Millions of Britons will be invited that day to swear allegiance to the monarch. Archbishop of Canterbury Justin Welby will lead the so-called people's tribute.

The invitation will be extended to the citizens of the other 14 countries that recognize the King as head of state. A thousand Republic supporters hope to gather in Trafalgar Square on May 6, with the permission of the police, to display their banners and shout as the motorcade passes: "Not my king" The monarchy is "very important" only for 29% of the population and only for 12% of young people.