Ivan, could you please elaborate how the United Kingdom´s citizens can avoid to bow their heads for "Camillas tampon" as the King other than letting His Royal Highness preceeding Her Majesty the Queen?
Me thinks, if he was allowed it, the Prince of Wales would join the Green Party. I mean, not enough that his main hobbie are doing agriculturing and riding horses (outside and inside the bedroom), but his political views are "strange".
I think Westminster has the ultimate say in deciding who can be put on the throne. If the Prince of Wales slips up (like converting to Islam), or if he dies in some sort of freak accident (hint: many people claim that the MI5 will be so expert on covert operations that no one will ever know what they actually did), or the Queen sets up a parliament-approved will that the throne passes to William instead.
If the Queen lives to be 100, the chance is Charles could be bed-ridden ill at that time and William could be a Regent in that case.