But could it go Elizabeth to Wills, or Elizabeth to Andrew?
"The British Constitution requires that succession passes to the oldest heir, male before female, of the reigning monarch. If there is no direct heir, the line passes through brothers or sisters of the Monarch, but excludes anyone who is Catholic or married to a Catholic."
In any case, it's really not worth wasting time pondering as Elizabeth would never renounce Charles and Charles will outlive Elizabeth.
It would be great if he abdicated to Wills shortly after being crowned though. The Brits may tolerate Wills and Kate and baby George... but how long will they be interested in supporting the crown while it rests on the heads of Charles and Camilla? Heh!
The real question is, will Charles stubbornly hold on to the throne even if he knows he is unpopular and it threatens the future of the monarchy? He just might! What do you think?
There would have to be Royal dying going on for Andrew to succeed. I think that he is currently 5th.
The Act of Succession has changed, birth order from the Sovereign is the only criteria, gender no longer matters.