Rail services are disrupted after wet weather caused landslips at Battle and Crowhurst.
Train services between London Charing Cross and Hastings via Tonbridge may be cancelled, delayed or revised at short notice. Buses are replacing trains between Tunbridge Wells and Hastings until further notice.
Network Rail is working to clear the line, however it is advising it is unlikely services will be running today between Robertsbridge and Hastings.
Southern Railway is accepting Southeastern tickets from Hastings to Ashford.
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A spokesman from Southeastern said: "The safety of our passengers is our highest priority and with the risk of trees falling onto railway lines, flooding and landslips, Network Rail has put in place a 40 mph speed restriction across parts of the Southeastern network. This will take effect from 8pm Friday night until the close of service.
"We will work hard to provide the best possible service, however because of the speed restrictions trains will run slower than usual and some will be delayed or cancelled at short notice. Services on Saturday may also be affected.
"lease allow additional time for your journey and check live running information before you travel."
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