Southeastern rail passengers are being warned to expect delays, cancellations or changed routes until 9am due to a signalling problem in Lewisham.
A points failure at platform one and the line that heads towards both London Charing Cross and London Victoria has failed.
Trains leaving from Hayes, Sidcup and Orpington will not stop at Lewisham Station and services between Dartford, Gravesend and London Victoria maybe cancelled.
A fault with the signalling system at Lewisham means fewer trains are able to run on some lines.
Network Rail have confirmed that engineers are working on fixing the problem however, passengers are also advised to check before travelling and to allow extra time to reach destinations.
Passengers can also use tickets on London Underground between London Victoria, Embankment, London Charing Cross, London Cannon Street, London Bridge, Southwark and London Waterloo to complete their journey or they can also use London Buses between Lewisham, Nunhead and Denmark Hill at no extra cost.
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