The 2360/1 and the 2360/2 were the only qualifications avaliable at that time (in the 1980's).
Ive wondered about this question too.
Luckly I think im going to be in employment soon. Working for the government. Im just awaiting the 'vetting procedure' to be completed.
I contacted the JIB to try to get an 'approved' electrician card. To get this you need to prove training. I didnt do a reconised apprentiship, but i have 13 years experience. 3 years of that was spent in industrial and marine work.
Im just hoping that the 'vetting' goes well. Because if I get this job I won't ever need to contact the JIB again.