Ged Martin, the British scholar of (mostly) Commonwealth histories, diverges a moment from his usual range of topics to provide a very detailed history of the emergence of the pardon power now being used for malign purposes by Orange Hitler.
It's far more detailed than any such explanation I have seen in American media. It may also be more than you actually want to read on the subject. But it will reinforce in you the assumption that Ged Martin seems to know a great deal about practically everything.
