If the committee invites the Prime Minister and he accepts the invitation, it would no doubt be a good thing.
You said that the prime minister had the constitutional power to advise Her Majesty's representative, the governor general. It's not quite that simple, though, because, the prime minister doesn't actually exist in our constitutional documents. His relationship with the governor general is governed by conventions, in other words, those unclear and unwritten rules that cannot be enforced by the courts. That's the point I made at the end of my opening statement. It is indeed important to proceed cautiously, because our greatest asset—our parliamentary democracy—hinges on very delicate rules that can exacerbate a crisis, rather than help resolve it.