Ahh, so his online Skype medical will be the 'filter' medical, pre fitness test, that only really establishes if applicants are potentially fit and well for service. If he successfully passes the OASC board, he will then have the much more thorough RAF medical at Cranwell, which is the final hurdle. This will involve blood tests, ECG, limb measurements and the like.
Interesting to hear that they have closed applications for all branches apart from control. I thought it was just pilot that was closed.