The record I have seen at FindMyPast is for his later RFC/RAF service and has his wife as next of kin. Buried on the second page is the fact that he served in France 1914-1917 (he joined the army in 1906) and was recipient of the 1914 Star, the British War Medal and the Victory Medal so there may be another record somewhere.
Added: also the record has him as Roman Catholic, so surely there must be a baptism record?