This report investigates the drivers and impacts of organisational change, using case studies of Morrisons and ASDA, two leading UK supermarket chains. It examines the internal and external factors driving change, including technological advancements, customer demands, and competitive pressures. The report also analyzes the impact of change on organizational strategy and operations, leadership, individual and team behavior, and the application of appropriate models to process change efficiently. The report concludes by discussing the advantages and disadvantages of different leadership approaches to dealing with change, illustrated by application to a range of examples.