Career
Horan joined the Royal Navy in 1910 and served in World War I taking part in the Battle of Heligoland Bight in 1914. He was appointed Commanding Officer of the cruiser HMS Coventry in 1931, Senior Naval Member on the Directing Staff at the Imperial Defence College in October 1935 and Commanding Officer of the battleship HMS Barham in 1937. He also served in World World War II as Commander-in-Chief of the New Zealand Division from December 1939 to April 1940 before retiring in 1941.
In early retirement he served as a staff officer in Combined Operations Headquarters in Richmond Terrace, London.
He was made a Central Bank in the New Year Honours 1947.