If the leaders of the other 27 countries SAY “there will be no delays” that’s a different thing from them actually refusing a British request for a delay.
Meaning - say a scenario where the UK parliament rejects the deal AND the other 27 countries agree to the deal.
Then there are two alternatives: no-deal Brexit (highly unlikely now) or the UK to ask for a delay.
IF the UK asks for a delay, no PM or President or Chancellor from the other 27 countries wants to be known as “the guy who refused an extension to the British”, so they will reluctantly grant the extension - I believe even Macron would do that.
However I doubt that - the Tories + half of Labour should vote for the deal. Fingers crossed that the UK leaves on schedule on October 31.
Parliament has only two options: Brexit with a deal or Brexit without a deal.
UK is going to leave by October 31 and the Benn Act was just rendered inoperative.
Remoaners can of course try to force Johnson to do an Art 49 to stay in the EU before October 31.
Won’t happen because they don’t have the votes for it and they don’t want an election.
They’re hosed.