Westminster car crash: Latest updates - BBC News
Updates as a man is arrested on suspicion of terrorism offences, after a car crashed outside Parliament.
International security expert Will Geddes says the latest incident in Westminster raises questions over whether the area around the Houses of Parliament should be pedestrianised.

It has been 18 months since Khalid Masood ploughed a car into crowds on Westminster Bridge, killing four people.

Mr Geddes told the BBC that counter terrorism initiatives often come off the back of these types of incidents.

He said: "There are some very good questions to be put forward as to whether this area in fact probably needs to be pedestrianised."

"Bearing in mind its iconic position, maybe more steps need to be taken."