IC: You see, if Elizabeth II hadn't been assassinated back in the 1970s, she might very well be alive to this day. You see, her mother made it over hundred and her widower is also still living. So it's entirely possible that George VII wouldn't be a decade-long serving king, but rather be kind of an eternal heir apparent, still being Prince Charles at 63 years of age who'd better abdicate in favor of one of his children to make way for a younger and fresher monarch.
So what do you think? What would this hypothetical not-yet-king have been different from the king we know today without the premature death of his mother?