This report delves into the profound implications of Brexit on the United Kingdom's parliamentary sovereignty. It examines the core principle of parliamentary sovereignty, which grants the UK Parliament supreme legal authority, and analyzes how this authority has been affected by the UK's departure from the European Union. The report explores the arguments surrounding the UK's newfound independence, contrasting claims of regained sovereignty with potential limitations and challenges. It discusses the viewpoints of various stakeholders, including the ex-president of the EU, Claude Juncker, and considers whether the UK's independence is a genuine shift or merely a superficial change. The analysis incorporates relevant court decisions to support the arguments and provide a comprehensive understanding of the legal and political landscape post-Brexit. The report assesses the practical operation of parliamentary sovereignty in the UK context, and the extent to which the UK can truly operate independently of the EU. It also considers various aspects such as trade, immigration, and financial services as well as the economic impact of Brexit.