They were primarily identified by the long-hand official designation Royal Air Force Hospital Nnnnn (where 'Nnnnn' is the geographic location name).
[1] Staffing at Royal Air Force hospitals was based on the number of beds, and the work that was undertaken at that facility.
Halton, Cranwell, Matlock, Ely, and Torquay were considered separate entities from any RAF stations or bases.
Halton and Cranwell had twenty and twelve medical officers (MO) respectively, whereas the large training bases at Cosford and St Athan only had eight each.
[2] The original Royal Air Force Officers Hospital was opened at Finchley in 1919, moved to Uxbridge in 1925, and then to Torquay in 1940.