This report provides a detailed analysis of Marks & Spencer's business strategy, examining both the macro and micro environments that influence its performance. It begins with a PESTLE analysis, evaluating the political, economic, social, technological, legal, and environmental factors impacting the company, including the effects of Brexit, technological advancements, and environmental regulations. The report then delves into the internal environment using a SWOT analysis, identifying strengths such as brand recognition and product variety, weaknesses like declining sales and public perception, opportunities for global expansion and online growth, and threats from high competition. Furthermore, the report analyzes the competitive forces within Marks & Spencer's market sector using Porter's Five Forces model. Finally, the report interprets and devises strategic planning recommendations for Marks & Spencer, considering various theories, concepts, and models to enhance its competitive advantage and market positioning.