Revealing mistakes: In the shot showing Elizabeth leaving Whitehall after Edward becomes king, her carriage becomes transparent (due to the matte painting of trees and sky behind it).
Factual errors: In the film, young Bess is mostly referred to as "Princess Elizabeth". In history, Elizabeth was denied that title from the age of three. Her father Henry VIII declared his marriage to Anne Boleyn invalid before her execution for treason, thus Elizabeth was declared illegitimate and only to be called "Lady Elizabeth".
Factual errors: The royal badge on Barnaby's livery consists of a crowned Tudor rose with four red-and-white petals, but the real Tudor rose emblem had five petals, the crown flush with the top petal.