Supporters of Anonymous have also protested in Dublin and Belfast as the movement takes part in the global protest against corruption on Bonfire Night.
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The London Marathon brings together thousands of people raising money for charity - not to mention some rather unusual costumes.
Tottenham Hotspur footballer Kyle Walker said he is "disgusted" after being wrongly linked to an explicit video being shared online.
Tributes have been paid to a young BBC Radio presenter who lost his battle with skin cancer aged just 33.