RAW VIDEO: Scotland Yard said the incident happened at 11.55m. Talhat Rehman was arrested and has since been charged with two counts of possessing a bladed weapon in public and affray. Grant Shepherd, an onlooker at the scene tweeted: "Crazy man with a knife to his throat just stopped the changing of the guard at Buckingham Palace." Another picture taken at the time showed large crowds at the scene, who had turned up for the traditonal morning ceremony.
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