Probably not, but 'valued consideration' means more than just cash in the hand.
After the Police Optica accident, the CAA took a long hard look at PPL holders doing anything other than flying either privately or sharing costs with others.
The Air Cadet website states that 'AEF aircraft are flown by volunteer pilots, all of whom are current or former service pilots.'
Parents of Air Cadets thus have an expectation that their offspring will be flown by people with rather higher qualifications than a PPL. If such pilots are unavailable, then as a minimum a CPL holder should be contracted to provide the service requirement.