With limited exceptions, the unique regimental full dress uniforms finally disappeared after 1939; today they are only generally worn, on ceremonial occasions, by the Bands and Corps of Drums, by certain representatives on parade (e.g. some regimental Pioneers, or those forming a guard of honour) and by the regiments of the Household Division. In most regiments they were replaced by a generic dark blue uniform known as No 1 Dress. This dated back to plain "patrol" uniforms worn by officers before 1914 as an informal "undress" uniform. An early version had been worn by some units in the 1937 coronation of King George VI and Queen Elizabeth but had not been made general issue at the time. In the form adopted after World War II, most regiments were distinguished only by coloured piping on the shoulder straps, coloured hat bands, buttons and badges. However Scottish regiments retained their kilts or trews as well as the distinctive doublets (in "piper green" or dark blue) of the former scarlet uniform.