and actually to get more on this we're going to cross live to talk to david loki's a terrorism expert david tell us what's your assessment of the incident and how do you assess how the police have responded. i think the match probably said quite right treat this as a terrorist incident i mean it does look on the face of it as a possibility and that means being open minded to because it may not be at the end of the day but by choosing it's a terrorist incident that means that you scale up the nation investigation as the pictures are showing you got armed officers there you've got the areas now blocked blocked off and obviously with they're making investigations into this individual looking at what. a palace is he's got control over what devices he's been using so make the assessment is this an individual who's been inspired by some extremist cause to carry out this stock or is it quite simply a person who is who's got a knife and i'm going to talk when we have seen a number of knife attacks in the law and an area so we don't mind a book by having as a terrorist incident that means it's