is both clinically and cost-effective, relative to sleep hygiene advice on its own. We have chosen practice nurses instead of GPs based on previous successful trial experience with this professional group and with cost-effectiveness and scalability in mind. Practice nurses are increasingly involved in chronic disease management (where sleep disturbance is a common comorbidity) and the delivery of brief behavioural interventions in primary care. While previous studies in UK primary care show multicomponent CBT to be effective when delivered by nurses,counsellors or through self-help CBT booklets, there has been no large-scale evaluation of the clinical and cost-effectiveness of a brief and scalable behavioural intervention.