If you need to tell your readers something … there are only two characters that you can put it convincingly into their dialogue. One is Hermione, the… - J.K. Rowling

Never forget, Sturgeon, her government and supporters have insisted that it is ludicrous to imagine anyone would dress in women's clothes to get access to vulnerable women and girls. Wouldn't happen. Everyone is who they say they are. To question this is hate.

But, as many women have said before me, 'woman' is not a costume. 'Woman' is not an idea in a man's head. 'Woman' is not a pink brain, a liking for Jimmy Choos or any of the other sexist ideas now somehow touted as progressive. Moreover, the 'inclusive' language that calls female people 'menstruators' and 'people with vulvas' strikes many women as dehumanising and demeaning. I understand why trans activists consider this language to be appropriate and kind, but for those of us who've had degrading slurs spat at us by violent men, it's not neutral, it's hostile and alienating.

Remember, if the time should come when you have to make a choice between what is right and what is easy, remember what happened to a boy who was good, and kind, and brave, because he strayed across the path of Lord Voldemort. Remember Cedric Diggory.