A fault with the signalling system between Bath Spa and Trowbridge means that all lines are blocked.
As a result, trains running between these stations may be delayed by up to 20 minutes or cancelled.
Disruption is expected until 14:45.
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.