Little is known of 2/AM Middleton at this time.

MIDDLETON, JOHN. Airman 2nd Class, 65056.
59th Squadron, Royal Flying Corps.
Died 25 March 1918.
Commemorated on the Arras Flying Services Memorial in the Faubourg-d'Amiens Cemetery, Arras, Pas de Calais, France. Pre his army enlistment, John was employed by the South Eastern & Chatham Railway Company as a Clerk. source