The latest legal and political developments within the United Kingdom suggest that the country is about to embark upon a programme of significant constitutional reform. Such will systematically redefine the relationships between Government, Parliament, and the judiciary; as well that between Westminster and the UK Nations’ devolved administrations. In parallel, the traditional paradigms between legal and political constitutionalism will change in the imminent future within the UK. However, such developments have the potential to ostracise UK Nations. Further, the growing independence movements in Scotland and Wales have consequences for the future EU-UK working relationship. This article maps the proposed constitutional reforms and shifting constitutionalism paradigms; and how asymmetrical quasi-federalism is now becoming more likely if the UK Union is to endure and prosper. However, such also concludes that if Westminster relies on legal sovereignty, in forcing its will upon the devolved Nations, such has the potential to further fuel independence movements, particularly from those UK Nations that desire deeper regulatory alignment with the EU.