle information, please use our Rail Replacement Services page.
You can find the pick-up and drop-off location of rail replacement services by checking station signage or by searching for your station on our Find a Station page.
Please be advised that replacement vehicles may be busier than usual, and you should allow extra time for your journey.