Some Southern trains will be cancelled, diverted or replaced by buses this week due to planned engineering work.
The work will affect trains from December 16 through to December 20.
We have compiled all the details on these works so that you can plan your journey this week.
Monday to Thursday (December 16 to December 19):
Engineering work is taking place between Ford and Chichester, closing some lines.
The 10.35pm train from London Victoria to Chichester train will be diverted to terminate at Littlehampton.
A replacement bus will run from Littlehampton to Chichester, calling at Ford, Barnham, Bognor Regis and Chichester.
Engineering work is taking place overnight between Oxted and East Grinstead and Crowborough, closing all lines.
From approximately 10.45pm until the end of service on Monday to Thursday evenings, buses will replace trains between Oxted and East Grinstead and between Oxted and Crowborough and Uckfield.
Journey times will be increased on replacement buses.
Engineering work is also taking place after 11.30pm until end of service between Redhill and Tonbridge, closing all lines.
From approximately 11.30pm until the end of service on Monday to Thursday evenings, replacement buses will run between Redhill and Tonbridge.
Journey times will be increased on replacement buses.
Engineering work is also taking place between Bognor Regis and Ford, closing some lines.
The 11.45pm train from Portsmouth Harbour to Bognor Regis will be diverted to terminate at Littlehampton, after calling at Barnham.
A replacement bus will run from Barnham to Bognor Regis.
Monday to Friday (December 16 to December 20):
Engineering work is taking place from 11.30pm each night (Monday to Friday) until end of service between Lewes and Seaford, closing all lines.
From approximately 11.30pm until the end of service on Monday to Friday evenings, replacement buses will run between Lewes and Seaford.
Journey times will be increased on replacement buses.