Re: So, to sum up. . .
"So the PM uses the powers that he specifically has within the constitution, in the manner that they were intended to be used (to end a parliamentary session and reconvene another setting out a new agenda for the Government), and you declare this to be 'unconstitutional'?"
Yes. Against the spirit of constitutional law, even if not the letter. Shutting down the only democratically elected branch of government because you don't like what it might do is autocratic. To pretend otherwise makes you a liar or a fool.