The problem for him before is that the Tory Party bring out their big guns in a massive campaign where he stands. Todate that has worked, it remains to be seen whether or not whether he will stand or the Brexit Party field a different candidate. I would suspect the Tories won't bother too much if it is not the great man himself and I suspect the same from labour, both thinking it is better to keep a low profile rather than receive the hammering either party could well get.
It could be interesting.