She called out a troll who told her: “I wish you a very nice pipebomb in mailbox.”

She replied: “When you can’t get a woman  sacked, arrested or dropped by her publisher, and cancelling her only made her book sales go up, there’s really only one place to go.”

One follower asked: “Is this still because of her comments about the safety of women in toilets/changing rooms if men can use them by simply saying they identify as a woman?”

Rowling, 55, replied: “Yes, but now hundreds of trans activists have threatened to beat, rape, assassinate and bomb me I’ve realised this movement poses no risk to women whatsoever.”