Engineering work is taking place between Newport and Ebbw Vale Town, closing all lines before 13:00 on Sunday.
Before 13:00, buses will replace trains between Cardiff Central and Ebbw Vale Town.
The first train to run will be the 13:08 Cardiff Central to Ebbw Vale Town service.
Check before you travel:
You can plan your journey using the National Rail Enquiries Journey Planner
Replacement Bus Travel Advice:
For helpful advice if you need to travel on a rail replacement service, including accessibility information, please use our travel information pages.
You can find the location of your replacement bus by checking station signs or by searching for your station on our station information pages.
Please be advised that replacement vehicles may be busier than usual, and you should allow extra time for your journey.