The special exception which exists in the Criminal Justice Act 1988 (Sec. 139) for folding knives (pocket knives) with blades less than 3 inches (76mm) long, is another ''common sense'' measure accepting that some small knives are carried for general utility; This exemption however only applies to folding knives without a locking mechanism. The wording of the Criminal Justice Act does not mention locking and so the definition of ''folding pocket knife'' was settled through case law. In the Crown Court appeal of Harris v. DPP (1992) and the Court of Appeal case of R. v Deegan (1998) the ruling that 'folding' was intended to mean 'non-locking' was upheld. As the only higher court in England and Wales to the Court of Appeal is the Supreme Court, the only way the decision in R. v. Deegan could be overturned is by a dissenting ruling by the Supreme Court or by Act of Parliament.

Is it true that is it legal to carry a pocket knife in england?
yes