>it has to be a masterpiece of stating the obvious

I suspect that you are absolutely right. The hardest thing to write is a piece of journalism where, under anti-terrorist legislation you are not allowed to give away any information that might prejudice investigation of the case. The police were not "keeping an open mind", they had been given a coded warning but were not prepared to release that information at the time that this piece was written.

You are left with the sentence. "There was a bomb, it went bang." Whilst, we all know that y'all could make a much more interesting story , y'all'd have the same problem writing the story.