This report provides a comprehensive business strategy analysis for Marks and Spencer (M&S). It begins with an introduction to business strategy and its application to M&S, a British multinational retailer. The report then delves into the macro-environment using PESTLE analysis, evaluating political, economic, social, technological, legal, and environmental factors impacting M&S's operations in the UK. Next, it assesses the micro-environment and M&S's capabilities through a SWOT analysis, identifying strengths, weaknesses, opportunities, and threats. The report proceeds to evaluate competitive forces using Porter's Five Forces model, analyzing the retail sector's competitive landscape. Finally, it culminates in the formulation of strategic planning for M&S, drawing conclusions based on the preceding analyses and offering recommendations for future growth and success. The report uses academic references to support its findings.