Engineering work is taking place between Cardiff Central and Newport, resulting in the closure of some lines.
Trains between Cardiff Central and Taunton will now operate between Bristol Temple Meads and Taunton only.
Some trains between Cardiff Central and Portsmouth Harbour will call additionally at Severn Tunnel Junction and Patchway.
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.