The stories went off the grid when they created Richard IV who killed Richard III at Bosworth Field. They created the stories, not from history, but from comedic minds.
Stories about how they had to treat WW1 with respect and dignity and how Rowan Atkinson got so many letters of thanks from families whose relatives were in the Great War. The humour was in the trenches, not in the battles.
Because there were four George's in succession, Tony explains that no one remembers anything about them and it is a dark period in history due to the confusion about who did what.
No one remembers the Georgians, but everyone remembers the Tudors. Probably the most notable Royal family in history. From Henry VII to Elizabeth I. The be headings, the wives, the treason and treachery.