1904 Feb 1, The only possible birth is George Henry Caen, born Camberwell in 1904. And his father's service record shows this.
1911 census living at 61 Ulverscroft Road E Dulwich SE
His father RTS/4210 Private James Albert Caen, Army Service Corps (Remount Specials: specially enlisted because for skills with horses). Served from 1914 to 1916
3514271 Private George Henry Caen, 1st Battalion, Manchester Regiment aged 17
1921 Jun 24. Posted missing from Ballincollig, and still one of the men listed missing at theTruce.
I can find no evidence of having survived the war, unless he changed his name.