Eisenhower and Macmillan agreed to form a study group headed by Sir Richard Powell, the Permanent Secretary to the Ministry of Defence, and Donald A. Quarles, the United States Deputy Secretary of Defense, to consider how the deployment of IRBMs to Britain might be expedited. Another study group, under Strauss and Sir Edwin Plowden, the head of the UKAEA, would investigate nuclear co-operation and the exchange of nuclear information. The personal relationship developed between Plowden and Strauss would be crucial in converting the latter over to the idea of providing information to Britain.