A man has appeared in court charged with possessing a knife and assaulting a police officer following a security breach at Downing Street.
Byung Jin Lee, 32, was arrested when he climbed over a 6ft high set of iron railings at the back of the prime minister's residence on Sunday.
Tony Blair was at Number 10 at the time but police said he was not at risk.
Mr Lee, of no fixed address, was remanded in custody by City of Westminster magistrates.
Speaking through an interpreter, Mr Lee gave his address as Orange Drive, Jericho, New York.
He is next due to appear at the same court on 17 October.
Security at Downing Street is under review but Scotland Yard said: "We are satisfied that at no time was the prime minister at risk."