Engineering work is taking place in the Stevenage area, closing some lines.
Trains between Brighton / London Kings Cross and Cambridge / Kings Lynn / Peterborough will run to a revised service and divert non-stop via Hertford North, with extended journey times.
A shuttle train service will run between Stevenage and Cambridge, calling at all stations.
A revised service will run between Moorgate and Alexandra Palace / Hertford North / Potters Bar.
Your tickets will also be accepted at no extra cost on Greater Anglia trains between Hertford East / Enfield Town and London Liverpool Street.
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.