Scotland Yard's head of counter-terrorism has praised the way police officers at the murder scene responded.
Assistant commissioner Cressida Dick said that had the unarmed officers tried to intervene "we would be dealing with more murders".
– Assistant commissioner Cressida Dick, metropolitan police
I'm very proud of the response of the police and that includes of course, but is not only, the armed officers ...
I would hate to think that we were standing here talking about multiple murders rather than a horrible, horrible murder followed by firearms officers doing their job very well, very professionally, saving their own lives and probably saving the lives of others.