A cracked rail will see services disrupted through Lewisham today after discovery over the weekend.
Network Rail will work on the problems this evening meaning last-minute adjustment to services.
Lewisham is a notorious spot for signal issues and track defects. Network Rail are currently spending £55 million upgrading the area.
In other problems this morning services are disrupted after a bridge strike. Track was damaged yesterday around Gravesend after a bike went on the line though that was resolved overnight.
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