Everyone seems to have an opinion on transgender people these days - from Germaine Greer to Jeremy Clarkson, they have all offered up their thoughts on trans people. Ian McEwan is the latest.

As a fan of his books and a trans woman myself, I’m very grateful. After all, he seems to have spent a whole five minutes thinking about people like me before sharing all his ill-informed ideas about us with the rest of the world.

“The self, like a consumer desirable, may be plucked from the shelves of a personal identity supermarket, a ready-to-wear little black number,” he said. “For example, some men in full possession of a penis are now identifying as women and demanding entry to women-only colleges, and the right to change in women’s dressing rooms.”

Is he for real? Does McEwan realise that he has almost certainly shared a lavatory with a trans man before? That his female friends and relatives have been sharing loos with trans women like me for years? Anyone who has seen the Danish Girl will know that people have been having “sex changes” since the 1930s. Where does McEwan think they’ve been going to pee?