Yes, but the poll does not reveal how old these '17-20' y.o. trainees now are. With times as they are, people start out later and later, and many people I know have put it all on hold. I would guess that with our government requiring 50% in HE, either more and more will require a degree from low hours joiners, or the degree will be so devalued that it doesn't matter. ie get a good degree if you are going to bother at all from an established university. And aim high on the A-Levels, at least C if you can to go for sponsorships - may as well save the money if you can.
Also try the Air League - web address I do not know.