Yeah, I totally get it, your concerns are valid. Personally, I don't think they will, unless something dramatic happens to reverse the current trends. Reform UK has the plurality of support by polling for now, but they're trending downwards pretty significantly, their base is collapsing on several fronts - the extreme right contingent are too stupid to understand that Farage is a cryptofascist and want a more extreme party and keep splitting off to form crazy splinter parties that basically stand no chance of going anywhere, the moderate conservatives who hate the Tories are seeing loads of Tory party defectors being accepted into Reform and are getting progressively more and more pissed off about it, and the people who just want an anti-establishment party to vote for are getting drawn towards the Green's pro-working class, anti-establishment messaging. Pretty much this just leaves the people who buy into Murdoch propaganda and that is a rapidly aging demographic.

I think the greatest risk is something dramatic happening that spooks people into voting for authoritarianism, like a terror attack - or an early election being called before the Greens can attract enough support.