Global Nuclear Power: United Kingdom Home » Global Nuclear Stockpiles » United Kingdom The United Kingdom has possessed nuclear weapons since 1952. They currently have a stockpile of approximately 225 nuclear warheads. The United Kingdom is currently undergoing a nuclear arsenal modernization program. United StatesRussiaChinaFranceUnited KingdomIndiaPakistanIsraelNorth Korea To learn more about the United Kingdom and nuclear weapons, see what our grantees are doing below The 2021 Nuclear Notebook on the United Kingdom, which is published by the Bulletin of the Atomic Scientists and research provided by the Federation of the Atomic Scientists. The Bristish American Security Information Council (BASIC)’s work on emerging voices for inclusive international security. Articles on the Bulletin of the Atomic Scientists about AUKUS, the nuclear submarine agreement between Australia, UK, and US.