There will be no trains between Epsom and London Victoria this Sunday Southern Railway has warned.
The reason for this disruption is essential rail work which is being carried out near the London terminus.
Instead, the company is laying on replacement buses along the route.
Trains between Purley and Tattenham Corner will also be replaced with buses and journey times will be extended by up to 30 minutes.
Trains using London Bridge will also be affected.
Southern Railway is urging anyone considering travelling on Sunday, March 23, to consult its website