Air Vice-Marshal William Edward Theak CB CBE RAF (1898-1955) was a World War I pilot in the Royal Flying Corps and a senior officer in the Royal Air Force during World War II and the post war decade. In 1940, Theak was appointed as the Chief Signals Officer at the Headquarters of Bomber Command. In February 1944, he was promoted to air vice-marshal and given command of No. 60 (Signals) Group.