Agreed and, even with insider information with regard to the Home Secretary's movements, cannot imagine that the college would not have been checked and double checked for explosives before the speech. Good to have a happy ending though...
I hadn't even thought about the wife's boyfriend but you may well be right. My theory, probably totally off the wall, is that the Rob MacDonald character is setting up Tahir Mahmood so that he looks inefficient, but is there more to it than that? Strange that Tahir appeared with the briefcase...