Fermi at Los Alamos and the early Britain's way to nuclear energy

A novel recovery of some important documents related to the Fermi course on neutron physics, held at Los Alamos in 1945, is announced. Its relevance for the effective launch of a British nuclear programme in the early postwar period, independently of the U.S. technical cooperation (precluded by the American authorities) and warmly supported by Chadwick, is discussed.