Labour MP for Camberwell and Peckham Harriet Harman has told ITV London that journalist Kieron Byron held in Russia over piracy charges, is "not a threat to the Russian state", adding that he should not be mistaken for an activist.
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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