Fifty years after the production of Circular 10/65, which confirmed comprehensive education as the national policy for secondary education in England and Wales, it is possible to trace the idea of comprehensive education from the 1940s to the 1960s, to understand the position of the Labour Party in its development, and to assess the nature of the contribution of Circular 10/65 itself to comprehensive education in Britain. There were strong connections between the 1944 Education Act and Circular 10/65. In particular, Michael Stewart, the Labour Party education policy review of 1957-1958, and the 1958 report "Learning to Live" that arose from this, played a key mediating role. Awareness of public opinion through the then novel device of market research and a determination to consolidate ambitious reforming ideals into a practical strategy for educational reform over the longer term formed part of the party's revisionist approach under Hugh Gaitskell, and helped to provide the basis for Labour's policy on comprehensive education when it returned to power in 1964.