Character mistake: On the classroom blackboard, "government" is misspelled as "goverment." (00:08:00)
The Haunting of Bly Manor (2020)
1 character mistake in season 1 - chronological order
Starring: Andrew Neil McKenzie, Victoria Pedretti
Factual error: The British schoolroom has a UK flag at the front. American schools might do that; UK schools don't. There's even a little one on the teacher's desk.
Trivia: The character of Dani Clayton is named after Jack Clayton, who directed "The Innocents." "The Innocents" is the film adaptation of the stage version of Henry James' "The Turn of the Screw." (Source: ScreenRant).