He worked in the Fighter Command HQ underground operations room and handled secret Ultra material from Bletchley Park.
He assembled information about German long-range weapons, going to France and Belgium in late 1944, to investigate captured sites.
After leaving the RAF in 1948, he went to the Cabinet Office as a historian and wrote the official history volume The Defence of the United Kingdom; giving his address in the preface as Falmer, Sussex.
[3] His books Barren Victories and The Lion and the Eagle emphasize the importance he saw in the "Anglo-Saxon" alliance of Britain and America.
[5] Personal information from his books Barren Victories, The Battle of the V-Weapons, Hidden Weapons and The Lion and the Eagle (dust jackets).