The initial therapy protocol has been developed by psychologists with expertise in CFT, alongside people with lived experience of hearing voices and having distressing beliefs. However, it will continue to be developed and evolve as the study progresses, and as more is learnt (e.g. from the service-user participants) about applying the model in this population. At the end of this study, the aim is to have all the information needed to run a randomised controlled trial of this therapy.