Pilots all commissioned. WSO-navigator types all commissioned. NCA WSOp-Crewman,EW,Acoustics,Linguist all non-com. If you have youth on your side go for pilot. But dont discount the others as you may get the chance to advance to Pilot while serving. AAC have non com pilots but only after a few years doing other stuff and only if you have the aptitude. Have a look at RAF Careers website. But do you resarch thoroughly before putting pen to paper. They expect you to know lots about the trades you thinking of doing before investing lots of cash to put you through.