<P> First World War lieutenant's rank insignia (general pattern) </P> <Li> <P> First World War lieutenant's rank insignia (Scottish pattern) </P> </Li> <P> First World War lieutenant's rank insignia (Scottish pattern) </P> <P> From 1 April 1918 to 31 July 1919, the Royal Air Force maintained the rank of Lieutenant . It was superseded by the rank of flying officer on the following day . </P>

Who was rewarded with the rank of lieutenant by british government