Unsurprisingly, almost no new stations were started during World War II, the sole exception being on Jersey where a service was set up to relay church services, musical recitals, variety shows, and programmes for children to nine hospitals after wireless receivers had been banned and confiscated by the German occupying authorities.
Many stations now played gramophone music to patients and, with the launch of the cassette tape in 1963, it became easy for presenters to record their programmes for playback at a later date.
New studios were built, often to a high specification, and in common with commercial radio, hospital stations began to use CDs to play music.
In the past, hospital radio tended to be delivered to patients' bedsides by way of a dedicated cable link from the in-house studio to a unit beside every bed.
Some broadcast, others work to keep the station's record library or computer systems up-to-date, but most also visit the hospital wards, to discuss the music that patients would like to hear, and to provide an opportunity for the latter to converse with a member of non-medical staff.
Each year, the UK-based Hospital Broadcasting Association, invites its member stations to submit entries in ten categories.