According to Irish Air Letter - latest issue, it reported that some source had stated that Aer Lingus is looking at regional jets for delivery in the next 2 years, mentioned Embraer and C Series, and apparently C Muller had said he thinks C Series is a fantastic concept, and given that LH will have it tried and tested that will give them a chance to see how they get on with it, he also said that given that the aircraft is partially made on the Island of Ireland, they would give it close consideration.
EI-BUD