[1] Following his training, Warrington-Morris was posted as Torpedo Officer to HMS Swiftsure, the RN Flagship East Indies Station with the rank of acting commander.
[1] When RAF rank structure was reorganised in late 1919 Warrington-Morris became a wing commander and his name was removed from the Royal Navy list.
When Air Commodore Masterman stood down as commandant in April 1936, Warrington-Morris replaced him and took control of the Observer Corps during the important period immediately prior to the Second World War.
[1] On leaving the Royal Observer Corps in June 1942, Warrington-Morris was recommissioned as an air commodore in Class CC and served in the Admin and Special Duties Branch of the RAF.
From 26 December 1942 until 8 November 1944 he was deputy director of the Air Training Corps by then holding a reserve nominal rank of wing commander.
He became the sole selector and Honorary Treasurer and was to hold the financial appointment, or others on the committee, until his death 42 years later, making him the longest-serving member of the Union.