Engineering work is taking place until 09:40 in the Hertford North area, closing all lines.
Until approximately 09:40 on Sunday, buses replace trains between Finsbury Park and Stevenage via Hertford North.
Additionally, until approximately 06:05, buses replace trains between London Kings Cross and Finsbury Park.
Check before you travel:
You can plan your journey using the National Rail Enquiries 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.