Provisional Christmas week timetables have been published up to Dec 26th.

Forest Hill and Honor Oak Park will have no Southern service from the 22nd December onwards. Windrush line services will operate throughout Christmas except the 25th December with an early close on Xmas Eve. Boxing Day will have a special service every 15 mins between Highbury & Islington and West Croydon only. If using those Boxing Day services to get into central London, the Elizabeth line is closed on Boxing Day, so use Canada Water for the Jubilee line which is open.

Catford Bridge and Lower Sydenham will have no trains from the 22nd onwards.

Crofton Park and Catford will see a Saturday timetable with peak extras from 22nd-24th December and no service on Xmas Day and Boxing Day.

Obviously this will be updated nearer the time including New Year's services. It's likely if the Windrush overnight service happens this year, it'll be a reduced service as there's no service on NYE from 2300 between Sydenham and Crystal Palace for engineering work.