Air Vice-Marshal Kenneth Malise Saint Clair Graeme Leask began his career as a World War I flying ace

Flying ace

A flying ace or fighter ace is a military aviator credited with shooting down several enemy aircraft during aerial combat. The actual number of aerial victories required to officially qualify as an "ace" has varied, but is usually considered to be five or more...

 credited with eight aerial victories. He flew over 100 sorties, and survived being shot down three times. He attained the rank of Captain, and position as Flight Commander, in No. 84 Squadron. He remained in the RAF after the war, finally ascending to Director General of the Air Ministry and attaining the rank of Air Vice-Marshal.