This report delves into the realm of market entry strategies within the United Kingdom, focusing on how industries can establish and maintain competitive advantages. It begins with an introduction outlining the background, aims, objectives, and research questions, followed by a rationale for the study. A comprehensive literature review explores global-based market entry strategies, using Marks and Spencer as a case study to illustrate strategies, challenges, and successful approaches. The research methodology section details the research philosophy (positivism), approach (deductive), and choice, along with the research strategy, time horizon, data collection methods, sampling, and ethical considerations. The report concludes with a budget and references, providing a thorough analysis of the factors influencing effective market entry and sustained competitive advantage in the UK.