At the AWTSC meeting on 7 December 1956, Martin suggested that the committee be reconstituted. A three-person Maralinga Safety Committee chaired by Titterton, with Dwyer and D. J. Stevens from the Commonwealth X-ray and Radium Laboratory as its other members, would be responsible for the safety of nuclear weapons tests, while a National Radiation Advisory Committee (NRAC) consider public health more generally. This reflected growing disquiet among the scientific community and the public at large over the effects of all atmospheric nuclear weapons testing, not just those in Australia, and growing calls for a test ban. Nonetheless, Operation Buffalo had attracted little international attention. The British Government rejected calls for a moratorium on testing, and announced at the US-UK talks in Bermuda in March 1957 that it would press on with the Operation Grapple hydrogen bomb tests. Martin's proposal was accepted, and the composition of the new NRAC was announced on 7 July 1957. John Moroney was appointed secretary of both committees. The AWTSC continued to report to the Minister of Supply, while the NRAC reported directly to the Prime Minister.