https://www.nhs.uk/nhs-services/hospitals/going-into-hospital/staying-in-hospital-as-an-inpatient/?ref=theferret.scot
Staying in hospital as an inpatient - NHS
If you have been referred to hospital for an operation or test and you need to stay overnight, it means you're being treated as an inpatient. When you arrive...
staying in hospitalinpatientnhs