Navy, Army, Air Force Institutes for those unfamiliar with the acronym. Wonder if anyone has ever had the pleasure of a tin? I have & it was rather splendid. The navy's own blend I had, which was a medium strength mixture with a very tasty rum topping. I've seen tins of the Army blend but never tried it. I'm sure the RAF boys must have had their own blend as well but I've never seen a tin so who knows? People say Player's used to make the NAAFI blends but I could swear the navy tin I had was a Gallahers product, due to the cut & packaging. Maybe someone more enlightened might like to chime in.