Crossposted from Scruffy Atlas:
So let's say that May goes back on her word and wants an early election asap. Two dates to note: she kisses hands on the 13th and Parliament breaks up for the Summer on the 21st. Given the stupid FTPA (see provisions
here) we can therefore presumably rule out any prospect of an election being called before the Summer Recess, although 2016 is 2016. Parliament then returns briefly in September (5th) before buggering off again for Conference season (15th September to 10th October).
Anyway May is a lot of things but she's not a fool and won't want to piss away what she's strived so openly for for so long. The GB figures for the 2015 GE were Con 38, Labour 31, UKIP 13, LDem 8%, SNP 5%, Greens 4%. She would want, I would guess, a substantially larger poll lead than that (because otherwise you'd be as much at risk of losing the majority as increasing it) and for it to seem stable for there to be any chance of her going for it at all. I could be reading her wrong of course.