....15 hrs Instructor training.
Not correct! The JAR-FCL requirement is to complete the approved relevant course of training, which, for a FI(A) is the course described at JAR-FCL 1.340 (i.e. 125 hours ground training and 30 hours flight training). However, to quote Appendix 1 to JAR-FCL 1.300 -
"The course may be modified, as approved by the Authority, taking into account the previous training and the experience of the applicant, but shall comprise at least 30 hours of ground instruction and 15 hours of dual flight instruction." It should not be assumed, therefore, that only 15 hours of flight training will be required.