good luck with it mate ,my firearms and shotgun certificates expired on 15th april,i sent my renewal forms off begining of march and still havent heard anything, had to phone up and see whats happening i was told its with the enquiries officer and should'nt be much longer, so they sent me tempory certificates,but i still havent heard anything,hopefully your firearms department is a little quicker than mine,
all the best,
jay.