This article explores the transformation of the United Kingdom’s international identity in the post-Brexit era, focusing on the tension between the reassertion of national sovereignty and the strategic deployment of soft power. Brexit was promoted as a reclamation of British autonomy from supranational EU structures, but it also posed a challenge to Britain's traditional global influence. The article analyses how Britain has attempted to reinvent its international role through diplomatic realignments, strategic global branding ("Global Britain"), cultural diplomacy, and renewed Commonwealth engagement, while grappling with diminished influence in Europe. It also examines the UK's normative influence regarding liberal democracy, human rights promotion, and cultural exports such as education and media. The article concludes by evaluating whether the UK can maintain global relevance by balancing sovereignty and soft power or if its international identity is now constrained by the limitations of post-Brexit isolation.