Hello 500 fan. I do remember reading an article a long time ago about Irish helicopters and it mentioned it being set up originally by a Ken Besson who began the operation when he bought the hiller helicopter put up for sale by a departing US ambassador. I remener seeing the aircraft once when I was very young, Can recall it was painted a light blue but I do not know the registration number I'm afraid, guess it could have been EI-ART but cant say for sure.