Engineering work is taking place between Welwyn Garden City and Stevenage, closing all lines on Wednesday and Thursday nights.
Between approximately 23:10 on Wednesday and Thursday evenings until approximately 05:10 on Thursday and Friday mornings, no trains will run between Welwyn Garden City and Stevenage.
A revised train service will run between London Kings Cross and Welwyn Garden City.
Rail replacement buses will run between Finsbury Park / Alexandra Palace and Stevenage via Welwyn Garden City.
Trains between London and Cambridge / Kings Lynn / Peterborough will divert to run non-stop via Hertford North, with extended journey times.
Check before you travel:
You can plan your journey using the National Rail 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.