A tree blocking the railway between Chessington South and Motspur Park has meant all lines are blocked between the two train stations.
Trains are currently unable to run between Chessington South and Raynes Park. This is expected until at least 7.45am, with delays for South Western Railway commuters expected until 9am.
A message posted on the National Rail website read: "You may be entitled to compensation if you experience a delay in completing your journey today.
"Please keep your train ticket and make a note of your journey, as both will be required to support any claim."
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