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.
Finlay Crerar
Crerar was promoted to air commodore and appointed commandant of the Royal Observer Corps on 23 June 1943 when his predecessor, Air Commodore Geoffrey Ambler moved across the road at RAF Bentley Priory to RAF Fighter Command as deputy senior air staff officer (DSASO). Crerar immediately generated controversy within the ROC when his first decision was to make retirement at age fifty mandatory for all centre personnel, including the duty officers. No similar changes were to be applied to post personnel, many of whom were already in their 70s and even 80s. The furore rumbled on for the next few years, but the new policy was to remain extant until after the end of the Second World War. Crerar's vision of a younger, fitter and more flexible centre workforce became the norm during hostilities, although many forcibly 'retired' centre personnel immediately re-enlisted on local posts.