ShotOne
As mentioned prior, this is common place. TUI, a UK airline, operate ex DUB to both Canaries and Carribbean, with no Irish crew or setup. Virgin, operate to the US via Dublin, albeit for cargo. BA Cityflyer operate from Dublin to sun routes in Spain. Norwegian is perhaps the perfect example, an airline setup to avoid labour laws operating throughout Europe. The world is a global place now, and it's a cautious line between protecting jobs and xenophobia. Aer Lingus are unionised, with strong working conditions and a seniority list, the nationality of its workers is entirely besides the point. They will be paying tax in the UK, many will relocate to the UK and not that it's worth anything, but many pilots and crew within EI are in fact British.