This report presents a strategic marketing audit of Vodafone UK, conducted for the Master of Business Administration module MKTM028 at the University of Northampton. The audit encompasses a thorough analysis of the macro-environment using PESTLE factors, assessing political, economic, social, technological, legal, and environmental influences on Vodafone's operations in the UK. It further delves into the micro-environment, examining the UK mobile network market, customer demographics, and key competitors like BT Group, EE, and O2. Internal analysis evaluates Vodafone's strategies, functions, and productivity, including its 5G network rollout and digital transformation initiatives. The report also includes a SWOT analysis, identifying Vodafone's strengths (e.g., 5G coverage), weaknesses (e.g., network reputation), opportunities (e.g., 5G discounts), and threats (e.g., competition). Key strategic challenges, such as maintaining a sustainable market position and implementing digital solutions, are also discussed. The report concludes by highlighting the importance of customer-centric marketing and government support for Vodafone's future growth in the UK telecom sector, referencing several academic articles and industry reports.