I can try asking my father - long shot but he was in the Cadets and the Cadets Rifle Team (In West Australiaicon) He may have some insight - i do recall him telling once that they had no real armourer - that he was tasked with cleaning and doing simple repairs on his schools cadet rifles - No1Mk111's - only when they were un-serviceable did the army come and collect and repair and return.
But may take some time as i work away and dont see him for periods of time (and he's not a computer/email user)