Liddell settled in Liverpool with Phyllis and their twin sons, residing in Merseyside until his death. When his father died in January 1951, Liddell arranged for his mother, sister, and younger brothers to relocate to the city, concentrating his family in the region. While still a player, Liddell was appointed a Justice of the Peace for Liverpool in 1958 and contributed a column to the Echo's football edition. He became occupied with voluntary work, which entailed him being an occasional disc jockey for the Women's Voluntary Service at Alder Hey Children's Hospital, working for local youth clubs, and teaching at a Sunday school. Although religious, Liddell had not been a lay preacher as some believed. His wife dismissed it as a misapprehension, recalling that, while Liddell had abstained from drinking and smoking, he had not objected to others doing so in his presence and never "rammed any of his views down people's throats." After retiring in 1961, Liddell served as assistant permanent secretary and bursar to the University of Liverpool until 1984, and authored a memoir, titled "My Soccer Story".