An RAF Chef would never have been live armed, you had to have successfully completed your trade training before that could happen.
As the RAF Catering course is obviously the hardest course ever invented, must be as no one has ever passed it, cant see how an RAF Chef would ever be trusted with a rifle.
Actually Chef is a misnomer, if you look at their actual job title, they are
"Fitters and Turners"
They take perfectly good food, fit it into cooking containers and turn it into sh*t..