The changes are due to engineering work and will affect trains on both Saturday and Sunday (July 12 and July 13).
We have outlined and simplified the details so you can plan your journey this weekend.
Saturday and Sunday (July 12 and July 13):
Engineering work is taking place between Shepherds Bush and Watford Junction, closing some lines.
After 9pm on Saturday, no Southern trains will run between Shepherds Bush and Watford Junction.
On Sunday, no Southern trains will run between Clapham Junction and Watford Junction.
Sunday (July 13):
On Sunday, no trains will run between East Croydon and Gatwick Airport.
A direct, but diverted Southern train service will run, with extended journey times, between London Victoria and Gatwick Airport, calling at Clapham Junction only.
Trains will run between London Victoria and East Grinstead to an amended timetable, connecting with direct buses between East Grinstead and Gatwick Airport and Three Bridges.
Trains will run between Gatwick Airport and Bognor Regis and Portsmouth Harbour.
Trains will run between Three Bridges and Littlehampton and between Three Bridges and Eastbourne, Hastings, and Ore.
Trains between London Victoria and East Grinstead will be amended to run between London Bridge and East Grinstead.
A reduced number of trains will run between London Victoria and East Croydon.
No direct trains will run between London Victoria and Reigate.
Passengers can use Great Western Railway trains to travel between Redhill and Reigate.
Replacement buses will run between:
- East Grinstead and Gatwick Airport (frequent)
- East Grinstead and Three Bridges (frequent)
- East Croydon and Redhill (limited)
- Redhill and Gatwick Airport (limited)
- Redhill and Tonbridge
- East Croydon and Tattenham Corner
Engineering work is taking place between Balham and Norwood Junction, closing some lines.
At the end of Saturday service, the 12.40am train from London Victoria to Norwood Junction will not run.
A replacement bus will run from London Victoria to Norwood Junction via Streatham Hill.
Journey times will be increased when using replacement buses.
The weather is expected to reach the early 30s this weekend, and all passengers are advised to travel with a bottle of water.
Passengers should not board the train if they are feeling unwell.
