If I understand the licensing thing correctly, it is this: any EU based airline can operate between any EU states and within an EU state. Easyjet seems to be having pains with Brexit because it's AOC is UK based. Once Brexit is completed the talk is it will need an EU AOC to operate into or within the EU.
If that is true how will RYR's UK based operations be affected? It operates within UK on internal flights & STN is its biggest base. How will that still be allowed with an EU/IAA AOC? I haven't heard any discussion about its plans.