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 NCOs is the same, only the lines of gold piping on jacket and waistcoat are thinner, it features gold shoulder straps rather than shoulder cords, and rank stripes are worn on the upper right arm. The mess jacket as worn by female NCOs is the same as that worn by male NCOs but does not feature shoulder straps. A royal blue mess jacket with a purple shawl collar featuring the departmental badge on either lapel, purple cuffs, and royal blue shoulder straps. A purple cummerbund, black clerical shirt, and white clerical collar are also worn. For officers, a royal blue