Is there standing provision for who becomes regent if the monarch is a minor, or is that done on an ad hoc basis?
This is what the Constitution says on the subject:
"Provisions relating to the exercising of sovereign power in the event of the minority, illness, or absence of the King shall be laid down by Statute. Where on the vacancy of the Throne there is no Successor to the Throne, the Parliament shall elect a King and establish the future order of succession to the Throne."
RW1