The woman tweeted the menacing picture at Flack yesterday, which showed her holding a large knife up to the camera. Flack subsequently tweeted the photo to the Metropolitan police with the words “Acceptable tweet?”

Just last week, a 39-year-old man was arrested by police after he hounded Flack over the internet.

Flack, 32, has found herself the victim of multiple threats and stalker-esque incidents after her relationship with Styles, 17, attracted a flood of media attention – not to mention many negative comments about the age difference.

Some One Direction fans went so far as to send Flack death threats, prompting her to tweet: “I’m close friends with Harry. He’s one of the nicest people I know. I don’t deserve death threats.”

Image: Twitter