A committee was created as a response to the Frisch-Peierls memorandum. It held its first meeting on 10 April 1940, in the ground floor main committee room of the Royal Society in Burlington House in London. Its meetings were invariably held there. The original members were Thomson, Chadwick, Cockcroft, Oliphant and Philip Moon; Patrick Blackett, Charles Ellis and Norman Haworth were subsequently added, along with a representative of the Director of Scientific Research at the Ministry of Aircraft Production (MAP). The MAUD Committee held its first two meetings in April 1940 before it was formally constituted by CSSAW. CSSAW was abolished in June 1940, and the MAUD Committee then came directly under the MAP. Thomson chaired the committee, and initially acted as its secretary as well, writing up the minutes in longhand on foolscap, until the MAP provided a secretary.