Well......I dunno much me!
But I do know that I look at the internet, find the cheapest carrier & fly with them!
Ryanair get my vote!
Each to their own etc! But my choices DUB-EDI are Ryanair or Aer Lingus, I admit Ryanair aren't always cheapest.....but I groan when i have to fly Aer Lingus! They never leave on time & take longer to do everything! Ryanair are rarely anything other than early!
& that wins my vote!