A fault with the signalling system between Stroud and Kemble means that trains have to run at a reduced speed. Trains running between Gloucester and Swindon may be delayed by up to 15 minutes.
Disruption is expected until 11:45.
Further information:
Network Rail have specialist staff heading to site to investigate and fix the failure.
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.