This workshop is for anyone who needs to contour the prostate including trainee oncologists, established oncologists, contouring radiographers. Contouring variability is the largest remaining error in radiotherapy and so continuous learning and improvement are critical to a high quality radiotherapy service. This practically-focussed course will offer opportunities for contouring and feedback and will equip you with the knowledge and skills to contour anatomy for prostate radiotherapy. Common pitfalls will be discussed, using examples from the quality assurance process in the PACE trial. Expert radiology and anatomy input will form an integral part of this course.