Roy Halliday

Vice-Admiral Sir Roy William "Gus" Halliday, (27 June 1923 – 23 November 2007) was a British naval pilot who saw service in the Second World War, in the British Pacific Fleet and subsequently became Director-General Intelligence in Britain's Defence Intelligence Staff from 1981 to 1984.

War service Halliday studied at William Ellis School and University College School before volunteering in 1939 for the Royal Navy. While he awaited his call-up papers, he worked as a trawler deck-hand on Breadwinner, out of Lowestoft. Initially entering service in 1941 as a naval rating at at Skegness, Halliday was offered a commission as an officer in the Royal Naval Volunteer Reserve and training as a naval airman. His air training took place in the United States (still formally neutral at that time) at the naval air station at Grosse Ile, near Detroit and at Pensacola, Florida. After qualifying, he was posted to a squadron of Grumman Avengers, aboard the escort carrier in the Gulf of Mexico.

After three months period on anti-submarine patrols in the north Atlantic, Halliday was posted to a shore station, RNAS Hatston in Orkney, guarding against sorties by German warships. In late 1943, Halliday's squadron was embarked on ; they sailed for the Far East, arriving at Ceylon (now Sri Lanka) in January 1944. Whelp's first lieutenant, Prince Philip of Greece and Denmark, lent Halliday a spare uniform and subsequently accompanied him on a "run ashore" in Fremantle. as he became Deputy Chief of Defence Staff (Intelligence). He was appointed a Knight Commander of the Order of the British Empire (KBE) in the 1980 Birthday Honours, and retired in 1981.

In retirement Halliday served as Director-General Intelligence at the Ministry of Defence from 1981 to 1984.