Short answers, pulled from the story.
William Wade stated simply that the Crown means the Queen. This view contrasts with other scholars who describe it as an amorphous concept or a convenient means for conveying formal powers.
The Crown was first defined as an imperial crown during the reign of Henry VIII. The Ecclesiastical Appeals Act 1532 declared that this realm of England is an empire governed by one Supreme Head.
In parts of Canada, the Crown acts as the prosecuting party led by a Crown prosecutor or Crown attorney. Most jurisdictions in Australia use R or The King in criminal cases, though Western Australia and Tasmania bring prosecutions in the name of the respective state instead of the Crown.
The Balfour Declaration of 1926 recognized dominions as autonomous Communities within the British Empire equal in status. The Statute of Westminster 1931 enshrined a common allegiance to the Crown and established that any alteration in law touching Succession to Throne would require assent of each dominion parliament.
From 1661 to the reign of Queen Victoria, the image of St Edward's Crown was used. Tudor Crown began to be used from the 1860s and was standardized until the reign of Elizabeth II in 1952 when it was restored. Charles III opted for a modified Tudor Crown design in 2022.