This report provides a comprehensive overview of leadership and management concepts, comparing the functions and features of leaders and managers, and highlighting the differences between them. The report delves into the roles of leaders and managers in various organizational situations, illustrating these with examples. Furthermore, it explores different leadership theories and models, such as contingency, situational, and systems leadership, and their application within the context of Marks & Spencer (M&S). The report analyzes how these theories are used to manage conflicts, assign tasks, and build effective teams within the organization. The report is structured with an introduction, tasks addressing the core concepts, and a conclusion summarizing the findings, providing a solid understanding of leadership and management principles and their practical application in a real-world business setting.