Cognitive-behaviour therapy (CBT) is increasingly being used with people with learning disabilities. One of the challenges in working this way is effectively sharing and understanding the formulation of the client's problem. One could argue that only with a shared understanding can there be collaboration between the therapist and the client. By utilizing current theory around CBT for psychosis and CBT for people with learning disabilities, a diagram that was understandable to the client was developed to illustrate each formulation. The aim of the paper is to describe a method for engaging in a collaborative approach with three men with psychosis utilizing current thinking in CBT for people with learning disabilities and CBT for psychosis.