Background: Current National Institute for Health and Care Excellence (NICE) guidelines for psychosis and Schizophrenia recommend the offer of psychological therapy with or without family intervention for those considered to be individuals at at-risk of developing psychosis. NICE guidelines for psychosis and schizophrenia in children and young people also have a specific research recommendation to investigate the clinical and cost effectiveness of combined individual and family intervention. We report here on the rationale, design and baseline characteristics of a feasibility study to investigate combined Individual and Family Cognitive Behavioural Therapy (IFCBT). for people considered to be at risk of developing psychosis in comparison to treatment as usual. Methods: The IFCBT study was a single blind, pilot randomised controlled trial (RCT) to compare a combined individual and family Cognitive Behavioural Therapy (CBT) intervention to treatment as usual. Participants were assessed using the Comprehensive Assessment of the At-risk Mental State (CAARMS) and randomly allocated to either therapy or enhanced treatment as usual (ETAU). All participants were followed up at six and twelve months. Primary feasibility outcomes were recruitment and retention of participants. Secondary outcomes included transition to psychosis and assessment of mood, anxiety and the relationship of the individual and nominated family member. Results: We report data showing entry into the study from initial enquiry to randomisation. We report the characteristics of the recruited sample of individuals (n=70) and family members (n=70) at baseline. (n=70). Conclusions: The study recruited to 92% of target demonstrating it is feasible to identify and recruit participants. Our study aimed to add to the current evidence base regarding the utility of family interventions for people at-risk of psychosis.