During World War II, Grandad evidently served some time in the army, as he told Del he was given a double-headed coin by a fellow soldier, and his son Reg checked his blood group on his old army records, as mentioned in "Thicker than Water." However, he must have been demobbed before the end of war, as he temporarily separated from his wife and had an affair with Trigger's grandmother Alice while her husband Arthur was still fighting. During the episode "He Ain't Heavy, He's My Uncle," Uncle Albert (Buster Merryfield) shows Del a photograph of Grandad during the war. When Del asks why Grandad is wearing a vest and plimsolls, Albert answers 'Well, he'd just deserted.'
