People with intellectual disabilities (ID), particularly those with co-existing mental health difficulties, experience health inequalities and premature mortality. Cancer is a prominent cause of mortality, partially due to the difficulties this population faces in accessing screening. This paper explores the rates of colorectal, breast, cervical and prostate screening over a 28-month period within an Enhanced Physical Health Clinic (EPHC) set within a specialist ID psychiatry service in Essex, United Kingdom (UK). We examined completion of, and any barriers to screening among EPHC patients (n = 463), and compared this to population-wide screening data in the UK among people with an ID.