When I say "Parliament" I mean both Houses. If I meant either the Commons or the Lords I would say so. I don't think either House should be elevated over the other - both Houses have important historical and constitutional functions (as does the Crown) and together wield Parliamentary Sovereignty.
I agree that restraining government in Parliament is difficult - the ruling Party typically has a majority (though I will stress the difference here between Government and Party, with statutory limits on the number of MPs in government). As for choice of PM, if Parliament can't decide the Queen will. If Parliament puts forward an unsuitable candidate or can't decide then the Queen can make a choice instead. See the Douglas-Home case for example.
QED. My original point - Parliament is Sovereign, and ever since the civil war can even usurp powers of the Crown. I would note however that the changes to the dissolution of Parliament were to stop opportunistic Prime Ministers calling elections. I'd also like to point out that it's by convention that the Queen
does not use her powers, not that she can not.
I still have yet to see an example? Parliament can literally repeal, legislate or amend at will. It might well have serious consequences, but that wouldn't prevent Parliament from doing it. And as I've said before, Parliament is not bound by the result of a referendum.
I've never once said that having an uncodified constitution is a "downfall". I personally like the fact that Parliament has the power to act as it sees fit, it means we can avoid absurd situations because of legal constraints. However, with that come dangers obviously - but then having codified constitutions has never stopped dictators.
I suppose so, but that's not really what I was getting at. And as I've said before, the result wasn't binding.

Even then they're only a new phenomena. I didn't see any referendums held for the Acts of Union.
Again with being condescending! You're portraying everyone as a moron who takes their lead from the Sun. There are millions of highly-educated people in this Country, many of whom are far more qualified than those who sit in Westminster.
For direct democracy to be effective you'd need to give as much power as possible back to local areas. I'm a big believer in a PR electoral system with NO constituency link - that way you could raise your issue with an MP who is more likely to be sympathetic to your cause, much in the same way that you can lobby any Lord.
Indeed, if Alex Salmond gets his way.
You might remember that we were in fact due to hold a referendum on the issue. The government changed its mind - which the British government could do, the Irish government could not.