A Scotland Yard spokesperson told The Independent that “one female has been arrested for being in possession of a pointed or bladed article.” < A Scotland Yard spokesperson told The Independent that “one female has been arrested for being in possession of a pointed or bladed article.” <You are allowed to carry a knife in public as long as it has a blade of less than 3 inches. Hopefully, she had the wit to use a legal knife that doesn’t exceed the parameters of the law because then the most they’ll be able to get her for is criminal damage.