This Mental Health Toolkit may be used by any primary care professional or general practice in the UK. It is designed to collate resources which inform and support delivery of high quality mental health care in the primary care setting. It is arranged by clinical topic, and there are also sections collating important national and international guidelines and key documents for those involved in service design and commissioning. Patients, carers, and GPs concerned about their own mental health, may also find the toolkit useful.