Here's the problem. You seem to expect people would just go 'oh, okay. Well if the law says so, we must obey'. Even if your choice of puppet was enstated, parliament isn't going to just accept it. Even if parliament was forced guns-to-head to dissolve themselves for good, the people would just take the fight to the palace. The English are not adverse to killing their own royals if need be. More likely, your puppet would be every bit the useless, powerless national pet that royals have been for centuries now.
I very much enjoyed this telling depiction of your personally perfected England, though. Really shows everything there is to know about you.
As I said before, my secret society will infiltrate parliament and then pass an act that will change the monarchy and give the true king absolute power. So it will be done by legal means.