A corps itself was generally under the control of a higher formation such as a field army, an army group or a command. During the war, the British military contained 16 field corps and three that were intended to control anti-aircraft units.
Corps units usually came under the authority of a superior formation like a field army, an army group, or a command. In the course of the war, the British armed forces comprised 16 field corps and three designed to manage anti-aircraft units.