This report discusses the impact of organisational structure and culture on organisational performance, with a focus on Marks and Spencer. It also explores the behavioural approach of management and its influence on individual behaviour. The report covers various types of organisational structures and cultures, including the flat structure followed by M&S, and the four types of organisational culture according to Charles Handy's model. The report also discusses the factors that influence individual behaviour at the workplace, such as personal, psychological, organisational, and environmental factors.