I have a very unimpressive certificate in the front of my first logbook which says I qualified as an 'Air Navigator' from the School of Air Navigation. I was a member of a ANC. I am not qualified as a WSO, nor do I want to do the WSO course, so what right have I to wear the WSO brevet?
Despite all this WSO this and WSOp that, if you go to the current, i.e today, ACOS Manning website and look at the register of officers postings (or whatever it is called) you will still find listing for trades such as GD(N), GD(AEO), GD(ALM), etc. Funny old thing, if you want to post an officer to instruct say ALMs at Brize you still need to make sure you send a WSO who is an ALM as opposed to a WSO who is an AEO!!