The requirement for Met Offices at RAF stations was driven by the Air Staff. I know for a fact that soundings were taken from Staishs from time to time, and the consensus was that Met was needed.
Of course this suited the Met Office because the observations were an important component of the national network.
The cost of offices on stations was substantially borne by the RAF until the Met Office gained Agency status c. 1980, after which we charged an arm and a leg.
The bottom line was that if a Staish had a Met office and took its advice and came a cropper, the blame could be spread a little more thinly.
Should any staish wish to dispense with the services of an individual, that individual was always moved.
When the drawdown in RAFG was beginnining I made informal soundings with SASO ...... did he want Met to stay on each base until the last aircraft flew out? He did.