Uniforms of the Royal Marines musicians, plus cadets and instructors of the affiliated cadet organisations. This is the same as 1B dress but is worn with medal ribbons instead of medals and decorations. This consists of a scarlet mess jacket with a royal blue shawl collar, worn with royal blue trousers with a scarlet stripe, Marcella shirt and royal blue mess waistcoat. Officers above the rank of brigadier have their rank on shoulder straps, whilst all other officers have their rank marking positioned horizontally on the lapels of the collar. Officers of the rank of lieutenant-colonel wear stiff-fronted shirts and overalls (tight fitting cavalry trousers),
British Army mess dress on each lapel, green shoulder straps, and green cuffs is worn. A single-breasted green waistcoat without lapels with four gold buttons is also worn. The version worn by NCOs has no shoulder straps, lacks the green cuffs and features rank stripes on the upper right arm, but is in all other respects the same. For officers, a single-breasted green mess jacket with no buttons, with a buff shawl collar with corps badge on each lapel, buff shoulder straps, and buff cuffs is worn. A single-breasted buff lapelled waistcoat with four gold buttons is also worn. The version worn by NCOs