Goofs

The orb and sceptre as well as the crown are placed on a monarch's coffin. Here they are absent.

William is wearing a plain crimson sash with his Irish Guards uniform in the coronation scene. He should be wearing the crimson-and-gold State sash on this most formal of occasions.

In one scene, the new king to succeed Charles III is referred to as King William IV. This is incorrect. He would be King William V. There was already a King William IV, 1830-1837.

The reference to King William IV was not to the future King William, but to the historical King William IV. The opposition leader suggested that Charles research how William IV dealt with his own conflict between crown and Parliament. In 1831, corruption amongst the ministers prompted the king to exercise his prerogative of dissolving the Parliament. The House of Lords was preparing to adopt a resolution against dissolution when William entered the chamber in person, cutting off debate, and declared the body dissolved. The scene in this production where King Charles enters Parliament to make the same declaration is deliberately patterned after that event.

The prop Instrument of Abdication shown has been copy and pasted from that of King Edward VIII. This means the phrase about renouncing the throne also for his descendants has been left in, meaning William could not succeed Charles.