Highlanders, 4th Battalion, The Royal Regiment of Scotland "Drummer", "Trumpeter", "Bugler", "Piper" and "Musician" in various military bands and musicians in other units The Royal Artillery and RHA also uses the ranks Gunner instead of Private, and Lance Bombardier and Bombardier instead of Lance Corporal and Corporal, while The Rifles use the spelling "Serjeant" in place of "Sergeant". Foot Guards and Honourable Artillery Company Household Cavalry The Household Cavalry maintains the old cavalry tradition of having no rank of sergeant, which was originally an infantry rank only. It has its own peculiar set of insignia and ranks with the following equivalents: Similarly, warrant officer appointments are different, with, for example, "regimental corporal major" being used in place of regimental sergeant major. Uniquely, NCOs and warrant officers of the Household Cavalry do not wear any insignia on their full dress uniforms (although officers do). Rank is indicated by a system of aiguillettes. Cavalry regiments In several cavalry regiments including the 1st The Queen's Dragoon Guards and the Queen's Royal Hussars, NCOs holding the rank of lance corporal wear two stripes. Full corporals are distinguished by the addition of a cypher above their two stripes in dress uniforms. Staff sergeants in an appointment as squadron quartermaster sergeant in the cavalry, sometimes wear four stripes with a crown and are referred to as "sergeant major". The term "mister" is confined to WO2s. Spelling The spelling serjeant is sometimes seen. This was the official spelling in the British Army and Royal Marines, although not the Royal Air Force, until the 1930s and appeared in such publications as King's Regulations and the Pay Warrant, which defined the various ranks. In common usage, the modern spelling sergeant was already more usual, as in the volumes of the Official History which began to appear in the 1920s. Serjeant-at-Arms is a title still held by members of the security staff in the Houses of Parliament. The old spelling is also retained by The Rifles, as successor to the Royal Green Jackets and The Light Infantry, which also used it. Timeline of changes Historical ranks Sergeant-major: equivalent to the current regimental sergeant major, a warrant officer class 1 Company sergeant-major: now an appointment of warrant officer class 2 Quartermaster sergeant: can now be a regimental quartermaster sergeant (warrant officer class 2) or a company quartermaster sergeant (staff sergeant). In the technical corps, a WO2 can also be an AQMS