I ask again could he dump the erg like he dumped the dup and accept a customs union or even a 2nd ref as the price of a deal? I assume that’s where he actually is now in reality? Assuming Corbyn refuses to entertain an election, which I believe he will.
Theoretically, he could do either of those things tomorrow and pass it easily. Indeed, the customs union is Labour's position - Corbyn is a Brexiteer, he wants to leave the EU wholeheartedly, but he's a soft Brexiteer who wants the custom union.
In reality, no, he can't. He's politically boxed into a hole due to his red lines, just like May was. And realistically, he simply won't want to - the point of Brexit for him and his mates is massive deregulation and a race to the bottom to profiteer.
Corbyn will take an election - he has no choice. Ignore the rhetoric and look at it logically - as much as I actually hate Corbyn, he's spot on to spot the danger of an accidental no deal and avoid an election until its' off the table.
Once Johnson accepts the extension, an election will be on the table the next day and will happen. He has no choice. If he refused it at that point, even his own supporters would be laughing at him - he'd have no reason to not have one.
It is only the Tory party spin about him "being a chicken" etc. that makes anyone believe Corbyn is ducking an election for anything other than the reason given of avoiding no deal.