A new viaduct has come into operation at London Bridge following 10 days of engineering work over the Christmas period.
Southeastern services did not call at London Bridge, Waterloo East, Cannon Street or Charing Cross stations while the work was being conducted.
Services running to Charing Cross have not been stopping at London Bridge since January 2015, and those services currently travel across the new Borough Viaduct.
Network Rail Thameslink programme december 2015
Thameslink Programme director Simon Blanchflower said: “By opening Borough Viaduct, we have been able to take two existing tracks out of use for rebuilding, which is a crucial step in the ongoing reconstruction of London Bridge station.
“Platforms alongside those new tracks are rapidly taking shape and we are looking forward to opening the new station concourse in August this year.”
A new concourse is set to open in August 2016, which will allow trains running to Charing Cross to resume stopping at London Bridge.
In addition, refurbishments to existing platforms mean trains travelling to Cannon Street will run straight through London Bridge.
The redevelopment is scheduled to complete by 2018.