Polycystic Ovary syndrome (PCOS) is a common hormonal imbalance affecting about 12% of women in the UK. The number of women with PCOS is rising. They suffer from a combination of symptoms including excess hair, irregular/absent periods, and infertility. About 70% of women with PCOS are obese or overweight, 10% develop type 2 diabetes (T2DM), and 30-40% have some degrees of abnormality in controlling (metabolising) blood sugar. Studies have shown that if women with PCOS make change to their lifestyle (diet and activity), they may reduce their risk of getting diabetes and heart disease in the future. This study aims to develop and test a programme that can be run in groups (structured education), to support women with PCOS make the lifestyle changes needed to improve their PCOS and prevent future associated health problems. Structured education programmes are suitable for use within the NHS and are already recommended for individuals with T2DM, but have not been tested as a method of treatment for PCOS which is a high risk condition for T2DM.