I don't agree with anyone's comments on allowing pilots with NPPL's or PPL's to train as a flying instructor for renumeration.
A proper CPL course tones up PPL skills and demands accuracy in flying. The medical required is Class 1 and thats important due to the physical requirements of a flying instructor. The exams you need to pass are more geared to the airlines, thats true, but thats because the norm is to move on eventually to bigger stuff (not necessarily better!).
An instructor should have experience and detailed knowledge, not just in terms of flying hours by the way.
I'm young-ish, just finishing my FiC and passionate about passing on my love for flying to others. I have criticisms about how I was taught to fly but aim not to repeat them myself. The course is hard, fun and requires depth of knowledge. There has to be a standard for taking the course and a PPL or NPPL isn't sufficient in my view.
Sorry!
