www.imdb.com/title/tt0517975/

Character. Andy. Convicted paedophile who is not only remorseless of his crime but considers it something to be proud of.

Long-running ITV tv series set around a women's prison.

It is one of those roles whereby you have to ignore your natural human repulsion to the character and avoid crearting a characateur by concentrating not on "what" they do but on "why" they do it.