No trains will be run to and from Sutton this Sunday (March 16).
Trains in the Croydon area will also be affected.
We have compiled the details for you to plan your journey this weekend.
Sunday (March 16):
Engineering work is taking place in Sutton area, closing all lines.
Buses will replace trains between Streatham and Sutton and Epsom, and between West Croydon and Sutton and Epsom Downs.
Trains will run between Epsom and Dorking.
Engineering work is also taking place between East Croydon and Purley, closing some lines on Sunday.
Trains will run to an amended and reduced timetable between East Croydon and Purley.
Trains between London Bridge and East Croydon via Peckham Rye will be extended to run to and from Caterham.
A separate train service will run between Purley and Tattenham Corner.
Trains between London Victoria and Reigate will be amended to run between Reigate and Redhill only.
Passengers can use alternative Southern or Thameslink trains for travel between Redhill and London.
Trains between Redhill and Tonbridge will also run to an amended timetable.