Certain conditions are seemingly under-diagnosed at the point of schizophrenia diagnosis, possibly resulting from under-investigation or diagnostic overshadowing, which is more common among this group (Jones, Howard & Thornicroft, 2008). This is a widespread issue with data suggesting that at the end of 2021, a mere 35% of people with severe mental illness received annual health checks (NHS England, 2020). This points to the need for improvement in the monitoring, screening and diagnosis of physical health conditions for individuals with severe mental illness.