The UK was not an absolutist monarchy any longer. Yes the crown had influence but ultimately parliament ran the show by and large. The King was just 'front of house'.
I have always thought of Farmer George as basically quite a nice modest chap for the office. Now Georgie Porgie; that's another story.
To make a difference I would suggest looking at France and some change whereby France does not supply gunpowder or interfere with the Royal Navy.