I was thinking of instructing at weekends (for minimal £) - although I would sit all the necessary exams first.
Serious question - Would this really p*ss off you full time instructors as much as this forum indicates, (I have nothing against Oz or Kiwi pilots if that makes a difference).
Judging by some of the posts, if I suggested this at my local flying school the only thing I’d be doing at weekends would be learning how to walk again on my broken legs.