Nah, they’ll begin the candidacy talks, the U.K. will say “soo same deal as before, maybe we compromise on the color of the passport?” the E.U. will say “LMAO. To start with, the Euro is non-negotiable” and that will be the end of that until 2050 at least.
Having a Rejoin movement in the UK is one thing, good on them for rubbing the Leavers’ noses into their own shit stains, but everything I know about the UK shows that you will never get a majority of voters in favor of the new accession rules, that have been repeatedly stated by the EU as non-negotiable (for obvious geopolitical reasons of fairness towards other EU member states as well as fear of precedent-setting).