but you could also add Meridiana/Volotea/Croatian/Alitalia and even parts of the Norwegian network
All these would have to come cap in hand to EZY, their only assets are slots. EZY could just wait for them to fail or retreat then move in accordingly, but that is the same as a few. I'm sure they would be happy to see Norwegian retreat from LGW.
RYR have walked in to Italy over the years and not worried about Alitalia in the slightest.