Brexit in chaos as Tory MPs trigger vote of no confidence in May

[nitpicker]

5. Probably not right away

If I understand correctly, this is a no confidence vote in the leadership of the Conservative Party in Parliament.

If May loses this vote, this would trigger a ballot for new leadership.

Wikipedia definition of something triggering a general election:

Traditionally, in the Westminster system, the defeat of a supply bill (one that concerns the spending of money) is seen to automatically require the governmentt to either resign or ask for a new election, much like a non-confidence vote. A government in a Westminster system that cannot spend money is hamstrung, also called loss of supply.