Cultural differences make it difficult for Americans to understand the law enforcement systems of other nations. A study of police discretion in the United Kingdom may help Americans define the limits of police discretion in the United States. English law is discussed in detail, with citations to relevant case law. In England, as in America, criminal statutes are overly-vague, making it difficult to determine when enforcement is expected. The English example makes clear the importance of establishing through departmental manuals and norms the proper standard of police conduct. If no established departmental standards or rules exist, there can be no censure for abuse of discretion. 144 footnotes.