Have just been examining the list of attendees at Routes Europe 2017 which took place in Belfast over last few days.
Had a look at attendee list and it seems that City of Derry Airport was not an official attendee as an airport.
Every airport on the Island or Ireland and most in wider UK are listed as attending with their logos.
It appears that the 'parent company' Regional City Airports attended but surely the airport could have been presented at it better.