A fault with the signalling system between London Paddington and Southall means that trains have to run at a reduced speed on some lines. Trains running between these stations may be cancelled, delayed by up to 20 minutes or revised.
Disruption is expected until 15:00.
Check before you travel:
You can check your journey using the National Rail Enquiries real-time Journey Planner.
âââââââCompensation:
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.