The nightmare scenario is that Starmer gets fined by Durham police early next week and resigns along with Rayner.
Johnson calls GE in desperation.
Believe me if Starmer gets fined he will be desperately looking for an excuse not to resign, Johnson calling a snap election would be the perfect excuse.
Although Johnson won’t be calling a snap election as I don’t doubt that the Queen would be advise not to dissolve parliament until the PM’s position was established. The PM remains PM even after parliament has been dissolved. The Tories could still remove Johnson as leader even if parliament is dissolved.