Definitely won't be in 2024. Indeed I can see a situation where basically both parties essentially ignore Brexit entirely in 2024 under the belief (not entirely wrongly) that the electorate just don't want to talk about it anymore right now. For the Tories to pivot back to being "in Europe" in some way would require a fairly hefty shift of power in the party. I can see them post-2024 going full on headbanger and embracing the neo-fascist wing of Braverman and the like as their new position, which will then promptly get another thumping in (probably) 2028 on the basis that the public never reward political parties which try that (2001, 1983 etc.), barring some major catastrophe hitting the incoming Government.One thing that I've started to see suggested by various commentors, is that the Tories suggest rejoining the EU, wrong-footing the Labour party as the side wanting to stick to a lousy deal.
I can't see it happening myself, at least not before the GE, but I could see it happening afterwards if Labour sticks with its Brexit policy ... particularly if the Tories get a drubbing.
What has definitely happened is the Torygraph has become much more critical of Brexit over the past few months. It's always been rabidly anti-EU and pro-Brexit - that's no longer the case. And the Torygraph is a good indicator of the way that the party is thinking.
It's very, very unlikely that the next Tory manifesto contains a commitment to rejoin the EU but I wouldn't entirely rule it out.
By 2032, however, that could be very different. We'll be nearly two decades on from the referendum, the demographic changes will have really taken over and suddenly it's likely there'll be a huge will to rejoin Europe in some way (unless something changes and either Europe collapses (unlikely) or Brexit suddenly clicks and everything's rosy again (slightly less unlikely, but only slightly). I wouldn't rule out the Labour party in 2028 pushing to rejoin EFTA, and if that has happened (or is in the process of happening) the Tories could find themselves with no choice but to back it.