I never found the need to participate in any adult literacy courses after having completed RAFC training. A year as a Flight Cadet, 4 years at university and another year as a Graduate Entrant seemed sufficient.
I declined the 'C' exam as I could tell that its days were numbered. My boss didn't share my opinion; however, as it turned out, I was right and he was wrong!
The GE scheme was quite reasonable before RAFC went comprehensive and those frlghtful oiks, who would otherwise have been sent to that place in Bedfordshire, were let in. Having already had some somewhat osmotic exposure to the RAF during our UAS time, we only had 3 months of marching about, leadership training (which seemed to centre on carrying logs across Northumberland) and the like. Then 9 months learning to fly the Jet Provost before the graduation and wings parade.
In later years, more and more weeks seemed to be becoming added to officer training, with more and more hours being knocked off the flying training syllabus.
Now I read that the snake oil salesmen plan to have fewer T-6C trainers than we had Chipmunks at ULAS. Will that really work?