I don't understand why you need an ATPL? There is no remuneration element, the aircraft is not operating on an AOC and is not a passenger carrying airliner. The pilot is doing this as a secondary duty outisde their primary duty. Some of the AEF flight profiles meets the intent of the EASA Introductory Flight - which only requires a PPL -
https://www.caa.co.uk/docs/33/Inform...ice2015029.pdf
So is this another attempt to 'guild the lilley' or 'gold plate' by those that regulate Air Cadet flying? The Grobs are even on the Civilian register!!!
LJ