On 1 March 1917 appointed
flying officer while still temporary second lieutenant. He was then assigned to
No. 20 Squadron RFC to pilot a
Royal Aircraft Factory FE.2d. He scored his first victory on 8 June 1917, with
Edward Sayers manning the observer's guns. Durrand scored three more wins while flying a FE.2, with number four coming on 21 September. He then upgraded to another two-seater fighter, the
Bristol F.2, and scored again almost immediately, on the 27th, with observer
William Benger as his gunner. Durrand scored twice more with the Bristol, ending his victory string on 8 November 1917. His final tally was two enemy planes driven down out of control, and six destroyed (including one shared with
Reginald Makepeace). ==Postwar==