Commuters are enduring a second day of rail disruptions after a large sinkhole opened under the railway track at Forest Hill Station in London.
The 13ft deep hole opened on Monday, closing the line and thus fouling up much of the rail network with a knock-on effect.
The following alterations will apply until at least mid afternoon on Tuesday:
A revised service to and from London Bridge will operate, with trains unable to call at stations between London Bridge and Anerley.
Passengers are advised to use trains from London Victoria or London Blackfriars.
London Bridge to East Grinstead / Caterham / Tattenham Corner/ Uckfield
These services will be diverted via Peckham Rye and will not call at stations between London Bridge and Anerley.
London Bridge to Eastbourne / Littlehampton / Bognor Regis
These services are expected to be mostly cancelled.
London Bridge to Horsham
Trains will be diverted to London Victoria.
Trains will not run between London Bridge and Brighton until at least 14:00.
Passengers are advised to use Thameslink services between Blackfriars and Brighton or a Southern service from London Victoria.
Trains will not run between West Croydon / Crystal Palace and New Cross Gate.
Paul Rutter, area director for Network Rail, said: “Following investigations, a collapsed sewer has been found at the site of the hole which was found on the railway in the Forest Hill area yesterday.
“Network Rail engineers have been working with our counterparts at Thames Water throughout the night to identify and fix this problem as quickly and as safely as possible.
“Because of the location of the hole we are unable to run trains on this track through to London Bridge this morning and it looks likely that disruption to services will continue throughout the day.
“Passengers are advised to check before they travel and allow extra time for their journeys. Further details will follow as soon as they are available.
“We apologise sincerely for the disruption and assure passengers both Network Rail and Thames Water are working hard to restore the railway to full capacity.”
To follow live updates, check the National Rail Enquiries real-time Journey Planner.