Below, i've reposted from Southern's website (in case it's down again tomorrow). I think the Purley->London Bridge service is intended for us, but it's not clear.

http://www.southernrailway.com/main.php?page_id=5

SEVERE DISRUPTION TO TRAIN SERVICES - TUESDAY 3 FEBRUARY
Last updated 22:10 Monday 2 February

Due to the adverse weather conditions, Southern will be running a revised service for Tuesday 3rd February.

We will be running the following services:

- A half hourly service between Brighton and London Victoria
- An hourly service between Three Bridges and London Victoria
- A half hourly service between Purley and London Victoria via Selhurst
- A half hourly service between Purley and London Bridge
- A half hourly service between East Croydon and London Victoria via Crystal Palace
- A half hourly service between Brighton and Seaford
- A half hourly service between Horsham and Three Bridges
- A half hourly service between Bognor Regis and Gatwick Airport via the Arun Valley Line
- A half hourly service between Brighton and Southampton
- A half hourly service between Brighton and Portsmouth via Littlehampton
- A half hourly service between Brighton and Eastbourne
- An hourly service between Eastbourne and Ashford International
- An hourly service between Eastbourne and Hastings

These services will commence at approximately 05.30.

For train times and train running information, please call National Rail Enquiries on 08457 48 49 50 or visit http://www.nationalrail.co.uk

Also, for more information about Southern services and London Underground service information, please visit http://www.journeycheck.com/southern

There will be no services on the following lines and routes:

Tattenham branch
Caterham
Watford Junction
East Grinstead
Uckfield
Epsom to Horsham via Dorking
Epsom Downs
West Sutton to Wimbledon
Beckenham Junction
South London Lines (London Victoria to London Bridge)
Tulse Hill
Redhill to Tonbridge

We apologise for any inconvenience caused during this disruption to Southern services. We are working towards returning our services to normal.