Some interesting comments on the effectiveness of the prorogation at Zerohedge. That article quotes a pay-walled article from a web site called Eurointelligence, a web site about politics and economics in the Eurozone.
It argues that there is no time now for any legislation to pass. And so:
There is still one option left for Remainers to pursue, but it is very risky. They could hold a vote of no confidence when they come back next week. If they win, the fixed-term parliaments act sets out a definitive procedure. The House of Commons has two weeks to secure a majority in support of another prime minister – a technical government as the Italians would call it. But this is unlikely as the opposition is hopelessly divided on this point. If that effort fails, the Commons would be suspended for new elections. But, crucially, it is the government that sets the date for them. Number Ten said yesterday that the date for elections would be November 1-5, that is after a no-deal Brexit. In other words, a no-confidence motion could actually trigger a no-deal Brexit, as the Commons would have deprived themselves of the opportunity to ratify a withdrawal agreement.