The judge told the defendants he regards them as dangerous men. He told Kevin Liverpool it was a "crazy scheme by a crazy person which was likely to fail... It was your intention to kill Joss Stone and to rob her. I regard you a very dangerous man".
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An "erratic" driver sparked a security alert after ploughing into a police car near the US Congress and nearly mowing down several officers.
Thousands of people have linked hands on Westminster Bridge in a show of solidarity - one week after the terror attack in the capital.
PC Keith Palmer, 48, stabbed by Khalid Masood while on duty in the grounds of the Palace of Westminster last Wednesday.