There is a rumour floating round that 55 Sqn is about to close and that will be the end of Commissioned WSO training as we know it... all NCA WSO training to be taken over by 45 Sqn...
I admit it seems unlikely but...
On the commissioned chaps becoming NCA... I've know a few people who've done it, but it was because they got chopped through flying training, and decided to re-branch. They all lost their commissions when they did it.