Engineering work is taking place between Fareham and Portsmouth Harbour, closing all lines very early on Monday morning.
As a result, the 04:50 Fratton to Bristol Temple Meads will start from Fareham at 05:10.
If you are travelling from Fratton, Cosham or Portchester, you should travel by later services.
Check before you travel:
You can plan your journey using the National Rail Enquiries Journey Planner