A man has been charged with possession of a knife after he was arrested at Buckingham Palace on Monday morning.
David Belmar, 44, of Daleview Road, North London, was also charged with trespass on a Protected Site.
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Analysis of data from hospitals in England showed patients were waiting longer for ambulances, treatment and admission.
She told reporters: "I don't think it's fully sunk in how really bad that could have been, I know it's not the right decision."
Jonathan Theobald said: "The weather can change quickly and a car can become lethal, I've discovered that the hard way."