The lesson people should learn from Farage and Reform (which they won't, let's be real) is that the entire Brexit movement and all the subsequent European alt-right movements are incredibly astroturfed. They're the product of wealthy people funding fascism to avoid the electorate talking about economics ie why they're increasingly poorer and why there's increasing wealth and income inequality. Reform wants to direct attention to immigrants. It's pure distraction.
It's the exact same thing in the US. It's immigration here too but it's all the other culture war bullshit issues like trans people too.
What fomented all of this in the UK is that the UK government decided to bail out the banks after 2008 at the expense of taxpayers and then that was used to justify a decade of austerity measures that crippled the economy and wiped out the working class.
It didn't have to be that way. Other countries like Iceland [1] let the banks fail and their economies massively benefitted.
[1]: https://www.worldfinance.com/special-reports/failing-banks-w...