A signalling problem at London Bridge has meant trains are unable to stop at News Cross or St Johns, Southeastern has warned.
National Rail say the signalling problem is between Lewisham and London Bridge and that train services are being affected.
They are warning passengers that the disruption may not be eased until 4pm.
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A statement read: "There is an issue with points near London Bridge (a piece of equipment that allows trains to move from one line to another). Response staff are on site.
"Trains from Cannon Street towards Lewisham cannot call at New Cross and St Johns. Trains towards Cannon Street are calling at both stations as normal."
Please remember to drink plenty of water when out in the sun or on trains today as temperatures across London soar.
UPDATE - Good news
CLEARED: Trains can now stop at #NewCross and #StJohns as normal.https://t.co/OqHGPZolUX
— Southeastern (@Se_Railway) June 29, 2019
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