Engineering work is taking place between St Denys and Fareham, closing some lines.
As a result, the 21:21 Bristol Parkway to Portsmouth Harbour service divert between Southampton Central and Fareham, calling additionally at Southampton Airport Parkwayand Eastleigh.
This service will run to a revised timetable.
Check before you travel:
You can plan your journey using the National Rail Enquiries Journey Planner