Entering the Royal Flying Corps in 1916, Harry Alexander Rigby received Royal Aero Club Aviator's Certificate 2651 on 1 April 1916. He served briefly with 40 Squadron in August 1916 but was forced to leave due to ill health. In February 1918, he joined 1 Squadron to fly the S.E.5a. After scoring six victories, health problems struck again, forcing Rigby to leave the squadron on 17 May 1918.
Military Cross (MC)
Lt. Harry Alexander Rigby, R.F.C., Spec.
For conspicuous gallantry and devotion to duty. He has carried out many low-flying bombing raids, obtaining direct hits on enemy troops, hutments and camps. On one occasion, after attacking a large column of enemy infantry on a road with machine-gun fire, he attacked and shot down in flames a hostile scout. His work has always been carried out with the utmost keenness and determination.