Over-running engineering works are causing disruption near London Bridge.
Because of this, there are delays of up to 80 minutes to journeys between New cross and London Bridge.
These delays will continue until further notice.Trains between Dartford and London Bridge via Greenwich may be diverted via Lewisham.
First Capital Connect services are currently unable to call at London Bridge.
More top news
The 20-year-old was found fatally wounded on Roth Walk, near Finsbury Park, north London at around 3am on Saturday, Scotland Yard said.
Police have arrested a man wanted in connection with a burglary at the home of pensioner Richard Osborn-Brooks.
The rally comes after it emerged that the Home Office destroyed thousands of landing cards documenting the arrival of windrush-era migrants