Violent disorder is a statutory offence in England and Wales.
It is created by section 2(1) of the Public Order Act 1986.
As to particularisation, see R v Mahroof [1988], 88 Cr App R 317, CA.
Before 1 January 2006 this offence was classified as an arrestable offence by virtue of section 24(1)(b) of the Police and Criminal Evidence Act 1984.
A person guilty of violent disorder is liable on conviction on indictment to imprisonment for a term not exceeding five years, or to a fine, or to both, or, on summary conviction, to imprisonment for a term not exceeding six months, or to a fine not exceeding the statutory maximum, or to both.