Born in 1904.

Bertream Cullum, in the 57th Battalion, Mitcham Home Guard. Photo taken 1944, this clip is from Merton Memrories, photo reference Mit_War_6.1
He was the brother of Lance Sergeant Victor John Cullum.
His youngest brother Sgt. Douglas Cyril Cullum, who lived in Waddon, was shot down & killed over Germany 12th December 1944, aged 19.
See Air Crew Remembered and the Commonwealth War Grave Commission casualty record.