Saturday 15th October:

Southern: No service, except for two late night services from London Bridge at 0020 and 0035. A replacement bus service will operate from Victoria to Forest Hill leaving Victoria at 2356 arriving at 0128 as it runs via Balham and Crystal Palace. (I'd use the 185 instead which will be much faster).

London Overground: Normal service.

Sunday 16th October:

Southern: No service.

London Overground: Normal service.