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Rail commuters could face disruption through to this afternoon.
Problems arose after London Cannon Street railway station was flooded yesterday afternoon, leaving some platforms unavailable.
The disruption is affecting Thanet services.
The disruption is expected to continue until noon.
Some trains have been diverted to London Blackfriars as a result of a leak, which was discovered in a building above the station on Monday afternoon.
Trains to and from Cannon Street that use the Sidcup, Woolwich, Bexleyheath or Hayes lines may be cancelled.
Passengers are advised to check before they travel.