From today’s TFL’s weekend travel information email:
National Rail website is showing this is due to engineering work between Sydenham and Crystal Palace, which logically would usually also affect the Southern Railways London Bridge - Crystal Palace service via Sydenham that normally operates on Sundays. Although there is no mention of Southern being affected on the National Rail engineering works section no direct rail services are displaying on their journey planner! (It’s not unusual for discrepancies like this to occur and often are not updated until the day before travel!)
Also although not directly a local service for those needing to travel into Central London for on Sunday and expecting to change onto the Jubilee Line at Canada Water please note it will only be operating as far as Waterloo!