Marine were abolished. Technical trades and musicians only. Promotion to the rank of Junior Technician ceased in 2005, only to be replaced by Senior Aircraftman (Technician) a short time later. The most senior WO1s are, in descending order, the Army Sergeant Major, the Conductors (Cdr) of the Royal Logistic Corps, the Royal Artillery Sergeant Major, Royal Artillery, the Academy Sergeant Major (AcSM), and the Garrison Sergeant Major (GSM) of the London District. British army WO1 includes Regimental Sergeant Major (RSM), Garrison Sergeant Major (GSM), and Household Cavalry Regimental Corporal Major (RCM). These appointments are similar in function to the equivalent US rank indicated, but are equal in rank to other WO1 appointments. British army WO2 includes Company Sergeant Major (CSM), Squadron Sergeant Major (SSM), Royal Artillery Battery Sergeant Major (BSM), Household Cavalry Squadron Corporal Major (SCM), and Band Sergeant Major. These appointments are similar in function to the equivalent US rank indicated, but are equal in rank to other WO2 appointments. British army Staff Sergeants can also hold other appointments, such as Company Quartermaster Sergeant. There are no Sergeant ranks or appointments (Sergeant, Colour Sergeant, and Sergeants Major) in the Household Cavalry, having different grades of Corporal instead, such as Corporal of Horse or Staff Corporal. There are no Corporals or Lance Corporals in the Royal Artillery, but equivalent ranks exist in the form of Bombardier and Lance Bombardier. On 1 April 2010, the RAF Regiment introduced the rank of Lance Corporal for current SACs who undertake the role of section second-in-command/fire team commander. This gives them more authority on the ground, as well as a better pay band. The move to introduce the rank of lance corporal was taken as, due to the RAF Regiments role as specialist infantry, many highly qualified and experienced airmen were tasked with acting as section second-in-command on joint operations with army, Royal Marine and foreign units. The introduction of L/Cpl rank put this on a more formal footing, and eased the minds of many enlisted soldiers from other units who were unhappy being commanded by individuals they perceived as no higher ranked than themselves. In the Brigade of Guards, on promotion to corporal, soldiers are appointed and referred to as Lance Sergeants. In The Rifles, every Sergeant rank or appointment (Sergeant, Colour Sergeant, and Sergeants Major) is spelled using the archaic spelling, "Serjeant". The alternatives to the rank of Private in the British