Delays at London Paddington train station have now been cleared, following two days of disruption.
Services to Heathrow Airport were suspended and other services were cancelled on Thursday after two fires caused signalling problems.
Trains are now running normally to and from the station.
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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