Some publicity seeking extremist from a supposedly nonviolent climate and ecology group has thrown eggs at the King! That's treason.!!!!
In research from "Yahoo!News" I found this, "Under the Treason Act (Ireland) 1537, you can technically be imprisoned for something so simple as writing or saying that you wish harm upon either the Queen (now King) or her (now his) heirs." So, surely throwing eggs at King Charles is a more aggressive and visible act of treason than just writing about harming him.
Therefore, let's hope that this demonstrator gets a long sentence in the Tower.
I doubt it though in our weak present day society.