I don’t get worked up about small inaccuracies in period dramas because honestly, most contemporary dramas can’t even present the world we live in now accurately. How am I supposed to criticise a movie set in the year 1922 for portraying a specific model of radio three years before it was invented when movies set in the year 2019 struggle to correctly depict how a cell phone works, in spite of both the writer and the actor presumably owning one?