William will take over the Duchy of Cornwall at some point (we see him being more and more involved with that), he will always have more money so to speak.
I would imagine after the death of the Queen her grandchildren would receive some sort of bequest as well (as we saw happen when the Queen Mother passed). ..then of course again upon the death of Charles.
I'm guessing any principal they rec'd from Diana is well invested.
LaRae
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