This report provides a comprehensive analysis of Marks & Spencer's business strategy, examining its external and internal environments. It begins with an introduction outlining the importance of strategic planning for business success. Part A focuses on analyzing the macro-environment using PESTLE and SWOT frameworks, assessing political, economic, social, technological, environmental, and legal factors, along with internal strengths and weaknesses. Part B evaluates competitive forces using Porter's Five Forces model and proposes strategies to improve the company's competitive edge and market position. The report interprets data, applies environmental and competitive analyses, and concludes with a strategic plan based on the findings. References are included to support the analysis.