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Many of the protesters wore face masks and were dressed in red. Some waved banners with slogans such as: "The UK is not innocent: less racist is still racist", "Racism is a global issue" and "If you aren't angry you aren't paying attention."

Floyd died after a white policeman pinned his neck under a knee for nearly nine minutes in Minneapolis on May 25, reigniting the explosive issue of police brutality against African Americans five months before the November presidential election.

His death has unleashed long simmering rage over perceived racial bias in the U.S. criminal justice system and raised questions about racism across the world.

The Hyde Park rally is the second major protest in Britain after hundreds gathered in London's Trafalgar Square on Sunday (May 31) before marching to the U.S. embassy.