Treatment for insomnia in Improving Access to Psychological Therapies (IAPT) services

INTERVENTION: 1. Patients randomised to group CBT‐I will attend 5 weekly 90 minute sessions in a class of up to 16 participants. The group CBT‐I intervention will follow a manualised treatment protocol used in three previous treatment trials and will include education about sleep and common CBT‐I components such as stimulus control, sleep restriction, and cognitive therapy strategies delivered by the IAPT low intensity workers. 2. Patients randomised to treatment as usual will receive advice and treatment for insomnia routinely provided within primary care and IAPT services CONDITION: Insomnia ; Mental and Behavioural Disorders ; Insomnia PRIMARY OUTCOME: Sleep efficiency at end of treatment. This is calculated as the percentage time in bed that is reported by the patient as spent asleep. SECONDARY OUTCOME: 1. Sleep efficiency at 20 week follow‐up. This is calculated as the percentage time in bed that is reported by the patient as spent asleep. ; 2. Total Sleep Condition Indicator (SCI) score, and response and remission on the SCI post‐treatment; 3. Patient Health Questionnaire Depression Scale (PHQ‐9) scores at post‐treatment and follow‐up; 4. Patient Health Questionnaire Generalised Anxiety Disorder Scale (GAD‐7) scores at post‐treatment and follow‐up; 5. Work and Social Adjustment Scale (WASAS) at post‐treatment and follow up; 6. Satisfaction post‐treatment with the treatment and service received for insomnia INCLUSION CRITERIA: 1. Self‐reported concern about difficulty getting to sleep and/or staying asleep of at least 3 months duration 2. Age 18 or over 3. Good enough understanding and use of English to be able to benefit from a psychoeducational group delivered in English