Martin, I think that some of the chaps above are giving you advice based on the Officer entry interview process.
As a cursory inspection of Martin's posting history will reveal, he is a keen young lad who is a bit lacking in the academic qulaifications department. He has an ambition to eventually be a pilot, but seems unlikely to pass a military aircrew medical, so is looking perhaps towards the civilan world in the medium-term. To give himself the best possible chance at both being involved with aviation and working for an employer who will encourage and enable him to gain the qualifications he needs to progress, he has chosen (after sensibly taking a great deal of advice) to try to join the RAF as a Flight Ops Assistant - which role, conveniently, requires no specific academic qualifications for entry.
I hope this background will help in your efforts to advise him.
Scroggs