Thousands of commuters faced delays and cancelled journeys today after flooding partly closed the mainline between Brighton and London. Services affected during this morning's rush hour because of flooding at Patcham.
Trains are now able to stop at London Bridge following over running engineering work.
Disruption on Southern trains is expected to continue until 0900 with delays of up to an hour and some cancellations.
First Capital Connect services are reported to be returning to normal.
Tickets are being accepted on London Buses, Underground / Overground and First Capital Connect.
First Capital Connect and Southern services are currently unable to stop at London Bridge, leading to delays of up to 60 minutes and cancellations due to over running engineering works.
Tickets are being accepted on local bus routes and London Underground services.
First Capital Connect say it is hoped that trains will be able to resume stopping at around 06:00.
Southern services are also affected by the disruption.
A spokesman for Southern trains said:
"Southern achieved improved scores in many of the categories, but we are disappointed that our overall satisfaction score hasn’t risen.
"We recognise that performance is a key driver to achieving passenger satisfaction and for much of the survey period, general railway infrastructure problems and a particularly difficult leaf fall season made it a particularly challenging period for us. We operate around 2,300 trains each weekday on one of the country’s most congested networks where knock-on effects from one small incident can cause major problems.
"We are analysing the results and will be working hard on a plan to improve in the areas where our passengers tell us we need to."
Severe delays on London Overground between West Croydon and Highbury and Islington due to earlier trespass incident at Forest Hill.
Services are subject to delays and cancellation. Also affecting Southern services.
The incident at Gatwick Airport is also causing disruption on Southern Trains (between Victoria and Horsham and between Victoria and Hastings) and the Gatwick Express.
Lines are blocked and journey times may be extended by up to an hour.
Replacement bus service running on Southern between Ashford International and Rye due to broken down train at Ham Street.
Journey times extended by up to 45 minutes.
There's disruption on Southern Trains between Victoria and Sutton, and between London Bridge and Wimbledon due to an earlier lineside fire at Mitcham Eastfields. Tickets are being accepted on London Buses and Tramlink services.