 Brass bands in the British tradition are limited to cornets, flugelhorns, tenor horns (known as alto horns in U.S.A), baritones, trombones, euphoniums, tubas (known as basses in brass bands), and percussion; but not trumpets or French horns, since they are orchestral and concert band instruments.With the exception of the bass trombone and percussion, all parts are transposing and written in the treble clef, which means that for every instrument, the fingering for the written notes is the same.This system, which is unique to UK-style brass bands, ensures most parts can be covered when there is less than a full complement of players.