The article examines the instruments by which the “Global Britain” identity is constructed and specified in the Integrated Review of Security, Defence, Development and Foreign Policy, adopted by the UK government in March 2021. Applying role theory of foreign policy analysis by Rosenau (1987) and Walker (2013) and discourse theory by Laclau and Mouffe (1985), the authors define the mechanisms of how the Global Britain identity is shaped, with “security” being a nodal point of the discourse. It is concluded that the UK is determined to defend itself against the world of hazards and threats, but also it seeks to actively transform the global order in accordance with the British interests and values. The three pillars of the new identity are security, resilience, and reduced vulnerabilities. Moreover, it should be stressed that new foreign policy strategy identifies Global Britain as an active actor of post-COVID world, which, on the one hand, makes the strategy more adaptive and flexible, but, on the other hand, creates contradictions in Boris Johnson's policy and poses questions about its efficiency.