The work will affect trains on both Saturday (December 15) and Sunday (December 16).
We have compiled all the details on these works so that you can plan your journey this weekend.
Saturday and Sunday (December 14 and December 15)
Engineering work is taking place between Clapham Junction or Shepherd’s Bush and Watford Junction, closing all lines.
From 8pm on Saturday evening until end of service, and from 9am until 12pm and from 9pm until the end of service on Sunday, no Southern trains will run between Shepherd’s Bush and Watford Junction.
From the start of service until 9am, no Southern trains will run between Clapham Junction and Watford Junction.
Sunday (December 15)
Engineering work is taking place between Wimbledon and Leatherhead, closing all lines.
All day on Sunday, buses will replace trains between Sutton and Epsom or Dorking.
Engineering work is taking place between Three Bridges and Horsham, closing all lines.
All day on Sunday, buses will replace trains between Three Bridges and Horsham.
An amended train service will run between Horsham and Bognor Regis.
Trains between London Victoria and Littlehampton will split towards Worthing, with part of the train running to and from Portsmouth Harbour before rejoining at Worthing.
The Portsmouth Harbour service will stop additionally at Three Bridges.
A reduced service will run between Barnham and Bognor Regis.
Engineering work is taking place between Polegate, Eastbourne and Hastings, closing all lines.
All day on Sunday, no Southern trains will run between Polegate, Eastbourne and Hastings or Ore.
Replacement bus services will run between Eastbourne and Ore via Polegate.
Trains usually running between Eastbourne and Ashford International will run between Hastings and Ashford International only.
Services between London Victoria, Brighton and Hastings or Ore will run between London Victoria or Brighton and Polegate only.
Journey times will be increased on replacement buses.
