Yeah, I mean look at the turncoat MPs of late. Farage can of course get elected as a Reform candidate, nothing to stop him switching to become a Tory MP once he gets there - this possibility should be put to him during the campaign to see how he commits himself. Anyway, if after two months he says, right, I think I'll become a Tory and take my Reform MPs with me, yes, you could have a coup on your hands, all above board. I suppose it would be hard to work that with the leadership schedule seeing as it's a given that Sunak will step down immediately but if Sunak doesn't, Farage has a way in.
With some of his advisors, I guess if they see Sunak as a lame duck then nobody feels they have to save him from himself. Mistakes do crop up because it's such an overworked position.