HM has far more power than he ever employs, as all the Royal Prerogatives & Reserve Powers remain on paper,
it's just that the House of Windsor has a policy of never invoking those powers,
in fear of a revolt in the face of it,
dating back to George V founding the House of Windsor and reforming the monarchy therein,
in the wake of the Bolsheviks murdering his cousin Nicky and family,
tho I would suggest that this deep seated fear is overwrought at this juncture,
just like Donald Trump, it would simply take a King who was willing to push the envelope, test the limits.
and the public would actually go along with it far more than the Windsor's surmise,
because the masses are no longer democratic, the masses are now tribal,
so all a monarch would have to do is side with the dominant tribe, and they would go to war for him,
if it can happen in America, it could easily happen in the British realm,
all it would take is a royal like Prince Andrew ascending to the throne, for example
because one Royal Prerogative that the Windsor's decline to invoke,
is that the monarch cannot be charged with a criminal offence,
constitutionally, you cannot arrest the monarch, you cannot compel the monarch to testify
and you cannot charge the monarch with a crime,
pretty sure a King Andrew would have invoked that by now,
and in actual fact, it's sort of being invoked by default,
since how is it that Prince Andrew has not been charged for being a child rapist ?
it's de facto even if not de jure at this point, because if he wasn't Prince Andrew, he'd be in jail by now,
that Royal Prerogative is creeping, without the royal family having to invoke anything formally