Engineering work is taking place between Fareham and Portsmouth Harbour, closing some lines.
Trains between Cardiff Central/Bristol Temple Meads and Portsmouth Harbour will run between Cardiff Central and Fareham.
A replacement bus service will run between Fareham and Portsmouth Harbour calling at, Cosham (until 20:08), Fratton, Portsmouth & Southsea.
Buses will replace trains between:
Southern have yet to confirm how they are affected by these works.
If you are travelling with Great Western Railway or South Western Railway, you can plan your journey using the National Rail Journey Planner.
If you are travelling with Southern, these changes are not currently shown in the National Rail Journey Planner, please check back nearer to the time of travel.
For helpful advice if you need to travel on a rail replacement service, including accessibility and bicycle information, please use our Rail Replacement Services page.
You can find the pick-up and drop-off location of rail replacement services by checking station signage or by searching for your station on our Find a Station page.
Please be advised that replacement vehicles may be busier than usual, and you should allow extra time for your journey.