This is due to engineering work, with several late-night trains replaced by buses across south east London and Kent.
We have broken down the details for you to plan ahead.
Tuesday (May 5):
From 12.30am until the end of service, trains between London Victoria and Orpington via Beckenham Junction will be diverted between London Victoria and Shortlands, stopping additionally at Denmark Hill.
Replacement buses will run between Denmark Hill and Orpington via Beckenham Junction, calling at all stations except Brixton.
Trains towards London Victoria will run non-stop between Shortlands and London Victoria. Change at Bromley South for a replacement bus via Beckenham Junction.
From 12.50am until the end of service, buses will replace trains between Sittingbourne and Faversham, Herne Bay and Ramsgate.
Teynham will not be served by these buses, with a minibus running between Sittingbourne and Faversham via Teynham.
From 11.10pm until the end of service, trains between London Victoria and Orpington via Beckenham Junction will be diverted between London Victoria and Shortlands, stopping additionally at Denmark Hill.
Replacement buses will run between Denmark Hill and Orpington via Beckenham Junction, calling at all stations except Brixton.
From 11.45pm until the end of service, trains between Bromley North and Grove Park will not run.
Passengers can use London Bus routes 126 and 261 at no extra cost.
Wednesday (May 6):
From 11.10pm until the end of service, trains between London Victoria and Orpington via Beckenham Junction will be diverted via Shortlands, stopping additionally at Denmark Hill.
Replacement buses will run between Denmark Hill and Orpington via Beckenham Junction, calling at all stations except Brixton.
The 11.20pm and 11.50pm London St Pancras International to Faversham services will be replaced by buses between Ebbsfleet International, Gillingham and Faversham, calling at all stations except Higham, Newington and Teynham.
The 10.10pm London Victoria to Dover Priory will leave Faversham earlier than usual and run non-stop to Dover Priory.
Replacement buses will run between Faversham and Dover Priory calling at Canterbury East only, and between Canterbury East and Kearsney calling at all stations.
A minibus will run between Faversham and Selling.
From 11.45pm until the end of service, buses will replace trains between Sittingbourne, Herne Bay and Ramsgate, with a minibus serving Teynham.
After 12.45am, the last train between London Cannon Street and Dartford via Bexleyheath will be diverted to Slade Green.
Thursday (May 7):
From 12.45am, the last train between London Cannon Street and Dartford via Bexleyheath will be diverted to Slade Green, connecting with a replacement bus to Dartford.
From 1.15am until the end of service, buses will replace trains between Slade Green and Dartford.
From 11.10pm until the end of service, trains between London Victoria and Orpington via Beckenham Junction will be diverted via Shortlands, stopping additionally at Denmark Hill.
Replacement buses will run between Denmark Hill and Orpington via Beckenham Junction, calling at all stations except Brixton.
From 11.45pm until the end of service, trains between Bromley North and Grove Park will not run.
Passengers can use London Bus routes 126 and 261 at no extra cost.
The 11.20pm and 11.50pm London St Pancras International to Faversham services will be replaced by buses between Ebbsfleet International, Gillingham and Faversham, calling at all stations except Higham, Newington and Teynham.
The 10.10pm London Victoria to Dover Priory will leave Faversham earlier than usual and run non-stop to Dover Priory.
Replacement buses will run between Faversham and Dover Priory calling at Canterbury East only, and between Canterbury East and Kearsney calling at all stations.
A minibus will run between Faversham and Selling.
From 11.45pm until the end of service, buses will replace trains between Sittingbourne, Herne Bay and Ramsgate, with a minibus serving Teynham.
Friday (May 8):
From 1.15am until the end of service, buses will replace trains between Slade Green and Dartford.
After 12.45am, the last train between London Cannon Street and Dartford via Bexleyheath will be diverted to Slade Green, connecting with a replacement bus to Dartford.
If you are travelling late at night, check before you travel and allow extra time as replacement buses will be in operation.
