The £90 a year is for the person that comes in to teach!
I don't really understand what you mean by this. Flying training costs an absolute fortune. You would typically pay for:
- Time of a ground instructor
- Materials for ground instruction
- Time for flight instructor
- Hire of aircraft
- Exam fees
- Licence issue fees
- Landing fees
- Navigation charges
Not even ATPL exam ground instruction costs an individual £90 per year, and while your flying in air cadets useful, it does not count a great deal towards the flight time required for CPL/IR licence issue.
Please clarify what you think this scheme actually involves and get back to us. As superpilot says, you are not making much sense at the moment.
Good luck.