My hon. Friend mentions fires, as a number of hon. Members have done. We have talked about actual fires. Only a few months ago, in my office there was a smell of burning and soot falling from the grates in my ceiling. I phoned the emergency number, but by the time I had reached the door of my office there were fire wardens in the corridor. That is the reality of preventing fire, and happily, so far, it has been successful.