Same at a fighter base (pre-F3) in Lincolnshire. The staish waived the right for the execs to be exempt.
Back to the question. Try Churchill for it was he who said the RAF should defend itself and not expect the army to do it for them. However we are going the same, right, way enlarging the professional corps as a skilled tradesman cannot be afforded to waste his time doing extramural duties. Fight or defend the base and his unit but not be diverted to doing another professionals job.