1. PM cannot just call a general election.
2. MPs must consent to an early election under Fixed-term Parliaments Act.
3. MPs won’t consent to an early election if it leads to a No Deal Brexit 1/
5. To prevent PM proroguing MPs must vote on a motion of no confidence. If under the FTPA a two week window to form unity Govt. 2/
7. Any extension to Art 50 period requires PM to seek or agree an extension. 3/