While the pace of research eased as the war entered its final phase, scientists were still in great demand, and it fell to Anderson, Cherwell and Sir Edward Appleton, the Permanent Secretary of the Department of Scientific and Industrial Research, which was responsible for Tube Alloys, to prise them away from the wartime projects in which they were invariably engaged.[104] A British Mission led by Akers assisted in the development of gaseous diffusion technology in New York.[105] Another, led by Oliphant, who acted as deputy director at the Berkeley Radiation Laboratory, assisted with the electromagnetic separation process.[106] As head of the British Mission to the Los Alamos Laboratory, Chadwick, and later Peierls, led a multinational team of distinguished scientists that included Sir Geoffrey Taylor, James Tuck, Niels Bohr, William Penney, Frisch, and Fuchs.