I think the RAF moved to training single trade Avionics in 87, that was certainly when the last L Tech FS courses finished, although I accept that the AV courses might have started earlier to ensure a continous supply of fresh technicians and mechanics.
I was one of the last to be "converted" spending a whole 3 days to learn aircraft comms and I think 2 1/2 weeks mastering radar including waveguide theory and that was in February 93.
Of course since then the Electrician and Avionics trade have been merged, in line with something or other, although I thought the electrician training was a lot like my insty training for the most part and couldn't work out what the dog was for
