Engineering work is taking place between St Albans City and London Blackfriars, closing some lines.
A reduced service will run between St Alabans City and London Blackfriars.
Trains which usually run between St Albans City and Sutton via Mitcham Junction will only run between London Blackfriars and Sutton.
Early Sunday morning services which usually run between London Bridge and Sutton will instead start from London Blackfriars. Your tickets will be accepted on Southern services to reach your destination.
Check before you travel:
You can plan your journey using the National Rail Enquiries Journey Planner