A summary of today's developments
A man has been arrested after a car was driven into the gates outside Downing Street at around 4.20pm on Thursday, police said.
No one was injured. The Metropolitan police said armed officers arrested a man on suspicion of criminal damage and dangerous driving after the car struck the gates blocking the entrance to the street, where it joins Whitehall. A section of Whitehall was cordoned off after the incident.
Police said the man was taken into custody and the incident was being dealt with by local officers in Westminster and was not being treated as terror-related.
Rishi Sunak was inside the Downing Street complex, which includes the flats for the prime minister and chancellor, as well as a network of offices that connect to other government buildings. He left soon afterwards.
Updated