Reply To: Could Prime Minister Boris Johnson break up the UK? September 2, 2019 at 3:51 pm #86639 fwippersParticipantAgreed. I think Boris may find it irresistible to call a GE. It just depends how the vote goes in the commons. He would need a decent working majority. Anything over 30 which would be 24 in reality if you strip out Sinn Fein.