nigel piraj joins us now we're hearing reports that theresa may the british prime minister has been briefed on this whether she is about to make a statement i have no idea, but she's been briefed. this is a familiar kind of pattern of events here. i don't know if londoners are getting used to it or you're getting used to it but your thoughts? >> well you know don't forget of course that we had irish nationalist terrorism for 30 years and london is rather more used to terrorists attacks perhaps in other places in west. as you say this has a very familiar pattern but with one big difference. that the previous people that have done this have all been shot dead by the police. this individual if it is an icy motivated attack, this individual has been captured and it was the public who first pinned him down but this individual now is in the hands of the police so in terms of intelligence, that could be very useful and the feedback i'm getting, neil, is that underground stations are being closed in central london. i'm just driving into the center at the moment but very much increased police presen