In July 1946, the Chiefs of Staff Committee recommended that Britain acquire nuclear weapons. They estimated that 200 bombs would be required by 1957. Despite this, and the research and construction of production facilities that had already been approved, there was still no official decision to proceed with making atomic bombs. Portal submitted a proposal to do so at the 8 January 1947 meeting of the Gen 163 Committee, a subcommittee of the Gen 75 Committee, which agreed to proceed with the development of atomic bombs. It also endorsed his proposal to place Penney, now the Chief Superintendent Armament Research (CSAR) at Fort Halstead in Kent, in charge of the bomb development effort, which was codenamed High Explosive Research. Penney contended that "the discriminative test for a first-class power is whether it has made an atomic bomb and we have either got to pass the test or suffer a serious loss of prestige both inside this country and internationally."