Look, heckling is part of parliamentary debate. I think the occasional heckle is a good thing. But I would say that the problem isn't with the heckling, the problem is with the screaming, the fact that we need to use earpieces turned up on full volume.
I can tell you I think I've suffered some hearing loss in the last six years—and this is no joke, and my wife often says to me that I'm speaking too loudly—as a result of the fact that the noise levels in the House are often so loud. Now, they haven't been recently, but often in the last year they've been so loud that you couldn't hear the person next to you speaking, even with your earpiece turned on full.
One of the solutions the committee might recommend is for the House technicians to turn the maximum volume down by half. When the volume's turned down by half, the House will automatically quieten, because in order to hear what the question or the answer is, you'll need to have a degree of quiet in the House.
Quickly, to answer your other questions, I'm not proposing to lengthen the amount of time for question period from 45 minutes.
And in terms of what happens when the Prime Minister is missing on a Wednesday, in the British Parliament the Deputy Prime Minister steps up to the plate and answers the questions for the full 45 minutes. The British Parliament used to have two separate 15-minute question times per week for the Prime Minister; they've combined it to one. I think this is something we should take a look at too.