What is a bluntie?
Answer from the RAF website:
Stewards run dining rooms and bars in Officers’ and Sergeants’ Messes. Trained in silver service, you’ll serve food and drinks to hotel and club standards, making sure that your customers have everything they need. As an RAF Steward you’ll cover a far larger field of professional experience than your civilian counterparts could ever hope for: running dining rooms, bars and reception offices in Officers’ and Sergeants’ Messes, working in field dining rooms and accommodation.
Archetypal bluntie? What is the war role of a steward? If none, why is there a need for uniformed stewards?