Emergency procedure?

So, I am in awe of the London emergency services. I have no doubt that they no what they have to do. But I cannot believe they were not whipping out the old gas masks and bio suits as soon as they arrived. In fact, I watched the news reports most of the day and don't remember seeing one at all. Hmm.*

*I do acknowledge that the absence of such gear probably contributed to the lack of panic. Londoners are well used to seeing coppers gathering in groups around the streets. It usually happens when there is a big footie match.