This case study examines the growth, development, and challenges faced by MRT CASTINGS LTD., a small and medium-sized enterprise (SME) in the UK. It explores the company's history, current operations, and strategies for achieving growth. The study also analyzes the external factors influencing the SME sector, including political, economic, social, technological, environmental, and legal factors (PESTEL). Additionally, it investigates the government support measures available to SMEs in the UK and how these measures can help overcome challenges. The case study concludes with recommendations for MRT CASTINGS LTD. to further enhance its growth and competitiveness.