Career
Lyddon joined the Royal Navy in 1930 and served in World World War II as Deputy Secretary to the Commander-in-Chief, Eastern Fleet from 1942 until 1944 when he became Secretary to the Commander, 5th Cruiser Squadron. He became Secretary to the Second-in-Command Mediterranean Fleet in 1949, naval secretary in Washington, District of Columbia in 1950 and secretary to the Commander-in-Chief, The Nore in 1952. He went on to be Executive Assistant to the Deputy Supreme Allied Commander Atlantic in 1954, Commanding Officer of the shore establishment HMS Phoenicia in 1958 and Director of Service Conditions at the Admiralty in 1960.
After that he became Rear Admiral (Personnel) at Naval Air Command in 1962, Director General of Naval Manpower in 1964 and President of the Royal Naval College, Greenwich in 1967 until his death in 1968.