Call it the Game Of Thrones effect, or call it parallel thinking, or just call it a simple appreciation for fancy costumes and bitter hatred. Regardless of motivations, it’s been a big year for historical dramas about feuding British (and/or Scottish) royalty. First there was Chris Pine’s bloody Outlaw King, then the scandalous triangle of Emma Stone, Rachel Weisz, and Olivia Colman in The Favourite. And now Margot Robbie and Saoirse Ronan star as rival queens in Mary Queen Of Scots, the feature-film debut of theatrical director Josie Rourke written by House Of Cards creator Beau Willimon.