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					Originally Posted by Chris  Only the Queen can appoint a Prime Minister and only the Queen can replace one.  If Parliament wished to force Boris to resign then it would have to petition the Queen directly and ask her to do it.  That would place her directly into a political position.  In our constitution that’s about as close to pulling the nuclear trigger as you can get.  If the alternative was a general election, following which Boris would resign in the conventional fashion if he lost, then there is absolutely no way the Queen would intervene.  She would always follow the path that does not require her intervention. | 
	
 I think the Queen would be brought into irrespective when faced with a PM who refuses to leave despite having a Parliament that has confidence in someone else. That seems like a rubicon crossed if that ever actually happens. I mean what would she do if this were after an election and the existing PM refused to go? She would have to fire them. 
The question is how far can you break convention before the Queen does have to enter politics? Because in the end, the buck does stop at her door. 
From what we know about Boris Johnson I don't him being the one willing to do it either. I suspect this is a bluff.