A fault on a train between Watford Junction and St Albans Abbey means the line between these stations is closed.
As a result, trains will be cancelled or revised.
This is expected until 09:00.
Customer Advice:
You can use your ticket, at no extra cost, on the Arriva 321 bus service.
Rail replacement transport has been requested but not yet confirmed.
Check before you travel:
You can check your journey using the National Rail Enquiries real-time Journey Planner.
Compensation:
You may be entitled to compensation if you experience a delay in completing your journey today. Please keep your train ticket and make a note of your journey, as both will be required to support any claim.