 Millington left the Football League in the summer of 1974 and moved to Northern Ireland to work in his father-in-law's business, turning out occasionally for Glenavon.His football career was ended by a car crash in 1975; his injuries resulted him being wheelchair-bound for the rest of his life and in need of constant care.He settled in Wrexham where he helped found a club for Wrexham Football Club's disabled supporters, going on to become the football club's disability officer.