Likely, after Brexit, occurs, and Scotland splits off from UK, Farage will be PM of England.
That’s a possibility but not a probability
1. Farage is a single-issue candidate
2. Farage has never won any political seat in the UK - not that he may not in the future, but in the past he’s never won any. he’s only been an MEP
3. His party has no other issues or topics
4. If he tries to take over the Tories, then Boris Johnson, Rees-Mogg, Gove etc. would want to be PM, not him