Mental health issues are the third most common reason for consulting a general practitioner (GP), after respiratory disorders and cardiovascular disorders (Department of Health, 1991; Hemmings, 2000). A quarter of routine GP consultations relate to people with a mental health problem, most commonly depression and anxiety. It has been estimated that each year, one in 15 women and one in 30 men will be affected by depression, and every GP will see between 60 and 100 people with depression (Department of Health, 1999). A survey of 325 GPs conducted by the Mental Health After Care Association in 1999 found that 30% of their time, roughly 1.5 days a week, is spent working on patients' mental health problems, particularly relating to anxiety and depression (Davidson, 2000).The direct costs of treating depression in the UK in the early 1990s was estimated to be around £400 million a year and the indirect costs, including mortality costs and lost productivity was £3000 million (Kendrick, 2002). Standard two of the National Service Framework for mental health (Department of Health, 1999) states that: 'Any service user who contacts their primary health care team with a common mental health problem should: 1) have their mental health needs identified and assessed; 2) be offered effective treatments, including referral to specialist services for further assessment, treatment and care if they require it' (p. 28). To achieve this, primary