The UK Biobank study has recruited 500,000 volunteers from all around the UK aged 40-69 at enrolment. This age group is being studied because it involves people at risk over the next few decades of developing a wide range of important diseases (including cancer, heart disease, stroke, diabetes, dementia). The purpose of this talk is to provide an introduction to this resource for health research and guidance on how to access and handle this data. I will also show preliminary results from current studies we are doing within the Health Behaviours team in the Nuffield Department of Primary Care Health Sciences.