Delia Gallagher is the daughter of Sheila Jackson and Frank Gallagher. She has a fraternal twin brother, Nigel. The twins were born during Series 2's Christmas Special and were delivered by Umi Karib in the living room of the Gallagher house. Delia, like her brother, was named after a famous cookery show host. Delia Smith in Delia's case, due to Sheila's love of instructional cooking television programmes and daytime television. Sheila took the twins with her when she left Frank and the Chatsworth Estate behind in Series 4, their current whereabouts are unknown and they haven't been seen or heard from since.