One or two election cycles, but afterwards it will be too boring to hear the same excuses.
Soon after dissolution of Czechoslovakia, people in Slovakia blamed Czechs for all kinds of things. (We had an agreement that neither side will use the old federal flag; they kept it. We had an agreement that the national treasure will be split proportionally; they decided to keep it all. Plus a few more things. I am sure the other side also had their complaints.) A decade later, after most politicians from that era retired, no one mentioned this anymore. People who were not yet adult during the federation simply don't care; it's ancient history for them, like complaining that your garden does not have nice flowers because dinosaurs once stomped on it. Yeah, but what did you do about it since then; you had enough time to do something, right?
I feel like an old person just for mentioning the old issues. Similarly, ten or twenty years later, Farage will be just some uncool old grandpa no one cares about. It may be hard to imagine, but it will happen.
That doesn't seem to be disappearing. My guess is we will be hearing a lot more about the EU for the foreseeable future.