I don't know if people in the UK realise how much danger there is from Reform.
The UK political system has no written constitution, it has left the EU and two of its major parties say they intend to leave the ECHR. Leaving the ECHR would allow the UK parliament to do anything it wants including a re-run of 1930s/40s Germany.
There would be no supreme court to stop it because there is no constitution. The monarchy wouldn't do anything either.
Fascists in power in the UK would have no checks and balances. Trump has at least had some speedbumps slowing him down, Farage would have nothing stopping him at all.