Having read the hansard from yesterday's Stormont it seems it's a support package related to the route development fund, the airline in question has proposed two routes and is considering the package on offer. It does sound awfully like Norwegian, also reference was made to the fact several airlines have expressed interest, more than the three mentioned.
Also a random point, which I know will upset a hornets nest on here is the state funded 2nd runway at DUB which was half jokingly suggested as a possible cause for complaint to the EU over state aid......