Yeah the Tory 1922 committee is no joke.UK brehs, why is it that your PMs all resign? Ours would never, the only way to change an Australian PM outside of an election is either for him/her to drown while out for an ocean swim (Harold H0lt, 1967), or for a leadership spill (what we call a party room vote by all the MPs belonging to the ruling party) to take place.
But you've had four in a row now voluntarily quit. I can't understand why. Stay in the job until the party throws you out and you go with some dignity intact. When you resign you admit you fukked up. But if you push it to a leadership spill, then at least you can spin the narrative of being stabbed in the back by your ungrateful, greedy friends. You go out like you're Caesar or something.
I bet she probably quietly negotiated to have her pension guaranteed