This is due to engineering work and will affect trains from Monday to Friday (January 19 to January 23).
We have broken down the full details so you can plan ahead this week.
Monday to Friday (January 19 to January 23):
Engineering work is taking place overnight between Brighton, Hove and Worthing, and West Worthing, ending Friday morning, closing some lines.
From approximately 11.30pm until the end of service on Monday to Thursday evenings, trains from London Victoria to Worthing will be diverted to terminate at Brighton.
Buses will replace trains between Brighton, Hove and Worthing, and West Worthing.
Additionally, the 10.52pm train from Portsmouth Harbour to Brighton will terminate at Littlehampton.
A replacement bus will run from Littlehampton to Brighton, calling at all stations.
Journey times will be increased when using replacement buses.
