There will be no trains between East Croydon and Gatwick until after the holiday, trains are now running to East Grinstead buses being used from there to Gatwick or Three Bridges.
Trains running between Brighton - Portsmouth Hbr plus Littlehampton & Bognor connections
Brighton - Seafrod/Eastbourne
Eastbourne/Hastings
Eastbourne/Haywards Hth
That's about it for now
No mainline services between East Croydon and south of due to a landslip, some buses running between Croydon and Gatwick and Three Bridges and Haywards Hth. Very patchy service in other places with not much road transport alternatives
Latest update
Brighton to Haywards Heath every 30mins
Brighton to Eastbourne hourly
Brighton to Newhaven hourly
Brighton to Barnham every 30 mins
Bognor to Barnham every 15 mins
Victoria to Gatwick every 30mins about to start
Still waiting for clearance between Gatwick and Haywards Hth