If you have the 2330 level 3 then why have you got to do the 17th edition 10 week course? The 2330 is to the 17th edition and its the c&g tech cert. I have the 2351 which was about just before they brought in 2330, having this didnt mean i had to do a further course for the 16th edition, because it was the 16th edition c&g tech cert. When the 17th came in i had to do the update course, but that goes without saying.
To be classed as an approved electrician i think you need the 236, 2351 or 2330, the 2391 test and inspect, the AM2 skills test and your NVQ3. You will also need to of served 5 years in total and have had to of had at least 2 men working under your supervision. This is only based on what i have heard that other people have had to do in order to be approved, it might be different for others im not 100%.
As zamb said though, experience is paramount in order to becoming good at your job, thing is though companies prefer to see paper work, if they dont they can take advantage of you by giving you sh*t money, also if you have paper work then your somebody they can shift blame on to, apart from the fact that paperwork proves to them that you have the competence to do the work, even though this can be untrue as well.
Take the supposedly qualified electricians that appear from the army or navy for instance, they have all the paper work possible but they do not have an f'ing clue as to how to install electrics, useless springs to mind and the word "how"? Every X serviceman i have met that is an "electrician" has been rubbish by the exception of one.
To sum it up, you can have all the certs needed and be rubbish or you could have no certs but have been doing it for 30 years, have had a vast amount of various different experiences and be f'ing spot on. Its all a load of money making bollox how ever you look at it, there are loads of cowboys with the certs, doesnt take much to open a few books and pass a few exams.
Sorry if this is more than what u bargained for, im bored