With Mummy going to hold on to the very end, and her family history is to go at a good age, he will never make King and you will get one of his, I understand, quite capable sons at the helm, and be saved his cock-up's.
Constitutionally Charles would have to either abdicate or die before William can become King.
The Queen will probably stay on the throne until she becomes the longest serving monarch.
Speedbird48, I would love to sit in either the SIM or the a/c and watch you perform when you only get/got as much consolidation and practice flying as Charles does/did.