This training manual provides guidance to trainee police officers on police powers and procedures related to stop and search, arrest, detention, and questioning of suspects. It explains that police have specific investigatory powers governed by legislation like the Police and Criminal Evidence Act 1984 and related codes of practice. The manual discusses the need to balance these police powers with individual rights, and outlines the key sections of acts and codes that provide the legal framework for stop and search procedures, detention, and questioning of suspects in accordance with safeguards for individual rights.