Engineering work is taking place between Streatham and Sutton, closing all lines overnight from Monday evening until Friday morning.
After 23:50 each night, Thameslink trains will not run between Herne Hill and Sutton.
You can use your tickets on London Buses between Herne Hill and Sutton.
Additionally, Thameslink overnight services between Bedford and Three Bridges / Brighton will be diverted to run via London Bridge (not calling).
Check before you travel:
You can plan your journey using the National Rail Enquiries Journey Planner
You can plan your journey on London Buses by using the Transport for London Journey Planner