Born on 29 Jul 1898 in Bengeo, Hertford and christened on 21 Aug 1898 in Bengeo, son of Owen Edward and Gertrude Ann (Haldenby) Rose. He had a sister Sybil. He was living in 30 Trinity Grove, Hertford in 1901 and his father had his own business as a printer and stationer. Later he was living at “Kilravock," Bengeo, Hertford. In 1911 Alan was a boarder aged 12 years in The Convent, Lower Addiscombe Road, Woodside, and Croydon.