Both of those apprenticeship schemes ceased quite some time ago and most Supertechs have left, or are about to leave, the service. I know of two Supertech retirees still attached to the military but no longer in it.
DE courses also finished some years ago and now all RAF aircraft mechanic and technician courses are conducted at Cosford.
I believe ALL techies are now started as Mechanics. - No Appo's, no Short Techy Courses.
...and all courses are now heavily modular - even type courses.