Re: This goes to show one thing
"Fixed term parliaments are only supposed to be undone by votes of no confidence in the government, not to allow the PM to call snap elections when it suits them."
Or a vote of no confidence. Or repealing the Act. Or a new law (Statutory Instrument, anyone?) to amend it and effectively neuter it.
Also worth bearing in mind the Tories created the Act too, but now find it inconvenient.