DSA-DUB
To be fair Dsa poached Thomsons from Leeds at the very beginning having assumed all the Leeds customers would be happy to travel down to Dsa instead. They seem to have got it wrong and have now begun a return to their original home having only added to the growth of Jet 2 at Leeds over the last ten years. They picked up many of the Leeds area Thomson customers and have continued to be very aggressive at many other northern airports but not, for whatever reason, at Humberside or Dsa. Maybe they do not want to dilute the passenger levels at Leeds until the market shows growth again.
I think Humberside will plod along ok with its helicopter operations together with summer charters and Klm flights. Wizz Air seem to be populating the Boston area and Dsa is very well placed for that so it seems they will be happy to stay with you.