Although I agree with everything said I have seen the other side of EASA. 2 years ago i was to be the 2nd helicopter to have an Aspen PFD put into it ( 500D ) we applied to EASA to have it as a minor mod as there was no STC. They came back within 1 week and said yes. Couldn't believe it !!! until they said they were going to ask Gatwick to do the paperwork, 6 months later with lots of e mails, shouting , swearing threatening legal action it was finally passed !!
So UK CAA still has the last laugh