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Kent commuters are facing disruption as Southeastern and Thameslink trains are suspended this morning.
A track defect was discovered at New Cross overnight, affecting services into London.
Southeastern trains are not running between Charing Cross and London Bridge, while Thameslink has been suspended between Dartford and London Bridge.
Some services are being diverted and tickets will be accepted on the London Underground and buses.
It's thought work to fix the problem will not be completed until at least 10am according to Southeastern Railway via Twitter.
Passengers with tickets from Strood, Higham and Gravesend can use High Speed services to St Pancras at no extra cost.
Dartford commuters have been told they can use London buses free of charge to get between the station and London Bridge.
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