This report provides a comprehensive overview of Small and Medium Enterprises (SMEs) in the United Kingdom, defining their characteristics based on employee numbers, turnover, and assets. It outlines the UK government's categorization of SMEs and their substantial contribution to employment and revenue generation. The report delves into the impact of SMEs on the UK economy, including their influence on turnover, employment, and overall business growth, while also highlighting government support through schemes like R&D tax credits. Furthermore, the document explores intrapreneurship, its significance in both public and corporate organizations, and its role in fostering innovation and employee engagement, concluding with recommendations for leveraging new technologies such as AI and machine learning. This report is a valuable resource for students studying entrepreneurship and business development.