A fault with the signalling system between Princes Risborough and Aylesbury means that all lines between these stations are currently closed.
As a result, trains running between these stations may be cancelled or delayed by up to 30 minutes.
This is expected until 13:00.
Customer advice:
Rail replacement transport has been requested to operate between Risborough and Aylesbury, calling at Monks Risborough and Little Kimble. You will be updated here once this is 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.