Police have confirmed 58 arrests for breach of Section 14 of the Public Order Act from members of the United Against Facism (UAF) protest group near the Houses of Parliament in central London.
The Met Police also said the BNP protest in nearby Old Palace Yard has ended.
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At least one person has died after part of the building collapsed shortly after midnight, according to local reports.
Brazilian police said no such incident took place and have charged the Olympian with making a false statement.
A boy aged around six or seven was seen being bundled into the side of a black VW van in Redhill, Surrey during rush hour.