The work will affect trains from March 3 to March 7.
We have compiled all the details on these works so that you can plan your journey this week.
Engineering work is taking place overnight between London Bridge and East Croydon, closing some lines.
Monday, Tuesday and Thursday (March 3, March 4, and March 6):
The 11.58pm train from London Bridge to Streatham Hill train will not run.
A replacement bus will run from London Bridge, departing at 11.58pm, and run to Streatham Hill via Sydenham, calling at normal stations.
Tuesday, Wednesday and Friday (March 4, March 5, and March 7):
The 12.35am train from London Bridge to East Croydon will be diverted and will only call at Norwood Junction.
A replacement bus will run from London Bridge and East Croydon via Sydenham, departing at 12.35am.
Tuesday, Thursday and Friday (March 4, March 6, and March 7):
The 12.17am train London Bridge to Caterham will be diverted, calling at Norwood Junction and terminate at East Croydon.
A replacement bus will run from East Croydon calling at stations to Caterham.
The 12.18am train Purley to Tattenham Corner will not run.
A replacement bus will run from Purley calling at stations to Tattenham Corner.
