The King is dead long live the King
The King of England can never die, so says the ancient common law of English Kingship. Henry, John, Edward and George may die the last breath of the dying King is immediately followed by the first breath of the new King.
The King is the current holder of the office of the Crown and as the office of the Crown cannot die neither can it be without a King so the common law does not permit the King to die. Hence the phrase the King is dead long live the King.
The very second King Charles I head was severed from his body his son became King Charles II. King Charles II was kept from his Throne for 11 years by Parliament and Oliver Cromwell. But on being invited to take his Throne he did not repeal any laws passed during the Republic because none of these laws had received the Royal Assent so were not law. All immediately ceased to have any effect.
In order for the King to do his job the common law of Kingship bestowed upon him authority over and above that bestowed on any subject. This authority makes the King the Supreme Governor of England and we call this higher authority the Royal Prerogative, there are those who say it is difficult to define the limit of the Royal Prerogative I disagree. The King can take any action give any order which benefits the Kingdom and the subject. The King may not in law take any action or give any order which harms the Kingdom or even one of his subjects.
King Henry VIII was an arrogant bully who regularly abused his position and exceeded his use of the prerogative, such as in the case of Richard Rose. Richard was cook to the Bishop of Rochester a friend of the Kings, the Bishop annoyed Richard who poisoned the meal killing 17 people. The correct thing was to place him on trial and if found guilty apply the sentence the law decreed. Henry VIII ordered Richard Rose taken to Smithfield and boiled alive. That is what happened to Richard Rose. This became known as an Henry VIII power. Parliament today claim to rule by Henry VIII power. The problem is these purported powers were illegal when Henry VIII used them by murdering Richard Rose, and they are still illegal now.
All other authorities, supremacies, and superiorities enjoyed by the King of England are directly as a result of his first being King of England.
King John broke the law and exceeded his authority when he and six Barons and two Bishops surrendered England to the Pope in 1213 at Dover.
In 1366 a meeting of the Estates of England comprising the Lords Spiritual, the Lords Temporal and the Commonality of England met at the request of King Edward III to decide the matter, the Estates of England did not rush the discussion but reached the only legal/lawful decision they could. England did not belong to King John he only held it in trust for those who followed on. King John broke the law his gift to the Pope was illegal and was void. King Edward III we are told wrote roundly to the Pope.
The Estates of England is the highest law giving body in the land capable of hiring and firing Kings and Parliaments.
This one major constitutional ruling makes every EEC/EU treaty illegal and void.