Does this help in any way? You just need a 2/3 majority no?
It shortens the timeline I think - they're betting on Corbyn being unwilling to stand aside, therefore a GNU won't get the votes, which means they can shortcut the timing to get a GE before Brexit day - an election after Brexit day would be suicidal as we'd have the actual results of no-deal, food and medicine shortages, English Police on the border in NI etc.
It shortens the timeline I think - they're betting on Corbyn being unwilling to stand aside, therefore a GNU won't get the votes, which means they can shortcut the timing to get a GE before Brexit day - an election after Brexit day would be suicidal as we'd have the actual results of no-deal, food and medicine shortages, English Police on the border in NI etc.