Thanks Kev

All I can tell you is that he flew Sopwith Camels and that after the war he and his brother and the two Trost brothers set up Walcot airlines in Croydon flying Ju 13fs. Perhaps he never officially transfered to the RFC/RAF is it possible that he flew as a Lancer?
Is there any detail about his service?
There is a reference to the airline here http://www.europeanairlines.no/?p=umwxhfux&paged=3