Johns was also a regular contributor to "The Modern Boy" magazine in the late 1930s as well as editing (and writing for) both "Popular Flying" and "Flying". From the early 1930s Johns called for the training of more pilots, for if there were not enough when war came, "training would have to be rushed, and under-trained airmen would die in accidents or in combat against better trained German pilots." He was removed as editor at the beginning of 1939, probably as a direct result of a scathing editorial, strongly opposed to the policy of appeasement and highly critical of several Conservative statesmen of the time. Cockburn, however, feels that the government was concerned about being so "expertly attacked" on the lack of trained pilots by the editor of the most widely read aviation magazines in the world, including readers "in the RAF or connected with flying."