With a POD of no earlier than 1905 (when he claimed to have received "transmissions" that caused him to write The Book Of The Law), make Aleister Crowley Prime Minister by 1930 (age 55) at the very latest.
Perhaps if his friendship with JFC Fuller gets him better known?
Well, Fuller was a highly praised officer, until his turn to Fascism.Nothing better than a close association with a senior member of the British Union of Fascists to kick-start a career at Number 10, eh?