This report investigates the application of business intelligence (BI) and predictive analytics in predicting market trends, using Marks and Spencer as a case study. The introduction provides an overview of the study, the company background, aims, objectives, research questions, rationale, significance, and scope, followed by the structure of the dissertation. The literature review explores the use of business intelligence and predictive analytics, market growth in the fashion industry, and relevant theories and models. The research methodology outlines the research approach, philosophy, type, design, sampling, data collection, and analysis methods. The data analysis chapter presents and interprets the findings, while the conclusion and recommendation chapter summarizes the study's outcomes and suggests areas for further research. The report emphasizes the importance of BI in decision-making, strategic planning, and predicting fashion trends, highlighting its role in managing cost-effectiveness, data transparency, and sustainable growth. The research uses both primary and secondary data collection methods to explore the topic, with a focus on technological tools, strategic planning, and predictive analysis.