TfL rules out regular London Overground trains to London Bridge

A plan to run London Overground trains into London Bridge as a regular service is unlikely to happen because Southern is expected to restore their service through the Sydenham Corridor to four trains an hour in 2025.
Overground train at London Bridge on a recent test (c) ianVisits
At the moment, Southern provides two trains an hour, having reduced the service during the pandemic. Although the line is shared with the London Overground along most of its route, people usually have to change trains