Airpolice
In my time, the SWO was a product of the GD trade group. They were the result of a great many shifts spent as Guardroom staff and Drill instructors.
The SWO at Cottesmore circa 1972 was an ex Air Gunner - very nice guy
and undoubtedly he had transferred to GD to remain in the RAF.
Replaced by Jack Holt LOL - a different sort of SWO (although he actually was quite a nice guy too )