Buses are replacing trains between between Barking and Grays via Rainham on C2C due to emergency engineering works.
There will be no service on the Rainham branch until at least Tuesday afternoon, because of damage to the overhead lines.
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