“the British constitution is a fragile fabric of conventions, age-old rules and precedents with no clear framework to determine what applies when, and by whom it is decided. So far, it has worked according to the “good chaps principle”, that is, the assumption that politicians with moral integrity would interpret the essence of this muddle correctly. The British are ultimately dependent on the goodwill of the government they have elected. A prime minister who deliberately chooses not to adhere to the rules and spirit of this unwritten constitution, or who even seeks to actively undermine its principles, is an unforeseen circumstance with no effective remedy.”
These things are worth writing down clearly so that everyone knows the rules that they’re playing to.