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Southeastern services through Kent have suffered major disruptions this morning, just days after trains began stopping at London Bridge again.
Trains to London Charing Cross have not been stopping at London Bridge while works were carried out at the station.
The stop was reinstated on Monday.
There have however been major delays on the route between Ashford International and London Bridge, via Staplehurst, Paddock Wood, Tonbridge, and Sevenoaks.
Trains arriving in Paddock Wood as early as 6.30am were delayed, with delays continuing on services throughout the morning.
The worst delay was on the 8.13am service from Paddock Wood, which, despite arriving a minute early, arrived at London Bridge an hour and ten minutes after it was supposed to.
Trains between Tunbridge Wells and London Bridge have also been heavily delayed this morning.
The 8.24am service, which is due to arrive at 9.14am, arrived over an hour late.
It is believed that a signalling error has caused the disruption.
Trains may be diverted to London Victoria or Blackfriars due to the issues.
Advice on the National Rail website says that problems with trains to Charing Cross are expected to continue until 6pm.
A Southeastern spokesman said: "We are very sorry for the delays passengers experienced this morning due to signalling problems between Lewisham and London Charing Cross.
"Both of these issues have been fixed by Network Rail engineers, however there are still delays to services as they recover.
"We are working hard to recover services and tickets are being accepted on alternative routes."