They could have gone to EASA and hammered out an agreement to stay within the broarder confines of the EASA community. But no, they appear to have done nothing.
Actually they tried to do exactly that, and the EASA guys in Cologne were all set for it. But then Brussels intervened and told EASA they were not permitted to do that, and instead had to produce the paper referenced above with the no deal scenario.
Putting political dogma above the best interests of the population, who'd have thought it...