The Coroner's response:
I am surprised that superhighways exist if that is the view of the Met Police.
The Met Police replied:
Ultimately TfL are the authority. The road capacity is not the concern of the police, but it is of TfL.
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In a wide-ranging Peston on Sunday interview, he said Parliament security needs reviewing and the PM's counter-terror strategy is flawed.
The terror attack carried out by Khalid Masood at Westminster that left four people dead lasted less than two minutes say police.
Two knives were found at the scene in Islington, North London, and the suspects fled on foot before being arrested.