It probably wouldn't pass. That doesn't mean however that it wouldn't pass if it had Labour's enthusiastic backing and they worked hard at building a compelling argument for it. Right now there has been none of that from either party, so what should be a logical alternative has somehow become some niche option. That is fecking ridiculous considering the situation, and its largely Corbyn's fault.Nonsense, they already admitted after they pulled it that it probably wouldn't pass anyway and that's clear to anyone following brexit proceedings.
There's too many in Labour against it and too few Tories willing to support it. I don't think you're aware of the landscape at all