This assignment provides a comprehensive analysis of retail supply chain management in the UK, focusing on four major retailers: Tesco, Sainsbury's, Aldi, and Lidl. The document examines the use of technology, including Electronic Data Interchange (EDI) and Radio-Frequency Identification (RFID), to manage warehouse access and logistics. It also discusses the importance of warehouse management systems in optimizing supply chain efficiency. The analysis highlights the benefits of adopting EDI solutions and RFID technology in managing warehouse access and sending alerts. Furthermore, it provides information on how Aldi is using traffic light queueing systems to limit the number of customers in stores during social distancing measures.