Don't assume every voter is as logical or engaged with politics as we are.

Many leave supporting voters especially in the North and Midlands but not just there would never be seen dead voting for the Tories. Anyone who seriously follows politics already knows that the only way to guarantee Brexit is a Tory majority. So anyone who is prepared to vote Tory and wants Brexit already will be voting Boris.

There will be leave supporting traditionally Labour supporting voters who would never vote Tory but would vote BXP. If BXP don't stand then they could return home back to Labour.