In answer the the original OP and their opening post
No; although reform have a certain amount of popularity, there are far far too many voters that see them as the charlatans that they are.
The quality of the reform candidates put forward for local elections has been somewhat dodgy to say the least. To think that people are going to trust these type of candidates to actually improve local governance is slim. How’s Farage done in Clacton? He’s been off kissing Trumps arse for months now doing bugger all actual work
The GE last year will probably represent their peak. They’re already haemorrhaging internally; I support tommeh/tommeh is an idiot etc.
Several million voted for them. But that’s never going to be enough to do anything but snipe from the sidelines, stir up division and probably little else.
They have no answers, and their “policies” (lol) will only create more problems.
The average voter understands this, and is more than intelligent enough not to swallow the snake oil. Populism is simple answers to complex problems as the OP brilliantly displays. So no, reform will not succeed in taking many seats at the locals.
The average Brit is thankfully too intelligent and compassionate let that happen.