I realise that this thread has been dead for 36 hours, but the level of misunderstanding among the public, MPs and even some so-called lawyers is really annoying me. Now I'm no expert, but my understanding here is as follows.
None of us voted for this particular coalition government - a fact that many Labour voters are still banging on about day after day. So there is absolutely no reason why Parliament should be dissolved simply because this particular coalition fails (which I hope it doesn't). Should the coalition fail then the Tories would possibly try to run with a minority Government - if that failed DC would be forced to resign. Then the parties would try to form a new coalition. If that failed, then, and only then, would it be appropriate for Parliament to be dissolved and a General Election be called.
This from the BBC News website:
"Professor Gavin Phillipson, who teaches constitutional law at Durham University said a prime minister who lost a confidence motion would still have to resign.
"This won't stop MPs being able to bring down an unpopular government, just as they can now."
The 55% threshold was about a separate issue - when Parliament can be dissolved early, he said.
Currently, losing a confidence motion tended to lead to the prime minister asking the Queen to dissolve Parliament, triggering a general election.
But he said: "Under the proposed change, parliament would remain sitting and the political parties would have to see if they were able to form a new government - either a minority administration supported by a 'confidence and supply' agreement or a new coalition with a new prime minister.
"The idea behind the 55% rule is to make sure that one party on its own can't trigger a fresh general election." "