55,000 men in the UK are diagnosed with prostate cancer and 12,000 die from the disease each year. It is more common in Black men than White or Asian men. Diagnosing aggressive types of prostate cancer earlier could help people live longer, healthier lives. This project aims to improve the quality of care for hundreds of thousands of people tested for Prostate Specific Antigen (or PSA for short) in general practice. We will focus on improving how we pick up aggressive prostate cancer.