First Capital Connect is running train services between Brighton and Haywards Heath and Southern has started running a few services between East Croydon and Victoria.
There are no direct trains from Brighton to London after the overnight storm caused flooding in Balcombe Tunnel, electrical problems and blockages due to fallen trees and branches.
A spokesman for the train operator said: “We are currently trying gauge the full extent of this damage and the prospect for operating services safely.”
Only the listed services are currently operating:
East Croydon – Victoria – East Croydon
Epsom/Dorking – Victoria – Epsom/Dorking
Beckenham Jnc – London Bridge – Beckenham Jnc
Caterham – East Croydon/London Bridge – Caterham
Oxted/East Grinstead – London Bridge – Oxted East Grinstead
Brighton – Barnham – Brighton
Barnham – Bognor Regis – Barnham
Brighton – Eastbourne – Brighton
Brighton – Newhaven – Brighton
First Capital Connect are running a Brighton – Haywards Heath – Brighton Service
Ticket flexibility has been increased to allow passengers to change their time of travel.