Engineering work is taking place overnight in the Newport area, closing some lines.
The following services will be retimed:
Monday to Thursday
The 19:30 and 20:30 Manchester Piccadilly to Cardiff Central services will arrive into Cardiff Central later than usual.
Tuesday to Friday
The 04:33 Cardiff Central to Manchester Piccadilly service will depart earlier than usual at 04:20.
Check before you travel:
You can plan your journey using the National Rail Enquiries Journey Planner