This report provides a comprehensive review and critique of operations management at Marks & Spencer (M&S). It begins with an introduction to M&S, followed by a differentiation between operation and operations management. The report then evaluates the implementation of operations management principles within M&S, analyzing how well the organization meets its requirements. A discussion on continuous improvement as a philosophy and a description of Lean principles are included, with a focus on value definition, creating flow, and the application of Six Sigma. The report further explores the utilization of lean production techniques, such as just-in-time production, and agile manufacturing strategies. Finally, the report outlines a continuous improvement plan with justified recommendations for improvement based on the review and critique of operations management principles within M&S.