It brought "Boudica" (2019) to mind, though this one isn’t quite as bad. “Dagan” (Aimee Lou Wood) is the ruler of a kingdom being conquered by "Humble Joan" (Nicola Coughlan, attempting an impression of Jeanette Krankie), who has found out about gunpowder. Fortunately for the deposed queen, she has a single devoted attendant, and this person – “Shulmay” (Lolly Adefope) – is clever enough to get them to safety. Then b…