Fixed-term Parliaments Bill

I absolutely understand the hon. Gentleman's point that a Government elected on a manifesto for four years would not want to be obstructed by the House of Lords, and I doubt whether the Lords would obstruct them in those circumstances. Does he have any sympathy with the view that constitutional issues ought to have greater protection than ordinary Bills, particularly as judges have decided that there is a category of constitutional Acts? Should we decide that rather than the judiciary?