Ryanair will compete with Jet2 on flights to Dusseldorf now which i think is a ffolish move of Jet2 to take on Ryanair. Also theres Pisa!
Then if the prices ar right people would chose Ryanair over Jet2 to destinations sunch as Grenoble instead of Chamberry or Marsaille over Avignon so Jet2 will take a hit from the Ryanair Invasion!
GSM will be hit too but not to bad for now with Nice, Palma and Malaga being the most affected routes.