 RT planning will be carried out using standard procedures at the Oncology Department. However, each study patients CT Scan image will be placed in the Virtual Environment for Radiotherapy Training VERT system. The original images will not be altered and will be presented using the established JImage Dicom libraries. 3D models will be constructed from the CT Images. The system allows moving the 3D images using a mouse. Planning CT Scans will be taken prior to RT, on the first 3 days, and once weekly during RT to measure bladder volumes this is standard practice and no patients will have extra CT Scans. The investigators will assess whether patients in the study arm were more compliant in holding water when compared to control cases. 