This document discusses the types of laws in the English legal system, including statutory and common law, civil law and criminal law, and public law and private law. It also explains the main principles relating to criminal law and the structure of magistrate court and crown court. Additionally, it describes the route of appeal in the criminal court structure and the roles and responsibilities of public services in relation to the criminal justice system. The document outlines different ways to measure the effectiveness of the criminal justice system and explains the use of performance data in evaluating its performance.