When rating trailers, we tend to be slightly more cautious than when rating feature films. This is because trailers come unbidden to audiences. Unlike a feature film, audiences have no choice about what trailers they are going to see when they go to the cinema - this decision lies with cinema exhibitors. However, though we tend to be more cautious, we are still essentially applying the same Guidelines to trailers, as we do feature films.
This is an important consideration to make when thinking about the rating for Josie O’Rourke’s biographical drama Mary Queen of Scots, because our guidelines state that historical contexts can often be a mitigating factor.