If a kid throws their ice cream on the floor, giving them another one soon afterwards doesn't in any way teach the other kids not to throw their ice cream on the floor. This is very firmly a "no ice cream for you then" situation. I think labour realise they if they tried to rejoin, they would get a very rough ride indeed from the EU with massive amounts of playing hardball and that the best they can hope for in the next five years really is some softening and smoothing of the deal for being cooperative. We agree to fund EU science a bit, they let us back into erasmus, that kind of thing (although specifically not that).

But joining the EU takes a decade or more sometimes, and the "but it's really very simple, we follow most of the EU rules already because we're a former member" is as stupid as the "oven ready deal" and "German car manufacturers will insist we get a great deal" nonsense.