A&B
My point being a 16 year old Cadet was able to attain this certificate before he could drive a motor car. This was the USP for the organisation and a source of pride on the Squadrons. Was sadly replaced with oodles of dual and One solo.
A Cadet could then apply for an advanced course (more solo's and check out to single seater), and the keen ones would get into a school as a SC.
Brilliant system that made the ATC different to all other organisations,and it was the SOLO aspect that gave the Cadets the inspiration and confidence.