This is a prospective multicentre observational study to assess the sensitivity of the UroMark assay to detect bladder cancer in participants with new or recurrent disease. The study will recruit patients with newly detected or recurrent bladder cancer. The reference standard will be histopathological confirmation of tumour stage and (Ta, T1, ≥T2) and grade 1, 2 or 3 diseases with or without CIS, or CIS alone.