Royal Observer Corps
In 1929 the control of the Observer Corps passed from the county police forces to the Air Ministry, although Chief Constables retained responsibility for personnel and recruitment matters. 1 March 1929 saw the establishment of the new "Headquarters of the Observer Corps" at Hillingdon House, RAF Uxbridge in the west of London, and Air Commodore Edward A D Masterman CB CMG CBE AFC RAF (Rtd) was appointed as the first commandant of the Observer Corps. "Air Cdre" Masterman held this appointment until his retirement on 1 March 1936, and was succeeded by Air Commodore Alfred Warrington-Morris CG CMG OBE AFC RAF (Rtd), who would lead the Observer Corps through the critical period during the Second World War which saw the RAF emerge bruised but victorious following the Battle of Britain of 1940.
Percy Bernard, 5th Earl of Bandon
In December 1945 the Earl became the fifth Commandant of the Royal Observer Corps, taking over from the retiring Air Commodore Finlay Crerar. The Earl assumed command of the Corps at a time when it had been officially stood down from duty and placed on a care and maintenance basis. Although a period of stand-down had been ordered the Corps was not completely disbanded, as it was anticipated that the ROC must continue as an essential component of the UK’s future post-war air defence system.