The son of Edward Douglas and Margaret Caroline Prothero, Phillip Bernard Prothero with Princess Louise's 4th Argyll and Sutherland Highlanders. 2nd Lieutenant Prothero received Royal Aero Club Aviator's Certificate 1906 on a Caudron biplane at Ruffy-Baumann School, Hendon on 17 October 1915. Posted to 24 Squadron, he scored his first two victories flying the Bristol Scout in 1916. The following year, flying the S.E.5, he downed six more enemy aircraft. In his final dogfight, his aircraft was last seen spinning earthward with its wings shot off by a member of Jasta 27.
When asked why he always wore a kilt on combat missions, Prothero replied "You wouldna have me taken prisoner in disguise would you now laddie?"
Great Britain, Royal Aero Club Aviators’ Certificates, 1910-1950
British Army WWI Medal Rolls Index Cards, 1914-1920