And a change of the rhetoric in the EU.
Unfortunately the move from the hardline stance of "No extension without a referendum or GE", to "Well if you are going to leave without a deal, of course we will extend", may be significant. But it is totally missing the point. The very LAST thing the next PM will want it more time. They don't want the EU to give more time to allow them to self destruct totally and a GE to happen. They want the EU to come to the table and accept that what the EU wants and what the EU is going to get, are not one and the same. Then they want the EU to start negotiating.
Otherwise we will leave with no deal.
All the EU need to do is listen to what is being said and to understand the situation.
Notably they are not listening. Have not listened. Have never listened. Which is why the UK and the EU are at this impasse today. The situation has never changed, they only listen when the barrel of the gun is at their head, the slack is taken up on the trigger and there is no other thing to listen to.