describing the events of last night and pointing out police neutralized those attackers within eight minutes of the first call. she's still saying they are obviously showing a much higher presence of police on the street, including armed police. the british security services may, may, depending on what the president says and what the independent joint task force says, raise the threat again to severe. there may, she said, also be another showing of military personnel on the street as we saw after the manchester attack two weeks ago. she's also calling on people not to panic, understanding the fear, understanding the frustration, as she put it. don't panic but remain vigilant. if you see the slightest suspicious thing, please tell the police no matter what it is. as i said, the prime minister is expected to talk. she has been sharing her cobra meetings this morning. nick robertson is down at west minister with more on that angle, the political angle of this unfolding story.