And if they leave the UK, the beginning of the end was at least three years ago - the Brexit referendum.
In a recent poll of Tory members, a majority would be happy for the break up of the UK to secure their precious Brexit. This from the primary unionist party of the UK.
the question is "now what?"
Well, there are calls for the immediate recall of Parliament by some MPs. Many are already there in a protest. Dominic Grieve the former Attorney General says that prorogation has now legally not happened and so if the Government wants to prorogue Parliament, it must do so afresh. The official government line is that they're going to wait for the decision of the Supreme Court on Tuesday.
Hopefully the high court can deal with it expeditiously.