Engineering work is taking place between Briton Ferry and Swansea, closing all lines.
Great Western Railway:
Buses will replace trains between Swansea and Port Talbot Parkway.
An amended train service will run between Carmarthen and Swansea, and between Port Talbot Parkway / Cardiff Central / Newport and London Paddington.
Transport for Wales:
It is not yet known how Transport for Wales will be affected by this engineering work.
Check before you travel:
These changes are not currently shown in the National Rail Enquiries Journey Planner, please check back nearer to the time of travel.
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.