This report examines organizational behaviour within the context of British Gas and EDF, two major UK energy companies. It analyzes different leadership styles, including transformational and transactional approaches, and compares their impact on employee behaviour and performance. The report delves into organizational theories, such as Fayol's theory, and evaluates management approaches like the classical and social system approaches. Furthermore, it explores the impact of leadership styles on organizational motivation during times of change, compares various motivational theories, and assesses their usefulness for managers. The report also investigates the nature of groups and group behaviour, factors promoting effective teamwork, and the impact of technology on team functioning within the two organizations. The conclusion summarizes the key findings and emphasizes the importance of understanding organizational behaviour for enhancing employee performance.