What is the theme in A Taste of Honey by Shelagh Delaney?

Alienation and loneliness is a theme. Jo has essentially been abandoned by her mother. This has been a life-long pattern, but it becomes overwhelming when Helen moves her daughter to a new flat just before Christmas and then leaves almost immediately with her boyfriend. Jo's loneliness directly leads to her pregnancy. When her mother, Helen, leaves with Peter, Jo dissolves into tears. The young black man, who professes to love her, appears, and Jo invites him to stay with her for the Christmas holidays.