Engineering work is taking place between Waltham Cross and Hertford East / Stansted Airport, closing all lines.
All weekend, buses will replace trains between Waltham Cross and Hertford East / Stansted Airport.
A reduced Greater Anglia train service (every 30 minutes) will continue to run between London Liverpool Street / Stratford and Waltham Cross, and between Stansted Airport and Cambridge.
You can use your tickets at no extra cost on Great Northern / Thameslink services between London Kings Cross and Cambridge.
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.