Nuclear Weapons/Warheads: United Kingdom

The United Kingdom was the first country to undertake a serious study to create nuclear weapons, with the first theoretically sound critical mass calculation made by Otto Frisch and Rudolf Peierls in February 1940.

Britain's Maud Committee, led by Sir Henry Tizard, developed the basic principles of uranium enrichment by gaseous diffusion and fission bomb design by July 15, 1941. The Maud Committee's work attracted the attention of the U.S. government on the feasibility of...