Oberon - to dot some more I's, I've lifted this from the LAA site. Assuming it's correct, and it looks ok to me, It gives a decent summary of the situation from the early 60's when we joined until 76 when it all came to an end.
" 'Air’ trade groups apprentice training was transferred to RAF Cosford in 1965. Training in the ‘Ground’ specialisations continued at No: 1 Radio School.
The 106th final entry of Aircraft apprentices passed out in 1966.
The first Technician apprentice entry was the 107th. It passed out in 1967. Technician entries continued (missing out the 110th) up to and including the 122nd which passed out in 1976.
A 2 year course Craft apprentice training was introduced with the 201st entry and entries continued up to the 226th and then a single entry the 231st which passed out in 1974.
The first entry of Mechanic apprentices, the 402nd (a 1 year course) commenced training in 1970. There were only 5 such entries. The final mechanic apprentice entry (the 406th) passed out in 1972.
Apprentice training ceased in 1976 with the passing out of the 231st Craft apprentice entry.
This was 24 years after the first Apprentice training started at Locking and 54 years after the first Apprentice entry started training at Flowerdown.