Timetables are being prepared and are nearly complete.
If you will be going by train to Charlton on Boxing Day, an hourly service will run starting at 0651 to Three Bridges, only calling at Haywards Heath. This will connect with a bus to East Grinstead (takes 20 minutes) which will then connect with a train to London Bridge, calling at East Croydon only. Southeastern are NOT running a service to Charlton on Boxing Day and no services will run to Victoria.
On the other days whilst Purley is closed, shuttles will run between Brighton and Gatwick and buses will run between Three Bridges/Gatwick and East Grinstead for London Victoria and between Three Bridges and Coulsdon Town for London Bridge (fastest way to London).
Should all be confirmed next week.